红庆梁煤矿弱胶结地层煤巷锚网支护研究  

Research on Support of Anchor Net in Weak Cemented Coal Roadway in Hongqingliang Coal Mine

作　　者：张伟[1] 杨富强 蔡来生[1] 张闯 于凤海[3] 李刚[3] 高学鹏 ZHANG Wei;YANG Fuqiang;CAI Laisheng;ZHANG Chuang;YU Fenghai;LI Gang;GAO Xuepeng(Beijing Haohua Energy Resources Company Limited,Beijing 102300,China;Ordos Haohua Hongqingliang Mining Industry Co.,Ltd.,Ordos 014300,China;Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]北京昊华能源股份有限公司,北京102300 [2]鄂尔多斯市昊华红庆梁矿业有限公司,内蒙古鄂尔多斯014300 [3]山东科技大学,山东青岛266590

出　　处：《煤矿安全》2018年第10期45-49,共5页Safety in Coal Mines

基　　金：煤矿安全高效开采省部共建教育部重点实验室开放基金资助项目(JYBSYS2014202)

摘　　要：由于鄂尔多斯红庆梁煤矿3-1煤层顶板岩层胶结性差、强度低、遇水泥化,11301辅助运输巷道存在沿顶掘进初期顶板变形量大、后期顶板表面开裂问题,为了加强巷道稳定性,采用现场调研、室内试验及理论分析方法,分析巷道破坏特征及控制机理,提出沿底掘进留顶煤锚网支护方案,并获得了较好的工程试验效果。研究结果表明:3-1煤层顶板泥质弱胶结软岩强度低、岩层破碎、裂隙发育范围大,沿顶掘进锚网主动支护作用差,导致巷道围岩渐进破坏失稳;煤层弹性模量及强度参数均大于泥岩及砂质泥岩层,能与上覆岩层变形保持一致,提供支撑力,利于发挥岩层自承能力;通过发挥锚索支护、减跨作用,巷道顶板稳定性提高。The roof rock formation of 3-1 coal seam in Hongqingliang Coal Mine in Ordos is poor in cementation, low in strength,and easy to muddy. The 11301 auxiliary roadway has a large amount of deformation of the roof during the early stage of the excavation, and the surface of the roof is cracked at the later stage. In order to strengthen the stability of the roadway, site investigations, laboratory tests and theoretical analysis methods were adopted to analyze the characteristics and control mechanism of the roadway damage, and a support scheme for the top coal retaining nets along the bottom was proposed, and the better effect of the engineering test is obtained. The results show that： the soft mudstone with weak cementation in the roof of 3-1 coal seam has low strength, large area of rock fragmentation and fracture development, and poor active supporting function of anchor net along the top excavation, which leads to the gradual failure and instability of roadway surrounding rocks; the elastic modulus and strength parameters of coal seam are all larger than that of mudstone and sandy mudstone layer, and the top coal can be consistent with the deformation of the overlying strata and provide support force, which is beneficial to the self-bearing capacity of the rock strata; through anchoring, the roof rock integrity is improved, and the soft rock and the top coal are combined to form a composite beam to improve the roof stability.

关 键 词：弱胶结软岩 巷道支护 托顶煤 锚网支护 巷道稳定性 

分 类 号：TD353[矿业工程—矿井建设]