初采期坚硬顶板悬顶水力致裂治理技术  

Hydraulic Fracturing Control Technology for Hard Roof Overhang in Initial Mining

作　　者：乔磊 Qiao Lei(Silaogou Colliery,Jinneng Holding Coal Industry Group.,Datong,Shanxi 037000)

机构地区：[1]晋能控股煤业集团四老沟煤矿,山西大同037000

出　　处：《江西煤炭科技》2024年第3期72-74,78,共4页Jiangxi Coal Science & Technology

摘　　要：针对8108综采工作面初采期间存在大面积悬顶突然垮落导致出现冲击荷载和飓风的风险,四老沟矿通过运用岩石断裂动力学理论对工作面采场应力状态进行理论分析,实施“实时周期立体交叉水力压裂技术”,第一次水力压裂后,工作面推进至9 m时,顶板初次垮落;工作面支架最大受力较常规采煤工法增大约10%,工作面推进60 m过程中,局部最大悬顶长度为12 m,表明顶板均垮落及时。Aiming at the risk of impact load and air shock wave caused by the sudden collapse of large roof overhang during the initial mining at 8108 fully-mechanized mining face of Silaogou Colliery,the author proposes the hydraulic fracturing technology with real-time periodic grade separation method by theoretical analysis of the stress state in the mining field based on the rock fracturing dynamics theory,in which the initial roof caving occurs when the working face advances to 9 m after the first hydraulic fracturing with 10%increase of the maximum force of the support on the working face compared with the conventional coal mining method;and when the working face advances to 60 m,the local maximum length of the hanging roof is 12m,indicating that the roof falls in time.

关 键 词：初采 大面积悬顶 立体交叉法 水力压裂 

分 类 号：TD823.85[矿业工程—煤矿开采]