深部特厚煤层软岩动压巷道稳定性控制技术研究  

Stability control technology of soft rock dynamic pressure roadways in deep extra-thick coal seam

作　　者：孙锐 SUN Rui(State Key Laboratory of Coal Mine Disaster Prevention and Control,Chongqing 400037,China;CCTEG Chongqing Research Institute,Chongqing 400037,China)

机构地区：[1]煤矿灾害防控全国重点实验室,重庆400037 [2]中煤科工集团重庆研究院有限公司,重庆400037

出　　处：《煤炭工程》2025年第3期44-49,共6页Coal Engineering

基　　金：十四五国家重点研发计划(2023YFC3009003)。

摘　　要：针对小康矿软岩动压巷道出现大变形的难题,通过物理力学实验、地应力测试、锚索锚固力测试、围岩结构窥视及数值模拟等现场和实验室实验,从初次支护强度、巷道关键部位、围岩特性等角度,揭示了影响巷道稳定性控制的主控因素。据此提出了深部特厚煤层、软岩、动压巷道稳定性控制的方案。采用“高预紧力锚杆锚索+壁后混凝土+U型钢圆棚+注浆锚索+底角钢管混凝土”联合支护技术来控制深部软岩巷道围岩的变形与破坏。现场试验结果表明:在原支护基础上增加注浆锚索和底角钢管混凝土后,巷道围岩的变形量降低了95%以上,为类似煤矿软岩巷道大变形的治理提供了宝贵经验。Aiming at the problem of large deformation in soft rock dynamic pressure roadways of Xiaokang Mine,mechanical experiments,in-situ stress testing,anchor cable anchorage force testing,surrounding rock structure observation and other field and laboratory experiments were conducted,the main control factors affecting the stability control of roadway were revealed from the perspectives of primary support strength,key parts of roadway and surrounding rock lithology.The stability control scheme of deep extra-thick coal seam,extremely soft rock and dynamic pressure roadway was put forward.The combined support technology of high preload bolt and cable+backwall filling with concrete+U-shaped steel arch+grouting cable+bottom corner concrete-filled steel tube was used to control the deformation and failure of deep soft rock roadway.Field test results showed that the deformation of roadway surrounding rock was reduced by more than 95% after adding grouting cable and bottom corner concrete-filled steel tube on the basis of original support,which provides valuable experience for the control of nonlinear large deformation of soft rock roadway in other coal mines.

关 键 词：特厚煤层 软岩 动压巷道 围岩控制 数值模拟 

分 类 号：TD353[矿业工程—矿井建设]