高压水射流装置冲孔参数模拟与试验研究

发布时间：2018-06-28 15:45

本文选题：高压水射流 + 流体参数　；参考：《煤矿开采》2017年06期

【摘要】：采用伯努利方程和机械能衡算公式计算了新设计的螺旋杆式水射流冲孔增透装置的射流有效破煤速度。通过数值模拟分析了不同射速时水射流流体状态,依据煤体坚固性系数f和抗拉强度确定了装置的有效冲孔范围,并针对钱家营矿-600m水平7煤层进行了现场试验考证。研究结果表明:通过控制水射流装置的水压与流量可调节水射流出口速度,射速随水压、流量的增加而增加,对煤体产生的破碎范围也随之增加。通过数值模拟与现场试验结果分析,证实了数值模拟研究中依据煤体坚固性系数f与抗拉强度能够客观地确定不同射速下的冲孔范围,为装置的现场应用提供了参数支撑。
[Abstract]:Bernoulli equation and mechanical energy balance formula are used to calculate the effective coal breaking velocity of the newly designed spiral water jet perforation and antireflection device. Based on the numerical simulation and analysis of the water jet fluid state at different firing speeds, the effective punching range of the unit is determined according to the coal body firmness coefficient f and tensile strength, and the field test is carried out for Qianjiaying Mine -600m horizontal 7 coal seam. The results show that the velocity of water jet outlet can be adjusted by controlling the water pressure and flow rate of the water jet device. The velocity of injection increases with the increase of water pressure and flow rate, and the breaking range of coal body increases. Through numerical simulation and field test analysis, it is proved that the range of punching under different perforation velocities can be objectively determined according to the coefficient f and tensile strength of coal body in the numerical simulation study, which provides the parameter support for the field application of the device.
【作者单位】：华北理工大学矿业工程学院;北华航天工业学院;
【基金】：国家自然科学基金资助项目(51374089) 河北省自然科学基金资助项目(E2016209249) 华北理工大学科学研究基金资助项目(Z201619)
【分类号】：TD712.6

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