DOCSLIB.ORG

Historic Mine Opening Closure Methodology, Specifications, and Details – Utah and Colorado Bureau of Land Management Districts

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Historic Mine Opening Closure Methodology, Specifications, and Details – Utah and Colorado Bureau of Land Management Districts Historic Mine Opening Closure Methodology, Specifications, and Details – Utah and Colorado Bureau of Land Management Districts Prepared for Freeport Minerals Corporation December 2017 9191 South Jamaica Street Englewood, CO 80112 Contents Section Page Acronyms and Abbreviations ............................................................................................................. iv Document Overview ......................................................................................................................... 1 Introduction ...................................................................................................................................... 2 Solid PUF Plug with or without Bat Gate ............................................................................................ 3 3.1 Preparation ......................................................................................................................... 3 3.2 Closure Steps ...................................................................................................................... 3 3.3 Material Specifications and Installation ............................................................................. 7 Wire Rope Netting ............................................................................................................................ 8 4.1 Closure Steps ...................................................................................................................... 8 4.2 Material Specifications ....................................................................................................... 9 Fencing ........................................................................................................................................... 10 5.1 Closure Steps .................................................................................................................... 10 5.2 Material Specifications ..................................................................................................... 11 Backfilling ....................................................................................................................................... 12 6.1 Closure Steps .................................................................................................................... 12 6.2 Signage .............................................................................................................................. 13 6.3 Documentation and Monumentation............................................................................... 13 Monitoring, Maintenance, and Reporting ........................................................................................ 14 7.1 Monitoring and Maintenance ........................................................................................... 14 7.2 Monitoring and Maintenance Reporting .......................................................................... 15 Appendices Appendix A Safety Data Sheets Appendix B Site Evaluation Forms Appendix C Detailed Drawings of Polyurethane Foam and Fence Closures Appendix D Specifications Appendix E Standard Operating Procedures PR0616171000DEN iii Acronyms and Abbreviations BLM Bureau of Land Management CFR Code of Federal Regulations Freeport Freeport Minerals Corporation GIS geographic information system HMO hazardous mine opening HMOSP Historic Mine Opening Safety Program ICF insulated concrete form block JHA job hazard analysis PPE personal protective equipment psi pounds per square inch PUF polyurethane foam SDS safety data sheet SOP standard operating procedure PR0616171000DEN iv SECTION 1 Document Overview This document provides detailed methods and typical drawings of closure methods that will be used to close or seal historic mine openings (HMOs) on Bureau of Land Management (BLM)-administered lands in Utah and Colorado. The document also provides material-specification information. Freeport Minerals Corporation (Freeport) or its contractors will complete the work described in this document. The work described in this document consists of closing HMOs by installing polyurethane foam (PUF), backfill, fencing, and wire rope nets within adits, inclines, declines, or shafts. Work includes clearing and grubbing, excavation of loose materials, trimming of openings, furnishing and securing the closure materials, and placing signage and monuments. Closure materials and specifications are generally consistent with the Colorado Department of Natural Resources Division of Mining, Reclamation, and Safety General Bid Specifications Handbook, published March 2009, and the Utah Abandoned Mine Reclamation Program’s “boilerplate” construction contract specifications published February 2011. All work conducted will be executed in accordance with the Proposed Action and National Environmental Policy Act of 1969 Categorical Exclusion that is specific to each project and approved by BLM. PR0616171000DEN 1 SECTION 2 Introduction Historic mine openings (HMOs) represent adits, shafts, trenches, inclines, declines, glory holes, or any other distinct identifiable feature that was used to excavate materials for mining, is no longer in use, and will not be used to excavate or mine materials soon. The following sections describe the five primary approaches used to permanently close HMOs: • Section 3: Solid PUF plug with or without a bat gate • Section 4: Wire rope netting • Section 5: Fencing • Section 6: Backfilling All materials will be prefabricated offsite, brought to the closure location during the time of the closure, and will not be stored onsite. PR0616171000DEN 2 SECTION 3 Solid PUF Plug with or without Bat Gate The process for closing a HMO with a solid PUF plug and installation of a bat gate within PUF are presented together in the following steps. The only difference between a solid PUF plug and a PUF plug with a bat gate is the bat gate. The same steps and approach are taken for each closure technique. HMOs that will be closed with PUF shall follow the steps below. 