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32 records found.
Effects of Bolt Spacing, Bolt Length, and Roof Span on Bolt Loading in a Trona Mine
Researchers from the Spokane Research Laboratory of the National Institute for Occupational Safety and Health installed 39 instrumented, fully grouted bolts at six test sites in a trona mine retreat panel to study mine roof stability for the improvement of... Read more
Report of Investigation - Fatal Fall of Roof Accident - Mingo County, West Virginia
What A 35-year old continuous mining machine operator with 16 years of mining experience was fatally injured in a roof fall which occurred at the face of the #4 entry. The fall originated in the unbolted face and continued outby, riding... Read more
Overburden Drill - Mast Access
Problem Maintenance on the Ingersol Rand DMM3 Overburden Drill requires access onto and along the length of the mast. The machine, as supplied, comes with minimal access to the area . . . . Solution The final solution for access includes Australian standard... Read more
Determination of Physical Properties of Cable Bolts in Cement Grout Pull Tests Using Instrumented King Wires
Whereas many researchers and mine engineers have conducted tests using different types of grout, grout ratios, and physical modifications of the cable to determine cable bolt load characteristics, few studies have been conducted on cables fitted with internal instruments. Those... Read more
Procedure for Safe Dogging of Steel Plates to Uneven Surfaces
Problem An inherent problem when performing dogging work is the competing requirements of sufficient weld on the dogging plate or strong back to acommodate the forces exerted by a hydraulic jacking cylinder or wedge and the ability to remove them from... Read more
Uncontrolled Initiation Of A Misfire
What An operator, while scaling with a jumbo, "rattled" into a misfire which had not been detected. The misfire initiated. There were no injuries in this particular incident, but the. Why Failure of workers to identify the butt as a misfire and subsequent... Read more
Powerhouse Ergonomics
Problem A boiler drum is a vessel with an internal height of approximately 1 metre. Attached to the roof and sides of the vessel are scrubbers and cyclones, which require removal for maintenance of the vessel. Whilst the equipment is not... Read more
SAFETY FUSE YELLOW WATERPROOF (WASAG CHEMIE MANUFACTURE)
What An incident of significant potential occurred at an underground gold mine in North Queensland on 6 May 2000, involving the use of safety fuse manufactured by Wasag Chemie. ; A 1.6 metre length of safety fuse, had been capped and... Read more
Development of the load indicator plate
Problem Following an incident in late 1999 when a 1.5 tonne slab of rib coal fell and injured an employee, the subsequent incident investigation identified the fact that the cuttable rib bolts in use at the mine (fibreglass) to support the... Read more
Reduction of manual handling in the Case Shop
Problem In the four furnaces at TEMCO Bell Bay, electrodes 1.2m in diameter and up to 24m in length feed the electrical energy needed to reduce a blend of manganese ore and other raw materials to molten metal alloys. The end... Read more
Surface Nonmetal Mine (Limestone) Fatal Powered Haulage Accident; Mellott Enterprises Inc. (RNF) Warfordsburg, Fulton County, Pennsylvania at New Hope Crushed
What A 38-year-old laborer with 4 years mining experience was fatally injured at a crushed stone operation. The victim and a co-worker were making adjustments to a new conveyor installation. The victim was aligning the extended grease lines for the bend... Read more
Surface Nonmetal Mine (Limestone) Fatal Powered Haulage Accident Mellott Enterprises Inc. (RNF) Warfordsburg, Fulton County, Pennsylvania at New Hope Crushed
What A contract laborer, age 38, was fatally injured when he became entangled in the bend pulley of the gravity take-up system Why The accident occurred because the conveyor had not been de-energized, locked out and tagged prior to performing work on its... Read more
Surface Nonmetal Mine (Sand and Gravel) Fatal Powered Haulage Accident Rattlesnake Pit Darwin Stratton & Son, Inc. Hurricane, Washington County,
What An 18-year-old plant operator with 1 year mining experience was fatally injured at a sand and gravel operation. The victim, who had been operating the plant alone, became entangled in the unguarded tail pulley of the sand washer conveyor. Recommendations Moving machine... Read more
Surface Nonmetal Mine (Sand and Gravel) Fatal Powered Haulage Accident; Rattlesnake Pit; Darwin Stratton & Son, Inc.Hurricane, Washington County, Utah
What A wash plant operator, age 18, was fatally injured when she became entangled in the conveyor belt tail pulley at a sand and gravel operation Why The accident occurred because management had not established procedures that required moving machine parts to be... Read more
Surface Non-Metal Mine (Sand and Gravel) Fatal Powered Haulage Accident Portable #1Tommer Construction Co., Inc.Ephrata, Grant County, Washington
What A 21-year-old oiler with 8 months mining experience was fatally injured at a crushed stone operation. The victim was performing a task underneath a transfer conveyor belt when he was caught between the conveyor belt and a return roller Recommendations Procedures should... Read more
Surface Non-Metal Mine (Sand and Gravel) Fatal Powered Haulage Accident Portable #1Tommer Construction Co., Inc.Ephrata, Grant County, Washington
What A 21-year-old oiler with 8 months mining experience was fatally injured at a crushed stone operation. The victim was performing a task underneath a transfer conveyor belt when he was caught between the conveyor belt and a return roller Why The accident... Read more
Surface Nonmetal Mine (Cement Plant) Fatal Fall of Person Accident CDK Contracting Company (L35) Farmington, San Juan County, New Mexico
What A 50-year-old iron worker (contractor employee) with 36 weeks mining experience was fatally injured at a cement operation. The victim was descending a scaffold ladder when he fell 42 feet to the ground below. Recommendations Cages or equivalent protection should be provided... Read more
Surface Nonmetal Mine (Cement Plant) Fatal Fall of Person Accident CDK Contracting Company (L35) Farmington, San Juan County, New Mexico
What A 50-year-old iron worker (contractor employee) with 36 weeks mining experience was fatally injured at a cement operation. The victim was descending a scaffold ladder when he fell 42 feet to the ground below. Why The accident was caused by the failure... Read more
Analysis of Roof Bolt Systems
A statistical study was conducted of roof bolt performance at a number of mines throughout the U.S. Analysis of the results led to guidelines that can be used to make preliminary estimates of the required bolt length, capacity, and pattern... Read more
Underground Coal Mine Fatal Electrical Accident No. 4 Mackie J Coal Company, Inc. Whitewood, Buchanan, Virginia
What A 43 year old laborer was fatally injured while performing electrical work on the 12,470 volt underground power center located on the 001-0 section. During retreat mining a length of high voltage cable was removed. Problems were encountered with re-energizing... Read more
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