Numerical Simulation and Experimental Study on High-Pressure Water Jet Descaling in Coal Mine Drainage Pipeline

2020 ◽  
Author(s):  
Aiming Wang ◽  
Pengfei Sun ◽  
Ziwei Zhang ◽  
Baomei He ◽  
Guoying Meng ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Experimental Study ◽  
High Pressure ◽  
Coal Mine ◽  
Mine Drainage ◽  
Water Jet ◽  
Coal Mine Drainage ◽  
Pressure Water ◽  
High Pressure Water Jet

Numerical Simulation of Rock Fracture under High Pressure Water Jet

2011 ◽  
Vol 462-463 ◽  
pp. 785-790
Author(s):  
Xiao Hong Li ◽  
Hu Si ◽  
Yan Ming Xie
Keyword(s):  
Numerical Simulation ◽  
High Pressure ◽  
Damage Mechanics ◽  
Rock Fracture ◽  
Dynamic Effect ◽  
Dynamic Contact ◽  
Water Jet ◽  
Contact Method ◽  
Pressure Water ◽  
High Pressure Water Jet

The evolvement of rock fracture is a complicated and nonlinear dynamic problem. On the assumption that rock is homogeneous and isotropic, a numerical model was developed to simulate rock fracture under high pressure water jet based on continuum damage mechanics and nonlinear finite element method. The dynamic effect of rock was simulated by the dynamic contact method under high pressure water jet. The numerical simulation results showed that rock failure occurred within several milliseconds and the evolvement of it was for step under high pressure water jet and that the stress propagation in rock rapidly decayed with the distance from the jet centre. On the whole, the numerical results clearly exhibited the process of rock fracture and the extent of the water jet under high pressure water jet. It was important to the application of jet cutting rock theory and the development of water jet technology.

Experimental Study on Rock Breaking with Impacting Water Jet by Modulation of Chaos

2012 ◽  
Vol 535-537 ◽  
pp. 1751-1754 ◽  
Author(s):  
Chang Liu Tian ◽  
Xue Li Cheng ◽  
Wei Wang
Keyword(s):  
Experimental Study ◽  
High Pressure ◽  
Mass Loss ