长平矿掘进工作面煤体应力分布规律探讨

Discussions on Stress Distribution Rule in Heading Face in Changping Coal Mine

基于对长平矿掘进工作面新鲜暴露煤体前方的应力测定,针对钻屑量能直接反应煤体内应力分布大小的规律,运用岩石力学理论、力学数值模拟及煤层的基本参数,对掘进工作面卸压区宽度进行了理论推导,并对掘进工作面新鲜暴露煤体的钻屑量进行了现场实测。得出了掘进工作面应力分布规律:卸压带宽度约为0～3.5 m,集中应力带宽度约为3.5～8.5 m,8.5 m以后为原始应力区。

This article was based on determination of stress on the fresh exposed coal of the heading face in Changping coal mine.The stress distribution rule inside the coal can be reflected directly from the drilling cuttings quantity.The rock mechanics theory,mechanics numerical simulation and basic parameters of the coal seam were utilized.The pressure relief area width of the heading face was made a theoretic deduction.The drilling cutting quantity of the fresh exposed coal in heading face was measured.The rule of stress distribution on the heading face was drawn as follows：the width of the pressure relief zone was 0 ～ 3.5 m,the width of stress concentration zone was about 3.5 ～ 8.5 m and the width of original stress area was more than 8.5 m.