论文部分内容阅读
为提高大断面切眼掘进速度及保证巷道掘进过程的整体稳定性,提出了一种适合连采机施工的一次成巷技术,大大提高了巷道掘进速度。采用Midas/GTS数值模拟研究了连采施工一次成巷与传统分断面二次成巷2种开挖方式下,开切眼的围岩变形特点及应力分布特征。研究结果表明:连采施工一次成巷时顶板下沉量、底臌量及围岩塑性区都较小,并且巷道受力相对均匀,更有利于巷道稳定。
In order to improve the tunneling speed of large cross-section cut and ensure the overall stability of tunneling, a new lane-forming technology suitable for continuous mining was put forward, which greatly enhanced the speed of roadway driving. The Midas / GTS numerical simulation was used to study the deformation characteristics and stress distribution characteristics of surrounding rock under open cut with two kinds of excavation methods. The research results show that the roof subsidence, the floor slab weight and the plastic zone of surrounding rock are all smaller when the secondary mining operation is completed. And the roadway is relatively even, so it is more conducive to the roadway stability.