RESEARCH ON REASONABLE WIDTH OF PARTITION PILLAR CLOSE TO GOAF HEADING MINING IN THICK SEAM OF DEEP SHAFT
LIU Jinhai1，CAO Yunqin2，WEI Zhenquan2，SHEN Wei2
(1. College of Safety Engineering，North China Institute of Science and Technology，Beijing 101601，China； 2. Tianchen Mine，Shandong Energy Zaozhuang Mining Group Co.，Ltd.，Zaozhuang，Shandong 277500，China)
Abstract：Setting reasonable partition pillar is a key to ensuring safe mining of working face heading the goaf in thick seam of deep shaft. Taking determining the width of partition pillar close to 7108 goaf heading mining of LW7110 in Tianchen Mine as the engineering background，the mechanism of the goaf heading mining inducing rock burst and the reasonable width of partition pillar were studied through theoretical analysis，numerical modeling and field monitoring. The following conclusions were obtained. (1) The evolution process of overlying strata spatial structure during LW7110 mining heading the goaf is described as “the fixed S-shaped，the moving S-shaped，the connected S-shaped，the C-shaped and the U-shaped”，and the evolution process of partition pillar stress is described as “the fixed abutment pressure，the moving abutment pressure，the stress superposition and the stress concentration”. (2) The mechanism of rock burst induced by the goaf heading mining is described as the vertical stresses in the partition pillar reaches impact stress condition because of stress concentration. (3) Under the premise of implementing stress relief around the pillar，the reasonable width of partition pillar close to 7108 goaf heading mining is 65 m. Furthermore，the reasonableness of the partition pillar width was verified with a good result. The results can provide a reference for prevention of rock burst induced by mining engineering.
刘金海1，曹允钦2，魏振全2，沈 伟2. 深井厚煤层采空区迎采动隔离煤柱合理宽度研究[J]. 岩石力学与工程学报, 2015, 34(S2): 4269-4277.
LIU Jinhai1，CAO Yunqin2，WEI Zhenquan2，SHEN Wei2. RESEARCH ON REASONABLE WIDTH OF PARTITION PILLAR CLOSE TO GOAF HEADING MINING IN THICK SEAM OF DEEP SHAFT. , 2015, 34(S2): 4269-4277.
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2015, Vol. 34 
