复杂环境下急倾斜特厚煤层安全开采

Safety top-coal-caving of heavy and steep coal seams under complex environment

摘要: 采用理论分析、数值计算等综合方法,研究了苇湖梁煤矿+579E2EB₁₊₂急倾斜煤层(64°)高阶段(54m)综放面开采中出现的采空区顶板坍塌与气体超限的问题.现场开采试验表明,采取快速推进、控制均匀放煤、优化通风系统及主动综合防瓦斯等有效措施,遏制动力学灾害并确保安全开采.

Abstract: The seam angle is 64°+ and the mining level height is 54 m at the + 579E2EB₁₊₂ top-coal-caving working face in Weihuliang Mine in northwestern China. Theoretical analysis, numerical calculation and field test were used to study roof collapse and gas overlimit in mined-out area during mining on the working face. The results show that fast mining, control symmetrical top-coal caving in dipping and strike directions, optimizing the ventilation system, and the initiative in preventing gas are valid for safety mining.