摘要
采用UDEC软件对硬厚顶板条件下潘北矿11313工作面开采时顶底板应力分布和覆岩运移规律进行数值模拟与分析,得出工作面在回采过程中,工作面初次来压步距为52m,周期来压步距为30m;切眼煤柱后方、工作面煤壁前方支承压力也逐渐增大,当推进到一定距离时,支承压力基本保持不变;采场围岩不同层位支承压力峰值位置表现为:底板7m小于底板3m小于顶板9m小于顶板33m。通过现场实测可知,其模拟结果与现场相符合。
UDEC software was used to simulate and analyze the roof and floor stress distribution and movement law of overlying strata for Panbei mine 11313 work face mining under hard and thick roof,during the mining process,the initial weighting step was 52 m,the periodic weighting step was 30m; abutment pressure behind the coal pillar and in front of coal wall gradually increased,and when the working face advanced to a certain distance, the abutment pressure basically remained unchanged; for the field of surrounding rock in different layers of abutment pressure peak position,the roof of33 m was the largest,followed by that of 9m,3m and 7m. According to the field test,the simulation results were in accordance with the field.
出处
《煤炭工程》
北大核心
2016年第12期87-90,共4页
Coal Engineering
关键词
硬厚顶板
数值模拟
围岩运移
采动应力
hard and thick roof
numerical simulation
surrounding rock movement
mining-induced stress
