特厚煤层孤岛工作面初采矿压特征研究

Research on Initial Mining Pressure Characteristics of Isolated Working Face in Extra-thick Seam

为了掌握特厚煤层孤岛工作面初采矿压特征,以晋能控股煤业集团浙能麻家梁煤业有限公司14203-1孤岛工作面为研究对象,采用微震监测和数值模拟相结合的方法进行了研究。监测结果:工作面超前支承压力影响范围平均为252 m,煤层上方岩影响范围平均为111 m,其中岩层剧烈运动在顶板上方平均35.5 m,煤层底板影响范围平均为94 m,其中岩层剧烈运动在底板下方平均为44 m。监测数据与数值模拟具有良好的对应性及互补性,为安全高效开采提供了技术支撑。

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.