摘要
为了满足采空区下覆特厚煤层综放工作面回采巷道的支护要求,以河南能源新疆公司永宁煤化2301首采工作面回采巷道为研究对象,通过FLAC^(3D)数值模拟软件,对比分析了巷道掘进初期、超前掘进工作面10m和50m三个开采阶段下原支护方案和优化支护方案下的巷道围岩应力状态,最终确定回采巷道的最终支护方式为"锚网索+钢筋梯"联合支护,并对锚杆和锚索的长度、直径、间排距、锚固力、锚固长度等参数进行了优化。优化后的方案完全可以满足工程需要,巷道的安全系数相对较高,为类似条件下煤层巷道支护设计积累了经验。
In order to meet the support requirements of the mining roadway in the fully mechanized caving face in extra thick coal seam under goaf,the mining roadway in 2301 first mining face of Yongning Coal Chemical Company is taken as the research object,and the stress state of roadway surrounding rocks is compared and analyzed through FLAC^(3D)numerical simulation software under the original support and the optimized support in three mining stages,namely the initial stage of roadway tunneling,10 m and 50 m ahead of the tunneling face.Finally,a combined support using anchor mesh cable and steel ladder is applied and the parameters such as length,diameter,row spacing,anchoring force,and anchoring length of anchor bolts and cables are optimized.The optimized scheme can fully meet the needs of the project,providing high safety for the project.
作者
张京民
ZHANG Jing-min(Xinjiang Investment Holding Co.,Ltd.,Henan Energy and Chemical Industry Group Co.,Ltd.,Urumqi 830026,China)
出处
《煤炭工程》
北大核心
2021年第1期56-59,共4页
Coal Engineering
关键词
采空区下覆
特厚煤层
易自燃煤层
回采巷道
支护优化
under goaf
extra thick coal seam
self-combustible coal seam
mining roadway
support optimization
作者简介
张京民(1980-),男,河南长垣人,采矿工程师、注册安全工程师、一级建造师,主要从事采矿工程与安全、技术管理工作,E-mail:1505042102@qq.com。
