特厚松软破碎煤层巷道联合支护技术研究  

Research on Combined Support Technology in Roadway with Extra-thick Soft and Broken Coal Seam

作　　者：王文 Wang Wen(Jinneng Coal Industry Co.,Ltd.,Huozhou Coal&Electricity Group Co.,Ltd.,Xinzhou,Shanxi 035100)

机构地区：[1]霍州煤电集团金能煤业有限公司,山西忻州035100

出　　处：《江西煤炭科技》2023年第3期4-7,共4页Jiangxi Coal Science & Technology

摘　　要：金能煤业2#煤层为松散破碎煤层,1201首采面顺槽沿底掘进期间变形量大、持续时间长,通过理论分析、钻孔窥视等手段分析破坏原因,确定围岩强度不足、支护方式不合理是引起巷道变形破坏的主要原因,提出采用长锚索+W钢带/工字钢+双层网的改进支护方式。试验结果表明:掘巷期间围岩稳定,顶板下沉量最大为14.8~17.4 mm,两帮移近量最大为5.2~7.4 mm,支护效果良好,可在后续工作面回采巷道推广使用。Aiming at the large deformation and long duration during the excavation along the crossheading bottom at 1201 first mining face in No.2 loose-and-broken coal seam of Jinneng Coal Industry Co.Ltd.,the author determines the roadway deformation and damage results from the adequate surrounding rock strength and the unreasonable support method by means of theoretical analysis and borehole peeping,and proposes an improved support method with long anchor cable,W-typed steel belt or I-typed beam and double-layer mesh,whose test results show that the surrounding rock is stable during the roadway excavation with 14.8~17.4 mm maximum roof subsidence and 5.2~7.4 mm maximum convergence of the two sides.

关 键 词：掘进巷道 特厚松软煤层 钻孔窥视 数值模拟 联合支护 

分 类 号：TD353.6[矿业工程—矿井建设]