受动压影响巷道注浆加固技术研究  

Study on grouting reinforced technology of roadway affected by dynamic pressure

作　　者：任海强[1] 陶广美[2] 

机构地区：[1]山西晋城无烟煤矿业集团有限责任公司寺河煤矿,山西晋城048205 [2]山西晋煤集团技术研究院有限责任公司,山西晋城048000

出　　处：《煤炭科学技术》2016年第3期22-25,共4页Coal Science and Technology

基　　金：国家重点基础研究发展计划(973计划)资助项目(2014CB238904)

摘　　要：为了解决大采高工作面留巷难的问题,采用现场巷道变形及钻孔电视观测,对巷道变形规律及煤壁破坏区域进行研究,提出分层次注浆方法,确定了合理注浆时机。工业性试验结果表明：巷道煤壁受采动影响由外向里依次形成了完全渗流区（0-3 m）、定向渗流区（3.0-6.4 m）、渗流屏蔽区（6.4-8.1 m）和原岩渗流区（8.1 m以内）;采用层次注浆法能够有效解决漏浆问题,提高钻孔注浆量;浅孔注浆时机选择在工作面前方24-58 m的初始变形阶段,深孔注浆选择在工作面前方7 m到工作面后方18 m的变形速度减缓阶段。现场工业性试验表明,注浆加固段的两帮移近量最大为448 mm,未注浆段最大为811 mm,巷帮注浆加固效果明显,为留巷提供有利条件。In order to solve the roadway retained difficult problem of the high cutting coal mining face,the borehole TV observation on the site roadway deformation were applied to a study on the roadway deformation law and coal wall failure zone. A layer grouting method was provided and a rational grouting opportunity was set up. The industrial trial results showed that influenced by the mining operations,the roadway would form a full seepage zone（ 0 - 3 m）,directional seepage zone（ 3. 0 - 6. 4 m）,seepage shielded area（ 6. 4 - 8. 1 m） and insitu rock seepage zone（ within 8. 1 m） in sequences from the external to internal.The layer grouting method could be applied to solve the grout leakage problem effectively and could improve the grouting volume of the borehole. The grouting opportunity of the shallow borehole could be selected at an initial deformation stage from 24 - 58 m in the front of the coal mining face and the grouting opportunity of the deep borehole should be selected at the a deformation velocity retarding stage from 7 m in a front of the coal mining face to 18 m at the rear of the coal mining face.The site industrial trial showed that the convergence of the two sidewalls at the grouting reinforced section was 448 mm in max and the convergence of the two sidewalls at the no grouting section was 811 mm in max. The grouting reinforcement effect of the roadway sidewalls was obvious and could provide favorable conditions to the roadway to be retained.

关 键 词：动压巷道 注浆加固 巷道变形 层次注浆 

分 类 号：TD322[矿业工程—矿井建设]