Research on Initial Mining Pressure Characteristics of Isolated Working Face in Extra-thick Seam
In order to grasp the initial mining pressure characteristics of island working face in extra-thick coal seam,this paper taking the 14203-1 island working face of Zheneng Majialiang Coal Industry of Jinneng Holding Coal Industry Group Co.,Ltd.as the research object,the combination method of microseismic monitoring and numerical simulation was used to research.The monitoring results show that the average range of influence of advanced support pressure on the working face is 252 meters,the average range of rock influence above the coal seam is 111 meters,and the average violent movement of the rock above the roof is 35.5 meters,the average influence range of the coal seam floor is 94 meters,and the average violent movement of the rock below the floor is 44 meters.The monitoring data and numerical simulation have good correspondence and complementarity,which provides technical support for safe and efficient mining.
Extra-thick SeamIsland working faceMine pressure characteristicsMicroseismic monitoring
NETL
NSTL
万方数据