3.1 Preparation Prior to starting any work at the entrance of an HMO: • A work area inspection shall be completed to identify: − Overhanging debris, high walls, etc. − Fall hazards and appropriate tie-off procedures and points − Chemical and explosive hazards − Locations requiring flagging around the work zone to indicate where fall restraints are required and where only authorized staff are allowed − All other applicable hazards • Air monitoring at the HMO shall be completed to ensure the atmosphere is a safe working environment. − Air monitoring standard operating procedures (FMC HMOSP SOP04-14, Appendix E) shall be followed. − Air monitoring includes: radon, oxygen, lower explosive limit, sulfur dioxide, carbon monoxide, and hydrogen sulfide. • If closing an adit or an HMO in which breaking the entrance plane of the HMO is required, the HMO shall be evaluated for confined space determination. • No openings which meet the definition of confined space shall be physically entered by personnel. 3.2 Closure Steps • Perform a work area inspection by physically walking the area and identifying all potential hazards that may exist in the area. • Complete a job hazard analysis (JHA) for each closure activity. • Control, reduce, or eliminate all potential hazards identified in the JHA. If working on an HMO closure with a fall potential, use proper fall protection procedures while working (FMC HMOSP SOP04-02, Appendix E). • Eliminate tripping hazards around the work area and ensure proper housekeeping. • Maintain control of the supplies and equipment being used in the area. Anchor points may need to be established to maintain the weight of the materials being installed until the mine opening has been sealed. Use of rebar stakes, natural terrain features, or equipment may be necessary. Bat gates, vent pipes, drainage pipes, and bulkheads will be secured either by ropes, fir strips, or any other means possible at mine openings. PR0616171000DEN 3 SECTION 3—SOLID PUF PLUG WITH OR WITHOUT BAT GATE • Clear all set-up planks and walkways of debris and tripping hazards. All planks/walkways will be secured and anchored in a way to eliminate any twisting or falling motions. Personnel using the scaffolding or planks will be tied off with fall protection devices in accordance with the Fall Protection Guidelines. Handrails are not permitted on planks or walkways. • When closing adit-type features, a rock wall will be built while pouring or spraying the PUF in stages. Insulated concrete form block (ICF) may also be used in lieu of rocks. This allows the foam to be used as grout on the interior of the rock or ICF wall, cementing and anchoring the rocks or ICF into the foam. • When closing shaft-type features, the foam will be poured until reaching a depth below the existing ground surface of approximately 2 feet. Cover material will later be placed on top of the foam to blend into the existing ground surface. • If ICFs are to be used in lieu of local rocks for the exterior face, ICFs shall have the exterior face finish of a polymer-modified cement, reinforced with a woven glass fiber, that will be dyed as close as possible to the surrounding environment. ICFs shall be reinforced internally with Grade 60 #4 (0.5-inch diameter) rebar . Exterior face finish shall consist of a polymer-modified cement, Omega DryBond® or equivalent. Add one 50 lbs bag of dry mix to 1.5 gallons of water and mix for 3 to 5 minutes. Add concrete dye as needed prior to mixing. See manufactures recommendations
Load more

Recommended publications
  • +1. Introduction 2. Cyrillic Letter Rumanian Yn
    MAIN.HTM 10/13/2006 06:42 PM +1. INTRODUCTION These are comments to "Additional Cyrillic Characters In Unicode: A Preliminary Proposal". I'm examining each section of that document, as well as adding some extra notes (marked "+" in titles). Below I use standard Russian Cyrillic characters; please be sure that you have appropriate fonts installed. If everything is OK, the following two lines must look similarly (encoding CP-1251): (sample Cyrillic letters) АабВЕеЗКкМНОопРрСсТуХхЧЬ (Latin letters and digits) Aa6BEe3KkMHOonPpCcTyXx4b 2. CYRILLIC LETTER RUMANIAN YN In the late Cyrillic semi-uncial Rumanian/Moldavian editions, the shape of YN was very similar to inverted PSI, see the following sample from the Ноул Тестамент (New Testament) of 1818, Neamt/Нямец, folio 542 v.: file:///Users/everson/Documents/Eudora%20Folder/Attachments%20Folder/Addons/MAIN.HTM Page 1 of 28 MAIN.HTM 10/13/2006 06:42 PM Here you can see YN and PSI in both upper- and lowercase forms. Note that the upper part of YN is not a sharp arrowhead, but something horizontally cut even with kind of serif (in the uppercase form). Thus, the shape of the letter in modern-style fonts (like Times or Arial) may look somewhat similar to Cyrillic "Л"/"л" with the central vertical stem looking like in lowercase "ф" drawn from the middle of upper horizontal line downwards, with regular serif at the bottom (horizontal, not slanted): Compare also with the proposed shape of PSI (Section 36). 3. CYRILLIC LETTER IOTIFIED A file:///Users/everson/Documents/Eudora%20Folder/Attachments%20Folder/Addons/MAIN.HTM Page 2 of 28 MAIN.HTM 10/13/2006 06:42 PM I support the idea that "IA" must be separated from "Я".
