上层煤残留煤柱预裂爆破卸压合理参数研究  

Reasonable parameters of pre-splitting blasting pressure relief of residual coal pillar in upper coal seam

作　　者：梁明 张焙炎 LIANG Ming;ZHANG Beiyan(Shaanxi Energy Fengjiata Mining Operation Co.,Ltd.,Yulin 719400,China;School of Mines,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]陕西能源冯家塔矿业运营有限责任公司,陕西榆林719400 [2]中国矿业大学矿业工程学院,江苏徐州221116

出　　处：《煤炭工程》2023年第4期82-86,共5页Coal Engineering

摘　　要：针对浅埋残留煤柱下工作面开采易出现压架等问题,提出了预裂爆破残留煤柱、缓解应力集聚减灾的方法,基于冯家塔煤矿地质生产条件,采用理论分析与数值模拟相结合的方法,研究了残留煤柱的承载特性和应力分布特征,分析了不耦合系数、轴向装药系数、炮孔布置及起爆方式对残留煤柱致裂效果的影响机制,确定了合理爆破参数。结果表明,爆破煤柱可降低煤柱对上覆载荷的传递作用,进而减小对下煤层支架的作用力。Aiming at the support crushing and other problems in the working face mining under shallow-buried residual coal pillar,it was proposed to use pre-splitting blasting for the residual coal pillar to relieve stress concentration and reduce the disaster reduction was proposed.Based on the geological production conditions of Fengjiata Coal Mine,the bearing characteristics and stress distribution characteristics of residual coal pillar were studied combining the results of theoretical analysis and numerical simulation.The influence mechanism of uncoupling coefficient,axial charge coefficient,blast hole layout and initiation mode on the cracking effect of residual coal pillar was analyzed,and the reasonable blasting parameters were determined.The results show that the blasting coal pillar can reduce the transfer effect of coal pillar on the overlying load,thereby reducing the force on the lower coal seam support.

关 键 词：近距离煤层 残留煤柱 预裂爆破 爆破参数 

分 类 号：TD327.2[矿业工程—矿井建设]