摘要
针对上榆泉煤矿近距离采空区下巷道支护效果提升问题,采用理论分析和数值模拟,分析不同锚杆间距、排距、长度对巷道稳定性的影响,构建巷道计算模型,模拟围岩应力与位移变化。结果表明,锚杆排距1200 mm、长度1800 mm时,垂直应力峰值降至17.58 MPa,顶板最大下沉量18 mm、底鼓量最大值19 mm、两帮移近量38 mm;提出优化支护方案:顶板每排4根Ф18 mm×1800 mm锚杆(预紧力70 kN),帮部每排2根锚杆(间距1500 mm、排距1200 mm),配合Ф17.8 mm×8000 mm锚索(预紧力150 kN)及金属网(顶网5400 mm×1650 mm、两帮网3700 mm×1650 mm、搭接100 mm)。该方案有效控制巷道变形,降低工程成本,为煤矿安全生产及相关领域研究提供技术支持与参考。
In response to the problem of improving the support effect of the roadway in the close-range goaf of Shangyuquan Coal Mine,the numerical models,Mohr-Coulomb models,limit equilibrium mechanics models,and slip line field theory were adopted to analyze the impacts of different bolt spacing,row spacing,and length on roadway stability.A roadway calculation model was constructed to simulate changes in surrounding rock stress and displacement.The research shows that when the rod spacing is 1200 mm and the length is 1800 mm,the peak vertical stress drops to 17.58 MPa,the maximum sinking of the roof is 18 mm,the maximum floor heave is 19 mm,and the convergence of the two sides is 38 mm.An optimized supporting plan was proposed:4 bolts with a diameter of 18 mm×1800 mm(pre tension force of 70 kN)per row on the roof,2 bolts with a spacing of 1500 mm and a spacing of 1200 mm per row on the sides,combined with anchor cables with a diameter of 17.8 mm×8000 mm(pre tension force of 150 kN)and metal mesh(roof mesh of 5400 mm×1650 mm,two side mesh of 3700 mm×1650 mm,overlap 100 mm).This solution effectively controls roadway deformation,reduces engineering costs,and provides technical support for coal mine safety production and related research fields.
作者
庞锦彪
Pang Jinbiao(No.4 Coal Mine,China Pingmei Shenma Group,Pingdingshan 467000,China)
出处
《能源与环保》
2026年第1期265-272,共8页
CHINA ENERGY AND ENVIRONMENTAL PROTECTION
基金
国家重点研发计划资助项目(2017YFC0804209)。
关键词
智能掘进
支护优化
近距离煤层
施工工艺
intelligent driving
supporting optimization
close-range coal seam
construction technology
