镇城底矿煤层巷道煤体应力及变形规律研究

 摘要：为分析煤层巷道开挖后两帮煤体应力分布及变形规律，进而确定合理、有效的支护方式，采用弹塑性理论计算以及现场实测相结合的研究方法，以镇城底矿生产实际为背景，理论分析得到该矿煤层巷道两帮煤体的应力分布形式、煤体应力极限平衡区范围；实测分析煤层巷道两帮煤体应力值及巷道围岩收敛变形规律，理论及实测结果较为吻合。得知巷道围岩开挖充分变形后，煤体应力及围岩变形量在实践观测的后期阶段所受煤层采动影响较弱。

The Study on Coal Seam Stress and Deformation Law in Zhenchengdi Seam Roadway

Abstract: In order to analyse the stress distribution and deformation law between roadway’s sides after the roadway excavated, and to determine the reasonable and effective support method, taking the Zhenchengdi actual mine production for background, using the combinational research methods of the elastic-plastic theory and field measurement to calculated the coal seam stress distribution and coal stress limit balance area between roadway’s sides; the measured analysis of the roadway surrounding rock stress and convergence deformation value, the theoretical and measured results are more consistent. The coal seam surrounding rock stress and deformation value observed in the later stages of practice suffered less impact of coal mining after the full deformation of the excavated roadway.