浅埋煤层综采面护巷煤柱尺寸和布置方案优化  

Pillar Size Determination and Panel Layout Optimization for Fully Mechanized Faces in Shallow Seams

作　　者：屠世浩[1] 白庆升[1] 屠洪盛[1] 

机构地区：[1]中国矿业大学矿业工程学院,煤炭资源与安全开采国家重点实验室,江苏徐州221116

出　　处：《采矿与安全工程学报》2011年第4期505-510,共6页Journal of Mining & Safety Engineering

基　　金：煤炭资源与安全开采国家重点实验室自主研究课题项目(SKLCRSM09X02);江苏省“青蓝工程”项目;江苏省高校优势学科建设工程项目

摘　　要：根据浅埋薄基岩煤层顶板几乎沿采空区边缘垂直断裂,地表下沉速度快,采空区迅速压实等特点,运用理论分析、数值模拟和现场实测等研究方法,结合鄂尔多斯乌兰集团温家梁煤矿3-2煤层实际,得出了沿空掘巷合理护巷煤柱宽度为5m;滞后回采工作面50m左右,采空区基本处于稳定状态.在此基础上提出了在保证工作面顺序接替条件下的煤柱护巷与沿空掘巷相结合的回采巷道布置方案.现场应用表明:沿空掘进巷道和实体煤巷道在回采期间能保持较好的稳定性,使该矿工作面煤炭采出率提高了13%.The extraction of shallow seam with thin bedrock is characterized by roof caving vertically along the edge of the goaf, accompanied by rapid surface subsidence and goaf compaction. In this paper, taking the actual conditions of Seam 3-2 in Wenjialiang coal mine of Ulan mining group, Erdos for example, by using theoretical analysis, numerical simulation and field observations, et al, it is concluded that the reasonable width of chain pillar for gob-side entry driving is 5 m, and the goaf will gradually reach a stable state at about 50 m behind the face. Consequently, gateway layout optimization by combination of pillar entry protection and gobside entry driving is proposed under the condition of ensuring the face mining supersedure in order. Field application demonstrates that the entries along both the goal and solid coal can be maintained stably during the mining operation, thus making the coal recovery rate of working face increased by 13%.

关 键 词：采空区覆岩稳定性 巷道布置 煤柱设计 巷道变形机理 

分 类 号：TD322[矿业工程—矿井建设]