矿井深部巷道切顶卸压围岩变形控制技术研究  

Study on Deformation Control Technology of Surrounding Rock by Roof Cutting in Deep Roadway

作　　者：石岩 张倩[1] 庞博 SHI Yan;ZHANG Qian;PANG Bo(Lu'an Vocational and Technical College,Changzhi 046204,China;Information Research Institute of Ministry of Emergency Management,Beijing 100037,China)

机构地区：[1]潞安职业技术学院,山西长治046204 [2]应急管理部信息研究院,北京100037

出　　处：《煤》2023年第1期22-24,64,共4页Coal

基　　金：国家自然基金青年项目(52104113)。

摘　　要：为了研究深部沿空巷道围岩变形原理及控制技术,文章以潞安集团司马煤矿1206工作面回风巷道为工程背景,针对工作面矿压显现剧烈,原支护方案无法有效控制围岩变形的情况,基于基本顶梁结构假设和来压步距理论进行沿空巷道变形原理分析,提出爆破切顶卸压围岩变形控制技术。结果表明:当沿空巷道爆破切顶后,基本顶断裂长度有效降低,并通过巷道围岩变形监测,确定巷道顶板、底板、煤柱帮和煤壁帮最大变形量分别为124 mm、80 mm、173 mm和113 mm,较原支护方案条件下围岩变形控制能力分别提高了80.7%、84.8%、80.2%和80.5%,说明爆破切顶方式对巷道围岩变形有明显的控制作用。In order to study the deformation principle and control technology of surrounding rock in deep gob-side entry,this paper takes the return air entry of No.1206 working face in Sima Coal Mine of Lu’an Group as the engineering background,aiming at the situation that the rock pressure in the working face is severe and the original support scheme can’t effectively control the deformation of surrounding rock,analyzes the deformation principle of gob-side entry based on the basic roof beam structure hypothesis and weighting step theory,and puts forward the control technology of blasting roof cutting and pressure relief surrounding rock deformation.The results show that the fracture length of the basic roof is effectively reduced after the gob-side entry blasting is cut off,and the maximum deformation of the roof,floor,coal pillar and wall of the roadway is determined to be 124 mm,80 mm,173 mm and 113 mm,respectively,which is 80.7%,84.8%,80.2%and 80.5%higher than that of the original support scheme.

关 键 词：爆破切顶卸压 关键块 来压步距 固支简支 围岩控制 

分 类 号：TD353[矿业工程—矿井建设]