Assessment Of Roof Fall Risk During Retreat Mining In Room And Pillar Coal Mines

Analysis of retreat mining pillar stability (Conference ...

Preventing pillar squeezes, massive pillar collapses, and bumps is critical to the safe and efficient recovery of coal during room-and-pillar retreat mining. To help prevent these problems, the U.S. Bureau of Mines (USBM) has developed the Analysis of Retreat Mining Pillar Stability (ARMPS) computer program.

Coal mining - Wikipedia

Once room and pillar mines have been developed to a stopping point (limited by geology, ventilation, or economics), a supplementary version of room and pillar mining, termed second mining or retreat mining, is commonly started. Miners remove the coal in the pillars, thereby recovering as much coal from the coal seam as possible.

RAPM - Room And Pillar Mine | AcronymAttic

Risk Assessment Process Leader; ... 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... 2014 Coal Pillar Design Like many other structural design problems, ...

Geodetic Monitoring of the Surface within the Trial ...

The task of the trial operation is to prove the usability of this method of mining in the conditions of deep bituminous coal mines of the Ostrava-Karvina Coal District. ... A. (2012) Assessment of Roof Fall Risk during Retreat Mining in Room and Pillar Coal Mines. ... State Monitoring of Coal Pillars during Room and Pillar Extraction. ...

Ghasemi, E., Ataei, M., Shahriar, K., Sereshki, F., Jalali ...

Assessment of roof fall risk during retreat mining in room and pillar coal mines. International Journal of Rock Mechanics and Mining Sciences 54, 80-89. Journal Papers

Publications | Dr.Ebrahim Ghasemi

Assessment of roof fall risk during retreat mining in room and pillar coal mines. International Journal of Rock Mechanics and Mining Sciences 54, 80-89. November : 2012 : Ghasemi, E., Shahriar, K., Sharifzadeh, M., 2010. A new method for risk assessment of pillar recovery operation. Safety Science 48, 1304-1312. April

FIELD ASSESSMENT OF SIU ENGINEERED WOODEN CRIBS IN ...

used to provide supplemental roof support in longwall and room-and-pillar mining areas of underground mines. The ATLAS crib element achieves improved properties of strength, stiffness, and yield while using approximately one-third less wood, weighing about 40 percent less, and offering less ventilation resistance than a conventional crib element.

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.

coal mine roof fall afrter pillaring - YouTube

May 02, 2012· this is what happens after the pillars have been removed. A normal day at work for a coal miner .

Assessment of roof fall risk during retreat mining in room ...

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.

CDC - Mining Feature - Retreat Mining Safety - NIOSH

May 20, 2014· 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 ...

(PDF) Numerical analysis of underground space and pillar ...

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 ...

Ebrahim Ghasemi - Google Scholar Citations

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

Retreat Mining, Room and pillar mining, Underground Mining ...

Retreat Mining. Retreat mining is the last phase of a general kind of coal mining technique referred to as room and pillar mining. In room and pillar mining a mining machine called as "continuous miner" bores a network of chambers or "rooms" into a coal seam, leaving at the back an unexcavated pillar of coal in every room to support the roof of the mine.

Rib/snook design in mechanised depillaring of rectangular ...

A field study at different mechanised depillaring (MD) operations in Indian coalfields (with depth ranging from 60 to 377 m and caveability Index variation from 2300 to 10500) found mixed performances of adopted sizes of the ribs/snooks. Formation of an irregular shaped rib/snook during MD of the existing square/rectangular pillars by a continuous miner and uniqueness of the existing geo ...

STABILITY ANALYSIS AND FEASIBILITY OF PILLAR RECOVERY ...

