摘要
综采工作面沿空留巷经历多次采动影响,矿压显现较为强烈,围岩变形量大,极易造成巷道围岩失稳。为了研究大采高工作面沿空留巷围岩控制问题,以某矿1313工作面留巷为研究背景,通过理论分析、数值模拟、现场实践等方法,分析沿空留巷围岩运动特征,提出“支-卸平衡”巷道围岩协同控制技术;加强了巷道围岩支护强度,改善了巷道围岩的应力环境。通过现场工程实践验证,1313工作面留巷的巷道顶底板变形量为246 mm,两帮变形量为442 mm,巷道表面没有明显的鼓出现象,巷道围岩变形量满足作业规程的相关规定。
Under the influence of multiple mining influences,the mining pressure is more intense and the surrounding rock deformation is large,which is easy to cause the surrounding rock instability of gob-side entry retaining in fully mechanized mining face.In order to study the surrounding rock control problem of gob-side entry retaining in large mining height working face,taking 1313working face retaining roadway as the research background,the movement characteristics of surrounding rock of gob-side entry retaining roadway were analyzed through theoretical analysis,numerical simulation,on-site practice,and other methods.The“support unloading balance”coordinated control technology for roadway surrounding rock was proposed,which strengthened the support strength of roadway surrounding rock and improved the stress environment of roadway surrounding rock.It was verified through onsite engineering practice.The deformation of the top and bottom of the roadway in a mine 1313 working face is 246 mm,and the deformation of the two sides is 442 mm.There is no obvious bulging phenomenon on the surface of the roadway,and the deformation of the surrounding rock of the roadway meets the relevant regulations of the operation regulations.
作者
张俊虎
陈振江
高贤成
张磊
李建华
邓鹏江
ZHANG Junhu;CHEN Zhenjiang;GAO Xiancheng;ZHANG Lei;LI Jianhua;DENG Pengjiang(Shaqu No.2 Coal Mine of Huajin Coking Coal Co.,Ltd.,Lyuliang 033399,China;China Coal Technology&Engineering Group Shenyang Research Institute,Fushun 113122,China;State Key Laboratory of Coal Mine Safety Technology,Fushun 113122,China)
出处
《煤矿安全》
CAS
北大核心
2024年第7期118-126,共9页
Safety in Coal Mines
基金
国家重点研发计划资助项目(2022YFC2904104)。
关键词
巷道围岩失稳
大采高工作面
沿空留巷
协同支护
围岩控制
surrounding rock instability of roadway
large mining height working face
gob-side entry retaining
cooperative sup-port
surrounding rock control
