Optimization Analysis of Pillar Position under Inclined Coal Seam Pillar

Abstract:

In order to get reasonable pillar position, this paper researched 20 m inclined pillar abutment pressure spread distribution rule on multiple inclined coal seam roof and floor, based on these lower coal seam have three pillar position can be determined, they were in the central or upside or downside. We are from three aspects to respectively analysis degree of pillar relief, pillars peak pressure concentration factor and pressure spread depth of the floor when pillar layout in different location. The results show that pillar abutment pressure concentration factor along the pillar normal and gravity synthesis direction spread, and with flat oval symmetrical decline distribution on roof and floor, also obtain the upper and lower pillar staggered arrangement is beneficial to the upper pillar pressure relief, at the same time, pillar itself abutment pressure peak coefficient is lower, floor propagation depth is smaller. In short, if the coal seam under inclined pillar want to layout pillars, upside better than downside, and downside is better than vertical, which the result has certain guiding significance for inclined coal seam of reasonable choice pillar position.

• Periodical: Advanced Materials Research (Volumes 734-737)
• Pages: 781-785
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.734-737.781
• Online since: August 2013
• Authors: Xin Jie Liu, Qing Wang, Jin Dai, Yi Fang Fang
• Keywords: Abutment Pressure, Concentration Factor, Inclined Coal Pillar, Optimization

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DOI: 10.1016/j.ijrmms.2008.11.003