摘要
针对晋华宫矿11号煤层2707运输平巷顶板破碎区域巷道变围岩形严重,支护系统损毁等矿压现象,结合现场实际情况分析巷道变形破坏原因,提出高预应力桁架锚索加强支护技术,并应用于现场实践。结果表明,实施高强高预应力桁架锚索加强支护方案后,巷道围岩变形量明显减少,确保综采工作面安全顺利通过运输平巷顶板破碎段。
According to the strata behavior in No.11 coal seam 2707 haulage entry fractured roof section of Jinhuagong Mine,such as large roadway deformation and support system damage,and in combination with actual engineering conditions,the roadway deformation factors were analyzed and high pre-stress truss anchor cable strengthened support technique was put forward and applied into practice.The results showed that the application of the high strength and high pre-stress truss anchor cable strengthened support program,the roadway deformation amount obviously decreased than before,and ensured the fully mechanized mining face advance in fractured roof entry section and guaranteed safe.
出处
《煤炭与化工》
CAS
2014年第5期120-121,124,共3页
Coal and Chemical Industry
关键词
破碎顶板
桁架锚索
围岩变形
fractured roof
truss anchor cable
surrounding rock deformation
