动静载影响下大倾角工作面巷道两帮应力分布规律研究  

Research on stress distribution law of two ribs in large dip angle working face under influence of dynamic and static loads

作　　者：韩泽鹏 窦林名[1,2] 王正义 乔中栋[3] HAN Zepeng;DOU Linming;WANG Zhengyi;QIAO Zhongdong(Key Laboratory of Deep Coal Resource Mining,Ministry of Education of China,China University of Mining and Technology,Xuzhou221116,China;School of Mines,China University of Mining and Technology,Xuzhou221116,China;Huating Coal Mine,Gansu Huating Coal and Electricity Co.,Ltd.,Huating744100,China)

机构地区：[1]中国矿业大学深部煤炭资源开采教育部重点实验室,江苏徐州221116 [2]中国矿业大学矿业工程学院,江苏徐州221116 [3]甘肃华亭煤电股份有限公司华亭煤矿,甘肃华亭744100

出　　处：《煤炭科学技术》2019年第9期183-188,共6页Coal Science and Technology

基　　金：国家重点研发计划资助项目(2016YFC0801403,2016YFC0801408);国家自然科学基金资助项目(51874292)

摘　　要：为了研究动静载影响下大倾角工作面运输巷、回风巷帮部最大主应力分布特征,以新疆博斯坦煤矿1132工作面地质条件为原型,建立了煤层倾角37°的FLAC3D数值模型进行数值模拟研究。结果表明:静载影响下大倾角工作面最大主应力分布非对称,运输巷和回风巷两帮表现为左帮高应力区偏下,右帮高应力区偏上的特征;动静载叠加影响下,运输巷帮最大主应力波动幅度大于回风巷,运输巷和回风巷左帮最大主应力升高,右帮最大主应力降低,巷道帮部最大主应力分布比静载作用下更加不对称。针对大倾角工作面巷道帮部的最大主应力分布特征,对大直径钻孔卸压措施进行优化,经现场钻屑检验,运输巷回采帮钻屑量平均降低11.8%,回风巷回采帮钻屑量平均降低16.5%,卸压效果良好。In order to study the maximum principal stress distribution characteristics of the roadway and return airway ribs under the influence of dynamic and static loads,a numerical simulation of the Flac 3D numerical model with a tilt angle of 37°was established based on the geological conditions of the No.1132 working face of Bostan Coal Mine in Xinjiang.The results show that the maximum principal stress distribution of the large dip angle working face is asymmetric under the influence of static load.The two sections of the transportation roadway and the return airway were characterized by the lower left high stress area and the right upper high stress area.Under the influence of dynamic and static loading,the maximum principal stress fluctuation of the roadway was larger than that of the return airway.The maximum principal stress of the left rib of the transportation roadway and the return airway was increased,the maximum principal stress of the right rib was reduced,the maximum principal stress distribution of the roadway rib was reduced,and the maximum principal stress distribution of the roadway rib was more asymmetrical than under static load.According to the maximum principal stress distribution characteristics of the roadway ribs of the large dip angle working face,the large-diameter drilling pressure relief measures were optimized.After the on-site cuttings inspection,the amount of cuttings in the transportation lanes were reduced by 11.8%on average.The amount of cuttings were reduced by 16.5%on average,and the pressure relief effect was good.

关 键 词：大倾角工作面 动静载叠加 最大主应力 大直径钻孔卸压优化 

分 类 号：TD322[矿业工程—矿井建设]