    [Show full text]
  • An Exploratory Study on Functionally Graded Materials with Applications to Multilayered Pavement Design
    An Exploratory Study on Functionally Graded Materials with Applications to Multilayered Pavement Design Ernie Pan, Wael Alkasawneh, and Ewan Chen Prepared in cooperation with The Ohio Department of Transportation and the U.S. Department of Transportation, Federal Highway Administration State Job Number 134256 August 2007 1. Report No. 2. Government Accession No. 3. Recipient’s Catalog No. FHWA/OH-2007/12 4. Title and subtitle 5. Report Date An Exploratory Study on Functionally Graded Materials with August 2007 Applications to Multilayered Pavement Design 6. Performing Organization Code 7. Author(s) 8. Performing Organization Report No. Ernie Pan, Wael Alkasawneh, Ewan Chen 10. Work Unit No. (TRAIS) 9. Performing Organization Name and Address 11. Contract or Grant No. 134256 Department of Civil Engineering The University of Akron 13. Type of Report and Period Akron, OH 44325-3905 Covered Final Report 12. Sponsoring Agency Name and Address 14. Sponsoring Agency Code Ohio Department of Transportation 1980 West Broad Street Columbus, OH 43223 15. Supplementary Notes 16. Abstract The response of flexible pavement is largely influenced by the resilient modulus of the pavement profile. Different methods/approaches have been adopted in order to estimate or measure the resilient modulus of each layer assuming an average modulus within the layer. In order to account for the variation in the modulus of elasticity with depth within a layer in elastic pavement analysis, which is due to temperature or moisture variation with depth, the layer should be divided into several sublayers and the modulus should be gradually varied between the layers. A powerful and innovative computer program has been developed for elastic pavement analysis that overcomes the limitations of the existing pavement analysis programs.
    [Show full text]
  • PSI CHI JOURNAL of PSYCHOLOGICAL RESEARCH Psi Chi Is the International Honor So­Ciety­ in Psychology, Found­Ed in 1929
    Psi Chi Psychological Journal of Research SUMMER 2018 | VOLUME 23 | ISSUE 3 ISSN: 2325-7342 Published by Psi Chi, The International Honor Society in Psychology ® ® ® ABOUT PSI CHI PSI CHI JOURNAL OF PSYCHOLOGICAL RESEARCH Psi Chi is the International Honor So ciety in Psychology, found ed in 1929. Its mission: "recognizing and promoting excellence in the science and application of psy chol ogy." Mem­ SUMMER | VOLUME 23, ISSUE 3 ber ship is open to undergraduates, graduate students, faculty, and alumni mak ing the study of psy chol ogy one of their major interests and who meet Psi Chi’s min i mum qual i fi ca tions. EDITOR Psi Chi is a member of the Asso cia tion of Col lege Honor Soci et ies (ACHS), and is an affiliate DEBI BRANNAN, PhD of the Ameri can Psy cho logi cal As so cia tion (APA) and the Association for Psy cho log i cal Western Oregon University Science (APS). Psi Chi’s sister honor society is Psi Beta, the na­­tional honor society in Telephone: (503) 751-4200 psychology for com mu nity and junior colleges. E-mail: [email protected] Psi Chi functions as a federation of chap ters located at over 1,150 senior col leg es and universities around the world. The Psi Chi Central Office is lo cat ed in Chatta nooga, ASSOCIATE EDITORS Ten nessee. A Board of Directors, com posed of psy chol o gy faculty who are Psi Chi members MARY BETH AHLUM, PhD and who are elect ed by the chapters, guides the affairs of the Or ga ni za tion and sets pol i cy Nebraska Wesleyan University with the ap prov al of the chap ters.
