• 论文
主办单位:煤炭科学研究总院有限公司、中国煤炭学会学术期刊工作委员会
动静载影响下大倾角工作面巷道两帮应力分布规律研究
  • Title

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

  • 作者

    韩泽鹏窦林名王正义乔中栋

  • Author

    HAN Zepeng,DOU Linming,WANG Zhengyi,QIAO Zhongdong

  • 单位

    中国矿业大学 深部煤炭资源开采教育部重点实验室中国矿业大学 矿业工程学院

  • 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。


  • Abstract
    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 Flac3D 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

  • KeyWords

    large dip working face; dynamic and static loading; maximum principal stress; large diameter drilling pressure relief optimization

  • 基金项目(Foundation)
    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)
  • 图表
    •  
    •  
    • 数值计算模型

    图(11) / 表(0)

相关问题

主办单位:煤炭科学研究总院有限公司 中国煤炭学会学术期刊工作委员会

©版权所有2015 煤炭科学研究总院有限公司 地址:北京市朝阳区和平里青年沟东路煤炭大厦 邮编:100013
京ICP备05086979号-16  技术支持:云智互联