深井大断面松软破碎围岩巷道稳定性控制技术  

Stability Control Technology of Deep Mine Rock Roadway with Large Cross Section and Soft Broken Surrounding Rock

作　　者：张传恕[1] 杜计平[2] 

机构地区：[1]新汶矿业集团有限责任公司孙村煤矿,山东新泰271219 [2]中国矿业大学矿业工程学院,江苏徐州221116

出　　处：《煤炭科学技术》2013年第12期19-22,26,共5页Coal Science and Technology

摘　　要：针对孙村煤矿埋深1 300 m的-1 100 m水平西大巷围岩松软破碎现状,为改善大巷掘进期间矿压显现强烈的状况和降低巷道开掘后围岩的流变速度,使巷道围岩变形得到有效控制,通过采取高强让压锚杆、增加锚杆长度、锚杆安装时施加预紧力等措施,使用快速高预紧力高强度新型锚索实施二次支护,并使用管缝式锚杆对西大巷实施超前支护及先喷后锚的施工顺序。试验结果表明:巷道开掘70 d后,顶板最大下沉量65 mm,最大底鼓量312 mm,两帮最大移近量111 mm,巷道两帮移近速度大多控制在1.0 mm/d以下,极松软破碎段控制在1.5 mm/d以下,埋深1 300 m的大断面松软破碎巷道围岩变形巷道得到有效控制。Based on the soft and broken surrounding rock conditions of the - 1 100 m west roadway in depth of 1 300 m in Suncun Mine, in order to change the serious strong condition of the mine strata pressure behaviors occurred during the mine roadway heading period and to reduce the rheologic speed of the surrounding rock after the mine roadway heading completed,the high strength yield bolt, enlarged bolt length,rational pre-tension made during the bolt installed and other measures were applied to effectively control of the surrounding rock deformation in the roadway.The fast high pre-tension and high strength new type anchor was applied to the secondary support.The slit wedge tubing bolt was applied to the advance support and the shotcreting and then bolt construction sequence of west roadway.The trial re- sults showed that after 70 days of the mine roadway excavation and heading, the max subsidence of the roof was 65 mm, the max floor heave was 312 mm and the max convergence of the two sidewalls was 111 mm.The convergence speed of the two sidewalls was controlled below 1.0 mm/d mostly and the ultra soft and broken section of the roadway was controlled below 1.5 mm/d.The surrounding rock deformation of the large cross section roadway with the soft and broken surrounding rock was effectively controlled.

关 键 词：千米深井 松软破碎围岩 大断面巷道 围岩控制 

分 类 号：TD353[矿业工程—矿井建设]