    [Show full text]
  • 5892 Cisco Category: Standards Track August 2010 ISSN: 2070-1721
    Internet Engineering Task Force (IETF) P. Faltstrom, Ed. Request for Comments: 5892 Cisco Category: Standards Track August 2010 ISSN: 2070-1721 The Unicode Code Points and Internationalized Domain Names for Applications (IDNA) Abstract This document specifies rules for deciding whether a code point, considered in isolation or in context, is a candidate for inclusion in an Internationalized Domain Name (IDN). It is part of the specification of Internationalizing Domain Names in Applications 2008 (IDNA2008). Status of This Memo This is an Internet Standards Track document. This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on Internet Standards is available in Section 2 of RFC 5741. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc5892. Copyright Notice Copyright (c) 2010 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License.
    [Show full text]
  • Orion 3A Manual
    Orion-3A Pneumatic Pressure Controller Part #55287, Patent No. 4.698.998 SPECIAL FEATURES: • Orion 3A is a variable volume pressure controller with on operating pressure from vacuum to 10,000 psi. It consists of two low torque, fine micro-metering valves with positive shut-off, adjustable stop and soft seat. The pressure valve controls the inlet pressure and the other valve vents to atmosphere. • The vernier is located at the center of the controller and allows the operator a very fine pressure adjustment (approx. ±5% point max.) without using the pressure or vent valve. • Selecting the appropriate O-ring material may extend the wide range of gas applications. • There is one inlet, one outlet, and two test ports. One test port may be used to connect a pressure transducer or pressure gage standard; the other test port may be used to connect the unit under test. OPERATION: The pressure valve will begin to open when it is turned counter clockwise approximately 15 degrees. Full open position of the valves is achieved with a maximum of 3 1/2 turns from the closed position. Use the pressure/vent valves to achieve ±95% of the target pressure. The pressure and vent valves must be closed before operating the vernier. The vernier is a piston and cylinder configuration, which generates ±5% pressure, or vacuum of the indicated pressure. The vernier has a fine adjustment sensitivity of .005 psi. Very low torque is required to turn the vernier... FINGERTIP ADJUSTMENT EVEN AT 10,000 psi!!!!! SPECIFICATIONS: • Pressure Range: 0-10,000 psi and Vacuum • Proof Pressure: 15,000 psi Precision Precision Pneumatic Controller • Pressure & Vent Valve Orifice: .032 • CV: .007 • Mechanical Rotation: 3 1/2 turns (nom.) • Torque: Fingertip adjust (even at 10,000 psi) • Vernier Volume: .4 cubic inch (nom.) • Mechanical Rotation: 15 turns (nom.) • Adjustable sensitivity: .005 psi • Construction: 300 Series stainless steel body, aluminum knobs, black anodize.
