深部大断面巷道围岩破坏机理及控制技术  

Failure mechanism and control technology of surrounding rock in deep large-section roadways

作　　者：赵宝福 ZHAO Baofu(China Coal Tianjin Design Engineering Co.,Ltd.,Tianjin 300131,China;China Coal(Tianjin)Underground Engineering Intelligent Research Institute Co.,Ltd.,Tianjin 300131,China)

机构地区：[1]中煤天津设计工程有限责任公司,天津300131 [2]中煤(天津)地下工程智能研究院有限公司,天津300131

出　　处：《煤炭工程》2025年第2期61-67,共7页Coal Engineering

摘　　要：针对大海则煤矿深部大断面巷道强烈破坏难题,通过现场调研总结了大断面巷道破坏特征,分析了大断面巷道破坏原因。在此基础上,针对性的提出了以高承载力柔性锚杆为核心的支护优化方案。为了验证优化方案的合理性,采用UDEC建立了Trigon模型,对比了原方案与优化方案两种情况下的巷道变形量、塑性区范围及围岩裂隙分布特征。模拟结果显示,采取优化方案后,围岩承载效果大幅提高,巷道变形量和塑性区范围明显降低,围岩内部裂隙数量大幅减少。现场开展工业性试验后,巷道围岩在50 d时趋于稳定,顶板最大下沉量197 mm,现场巷道整体成型效果较好。In response to the severe damage of deep and large-section roadways in the Dahaize Coal Mine,we summarized the damage characteristics of the roadways through on-site investigation and causes analysis of damage.On this basis,a targeted support optimization scheme was proposed with high bearing capacity flexible anchor rods as the core.In order to verify the rationality of the optimization scheme,a Trigon model was established using UDEC,and the deformation amount,plastic zone range,and distribution characteristics of rock fractures in the roadway were compared between the original and the optimized scheme under two different conditions.The simulation results show that,the optimized scheme significantly improves roadway stability,with markedly reduced deformation and plastic zone development,and substantially fewer internal fractures in the surrounding rock.In the industrial tests,the surrounding rock of the roadway stabilized at 50 days,with a maximum subsidence of 197 mm in the roof;and the overall shaping effect of the roadway was good.

关 键 词：大断面巷道 破坏机理 Trigon模型 裂隙 柔性锚杆 

分 类 号：TD353[矿业工程—矿井建设]