深埋缓倾斜工作面沿空掘巷窄煤柱合理尺寸研究  

Study on Reasonable Size of Narrow Coal Pillar for Gob Side Entry Driving in Deep Buried Gently Inclined Working Face

作　　者：李冬辉 查舰 曹林虎 LI Donghui;ZHA Jian;CAO Linhu(Technician College of Jinneng Holding Coal Industry Group,Datong 037003,China;Technology Center of XishanCoal Electricity Group Co.,Ltd.,Taiyuan 030053,China)

机构地区：[1]晋能控股煤业集团有限公司技师学院,山西大同037003 [2]西山煤电(集团)有限责任公司技术中心,太原030053

出　　处：《煤炭技术》2022年第4期35-39,共5页Coal Technology

摘　　要：为解决杜儿坪煤矿沿空掘巷围岩控制技术问题,以72908工作面回采巷道为研究对象,采用理论分析、数值模拟、现场实测相结合的方法确定留设的窄小煤柱合理宽度。结果表明,72908工作面回风巷合理煤柱宽度为7 m,当宽度小于该值时,煤柱整体处于卸载状态,稳定性差,当宽带大于该值时,煤柱应力增高,巷道围岩变形量加大;现场监测结果表明顶底板及两帮变形量能满足巷道使用要求,巷道维护状况良好,既满足巷道使用要求,又提高回采率,能取得较好的社会和经济效益。In order to solve the surrounding rock control technology problem of the roadway driving along the goaf in Duerping coal mine,taking the 72908 working face mining roadway as the research object,the reasonable width of the narrow coal pillars retained is determined by the combination of theoretical analysis,numerical simulation and field measurement.The results show that the reasonable coal pillar width of the return airway of 72908 working face is 7 m.When the width is less than this value,the coal pillar is in the unloading state as a whole,and the stability is poor.When the broadband is larger than this value,the coal pillar stress increases,and the surrounding rock deformation of the roadway Increase in volume.The on-site monitoring results show that the deformation of the top and bottom plates and the two sets can meet the requirements of roadway use,and the roadway maintenance condition is good.It not only meets the requirements of roadway use,but also improves the recovery rate,and can achieve better social and economic benefits.

关 键 词：沿空掘巷 窄小煤柱 合理宽度 巷道变形 

分 类 号：TD822.3[矿业工程—煤矿开采]