    [Show full text]
  • 52044 Pinelawn Lawn Crypts Augst
    ANDREW M. CUOMO DIVISION OF CEMETERIES GOVERNOR STATE OF NEW YORK DEPARTMENT OF STATE CEMETERY BOARD 123 W ILLIAM S TREET R OSANNA R OSADO NEW YORK, NY 10038 SECRETARY OF STATE CHAIR TELEPHONE: (212) 417-5713 FAX: (212) 417-2322 LETITIA JAMES WWW.DOS.NY.GOV ATTORNEY GENERAL DR. HOWARD A. ZUCKER COMMISSIONER OF HEALTH TO: NEW YORK STATE CEMETERY BOARD FROM: LEWIS A. POLISHOOK, Director CC: ANTONIO MILILLO, Counsel DATE: JULY 22, 2020 RE: PINELAWN MEMORIAL PARK, NO. 52-044 INSTALLATION OF LAWN CRYPTS By application dated July 8, 2020, Pinelawn Memorial Park (the Cemetery) seeks confirmation that the New York State Cemetery Board does not object to its application to develop additional lawn crypts adjacent to a section of lawn crypts approved by the New York State Cemetery Board on December 11, 2018. The Cemetery is the largest regulated cemetery in New York. It consists of 786 acres spanning Wellwood Avenue, and is located in the Town of Babylon, in Suffolk County. It has a series of mausoleum buildings, but is primarily a memorial park, although it also has lawn crypt sections and sections with upright markers. The cemetery appears to be in compliance with all Division regulations; the cemetery is consistently well-maintained and generates few lot owner complaints. The Cemetery maintains a conflict of interest policy. No related parties are involved in this transaction. An excerpt from the Cemetery’s most recent 990 showing compensation is included as an exhibit. Summary of Recommendation The Division recommends approval of the project. The cemetery has a demonstrated track record of selling such burial spaces profitably, and has built them before, so it is familiar with the additional engineering requirements of lawn crypts.
    [Show full text]
  • Presentazione Standard Di Powerpoint
    Linear Accelerators David Alesini (INFN-LNF, Frascati, Rome, Italy) ACKNOWLEDGEMENTS Several pictures, schemes, images and plots have been taken from papers and previous presentations of the following authors that I would like to thank. I would like to acknowledge in particular the following authors: A. Gallo, E. Jensen, A. Lombardi, F. Tecker and M. Vretenar I would like also to acknowledge the following authors: Hans Weise, Sergey Belomestnykh, Dinh Nguyen, John Lewellen, Leanne Duffy, Gianluigi Ciovati, Jean Delayen, S. Di Mitri, R. Carter, G. Bisoffi, B. Aune, J. Sekutowicz, H. Safa, D. Proch, H. Padamsee, R. Parodi, Paolo Michelato, Terry Garvey, Yujong Kim, S. Saitiniyazi, M. Mayierjiang, M. Titberidze, T. Andrews, C. Eckman, Roger M. Jones, T. Inagaki, T. Shintake, F. Löhl, J. Alex, H. Blumer, M. Bopp, H. Braun, A. Citterio, U. Ellenberger, H. Fitze, H. Joehri, T. Kleeb, L. Paly, J.Y. Raguin, L. Schulz, R. Zennaro, C. Zumbach. Detlef Reschke, David Dowell, K. Smolenski, I. Bazarov, B. Dunham, H. Li, Y. Li, X. Liu, D. Ouzounov, C. Sinclair 104 LINACs operating LINAC APPLICATIONS around the world Free Electron Lasers Injectors for synchrotrons Spallation sources for Nuclear waste treatment neutron production and controlled fission for Medical applications: energy production (ADS) radiotherapy Industrial applications Material testing for fusion nuclear reactors National security Material Ion Material/food treatment implantation sterilization LINAC: BASIC DEFINITION AND MAIN COMPONENTS LINAC (linear accelerator) is a system that allows
    [Show full text]
  • Cracking of the PCC Layer in Composite Pavement
    Cracking of the PCC Layer in Composite Pavement A DISSERTATION SUBMITTED TO THE FACULTY OF THE GRADUATE SCHOOL OF THE UNIVERSITY OF MINNESOTA BY PRIYAM SAXENA IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY Lev Khazanovich, Advisor December 2011 © Priyam Saxena 2011 ACKNOWLEDGEMENTS I wish to express my sincere thanks to my advisor Dr. Lev Khazanovich for the guidance, cooperation, and continuous support that he provided during my stay at the University of Minnesota. I greatly appreciate his patience and the encouragement he provided to help me focus on the work. I would also like to thank my thesis committee members Dr. Mihai Marasteanu, Dr. Henryk K. Stolarski, and Dr. Douglas M. Hawkins for their help and valuable feedback on this dissertation. The financial support provided by the Minnesota Department of Transportation and the Federal Highway Administration (FHWA) Transportation Pooled Fund Study TPF-5(149) ―Design and Construction Guidelines for Thermally Insulated Concrete Pavements‖ is deeply acknowledged. Special thanks to all my fellow students for making memories that I will cherish forever. Last but not the least, I am most grateful to my husband, Amit for his love and support during this time. I am forever thankful to my loving family. i To my parents ii ABSTRACT An asphalt concrete (AC) overlay of a jointed plain concrete pavement (JPCP) is intended to extend the service life of the existing pavement structure. Also known as composite pavements, such pavements exhibit features of both rigid and flexible pavements. While behavior of rigid pavements is mainly elastic, behavior of asphalt layer is load-duration dependent.
