大采高综采工作面矿压显现规律及支架适应性研究

通过理论分析和现场数据观测,对察哈素煤矿3101大采高综采工作面矿压显现规律进行了深入研究。针对大采高条件下支架的受力和工作状况,对掩护式支架的适应性进行了分析。实际测量工作面初次来压步距为36.7m,动载系数为1.47;周期来压步距为15.03m,动载系数为1.44,且工作面中部区域来压较两侧区域有明显时间差。统计数据显示,支架工作阻力基本呈正态分布,支架初撑力和末阻力总体呈线性增阻关系,目前使用支架(ZY12000/28/63)能够基本满足现场支护要求。

Research on Behavior of Mine Pressure and the Suitability of Hydraulic Supports in Mechanized Coal Face of Large Mining Height

By theoretically analyzing and contrasting with field measurement data, the strata behaviors of the 3101 fully-mechanized working face with large mining height in Chahasu coal mining was deeply studied.The stress and working conditions of shield powered supports with large mining height was discussed, and the adaptability of the supports is analyzed. The field observation results shows that the first weighting was 36.7m,dynamic load factor was 1.47; periodic weighting was 15.03m and its dynamic load factor was 1.44. Besides, There was a obvious time difference between mid-area and either sides of working face.The statistics showed the distribution frequency of supports’ working resistance was basically in normal, and has proved the linear increasing resistance relationship between setting load and the supports resistance towards a mining cycle end.And the supports used at present (ZY12000/28/63) can meet the demands of working face pressurization behavior. The study results could provide the references to supports choice and the safety and high efficient mining of coal mining face under the similar conditions．