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张辉*,李国盛,蒋帅旗.巷道底板小孔径锚固孔深孔钻进强力排渣机理研究[J].实验力学,2020,35(1):151~158
巷道底板小孔径锚固孔深孔钻进强力排渣机理研究
Study of the mechanism of strong slag discharge in deep hole drilling of small-bore anchoring hole in roadway floor
投稿时间:2018-05-07  修订日期:2018-08-05
DOI:10.7520/1001-4888-18-098
中文关键词:  底板锚固孔  强力排渣  水力损失  冲洗液压力
英文关键词:floor anchoring hole  strong slag discharge  hydraulic loss  washing fluid pressure
基金项目:河南省科技厅科技攻关项目(182102310005)资助
作者单位
张辉* 1.河南理工大学 能源科学与工程学院 河南焦作 454003 2.煤炭科学研究总院开采设计研究分院 北京1000133.煤炭安全生产河南省协同创新中心 河南焦作 454000 
李国盛 河南理工大学 能源科学与工程学院 河南焦作 454003 
蒋帅旗 河南理工大学 能源科学与工程学院 河南焦作 454003 
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中文摘要:
      为了解决煤矿巷道底板锚固孔钻进困难的问题,本文提出采用高压水流正循环钻进可以有效避免“钻渣三区”的形成,并研发了一套巷道底板锚固孔深孔强力排渣系统。利用固液两相耦合流体力学理论,推导出冲洗液压力与钻渣颗粒半径、钻渣浓度和钻孔深度之间的关系式以及钻孔深度、钻渣上返速度与冲洗液压力之间的计算公式。结果表明:随着钻渣浓度的提高及钻渣半径的增大,能量消耗的频度和强度就会增加,所需要的冲洗液压力也会增大;冲洗液压力随着钻孔深度的增加而逐渐增大,当钻孔深度为8m时,要求冲洗液压力大于1.9MPa,另外降低钻机推进速度及增大钻头钻速,是保证锚固孔钻进强力排渣的关键。
英文摘要:
      In order to solve the difficult problem of anchor hole drilling in roadway floor of coal mine, this paper puts forward that high-pressure water flow positive circulation drilling can effectively avoid the formation of "three areas of drilling slag", and develops a set of strong slag discharge system for anchoring deep hole in roadway floor. By using solid-liquid two-phase coupled fluid dynamics theory, the relation expressions among the flushing fluid pressure, drilling slag particle radius, drilling slag concentration, drilling depth were deduced. At the same time, computational formula of the drilling depth, drilling slag upward return velocity and flushing fluid pressure were also derived. Results show that with the increase of the drilling slag concentration and the increase of the radius of the drilling slag, the frequency and intensity of energy consumption increase, and the pressure of flushing fluid also increases. The pressure of flushing fluid increases with the increase of drilling depth.When the drilling depth is 8 m, the pressure of flushing fluid is required to be greater than 1.9 MPa. In addition, decreasing the propulsion speed of drilling rig and increasing the drilling speed are the key to ensure the strong slag discharge in anchorage hole drilling.
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