DETERMINATION OF REASONABLE ROADWAY POSITION DURING EXTRACTION OF CLOSED COAL SEAM BASED ON ENERGY THEORY
WANG Hongwei1，2，JIANG Yaodong1，2，ZHAO Yixin1，2，WANG Tao1，YANG Tian1，NING Taohong1
(1. School of Mechanics and Civil Engineering，China University of Mining and Technology，Beijing 100083，China；2. State Key Laboratory of Coal Resources and Safe Mining，China University of Mining and Technology，Beijing 100083，China)
Abstract：Due to the stress concentration of coal pillar arranged in the upper coal seam during the extraction of closed coal seam，the accumulated energy in coal pillar could induce coal bump in the mining face and roadway if the position of roadway was unreasonably arranged and designed. Based on the geological condition of No.2 coal mining in Anjialing，the physical model was established to determine the energy release in coal pillar during extraction of closed coal seam and investigate the reasonable position of mining roadway in the under coal seam. It was suggested from the physical model and field test that degree of energy release during the extraction of under coal seam was greater than that of upper coal seam. The reason was that the stress concentration of coal pillar induced by the movement of overlying rock strata was serious during the extraction of under coal seam. The physical model revealed that the reasonable distance between roadway and coal pillar was approximate greater than 8 m. The field test results obtained from roadway displacement and the geological radar suggested that the roadway was stable when the reasonable distance was greater than 8 m.
王宏伟1，2，姜耀东1，2，赵毅鑫1，2，王 涛1，杨 田1，甯桃红1. 基于能量法的近距煤层巷道合理位置确定[J]. 岩石力学与工程学报, 2015, 34(S2): 4023-4029.
WANG Hongwei1，2，JIANG Yaodong1，2，ZHAO Yixin1，2，WANG Tao1，YANG Tian1，NING Taohong1. DETERMINATION OF REASONABLE ROADWAY POSITION DURING EXTRACTION OF CLOSED COAL SEAM BASED ON ENERGY THEORY. , 2015, 34(S2): 4023-4029.
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2015, Vol. 34 
