房柱式采空区顶板垮落冲击对下层煤开采的影响评估研究  

Evaluation study of the influence on lower coal mining caused by room-pillar goaf roof caving impact

作　　者：孙万明 于秋鸽[1,2,3] 刘贵 SUN Wanming;YU Qiuge;LIU Gui(CCTEG Coal Mining Research Institute,Beijing 100013,China;Coal Mining&Designing Department,Tiandi Science&Technology Co.,Ltd.,Beijing 100013,China;Coal Mining&Designing Branch,China Coal Research Institute,Beijing 100013,China)

机构地区：[1]中煤科工开采研究院有限公司,北京100013 [2]天地科技股份有限公司开采设计事业部,北京100013 [3]煤炭科学研究总院开采设计研究分院,北京100013

出　　处：《中国矿业》2023年第12期147-152,共6页China Mining Magazine

基　　金：中国煤炭科工集团有限公司科技创新创业资金专项项目资助(编号:2022-2-ZD004)。

摘　　要：为了研究上层煤房柱式采空区顶板失稳垮落后对下煤层开采的影响,以某矿3-1煤层房柱式采空区下5-2煤层长壁综合机械化开采条件为研究背景,采用理论分析、数值模拟、实测数据对比等手段,分别对房柱式采空区顶板垮落冲击荷载及其在底板内的影响深度、下层煤开采覆岩破坏高度进行分析,并以上层煤顶板垮落冲击荷载影响范围是否波及下层煤开采覆岩破坏范围为判据评价上层煤对下层煤开采的影响程度。研究方法及判据可为类似条件房柱式采空区下煤层下行开采影响评估提供有益借鉴。In order to study the influence on lower coal mining caused by the instability and collapse of the upper room-pillar goaf,taking the No.5−2 coal seam longwall comprehensive mechanized mining conditions under the No.3−1 coal seam room-pillar goaf of a mine as the research background,theoretical analysis,numerical simulation and comparison of measured data are adopted.The room-pillar goaf roof caving impact load and its influence depth in the floor and the damage height of the overburden in the lower coal mining are analyzed respectively,and the influence degree of the upper coal on the lower coal mining is evaluated according to whether the influence range of the roof caving impact load extends to the overburden damage range of the lower coal mining.The research method and criterion can provide useful reference for the impact assessment of downgoing mining under similar conditions.

关 键 词：房柱式采空区 顶板垮落 冲击荷载 下行开采 下层煤 开采影响 

分 类 号：TD823[矿业工程—煤矿开采]