黑龙江科技学院学报2013，Vol.23Issue(2)：149-153,5.DOI:10.3969/j.issn.1671-0118.2013.02.010
大强煤矿深井软岩马头门支护技术
Support technology designed for soft rock in deep coal in Daqiang coal mine
摘要
Abstract
This paper introduces the numerical calculation of traditional support using FLAC3D finite difference program, conditioned by its engineering geological conditions and surrounding rock characteristics occurring in the auxiliary shaft ingate chamber of Daqiang coal mine. The result shows that conventional support form, a combination of spray anchor net, anchor rope, and ordinary concrete, results in significant deformation of surrounding rock, greater stress concentration, and overall instability of surrounding rock of chamber, as in the case of shaft ingate chamber of Daqiang coal mine. The solution follows from an analysis of the failure mechanism of ingate chamber, combined with soft rock engineering mechanics theory and indoor physical and chemical test results and the development of the mechanical control countermeasures marked by the combined application of the constant-resistance large deformation bolt-net-anchor, bottom corner anchor, and flexible layer truss coupling support. The practice shows that the new support technology affords an effective control of large deformation of the ingate chamber in deep soft rock, yields a better support effect, and promises a wider application.关键词
深井软岩/马头门/支护技术/恒阻大变形锚杆/数值分析Key words
deep soft rock/ ingate/ support technology/ constant resistance large deformation anchor/ numerical analysis分类
矿业与冶金引用本文复制引用
张晓宇,何满潮,窦世卿..大强煤矿深井软岩马头门支护技术[J].黑龙江科技学院学报,2013,23(2):149-153,5.基金项目
黑龙江省教育厅科学技术研究项目(11544043) （11544043）
