孤岛工作面复杂应力条件下瓦斯抽放钻孔工艺研究  

Research on Gas Drainage Drilling Process Under Complex Stress Conditions in Isolated Island Working Face

作　　者：李云波 李笔文 陈天柱 Li Yunbo;Li Biwen;Chen Tianzhu(Shanxi Tiandi Wangpo Coal Industry Co.,Ltd.,Shanxi Jincheng 048021;China Coal Science and Engineering Group Xi'an Research Institute Co.,Ltd.,Shaanxi Xi'an 710077)

机构地区：[1]山西天地王坡煤业有限公司,山西晋城048021 [2]中煤科工集团西安研究院有限公司,陕西西安710077

出　　处：《山东煤炭科技》2023年第7期139-142,共4页Shandong Coal Science and Technology

摘　　要：针对王坡煤矿孤岛工作面瓦斯抽采钻孔成孔难的问题,通过理论分析、数值模拟和现场监测相结合的方法,对孤岛工作面煤岩体内部应力分布规律和变形破坏特征进行研究,同时结合钻机、钻具的升级改造,优化了复杂应力条件下碎软、高瓦斯煤层钻孔施工工艺技术体系,并通过试验验证螺旋钻杆强力回转扫孔并配氮气排渣更适用于复杂应力碎软煤层中瓦斯抽放孔施工。In view of the problem of difficulty in drilling holes and holes formation for gas drainage in the isolated island working face of Wangpo Coal Mine,a combination of theoretical analysis,numerical simulation,and on-site monitoring is used to study the internal stress distribution law and deformation and damage characteristics of the coal and rock mass in the isolated island working face.At the same time,combined with the upgrading and transformation of drilling rigs and drilling tools,the construction process and technology system for drilling in fragmented soft and high gas coal seams under complex stress conditions is optimized,and through experiments,it is verified that the spiral drill pipe with strong rotary hole sweeping and nitrogen slag removal is more suitable for the construction of gas drainage holes in complex stress fragmented soft coal seams.

关 键 词：孤岛工作面 地应力 瓦斯抽采 顺层钻孔 数值模拟 

分 类 号：TD712.6[矿业工程—矿井通风与安全]