郑州矿区“三软”煤层锚网支护技术研究与应用  

Bolt-mesh supporting for“three soft”coal seams in Zhengzhou mining area

作　　者：付建华 王登科[1] 王建伟[2] 魏强 曾凡超 FU Jian-hua;WANG Deng-ke;WANG Jian-wei;WEI Qiang;ZENG Fan-chao(School of Safety Science and Engineering,Henan Polytechnic University,Jiaozuo 454000,China;Zhengzhou Coal Industry(Group)Corporation Limited Liability Company,Zhengzhou 450000,China)

机构地区：[1]河南理工大学安全科学与工程学院,河南焦作454000 [2]郑州煤炭工业(集团)有限责任公司,河南郑州450000

出　　处：《煤炭工程》2021年第3期68-72,共5页Coal Engineering

基　　金：河南省科技创新领军人才计划(204200510032);河南理工大学杰出青年基金(J2018-1)。

摘　　要：针对郑州矿区“三软”煤层煤巷支护技术难题,阐释了“三软”煤层的赋存特征和形成原因,分析了三软煤巷支护失稳因素,并基于组合拱梁原理揭示了锚杆支护的作用机理,提出煤层锚固性能、锚杆预紧力、护表强度、快速安装工艺和及时支护是“三软”煤层锚网支护的关键技术。在此基础上,结合超化煤矿22011A运输巷地质条件,进行三软特厚煤层锚网支护技术设计,现场试验结果表明:该巷道从掘进开始到回采结束,巷道顶板离层浅基点和深基点下沉量最大值分别为48mm和52mm,顶底板和两帮相对移近量值最大值分别为372mm和310mm,有效保证了巷道的支护断面,支护效果良好。Aiming at difficulties for coal roadway supporting in three soft coal seams of Zhengzhou mining area,occurrence characteristics and formation mechanism of three soft coal seam is explained,and the causes for supporting instability in three soft coal roadway is analyzed.The mechanism of bolt support is revealed based on the principle of composite arch beam,and it’s proposed that,coal seam bolt performance,bolt preload,mesh strength,quick installation process and immediate support are the key for three soft coal roadway supporting.On this basis,the thick coal seam bolt-mesh supporting is designed for 22011A coal face transport roadway of Chaohua Coal Mine.The result shows that maximum roof separation at shallow and deep basis points are 48mm and 52mm,the maximum roof-to-floor and side-to-side convergence are 372mm and 310mm,the supporting section of roadway is maintained.

关 键 词：“三软”煤层 锚网支护 失稳机理 树脂锚杆 巷道支护 

分 类 号：TD353[矿业工程—矿井建设]