赵固二矿11050工作面矿压显现与覆岩移动规律

Strata Behaviors and Overburden Movement Law of 11050 Working Face No.2 Coal Mine of Zhaogu LI Junfeng

为研究赵固二矿深埋煤层在上覆薄基岩条件下的工作面矿压显现规律,以赵固二矿11050工作面为研究对象,采用相似模拟和现场实测相结合的方法,得到不同采高条件下工作面的矿压显现规律。研究结果表明,采高为3.5 m时,基本顶的初次来压步距为32 m,周期来压步距为10.4m,覆岩破坏高度为172.8 m;采高为6 m时,基本顶的初次来压步距为35 m,周期来压步距为16.6 m,覆岩破坏高度为143 m。根据支架工作阻力分析得到,工作面的周期来压步距为19.3 m,工作面中部矿压显现更剧烈,来压强度大时,煤壁片帮和冒顶较为严重。研究结论为赵固二矿煤层矿压治理提供指导。

In order to study the strata behaviors of the deep buried coal seam in ZhaoguNo.2 Mine under the condition of overlying thin bedrock,the 11050 working face in ZhaoguNo.2 Mine was taken as the research object.The method of combining similarity simulation and field measurement is used to obtain the rock pressure behavior rules of working faces under different mining height conditions.The research results show thatwhen the mining height is 3.5 m,the initial weighting step of the basic roof is 32 m,the periodic weighting step is 10.4 m,and the overburden failure height is 172.8 m.When the mining height is 6m,the initial weighting step of the basic roof is 35 m,the periodic weighting step is 16.6m,and the overburden failure height is 143 m.According to the analysis of the working resistance of the support,the periodic weighting step of the working face is 19.3 m,and the rock pressure in the middle of the working face appears more intense.When the weighting strength is high,coal wall spalling and roof fall are more serious.The research conclusions provide guidance for the control of coal seam pressure in ZhaoguNo.2 Mine.