In 2012, Ghasemi et al., presented an article entitled “assessment of roof fall risk during retreat mining in room and pillar coal mines”. In that paper, at first all parameters affecting on the roof falling during retreat mining have been identified and the role of …

The Duncan Method of Partial Pillar Extraction at Tasman …

The Duncan Method of Partial Pillar Extraction at Tasman Mine Kent Tyler Donaldson Coal Pty Ltd, Australia ... Underground Coal Mines (NSW Dept. Primary Industries, 1992) were followed as the mine layout and ... Pillars within the panel are stripped on four sides during panel retreat and the barrier pillar is also stripped (Figure 4). ...

Microseismic Monitoring of a Room and Pillar Retreat Coal ...

underground coal mines across the United States (Figure 1). Figure 1: Injuries (FAT, NFDL, NDL) due to the fall of a roof or rib between 2006 and 2012 (MSHA, 2015). Commonly accepted mining methods, such as longwall and room and pillar retreat, allow overburden to cave. This creates highly variable stress conditions that can be difficult to ...

Fuzzy Bayesian Network Model for Roof Fall Risk Analysis ...

for assessment and control of the roof fall risk during retreat mining in room and pillar coal mines. Razani et al.13 applied a Fuzzy Inference System (FIS) to predict roof fall rate for controlling, mitigating and/or even eliminating the risk of roof fall. Gao et al.14 presented a numerical approach to simulate shear failure of a coal mine ...

An Approach for Understanding and Promoting Coal Mine ...

E. Ghasemi, M. Ataei, K. Shahriar, F. Sereshki, S. E. Jalali, and A. Ramazanzadeh, “Assessment of roof fall risk during retreat mining in room and pillar coal mines,” International Journal of Rock Mechanics and Mining Sciences, vol. 54, pp. 80–89, 2012. View at Publisher · …

(PDF) Geologic hazards in coal mining: Prediction and ...

In 1907, 3242 miners 2004), and possibly higher (Congressional Executive were killed in United States coal mines (Mine Safety Commission on China, 2004); many from geologic and Health Administration, 2004), and 449.23 Mt of hazards such as methane explosions and roof falls. coal were produced (Milici, 1997), a fatality rate of Ukraine has a ...

Developing and following a mining plan, and using ...

Developing and following a mining plan, and using equipment properly could reduce miner exposure to ground falls BY CHRISTOPHER MARK AND JOSEPH C. ZELANKO During August, two eastern Kentucky coal miners died in a roof fall during retreat mining operations. They had just finished extracting one pillar block and were moving to the next

Significance of Strata Monitoring Instruments in Roof Fall ...

Significance of Strata Monitoring Instruments in Roof Fall Risk Assessment of an Underground Coal Mine Deepak V.Walke, Research fellow and Dr R.R. Yerpude, Assistant Professor Department of Mining Engineering, Visvesvaraya National Institute of Technology, Nagpur (M.S.), India. Abstract: This paper refers to the role of strata

Assessment and management of roof fall risks 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 ...

Coal mining trends, approaches, and safety hazards: a ...

Ghasemi E, Ataei M, Shahriar K, Sereshki F, Jalali SE, Ramazanzadeh A (2012) Assessment of roof fall risk during retreat mining in room and pillar coal mines. Int J Rock Mech Min Sci 54:80–89 CrossRef Google Scholar

(PDF) Assessment of roof fall risk in longwall coal mines

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 ...

Farhang Sereshki - Google Scholar Citations

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

Roof Falls: An Inherent Risk In Underground Coal Mining

The occurrence of rock falls in underground coal mines entails detrimental effects as fatal or non-fatal injuries on workers, stoppages in mining operations and breakdown of equipment. In this paper, a risk assessment approach on the basis of a decision analysis trend is employed in order to assess the possibility of and manage roof falls.

Research Report on the Coal Pillar Recovery under Deep Cover

RESEARCH REPORT ON THE COAL PILLAR RECOVERY UNDER DEEP COVER ... there has been one fatal roof fall during retreat mining, compared to an average of two per year during the previous decade. ... underground coal mines where retreat mining in room-and-pillar operations is utilized.