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Electric Motor-Driven Mine Equipment and Accessories and High-Voltage Longwall Equipment Standards for Underground Coal Mines; Final Rule

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Electric Motor-Driven Mine Equipment and Accessories and High-Voltage Longwall Equipment Standards for Underground Coal Mines; Final Rule Monday, March 11, 2002 Part II Department of Labor Mine Safety and Health Administration 30 CFR Parts 18 and 75 Electric Motor-Driven Mine Equipment and Accessories and High-Voltage Longwall Equipment Standards for Underground Coal Mines; Final Rule VerDate 11<MAY>2000 12:47 Mar 08, 2002 Jkt 197001 PO 00000 Frm 00001 Fmt 4717 Sfmt 4717 E:\FR\FM\11MRR2.SGM pfrm01 PsN: 11MRR2 10972 Federal Register / Vol. 67, No. 47 / Monday, March 11, 2002 / Rules and Regulations DEPARTMENT OF LABOR underground coal mines and allowed the industry’s need for higher voltages the use of high-voltage longwall and the marked improvement in the Mine Safety and Health Administration equipment. However, it did not design and manufacturing technology of specifically focus on the safety issues high-voltage components, MSHA 30 CFR Parts 18 and 75 related to the use of high-voltage developed rules that establish RIN 1219–AA75 longwall equipment. The Agency requirements for safe high-voltage published a new proposed rule (57 FR electric equipment use. This rule Electric Motor-Driven Mine Equipment 39036) on August 27, 1992, related provides improved design requirements and Accessories and High-Voltage specifically to the safe use of high- for longwall equipment, consistent with Longwall Equipment Standards for voltage longwall equipment in existing requirements in 30 CFR part 18, Underground Coal Mines underground coal mines. These rules and contains provisions that also specifically addressed approval accommodate new design technology, AGENCY: Mine Safety and Health requirements for high-voltage electrical are practical, and lessen burdens on the Administration (MSHA), Labor. equipment operated in longwall face mining community, while preserving ACTION: Final rule. areas of underground coal mines. The safety and health protections for miners. comment period on the proposed rule The safety criteria supporting the rule SUMMARY: This final rule establishes was scheduled to close on October 23, are based on research conducted over MSHA’s new mandatory electrical 1992, but was extended to November 13, the past 18 years by the former U.S. safety standards for the installation, use, 1992 (57 FR 48350). On October 18, Bureau of Mines (USBM) and MSHA. and maintenance of high-voltage 1995, (60 FR 53891), MSHA reopened USBM functions are now a part of the longwall mining systems used in the rulemaking record for additional National Institute of Occupational underground coal mines. The final rule comments to the proposed rule to Safety and Health. This research also includes design approval provide all interested parties an included the following: (1) Foster-Miller requirements for high-voltage opportunity to submit additional research, under USBM contract No. equipment operated in longwall face comments. The comment period was H0308093, which developed a areas of underground mines. These scheduled to close on November 14, recommended high-voltage permissible provisions allow the use of high-voltage 1995, but was extended to December 18, loadcenter criteria; (2) MSHA research, longwall face equipment with enhanced 1995 (60 FR 57203). The Agency under USBM contract No. J0333909, safety protection from fire, explosion, received no requests for a public hearing which resulted in modified criteria to and shock hazards. In addition to on the proposed rule. The record was address high-voltage permissible providing a safer mining environment reopened December 28, 1999, for switchgear enclosures and the and facilitating the use of advanced comments on the updated Preliminary development of test facilities for equipment designs, the final rule Regulatory Impact Analysis (PRIA). The acceptance of high-voltage permissible reduces paperwork requirements by record closed February 28, 2000. Only loadcenters and switchgear enclosures; eliminating the need for petitions for one comment was received. The (3) Follow-up MSHA inspections on modification (variances). commenter agreed with our economic high-voltage machines and longwall analysis of the cost impact of the DATES: This regulation is effective May mining systems operating under proposed rule. 10, 2002. The incorporation by reference experimental permits to confirm design These revised standards allow the use of certain publications listed in the rule requirements and operational safety; (4) is approved by the Director of the of high-voltage longwall mining systems. Longwall mining methods have MSHA internal research and review of Federal Register May 10, 2002. engineering reports for further analysis FOR FURTHER INFORMATION CONTACT: undergone numerous