公路下压煤巷式似膏体充填开采暂留煤柱合理宽度优化  

Optimization on reasonable width of temporary coal pillars in roadway type paste-like backfill mining

作　　者：赵卫强[1] ZHAO Wei-qiang(Beijing Polytechnic College,Beijing 100042,China)

机构地区：[1]北京工业职业技术学院,北京100042

出　　处：《煤炭工程》2022年第12期13-18,共6页Coal Engineering

基　　金：2022年度北京工业职业技术学院校立一般科研课题(BGY2022KY-22)

摘　　要：通过分析巷式似膏体充填开采过程中的矿山压力时空演化规律,阐述了巷式似膏体充填暂留煤柱、充填体在采充过程中的承载演化机制和特性,得到了对充填体极限强度的要求。由此计算得出不同宽度暂留煤柱平均应力,利用煤柱强度理论,计算得到暂留煤柱宽度的合理范围、充填体承受的极限载荷。最后校核充填体强度,采用数值模拟检验并优化暂留煤柱宽度,最终确定了合理的暂留煤柱宽度。By analyzing the temporal and spatial evolution law of mine pressure during the mining process of roadway-type paste-like backfill,the bearing evolution mechanism and characteristics of the roadway-type paste-like backfilling temporary coal pillar and backfill in the process of“mining-filling”were expounded,and the requirements for ultimate strength of fillings are obtained.Based on this,the average stress of the temporary coal pillars with different widths was calculated,and the reasonable range of the width of the temporary coal pillars and the ultimate load of the backfill were calculated using the coal pillar strength theory.Finally,the strength of the backfill was checked,and the width of the temporary coal pillar was checked and optimized by numerical simulation,and a reasonable width of the temporary coal pillar was determined.

关 键 词：巷式似膏体充填 暂留煤柱宽度 充填体强度 数值模拟 

分 类 号：TD823.7[矿业工程—煤矿开采]