    [Show full text]
  • 204.02 204-1 Section
    204.02 1 SECTION 204 - EXCAVATION AND BACKFILL 2 FOR MISCELLANEOUS FACILITIES 3 4 5 204.01 Description. This section describes the following: 6 7 (A) Excavating and backfilling to depths and lines established for 8 foundations of roadway and sign lighting standards, and traffic signal 9 standards. 10 11 (B) Excavating and backfilling trenches for utilities pipes (including water, 12 sewer, telephone, oil, and gas lines) and conduits (including roadway and 13 sign lighting, traffic signal, and other communications systems). 14 15 (C) Excavating and backfilling for water and sewer manholes and 16 appurtenances. 17 18 (D) Disposing of surplus material from excavations. 19 20 Excavating and backfilling for water and sewer pipes, manholes, and 21 appurtenances are described further in Section 624 – Water System and Section 22 625 – Sewer System. 23 . 24 204.02 Materials. 25 26 Structure Backfill Material 703.20 27 28 Trench Backfill Material 703.21 29 30 Geotextiles for Underdrain Applications 716.03 31 32 Cullet and Cullet-Made Materials 717 33 34 Structure and trench backfill material shall include mixture of aggregate and 35 cullet. When cullet is not produced on the project island, or material unit price of 36 cullet is greater than material unit price of structure backfill or greater than material 37 unit price of trench backfill, cullet may be excluded for that backfill application. 38 Before excluding cullet, submit availability and pricing documentation. 39 40 Trench gravel backfill material shall conform to AASHTO M 43, size number 41 67. When tested in accordance with AASHTO T 96, the LA abrasion shall not 42 exceed 40 percent at 500 revolutions.
    [Show full text]
  • 1 Symbols (2286)
    1 Symbols (2286) USV Symbol Macro(s) Description 0009 \textHT <control> 000A \textLF <control> 000D \textCR <control> 0022 ” \textquotedbl QUOTATION MARK 0023 # \texthash NUMBER SIGN \textnumbersign 0024 $ \textdollar DOLLAR SIGN 0025 % \textpercent PERCENT SIGN 0026 & \textampersand AMPERSAND 0027 ’ \textquotesingle APOSTROPHE 0028 ( \textparenleft LEFT PARENTHESIS 0029 ) \textparenright RIGHT PARENTHESIS 002A * \textasteriskcentered ASTERISK 002B + \textMVPlus PLUS SIGN 002C , \textMVComma COMMA 002D - \textMVMinus HYPHEN-MINUS 002E . \textMVPeriod FULL STOP 002F / \textMVDivision SOLIDUS 0030 0 \textMVZero DIGIT ZERO 0031 1 \textMVOne DIGIT ONE 0032 2 \textMVTwo DIGIT TWO 0033 3 \textMVThree DIGIT THREE 0034 4 \textMVFour DIGIT FOUR 0035 5 \textMVFive DIGIT FIVE 0036 6 \textMVSix DIGIT SIX 0037 7 \textMVSeven DIGIT SEVEN 0038 8 \textMVEight DIGIT EIGHT 0039 9 \textMVNine DIGIT NINE 003C < \textless LESS-THAN SIGN 003D = \textequals EQUALS SIGN 003E > \textgreater GREATER-THAN SIGN 0040 @ \textMVAt COMMERCIAL AT 005C \ \textbackslash REVERSE SOLIDUS 005E ^ \textasciicircum CIRCUMFLEX ACCENT 005F _ \textunderscore LOW LINE 0060 ‘ \textasciigrave GRAVE ACCENT 0067 g \textg LATIN SMALL LETTER G 007B { \textbraceleft LEFT CURLY BRACKET 007C | \textbar VERTICAL LINE 007D } \textbraceright RIGHT CURLY BRACKET 007E ~ \textasciitilde TILDE 00A0 \nobreakspace NO-BREAK SPACE 00A1 ¡ \textexclamdown INVERTED EXCLAMATION MARK 00A2 ¢ \textcent CENT SIGN 00A3 £ \textsterling POUND SIGN 00A4 ¤ \textcurrency CURRENCY SIGN 00A5 ¥ \textyen YEN SIGN 00A6
    [Show full text]
  • Measurement of the CP-Violating Phase Phis in the Bs -> J/Psi Phi
