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本文给出了在煤和岩石上打眼所需的脉冲水射流压力的估计。利用F、J、Heymann的估计冲击波速度的方法,考虑到岩石的破坏应力,体积抗压模量,以及岩石和射流的声阻抗,介绍了孔穴形成和破坏所需的水射流速度的解析确定。本文包含为提供所需的水射流速度,确定脉冲水炮炮筒内压力的方程式。炮筒内压力是在考虑到流体可压缩性和脉冲射流速度损失的情况下确定的。文章也包括为破碎煤和某些库兹巴斯矿层(苏联)以及各种岩石所需的炮筒内压力和射流速度的计算。依靠分析所获得的成果,作者所得的结论是通过改变水炮炮筒内压力脉冲的形状,与实验获得的压力位相比降低破碎煤和岩石所需的压力是可能的。考虑到给出改进水炮炮筒内压力脉冲形成的方法。多次试验结果证明,从能量要求的观点来看,硬而脆的岩石更适宜于用脉冲射流破碎,
This article gives an estimate of the pressure of the pulsed water jet needed to drill the eye on coal and rock. Based on the method of estimating the shock wave velocity by F, J and Heymann, taking into account the failure stress of rock, the compressive modulus of rock, and the acoustic impedance of rock and jet, the water jet velocity required for pore formation and failure is analyzed. This article contains equations that determine the pressure inside a pulsed water gun barrel to provide the required water jet velocity. The barrel pressure is determined taking into account the fluid compressibility and the pulse jet velocity loss. The article also includes the calculation of the pressure and jet velocity inside the barrel required for the crushing of coal and some of the Kuzbass deposits (Soviet Union) and various rocks. Based on the analysis of the results obtained, the authors concluded that by changing the shape of the pressure pulse in the gun barrel, it is possible to reduce the pressure required to break the coal and rock compared to the experimentally obtained pressure. Consider giving a way to improve the pressure pulse formation in the gun barrel. Multiple test results show that from the energy requirements point of view, hard and brittle rock is more suitable for pulsed jet pulverization,