大倾角“三软”煤层巷道关键部位强化支护技术研究  

Enhanced support technology for key area of the roadway in large inclined angle “three-soft” coal seam

作　　者：王旭锋[1] 汪洋[1] 张东升[1] 

机构地区：[1]中国矿业大学矿业工程学院,江苏省矿山地震监测工程实验室,江苏徐州221116

出　　处：《采矿与安全工程学报》2017年第2期208-213,共6页Journal of Mining & Safety Engineering

基　　金：国家重点基础研究发展计划(973)项目(2015CB251600);国家自然科学基金项目(51474206,51404254);江苏省基础研究计划项目(自然科学基金)(BK20150051);江苏高校优势学科建设工程项目

摘　　要：大倾角"三软"煤层回采巷道围岩变形严重、支护难度普遍较大,为提高此类巷道的围岩控制效果,通过建立巷道围岩力学模型,对巷道顶板、两帮、底板岩层受力情况进行了系统分析,确定了围岩变形的关键部位及主要影响因素,结合复合顶板巷道不同层位组合抗弯强度变化特征,分析了巷道关键部位强化支护机理,提出了"强帮固顶、强顶护帮"的联合支护技术思路与方案。工程实践表明,大倾角"三软"煤层回采巷道在层位选择合理的情况下,通过采用关键部位强化支护技术,能有效提高巷道整体承载能力,巷道围岩变形量减少80%以上,效果显著。In large-inclined-angle ＂three-soft＂ coal seam, the severe deformation in the surrounding rock of roadway made support more difficult. In order to improve the control effect of this kind of roadway surrounding rock, a mechanical model of the roadway surrounding rock was established, through which the stress of roof, two sides and floor of the roadway was analysed systematically, and the key parts and main factors affecting surrounding rock deformation were determined. Combined with the change characteristics of bending strength in different layer combination in the roadway with com- posite roof, the enhanced supporting mechanism of the key parts of the roadway was analyzed, and the combined support technology ideas of ＂strengthening-sides-reinforcing-roof and strengthen- ing-roof-protecting-sides＂ was put forward. The engineering practice has shown that the application of the enhanced support technology in key parts with rational layer selection effectively and significantly improves the overall carrying capacity of roadway in large-inclined-angle three-soft coal seam, and the roadway surrounding rock deformation is reduced by more than 80%.

关 键 词：大倾角 “三软”煤层 层位选择 联合支护 

分 类 号：TD353[矿业工程—矿井建设]