坚硬顶板综放开采矿压规律研究

当今坚硬顶板控制技术不断发展,已成为煤矿采场矿压研究的重要内容之一。在我国有30%煤矿的煤层上都有着坚硬顶板支承。以淮北矿业公司朱仙庄煤矿Ⅱ865采区8#煤层开采为工程背景,采用相似模拟和数值计算软件FLAC3D对厚煤层坚硬顶板综放开采在回采阶段围岩的受力、变形与破坏进行研究,同时,结合理论分析计算老顶的初次来压和周期来压,并在此基础上提出此类巷道的围岩稳定控制对策。

Research on Hard Roof Fully Mechanized Sublevel Caving Mining

Today's hard roof control technology continues to derelop,it has become an important content.In China,the coal mines with hard roof support in coal seams accounts for 30%.It takes Huaibei mining company Zhuxianzhuang Ⅱ 865 8 coal seam mining in coal mine as the engineering background.It uses the similar simulation and numerical simulation software FLAC3 Dto study the stress,deformation and destruction of surrounding rocks in the thick coal seam fully mechanized sublevel caving mining in hard roof mining stage.At the same time,combining with the theory analysis and calculation first weighting and periodic weighting of main roof,and on the basis,the roadway surrounding rock stability control countermeasures are put forward.