马脊梁矿综放工作面临空巷道围岩变形特征及控制  

Surrounding Rock Deformation Characters and Control of Gob-side Entry of Fully Mechanized Coal Mining Face of Majiliang Coal Mine

作　　者：鲍永生[1] 

机构地区：[1]大同煤矿集团有限责任公司马脊梁煤矿,山西大同037000

出　　处：《煤矿开采》2018年第1期22-26,共5页Coal Mining Technology

摘　　要：以马脊梁矿8103工作面临空巷道5103巷道为研究对象,采用FLAC数值模拟、现场实测、现场实证等方法,对综放工作面临空巷道围岩变形特征及控制进行研究,分析了5103巷道变形特征,并提出相应的控制方案。研究结果表明:8103工作面回采过程中,5103巷道围岩变形严重,顶底板移近量最大达到1.5m,两帮移近量最大0.8m,影响范围为超前50m,严重区域为超前30m范围;提出"APR+PRS"的临空巷道围岩控制方案;通过周期来压步距、支架工作阻力、巷道表面位移监测验证"APR+PRS"临空巷道围岩控制方案的有效性,采取方案后工作面来压步距显著减小、支架工作阻力在8000~9000k N所占比例下降9.76%、顶底板移近量减少42%、两帮移近量减少40%、巷道变形严重区域由超前30m变为超前15m;"APR+PRS"巷道围岩控制方案有效地控制了临空巷道的围岩变形。It taking 5103 gob-side entry of 8103 working face in Majiliang coal mine as studying object, and then Flac numerical sim-ulation, field testing and field verification and so on were applied. Surrounding rock deformation characters and control of gob-side entryof fully mechanized working face was studied, and the deformation characters of 5103 entry was analyzed, and then corresponding con-trol scheme was put forward. The results showed that during 8103 working face mining, surrounding rock of 5103 entry damage severi-ty, the maximal convergence between roof to floor reached about 1. 5m, the maximal convergence between two sides was bout 0. 8m,the influence scope was about advanced 50m, seriously scope was about 30m, and then controlling scheme “APR＋PRS” to surround-ing rock of gob-side was put forward, its effective was verified by periodic weighting distance, supporting working resistance, roadwaysurface convergence monitoring, after the scheme was applied in field, the periodic weighting distance decreased obviously, the pro-portion of supporting working resistance 8000 ~ 9000kN decreased about 9. 76%, the convergence between roof to floor decreased a-bout 42%, two sides convergence decreased about 40%, the seriously scope of roadway deformation decreased from 30m to 15m, thesurrounding rock deformation of gob-side entry was controlled effectively.

关 键 词：综放开采 临空巷道 围岩变形 水压致裂 CO2致裂 

分 类 号：TD327.2[矿业工程—矿井建设]