坚硬顶板围岩垮落变形规律相似模拟试验研究  

Similarity Simulation Test Study on Collapse Deformation Law of Surrounding Rock of Hard Roof

作　　者：罗明坤 LUO Ming-kun(Zhangcun Coal Mine of Lu’an Environmental Energy Development Co.,Ltd.,Changzhi 046031,China;Scientific Research Center of Lu’an Chemical Industry Group Co.,Ltd.,Changzhi 046204,China)

机构地区：[1]山西潞安环保能源开发股份有限公司漳村煤矿,山西长治046031 [2]山西潞安化工集团有限责任公司科研中心,山西长治046204

出　　处：《煤》2021年第6期16-18,35,41,共5页Coal

摘　　要：为了进一步揭示坚硬顶板采区大巷的变形规律和保安煤柱的应力分布特征,利用相似模拟实验,研究了坚硬顶板开采条件下覆岩的运移、垮落规律和大巷变形破坏特征。得到了以下结论:采空区坚硬顶板悬顶长度较长,工作面初次来压步距为37 m,周期来压步距为23 m;采动影响下巷道围岩变形呈现顶板挤压移进、两帮鼓起的大变形的特征,相似试验为工作面顶板来压步距及采区大巷应力及变形提供依据。In order to further reveal the deformation law of the main roadway in the hard roof mining area and the stress distribution characteristics of the security coal pillar,similar simulation experiments are used to study the movement and caving law of the overburden rock and the deformation and failure characteristics of the main roadway under the condition of hard roof mining..The following conclusions are obtained:the suspended roof length of the hard roof in the mined-out area is long,the initial pressure step distance of the working face is 37 m,and the periodic pressure step distance is 23 m;the surrounding rock deformation of the roadway under the influence of mining shows that the roof squeezes in and moves in.The characteristics of the large deformation of the bulge,the similar test provides the basis for the pressure step of the working face roof and the stress and deformation of the main roadway in the mining area.

关 键 词：坚硬顶板 覆岩运移 初次来压步距 周期来压 

分 类 号：TD353[矿业工程—矿井建设]