摘要
为了实现特厚煤层综放工作面的安全开采,采用理论分析和数值模拟方法对不同采厚条件下煤层覆岩结构演化规律、应力演化规律进行了研究。模拟得出,当采厚增加到18 m时,倾向支承压力影响范围距煤壁107 m,倾向支承压力降低区为0~18 m。研究结果表明:特厚煤层综放开采过程中,覆岩结构会形成“低位悬臂梁+高位砌体梁”的结构特征;随着煤层采厚的增加,侧向应力峰值逐渐降低,峰值距煤壁距离、应力影响范围、应力降低区范围均会不同程度的增加。研究成果为特厚煤层综放工作面开采顶板管理,巷道布置提供了理论依据。
In order to realize the safe mining of fully-mechanized caving face of extra-thick coal seam,theoretical analysis and numerical simulation methods are used to study the evolution law of overlying rock structure and stress evolution law of coal seam under different mining thickness conditions.The simulation shows that when the mining thickness increases to 18 m,the influence range of the inclination bearing pressure is 107 m away from the coal wall,and the reduction area of the inclination bearing pressure is 0~18 m.The research results show that:in the process of fully-mechanized caving mining of extra-thick coal seam,the overlying rock structure will form the structural characteristics of“low-level cantilever beam+high-level masonry beam”:The wall distance,the range of stress influence and the range of stress reduction zone will all increase to different degrees.The research results provide a theoretical basis for the roof management and roadway layout of fully-mechanized caving face mining in extra-thick coal seams.
作者
郎明辉
LANG Ming-hui(Shanxi Jinneng Holding Group Jincheng Coal Division Yixin Coal Industry,Jincheng 048200, China)
出处
《煤》
2022年第7期22-24,共3页
Coal
基金
山西省应用基础研究计划——面上青年基金资助项目(201901D211033)。
关键词
综放开采
采厚效应
覆岩结构
侧向应力
fully-mechanized caving mining
mining thickness effect
overburden structure
lateral stress
