近距离煤层下回采巷道支护技术  

Mining roadway supporting technology under close distance coal seams

作　　者：南存全[1] 王玉成[1] 商佳新 于永江[1] 

机构地区：[1]辽宁工程技术大学矿业学院,辽宁阜新123000 [2]中煤平朔集团有限公司井工二矿,山西朔州036000

出　　处：《辽宁工程技术大学学报（自然科学版）》2015年第5期550-554,共5页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金项目(51174106)

摘　　要：针对近距离煤层群联合开采,上层煤采完后,下层煤巷道支护困难的问题.运用有限差分数值软件FLAC2D,对下层煤巷道在无支护裸巷、常规锚杆(索)支护和桁架锚索支护三种方式下巷道围岩顶板最大下沉量、塑性屈服范围、应力场,进行了数值模拟分析,并进行现场工程验证.结果表明:桁架锚索支护可以有效控制巷道围岩变形,保持巷道稳定.该成果对近距离煤层下回采巷道研究有一定实际价值.Aiming at the problem that supporting in the roadway of low coal seam is difficult when the above coal seam of close distance coal seam group is mined, this paper put forward truss cable supporting mode. By using finite difference numerical simulation software FLAC^2D, this study simulated and analyzed the roof largest deflection, plastic yield range, stress field of the deformation of roadway roof under the three supporting modes of unsupported, common cable and truss cable supporting, and also performed the engineering verification on the site. The result indicates that truss cable supporting mode not only can effectively control deformation of surrounding rock, but also can guarantee safe production of mine.

关 键 词：近距离煤层 FLAC2D 无支护裸巷 常规锚杆(索) 桁架锚索 

分 类 号：TD353[矿业工程—矿井建设]