    Physics Letters B 816 (2021) 136188 Contents lists available at ScienceDirect Physics Letters B www.elsevier.com/locate/physletb Measurement of the CP-violating phase φs in the 0 → → + − + − Bs √ J/ψ φ(1020) μ μ K K channel in proton-proton collisions at s = 13 TeV .The CMS Collaboration CERN, Switzerland a r t i c l e i n f o a b s t r a c t Article history: 0 The CP-violating weak phase φs and the decay width difference s between the light and heavy Bs Received 5 July 2020 mass eigenstates are measured with the CMS detector at the LHC in a sample of 48 500 reconstructed Received in revised form 24 February 2021 0 → → + − + − Bs J/ψφ(1020) μ μ K K events. The measurement is based on a data sample√ corresponding Accepted 26 February 2021 −1 to an integrated luminosity of 96.4fb , collected in proton-proton collisions at s = 13 TeV in Available online 3 March 2021 2017–2018. To extract the values of φs and s, a time-dependent and flavor-tagged angular analysis Editor: M. Doser + − + − of the μ μ K K final state is performed. The analysis employs a dedicated tagging trigger and a Keywords: novel opposite-side muon flavor tagger based on machine learning techniques. The measurement yields =− ± ± = ± ± −1 CMS φs 11 50 (stat) 10 (syst) mrad and s 0.114 0.014 (stat) 0.007 (syst) ps , in agreement√ with Physics the standard model predictions. When combined with the previous CMS measurement at s = 8 TeV, Oscillations the following values are obtained: φs =−21 ± 44 (stat) ± 10 (syst) mrad, s = 0.1032 ± 0.0095 (stat) ± B physics −1 0.0048 (syst) ps , a significant improvement over the 8TeVresult.
    [Show full text]
  • Hydro-Electric Power Station Reduce Maintenance
    Customer Success Story: Market segment Kraftwerke Oberhasli AG Industrial water Operation under high pressure Specially adapted automatic basket strainer for pressures up to 1,160 psi Location: “Until now, the valves Background These valves use the pressure Innertkirchen, Switzerland The Kraftwerke Oberhasli of the water to control the ball had to be cleaned and AG power plant (KWO) can valves which, in turn, control Challenge: repaired by the KWO generate energy on demand at the intake to the turbines. Protecting a control valve against any time using water dammed Due to the water‘s drop height abrasion from glaciers and every three to four in the Grimselsee, 1909 meters of 670 meters, very high suspended matter in a hydroelectric above sea level. The Swiss pressures occur in the valves power station by installing an months. An automatically energy company makes and their supply lines. automatic basket strainer in the self-cleaning filter is the an important contribution supply line, and operating pressure to generating electricity Challenge of up to 1,450 psi while providing more economical and stabilizing the grid in Sand settling tanks are in place the highest possible degree of Switzerland and Europe from precision in the strainer element solution. A particularly upstream, which prevent the its hydroelectric power plants in entry of coarse particles into challenging problem was the Grimsel area. Solution: the control valves, however In addition, reservoirs act they have demonstrated only Modification of the Eaton to find a filter element as natural batteries in which Model 2596 automatic basket limited success. “Until now, that offers the highest energy can be stored in the strainer with a new, stronger the valves had to be cleaned form of water and later used to housing, special four-fold possible filter fineness and repaired by the KWO every mechanical seal on the flushing arm generate electricity.
    [Show full text]