Assessment of roof fall risk during retreat mining in …
One of the most challenging safety problems in room and pillar coal mines is roof fall phenomena during retreat mining. Roof fall not only causes fatal and non-fatal injuries on miners, stoppages in mining operations and equipment breakdowns, but also results in inefficient recovery of ore reserves.
Assessment of roof fall risk during retreat mining in …
Read "Assessment of roof fall risk during retreat mining in room and pillar coal mines, International Journal of Rock Mechanics and Mining Sciences" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.
Research Report on the Coal Pillar Recovery under Deep Cover
University (WVU), a study of the recovery of coal pillars through retreat room-and-pillar mining practices in underground coal mines at depths greater than 1,500 ft. The study should examine the safety implications of retreat room-and-pillar mining practices, with emphasis on the impact of full or partial pillar extraction mining.
COAL MINER’S HANDBOOK FOR ROOF AND RIB CONTROL
Room and Pillar Retreat Mining From January 2000 through December 2007, falls of roof or rib (including coal outbursts) accounted for 59 fatalities in underground coal mines. Nineteen of these 59 fatalities (32%) occurred during room-and-pillar retreat mining …
CDC - Mining Feature - Retreat Mining Safety - …
According to initial reports, the two men were killed during a coal burst—a sudden outburst of coal and rock caused by the rupture of a supported roof, coal pillar, or wall. The Brody Mine was engaged in retreat mining, which is a common practice in U.S. coal mines, particularly for mines located in the central Appalachian coalfields of ...
Room and pillar mining - Wikipedia
Room and pillar mining was one of the earliest methods used, although with significantly more man-power. The room and pillar system is used in mining coal, gypsum, iron, and uranium ores, particularly when found as manto or blanket deposits, stone and aggregates, talc, soda ash and potash.
Optimization of room-and-pillar dimensions using …
Room-and-pillar (R&P) mining is a method of extracting a series of rooms (i.e., long horizontal openings) while leaving behind pillars of ore, rock, or coal. In hard rock masses, pillar widths are smaller than entry widths. Pillars can be constituted solely of ore or of ore and waste when the ore body is thin.
Farhang Sereshki - Google Scholar Citations
Their combined citations are counted only for the first article. ... Assessment of roof fall risk during retreat mining in room and pillar coal mines. E Ghasemi, M Ataei, ... Prediction of the confidence interval for stability analysis of chain pillars in coal mines. M Najafi, SE Jalali, ARY Bafghi, F Sereshki. Safety science 49 (5), 651-657 ...
Stability Mapping to Examine Ground Failure Risk: A Field ...
Stability Mapping to Examine Ground Failure Risk: A Field Study at a Limestone Mine T. S. Bajpayee ... of roof fall injuries in stone mines during this period (MSHA, 2009). ... The mine is extracting limestone using the room‑and‑pillar
Sizing of Final Stumps for Safer Pillar Extraction
SIZING OF FINAL STUMPS FOR SAFER PILLAR EXTRACTION Christopher Mark, Chief, Rock Mechanics Section ... It seems that the risk of major pillar falls can often be reduced by ... “Room and Pillar Retreat Mining, A Manual for the Coal Industry” (6).
Major Hazard Risk Assessment Applied to Pillar Recovery ...
Major Hazard Risk Assessment Applied to Pillar Recovery Operations A.T. Iannacchione, Associate Professor University of Pittsburgh Pittsburgh, PA Chris Mark, Principal Research Engineer NIOSH Pittsburgh Research Laboratory Pittsburgh, PA. ABSTRACT . Recent fatal injuries occurring during pillar retreat coal mining
Ebrahim Ghasemi - Google Scholar Citations
Assessment of roof fall risk during retreat mining in room and pillar coal mines. E Ghasemi, M Ataei, ... A new coal pillars design method in order to enhance safety of the retreat mining in room and pillar mines. E Ghasemi, K Shahriar. Safety science 50 (3), 579-585, 2012. 38: ... Prediction of roof fall rate in coal mines using fuzzy logic.
Hello, what is the difference between area of …
Hello, what is the difference between area of exposure and area of roof exposure in underground coal mines could anyone please help ?
Preventing roof fall fatalities during pillar recovery: …
For decades, pillar recovery accounted for a quarter of all roof fall fatalities in underground coal mines. Studies showed that a miner on a pillar recovery section was at least three times more likely to be killed by a roof fall than other coal miners.
Coal mining - Wikipedia
Most coal seams are too deep underground for opencast mining and require underground mining, a method that currently accounts for about 60 percent of world coal production. In deep mining, the room and pillar or bord and pillar method progresses along the seam, while pillars and timber are left standing to support the mine roof. Once room and pillar mines have been developed to a stopping ...
Mohammad Ataei - نقلقولهای Google Scholar
Assessment of roof fall risk during retreat mining in room and pillar coal mines E Ghasemi, M Ataei, K Shahriar, F Sereshki, SE Jalali, A Ramazanzadeh International Journal of Rock Mechanics and Mining Sciences 54, 80-89 , 2012