摘要
针对北峙峪煤业15号煤层一采区胶带巷在原有掘进工艺及支护方式下围岩变形量大的问题,通过数值模拟分析巷道采用不同掘进工艺时围岩位移及塑性区的分布状态,确定巷道采用分步开挖进行掘进作业,将模拟结果与工作面具体地质条件相结合对支护方案进行了优化设计。监测结果表明:优化后的掘进工艺及支护方案实施后,顶板下沉量为17mm,两帮移近量为37mm,保障了巷道围岩的稳定。
In order to solve the problem of large deformation of surrounding rock under the original excavation process and supporting mode of the No 15 coal seam first mining area, the numerical simulation is used to analyze the distribution of surrounding rock displacement and plastic zone during different tunneling processes, and the laneway is determined. Step-by-step excavation is carried out to carry out the excavation operation, and the simulation results are combined with the specific geological conditions of the working face to carry out specific optimization design of the support scheme and carry out mine pressure monitoring. The results show that after the optimization of the excavation process and support scheme, the subsidence of the roof is 17 mm, and the displacement of the two gangs is 37 mm, which ensures the stability of the surrounding rock of the roadway.
作者
郝权
HAO Quan(Shanxi Changzhi Yangtouling Beizhiyu Mining Industry Co.,Ltd.,Changzhi 046000,China)
出处
《煤》
2019年第6期10-12,共3页
Coal
关键词
大断面
分步开挖
围岩控制
large section
step excavation
surrounding rock control
