煤柱下高应力巷道非对称支护优化

Asymmetry Support Optimization for High Stress Roadway Under Coal Pillar

针对木瓜矿上煤层遗留煤柱下方回采巷道的非对称变形破坏问题,运用理论计算和数值模拟的方法,分析了巷道变形失稳的原因,并对巷道支护参数进行了优化设计,提出了非对称性支护方案。结果表明,木瓜矿上煤层遗留煤柱下方的回采巷道处在应力增高区,巷道两帮所受到的应力环境具有明显的非对称性。根据计算结果提出的非对称支护方案,与巷道的受力状况耦合,较原支护方案显著的控制了巷道的变形量,与全断面高强度支护方案相比,大大的节约了支护成本。

For the problem of asymmetry deformation and destruction for the Roadway under the legacy coal pillar of upper seams in Mugua Mine, using the method of theoretical calculations and numerical simulation, the article analyzed the causes of instability deformation to the roadway, and optimized roadway＇s parameters, proposed the asymmetry supporting scheme. The results show that the mining roadway is under high stress of legacy coal pillar of close - seam, and both sides of the roadway suffer stress environment with significant asymmetry. The proposed asymmetry supporting program, coupled with the roadway force situations, the deformation of roadway is significantly controlled than the original supporting scheme, which greatly saves support costs compared with the full - face support high - intensity program.