急倾斜煤层巷帮变形失稳数值模拟  

Numerical simulation on instability of roadway rise side in steep coal seam

作　　者：秦涛[1] 刘永立[1] 冯俊杰[2,3] 董长吉[1] 

机构地区：[1]黑龙江科技学院黑龙江省普通高校采矿工程重点实验室,黑龙江哈尔滨150027 [2]中国矿业大学矿业学院,江苏徐州221116 [3]龙煤集团七台河分公司,黑龙江七台河154600

出　　处：《辽宁工程技术大学学报（自然科学版）》2013年第5期582-586,共5页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金资助项目(51074068);教育部科学技术研究重点资助项目(210064);黑龙江省教育厅科研资助项目(1154G16)

摘　　要：为控制新强煤矿急倾斜煤层巷帮变形失稳,采用数值模拟、理论分析和现场试验相结合的方法对急倾斜松软煤层回采巷道围岩变形破坏规律、合理支护方式与支护参数进行研究.研究表明:急倾斜松软煤层两端区是破坏的集中区域,下端头破坏更为剧烈,急倾斜松软煤层巷道的变形与破坏具有非对称性;急倾斜煤层巷道无支护时,巷道冒顶、底鼓、上帮破坏比较严重,而采用锚杆支护后,底鼓是影响上帮稳定性的关键,巷道上帮底角是控制的关键部位.通过数值模拟优化,确定了最终的支护参数,并进行了现场工业性试验,观测结果表明:巷道变形得到了有效控制,取得了较好的支护效果.In order to control the instability of roadway rise moe in steep corn seam m Alllt^l~tll~ lltlll~, u,to IJ~,l.-,~,t studied the laws of roadway surrounding deformation and failure, the reasonable supporting approaches and parameters by means of numerical simulation, theoretical analysis and on-site tests. The study result shows that the damage is severe at both ends of the gob in steep coal seam and the damage at the bottom side is more severe. The deformation and failure is non-symmetry in the roadway within the areas affected by goal. The Roof, floor and rise side of the roadway suffer severe damages without any supports. When supporting with bolts, floor heave becomes the main factor of stability of the roadway rise side. The foot is a critical part of the rise side, and it requires special handling. The final support parameters are determined by numerical simulation and optimization, and are tested on-site. The result of the observation shows that the roadway deformation is controlled effectively, and an improved supporting effect is achieved.

关 键 词：急倾斜煤层 上帮稳定性 数值模拟 煤岩抽冒 锚网支护 分布特征 支护形式 支护参数 

分 类 号：TD353[矿业工程—矿井建设]