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龙口矿区1101材料巷道顶底板破碎、局部冒顶。为探究巷道顶底板岩性,对巷道顶底板岩样进行了常规三轴及短时蠕变试验;为探求最佳支护方式,采用FLAC3D对不同支护形式下巷道位移矢量特征、应力特征及塑性区范围进行计算,选取最佳支护方案并运用于现场支护。结果表明:随围压增大,含油泥岩屈服强度及蠕变系数非线性增加;顶板与两帮收敛速度与位移量降低,巷道围岩稳定性增强,顶板两帮移近量减小,巷道顶板破碎得以改善。
Longkou mining area 1101 roadway roof and floor broken, local roof. In order to explore the top and bottom rock roadway, three-axis and short-term creep tests were carried out on roof and floor rock samples. In order to find out the best support method, FLAC3D was used to study the characteristics and stress characteristics of roadway displacement vectors under different support patterns Plastic zone range calculation, select the best support program and applied to the site support. The results show that with the increase of confining pressure, the yield strength and creep coefficient of oil-bearing mudstone increase non-linearly. The convergence speed and displacement of roof and billet decrease, the stability of surrounding rock of roadway increases, Broken to be improved.