高压组合水射流径向多分支钻孔煤层增透技术优化
Optimization of coal seam permeability improvement technology by radial multi-branch borehole high pressure combined water jet
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摘要: 为了解决目前高瓦斯煤层瓦斯抽放布孔密度大、单孔抽放影响范围小、抽放量少、钻机搬运频繁和工作效率低下等问题,采用高压组合水射流技术,优化设计前、后喷嘴以及转向器;在轴向孔的基础上,实现多个径向分枝子孔抽采技术。研究结果表明:以多组合高压喷头和软管配合破煤岩、转向装置小半径转向,对煤体瞬时施加动能载荷,实现煤岩体动态损伤和裂隙,可以快速提高煤层瓦斯透气性。Abstract: In order to solve the problems such as high density of gas drainage hole, small influence range of single hole drainage, little amount of drainage, frequent carrying of drilling rig and low working efficiency, using high pressure combined water jet technology, we optimize the design of front and back nozzles and steering gear. On the basis of the axial hole, the technology of multiple radial branch holes extraction is realized. The results of the study show that with multi-combination high-pressure nozzle and hose combined with coal rock breaking and small radius turning of steering device, the dynamic kinetic energy load is applied to the coal body to realize dynamic damage and fracture of coal and rock mass, and the gas permeability of coal seam can be rapidly improved.
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期刊类型引用(3)
1. 宋建民，邹永洺. 基于EGF增渗材料的煤层酸化增透技术研究. 煤矿安全. 2023(05): 161-168 . 
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2. 韩培壮，高亚斌，王飞，向鑫，郭晓亚. 圆锥形喷嘴出口直径对水射流冲击动力特性的影响研究. 中国安全生产科学技术. 2022(07): 75-80 . 百度学术
3. 刘文川，汤积仁，张慧栋，李怡静. 过热液体闪沸喷射钻进羽流相互作用调控及成孔直径预测. 煤炭学报. 2022(09): 3270-3283 . 百度学术
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