【摘要】 煤矿开采进入深部以后,地质力学环境远比浅部复杂得多,由此引起的各种非线性力学现象越来越严重,给深部支护与开采带来很大的难度。夹河矿2442工作面上材料道复合顶板松散、破碎,采用原支护形式很难有效控制,进而加剧两帮收缩和底板臌起,严重影响巷道的正常掘进和安全生产。通过对该巷道工程地质条件的综合分析和地质力学评估,采用数值模拟和理论分析方法研究该类巷道的变形破坏机制,有针对性地提出锚网索耦合支护设计方案,现场试验结果表明该支护设计方案可取得良好的支护效果。更多还原

【Abstract】 As the mining depth increasing,geological and mechanical conditions of roadway become more complicated compared with those in shallow roadway.Consequently,the nonlinear mechanical phenomena occur with high frequency,which brings about great difficulties for deep engineering support during excavation and mining.These problems caused by the deep mining engineering are the focuses in the fields of mining engineering and rock mechanics.A lot of achievements have been obtained by scholars through theoretical study,experimental test,and in-situ test.The loose and cracked compound roof of working face 2442 in Jiahe Coal Mine is difficult to control by using traditional support measures which increase the walls shrink and the floor heave and greatly affect the normal excavation and safe production.Based on the in-situ investigation,experimental test,analysis of engineering geological conditions,geomechanical evaluation and numerical simulation,the deformation and damage mechanisms of the roadway are analyzed;and then the bolt-mesh-cable coupling support design is put forward.The result of in-situ test shows that the new design can ultimately guarantee the stability of deep coal gateway.The design scheme of bolt-mesh-cable coupling support is feasible and efficient for the stability control of surrounding rock in deep mining engineering.更多还原