倾斜煤层回采巷道断面形状优选及支护研究

Section Shape Optimization and Support Analysis of Mining Roadway in Inclined Coal Seam

为解决香山矿倾斜煤层回采巷道变形复杂、稳定性差、支护难的问题,以香山矿二水平己一采区己_(16-17)倾斜煤层为工程研究背景,通过数值模拟比较分析巷道不同断面形状围岩变形情况,选择合适巷道断面并提出相应的支护方式,结合现场观测以验证选取巷道断面以及支护方式的有效性。结果表明:采用斜顶梯形巷道断面及锚网索支护后巷道顶板最大下沉量与支护前相比降低了19%,两帮最大位移量降低了12.7%,梯形巷道断面支护可以将巷道围岩的变形和破坏控制在较小的范围内,回采巷道变形得到有效控制。研究香山矿倾斜煤层回采巷道稳定性,可为矿井安全生产提供依据。

In order to solve the problem of complex deformation and poor stability of the inclined coal seam roadway in Xiangshan mine,take the inclined coal seam ofⅥ_(16-17) inⅥ1 mining area of 2 level of Xiangshan mine as the background of the engineering research,and analyse the deformation of the surrounding rock in different sections of the roadway through numerical simulation,select the appropriate roadway section and put forward the appropriate support method,and combine with the on-site observation to validate the validity of the selected roadway section and support method.The results show that:after adopting inclined top trapezoidal roadway section and anchor network cable support,the maximum subsidence of the roadway roof is reduced by 19%compared with that before support,and the maximum displacement of two gangs is reduced by 12.7%,and the support of trapezoidal roadway section can control the deformation and damage of the roadway peripheral rock in a small range,and the deformation of the roadway of the backmining has been effectively controlled.The study of the stability of the inclined coal seam roadway in Xiangshan mine can provide a basis for the safe production of the mine.