Report of High Powered Committee on Accident in the Deep
Total Page:16
File Type:pdf, Size:1020Kb
. t.- {i REPORT of HIGH POWERED COMMITTEE . on Accident in the Deep Mining Zone u I of' Rajmaltal,OcP, ECL on 29 Dccember 2016 1-- I "t -l it*;r ir 3;;,, ;,11,; IP,{)lH}iit i I rJj rWfrrtlrda'' , --i.------r, r'r.j)p'ur r t?*a t* ., " \t? - a,.!:'-i,, \:r.i' ':,i lt r'i if i \, I f* l^tl'-. l ,,y'.. I , r'' I ,l{ l 5 rr'lr' I f -.------ i il lr I J | .,rqi-foSt rs6fr 96".r i ' rlr ,.' I t zltn T*-[-- ! -,-./+-rJ---- I -fu --+J I t, **:1' $ftrPoPS i,rci!( i,,rt{r .,,r, #*u f nr. $1fu ,rae l'#.gJtpt l i:_etrq: ; ; '1-';3 :w*rl|; rf : r(r-!,)t:.. ".4 I tneSodydirynmof$lriflryArafsb ? il\J 1 I i $ Volume l: Text \ Table of Contents Table of Contents... 2 1. CHAPTER I.. 6 INTRODUCTION... 6 1.1 Constitution of the Committee 6 1.2 kope of the Committee: ...... 6 : : l',,leetings and Visits of the Committee 7 I rl-APTER ll I 2.i BACKGROUND OF THE PROJECT 8 2.2 PROIECT SITE INFORMATION 8 2.2.I Location 8 2.2.2 Climate 8 2.3 GEOLOGY.... 9 2.3.1 SEQUENCE OF COAL SEAMS AND GEOLOGICAL RESERVES 9 2.3.2 Faults ...72 2.3.3 Hydrogeology 13 2.3.4 Coal Reserves 13 2,4 MINE LIFE.. 74 2.6 MAJOR EQUIPMENT ON ROLL .......15 3. CHAPTER lil............................................... ........................77 CONCEPT AND STUDIES RELATED TO SLOPE STABILIW, SAFETY AUDIT, STATUTORY & ISO INSPECTIOS AND DGMS STIPULATIONS FOR RAJMAHAL PROJECT............,.., 17 3.1 General Mechanism of Slope Fai1ure............ 77 2ll'age F t ...t7 3.2 Slope Stability of waste dumps " " !-- 18 3.7.t Geo-technical Properties of OB Dumps 19 dump Slope Stability-""" 2l_) Hydro-geological parameters influencing 20 influencing stability of dump "" "" " """' 3.2.3 Geo-mining parameters " 20 blast vibration of quarry on the dump " " " "" 3.2.4 Seismicity of the area and ...................... 20 3.2.5 Various modes of failure"""""' 2t batter in coal mines"" """' 3.3 Slope Stability Study of quarry 3.4 SomeoftheRecentSlopefailuresinlndianCoalMinesandtheirCharacteristics.......23 25 Hill Patch of Rajmahal OCP 3.5 Highwall Slope Stabitity Study of Lalmatia 25 mine workings 3.6 Statutory and ISO lnspections ofthe ...............,.......... 26 3.7 Safety Audit of the mine to dump and slope stability of clauses of DGMS permissions related 3.8 Salient provisions 26 thereof: of opencast working and safety features " " 32 4. CHAPTER IV .........32 OPERATION ACCIDENT, RESCUE AND RECOVERY 32 4.t Brief description ofthe accident 32 4.1.1 Status prior to the Accident: ' """"""""" """""" 5) 4.L.2 At the time of Accident ...........,.................33 4.t.3 After the Accident 34 site: 4.2 Photographs taken from the accident """" "" "" 38 and Compensation:" """ "" " """" 4.3 Rescue & Recovery Operation 38 4.3,1 Rescue & Recovery Operation:"""' OCP: 38 Team at Accident site' of Rajmahal " """" 4.3.2 Geophysical Survey by CMPDI and statutory bodies ' ''"40 4.3.3 Monitoring by state administration .....41 05'01'2017: 4.3.4 Stoppage of recovery operation on 3l))it3e \ --< - - 4.3.5 Compensation:... 4L 5. CHAPTTR V..,. 43 ) INVESTIGATION,,... 43 t 5.1 Meetings and visits of the committee.. 43 J 5.2 Creation OB Dump (over Kaveri sump) at Rajmahal OCp.... 44 5.3 Details of award of Work and Modification /Deviation, thereafter, at Dahernangi Patch Deep Zone Mining with reasons and remark 46 5.4 survey of the Dump slide patch in Rajmahal using 3D Terrestrial Laser scanner.........51 5.5 observations of the Committee based on Administrative, statutory and Technical evidences.................. 54 5.5.1 Administrative Analysis (Organizational Aspects):.......... .............54 5.5.2 StatutoryMechanism:........... ...55 5.5 Technical Analysis 56 5.6.1 Methodologyof lnvestigation ........56 2 5.6.2 Stability Analysis ofthe batter :-............... .. 58 2 5.6.3 Values of cohesion and angle of internal friction for rock mass were estimated to be as follows : ...................... 60 5.6.4 Back-analysis of failed batter slope reveals the following :- ..60 I 5.6.5 Dump Stability a na lysis: 60 5.6.6 Geo-technicaldatageneration parameters: .........60 l8 I J- -.t I 4ll'a ge t G AE ! permission and othe r statutory the stipulations in DGMS 6.7.1 Non-compliance of ....:.........66 - provisions:.... " " 66 - 6.2.2 Height of internal OB dump "" ' s slide " """66 of impending danger of """" """""" s 6.2.3 Overlooking the warning signs 1. by associated with the activity s g management about danger 6.2.4 Not advising/apprisin """"""'67 b- Safety organization" """ """" ' "" """'67 s & Planning: "" "" """ 6.7.5 Lapses during Conceptualization 68 s of safety provisions 6.2.6 Lack of awareness i\ 68 for real time monitoring: '' t- 6.2.7 Non-provision of lnstrumentation 68 by DGMS: rl violations during inspections ""' 6.2.8 Non-reporting of taking identified corrective could have been avoided bY 6.3 Whether the accident 68 measures;. 