下保护层开采时上覆煤层裂隙演化规律的研究  

Researches on Fracture Evolution Law of Overburden Coal Layer of Below Protective Seam Mining

作　　者：王晓蕾[1] 秦启荣[1] 范存辉[1] 苏培东[1] 

机构地区：[1]西南石油大学地球科学与技术学院,成都610500

出　　处：《世界科技研究与发展》2015年第6期663-667,共5页World Sci-Tech R&D

摘　　要：以郭庄煤矿为试验矿井,采用钻孔电视和分段注水试验对保护层开采时被保护层裂隙演化规律进行研究,分析采动后上覆煤层裂隙倾角、裂隙数量与钻孔深度的关系、裂隙数量与宽度的关系,并就保护层开采后上覆煤层破坏规律进行数值分析与相似模型试验。研究结果表明:保护层开采后被保护层裂隙随着工作面的推进不断发育,裂隙数量上升,且增加的裂隙以小角度(与垂直方向)、小宽度(小于15 mm)为主;上覆煤层裂隙数量与裂隙宽度随着工作面的不断推进呈波浪型变化。Taking Guozhuang coal as the experimental mine ,by using zonal water injection test and borehole televiewer system ,fracture evolution law of ＇protective seam is researched and relationship of fractures when protective seam mining such as change of dip angle, numbers and depth, numbers and width are analysed. At the same time, similarity model and numerical model experiment of fissure development evolution are carried out. The results show that fracture number of protective seam increases with straight line and the fracture characteristics are main small angle （ with vertical direction） and small width（less than 15mm）with protection seam mining; overburden coal-bed fractures is change just like wave -shapes with protective seam mining.

关 键 词：采矿工程 裂隙 保护层 钻孔电视 覆岩 分段注水 

分 类 号：TD823[矿业工程—煤矿开采]