采动影响下窄煤柱沿空掘巷支护技术研究  

Research on supporting technology of narrow coal pillar along goaf under mining influence

作　　者：张志青 王国龙 康健婷[3] 

机构地区：[1]中铁十二局集团第二工程公司,山西太原030032 [2]山西朔州平鲁区茂华万通源煤业有限公司,山西朔州036800 [3]太原理工大学,山西太原030024

出　　处：《煤炭工程》2016年第2期83-86,共4页Coal Engineering

摘　　要：针对采动影响条件下孤岛工作面窄煤柱沿空掘巷围岩变形破坏严重的问题,分析了此类地质条件下围岩控制机理及支护对策,指出顶板和煤柱帮是围岩控制的关键,针对性的提出了锚杆钢带组合、锚索槽钢梁组合的锚索网支护方案,采用离散元软件UDEC3.1对锚网索支护参数的合理性进行了分析,并在顾北煤矿1322运输巷进行了工业性试验,结果表明,1322运输巷采用该技术支护稳定后,距离掘进头300m处顶底板移近量为454mm,两帮移近量为343mm,巷道未出现大的围岩变形,窄煤柱较稳定,总体支护效果较好,达到了安全生产的要求。Aiming at the great surrounding rock deformation and failure in gob side roadway tunneling with narrow coal pillar in island working face under mining influence, the paper analyzes the surrounding rock control mechanism and support measures in such geological conditions,points out that roof and coal pillar rib is the key for surrounding rock control. A bolt- cable- mesh support scheme is proposed,including bolt- steel strip combination,and cable- channel beam combination. The rationality of supporting parameters is analyzed using the discrete element software UDEC3. 1,and the result is verified through industrial test in 1322 transportation roadway. The results show that,with application of the proposed technology,the roof- to- floor convergence is 454 mm at 300 m from heading end,the two- side convergence is343 mm,no major roadway surrounding rock deformation occurs,and narrow coal pillar is stable,the overall supporting effect is favorable,the roadway safety requirements are satisfied.

关 键 词：采动影响 窄煤柱 沿空掘巷 锚网索支护 数值模拟 

分 类 号：TD353[矿业工程—矿井建设]