缓倾斜煤层综采工作面覆岩运动规律及矿压特征分析

Analysis of overburden movement law and ore pressure characteristics of the fully mechanized mining face of gentle inclined coal seam

为了解李雅庄煤矿2-611综采工作面上覆岩层的运动规律,从而实现采取更有效措施控制围岩变形,利用UDEC数值模拟软件对2-611工作面回采时上覆岩层的运动情况进行模拟分析,模拟结果与矿压监测所得的结果基本一致。结果表明:工作面初次来压步距为15m,周期来压步距为10m,由于上覆岩层松软,“短砌体梁”滑落失稳致使周期来压强度高,来压步距短。

In order to understand the movement law of overburden strata on the 2-611 comprehensive mining face of liyazhuang coal mine,and to control surrounding rock deformation by more effective measures,the movement of overburden strata during mining in the 2-611 working face is simulated and analyzed with UDEC numerical simulation software,and the simulation results are basically consistent with the results obtained from mine pressure monitoring.The results show that the first pressure step distance of working face is 15m,and the periodic pressure step distance is 10m.As the overburden layer is soft,the "short masonry beam" slips and loses stability,resulting in high pressure strength and short pressure step distance.