advances in technology during the past 25 years. of hazards relating to explosion-proof Marvin W. Nichols, Jr., Director, Office enclosures which contain high-voltage of Standards, Regulations and These technological advances have led to improved and safer systems. The switching; and, (5) Input from various Variances, MSHA, 4015 Wilson additional requirements under 30 CFR technical experts throughout the mining Boulevard, Arlington, Virginia 22203– part 18 provide enhanced safety community. These criteria are 1984. Mr. Nichols can be reached at protections that are consistent with technically sound and have the general [email protected] (Internet advances in mine technology that consensus of the mining community, e-mail), 703—235–1910 (voice), or 703– allows high-voltage switchgear to be including equipment manufacturers and 235–5551 (fax). You may obtain copies used on face equipment. Title 30 CFR other interested parties. of the final rule in alternative formats by parts 18 and 75 of this final rule The first high-voltage longwall system calling this number. The alternative implements a number of changes to started operating in 1985. Since that formats available are either a large print approval and safety requirements for time we have issued approximately 130 version of the final rule or the final rule high-voltage equipment to accommodate system design approvals for high- in an electronic file on computer disk. the advances in technology in a manner voltage longwall equipment. Over the The final rule also is available on the that protects the safety of miners. last 16 years, no electrical-type fatalities Internet at http://www.msha.gov/ or serious injuries occurred to miners REGSINFO.HTM. A. Part 18 Electric Motor-Driven Mine because of high-voltage equipment used Equipment and Accessories SUPPLEMENTARY INFORMATION: in accordance with over 100 granted Electrical equipment horsepower in high-voltage petitions for modification I. Background mines has increased over the years. The (petitions). Because of this new On December 4, 1989, the Mine Safety voltages required to operate this improved high-voltage technology, the and Health Administration (MSHA) equipment have also increased to designed safety benefits and the published a proposed rule (54 FR accommodate the design of practical observed use experience, MSHA is 50062) to revise its electrical safety and efficient equipment. The design of revising its existing 30 CFR part 18 standards for underground coal mines. safe, efficient, and practical high-voltage electric motor-driven mine equipment That proposed rule addressed all of the electric equipment has improved and accessories approval requirements Agency’s electrical standards for dramatically in recent years. Because of by adding specific design requirements VerDate 11<MAY>2000 16:58 Mar 08, 2002 Jkt 197001 PO 00000 Frm 00002 Fmt 4701 Sfmt 4700 E:\FR\FM\11MRR2.SGM pfrm01 PsN: 11MRR2 Federal Register / Vol. 67, No. 47 / Monday, March 11, 2002 / Rules and Regulations 10973 for high-voltage longwall equipment in concerns about explosion, fire and include provisions addressing non- underground mines. shock hazards initially associated with electrical safety and health areas. MSHA received comments from all high-voltage use are sufficiently Specifically, they noted that high- segments of the mining industry, and addressed by this newly-developed voltage longwall systems of extended the final rule addresses these comments. technology. In each of the petition cases widths and lengths can adversely affect Many commenters were in favor of the the Agency granted, MSHA performed a not only ventilation, but shearer new approval requirements and were in specific on-site investigation to verify mounted methane monitors, intake agreement on the majority of the this finding. For example, we escapeways, exposure to respirable dust, provisions in the proposed rule. MSHA recognized that high-voltage electric tailgate travelways, and storage plans for carefully reviewed all of the comments. equipment and circuit design self-contained self-rescuers (SCSR’s), as This resulted in the modification of four improvements in combination with well as return entry rockdusting during of the sixteen technical requirements sensitive electrical circuit protections mining. addressed in the proposed rule. We reduce fire, explosion and shock It is the Agency’s view that non- considered the views of all interested hazards. Newly designed cable handling electrical safety and health issues parties, including: mine operators; systems provide additional safety related to the use of high-voltage equipment manufacturers; miners’ protections against electrical shock, fire longwalls are fully addressed by representatives; and other government and explosion hazards when the cable is existing safety and health standards agencies in developing this final rule. moved. Further, lighter power cables are under
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