69 i in future: """"""' avoid recurrence of such accidents 6.4 Measures to I 77 List of Annexures ' i t_ I \1 ! \ i t 5 l l' .t': i il CHAPTER I INTRODUCTION 1.1 Constitution of the Committee: ln reference to the office Memorandum, no. CIU CH/Secy/36(Alla76, dated 30.12.2016 (copy enclosed al Annexure-L), issued by the Chairman, ClL, to carry out in-depth analysis of the accident that occurred at the Rajmahal OCP of ECL on 29th Dec.'16 at about 7:30 PM likely involvement of 23(Twenty Three) contractor's workers by a High Powered Committee consisting of the following persons: 1. Sri. Shekhar Saran, CMD, CMPDIL - Chairman of the Committee z. Sri. P K Sinha, Director (Tech./ P&P), SECL - Member 3. Dr. Phalguni Sen, Professor, llT(lSM)- Member 4. Dr. V.K. Singh, Head of Slope Stability Divn., CIMFR, Dhanbad, Member 5. Prof. l. Roy, BIT Mesra - Member 6. Sri. A K Nath, GM/ TS to DT, CIL - Member Secretary The committee has to submit its report within 4 weeks from the date of issue of the said Office Memorandum. 1.2 Scope of the Committee: The committee was constituted to examine the following aspects: a) The cause of accident, b) Human failure, if any, c) Whether the accident could have been avoided by taking identified corrective measures d) Measures to avoid recurrence of such accidents in future in Rajmahal OC and other Mines with similar workings in ECL n 9 {rc1 I ';*,tl^ n \ftir4--- a G e!^^ \ /\\(;P--'' ,/\v[] /1/ ",e_) z 6lPage I 1.3 Meetings and Visits of the Committee: SriShekharSaran,Chairmanofcommitteeinspectedthesiteon05.0l.20lT.Earlierthe (Tech member of the site has been inspected by Shri P K Sinha, Director /P&P)-SECL' 2016' Prof Phalguni High Power Committee, immediately after the accident on 31'12 Power Committee inspected the Sen, Dr. V.K. Singh and A K Nath, members of the High members of team visited the site on 3'd and 4th of Janua ry 2077 ' Dr' lndrajeet Roy other site and collected sample etc. on 04'01'2017 and 05 01 2017' 2017 at CIL' Kolkata' in i) 1st meeting of the committee was held on 18th January Dr.V K Singhi Prof' I Roy; A' K' which, Shri S Saran; Shri P K Sinha; Prof. Phalguni Sen, Nath were Present. at CMPDI' HQ Ranchi' Details of plans ii) 2nd meeting of HPC was held on 01'02'2017 and Section were studied along with the documents' at CMPDI'Rl-l Asansol' iii) 3'd meeting of HPC was held on 03'03'2017 and O4'O3'2O17 and statements were The executive, staff and Contractor workers were interrogated taken. iv) 4th Meeting of HpC was held at CIL ,HQ on27.O3.2Ot7. on 02.04.2017 v) 5th Meeting of HpC was held at CMPDI,HQ, Ranchi G-\ 6,.* Vwf a\ ) O.* rye/ '7 lr L d CHAPTER II 2.1 BACKGROUND OFTHE PROJECT Project Report for Rajmahal opencast was originally sanctioned in August, 19g0 for a rated capacity of 5.0 Mty. The project was subsequently expanded to a rated capacity of 10.5 Mty, the PR for which was sanctioned in Nov., 19g8. This pR was based on the :-oject documents of Rajmahal-A OC Mine (lo.sMty), prepared by METCHEM, Canada -: r Sept. 1987. Subsequently, a Revised Cost Estimate of Rajmahal OCp (10.5 Mty) was -.:-:: :red by the Government of lndia in Jul., 1993. The project was later expanded to a '::.: capacity of 17,0 Mty from 10.5 Mty, the pR for which was sanctioned by the Govt. --' "c'a ln Sept,, 2009 for an additional capital investment of Rs.1s3.g2 crore up to the 2.2 PROJECT SITE INFORMATION 2.2.1 Location project The Rajmahal opencast coal is located in the Godda District of Jharkhand, lndia, between latitudes 25o !' !2" N & 250 3, 15,, N and longitudes g7o 2L, O" E & g7o 24,0. E. The area is easily accessible, being connected with the Godda-pirpaiti pwD road. The pirpainti nearest ra.ilway station is at on the sahibganj loop ofthe Eastern Railway, about 30 km from the project site. The topography of the area consists of a gently undulating surface, 7b-100 m above sea level, with the highest point, Lalmatia Hill, occurring in the northern part of the area at a height of 204 m above sea rever. Location plan of the Rajmahal OCP is enclosed at Annexure-2. 2.2.2 Climate The area has a mild to moderate and tropical to sub-tropical climate with temperatures varying between 80 c in winter and 490 c in summer.