摘要
近距离煤层群下部煤层开采时会受到上覆煤层影响而使顶板裂隙发育,且当上覆煤层采空区内留设有区段煤柱时容易引起应力集中,给下覆煤层巷道掘进及回采带来制约。以山西某矿开采的5号煤层5201综采工作面回采巷道为研究对象,采用数值模拟技术合理确定回采巷道布置位置,并依据现场情况提出围岩支护方案。将设计好的支护方案应用后表明,巷道围岩变形量整体较小,可满足掘进及后续回采需求。
When mining the lower coal seam of the close coal seam group,the overlying coal seam will affect the development of roof fissures,and when there is a section of coal column in the overlying coal seam mining area,it is easy to cause stress concentration,which brings constraints to the lower coal seam roadway digging and back mining.The return roadway of the No.5 coal seam 5201 comprehensive mining working face of a mine in Shanxi Province is taken as the object of study.Numerical simulation techniques are used to reasonably determine the return roadway layout and propose a rock support scheme based on the site conditions.The designed support scheme was applied to show that the overall deformation of the surrounding rock of the roadway was small and could meet the requirements of digging and subsequent retrieval.
作者
马丽威
Ma Liwei(Shanxi Coking Coal Fenxi MiningZhengshan Coal Industry,Xiaoyi Shanxi 032300)
出处
《机械管理开发》
2023年第3期261-263,共3页
Mechanical Management and Development
关键词
近距离煤层群
巷道掘进
区段煤柱
围岩支护
close coal seam group
roadway excavation
section coal column
rock support
