魏家地运输大巷返修支护效果的FLAC模拟分析

 以魏家地运输大巷返修试验段工程为依托，应用FLAC3D数值模拟软件建立与实际支护设计相一致的计算模型，并结合现场监测结果进行分析，得到在锚网喷+锚注一次支护基础上进行留设柔垫层让压联合支护方案适应三软煤层变形特征。现场试验表明：返修支护方案是可行的，保证了运输大巷围岩的稳定,满足了魏家地煤矿安全生产的需要，提出的留设柔垫层联合支护技术对类似工程有一定的参考价值。

FLAC Simulation Analysis of Maintenance Supporting Effect on Main Haulage Roadway in Wei Jiadi Coal Mine

Rely on the maintenance test project of main haulage in Wei Jiadi coal mine，the calculation model is built consistent to actual supporting design using Flac3d numerical simulation software . Making analysis combined with field monitoring data could get a result that it is adapt to the denaturation features of three soft coal seam using the reserve soft cushion and relief pressure combined support technology based on first supporting of bolt-mesh-spurting + bolt-grouting. The field tests showed that this maintenance supporting scheme is feasible and it ensured surrounding rock stability on main haulage roadway, met the requirements of safety production in Wei Jiadi coal mine, and the reserve soft cushion and relief pressure combined support technology proposed in this project has certain reference value for similar projects.