大采高工作面矿压规律分析

Analysis of Strata Behavior Law at Large-mining-height Working Face

为实现游仙山矿大采高综采工作面的安全回采,采用现场观测和理论计算的方法在15210工作面进行了大采高综采工作面矿压规律的分析。基于工作面矿压观测结果,工作面来压强度较小,端面失稳主要表现为煤壁片帮。通过对锚索受力进行分析,工作面的超前支承压力影响范围为37.8~46.5 m,其中前方17.6 m为剧烈影响区。结合理论计算结果,得到工作面的初次来压步距为31.7 m,周期来压步距为17.6 m。

In order to realize the safety mining at large-mining-height fully-mechanized working face in Youxianshan Colliery,the author makes an analysis of the strata behavior law at 15210 working face by means of field observation and theoretical calculation,in which the pressure strength of the working face is small,and the end face instability is mainly characterized by coal wall rib spalling;the influence range of advanced abutment pressure is 37.8~46.5 m with the severe influence area 17.6 m ahead through the analysis of anchor cable stress while the theoretical calculation results show the first weighting step is 31.7 m and the periodic weighting step is 17.6 m.