特厚煤层综采面矿压规律及实测分析

Ground Pressure Law and Actual Measurement Analysis of Fully Mechanized Mining Face in Extra Thick Seam

针对特厚煤层综放面矿压显现规律较为复杂,本文以北辛窑煤矿8405工作面为背景,采用理论计算和现场观测的方法得到了综采面顶板的初次来压步距、周期来压步距,探究了相应的动载系数及初撑力、循环末阻力的相互关系。研究表明:理论计算与现场实测存在较小的偏差,其计算结果可用于指导生产。该研究为类似矿井工作面的矿压规律分析及支护设计提供了有益参考。

In view of the complicated problem of the law of the ground pressure appearance in the fully mechanized top coal caving face of the extra thick seam.Taking the 8405 working face of Beixinyao Coal Mine as the background,the first weighting step distance and periodic weighting step distance of the roof of the fully mechanized face are obtained by theoretical calculation and field observation,and the relationship between the corresponding dynamic load coefficient,the initial bracing force and the end of the loop resistance is explored.The research shows that there is a small deviation between theoretical calculation and field measurement,and the calculation results can be used to guide production.This study provides a useful reference for the analysis of ground pressure law and support design of similar mine working faces.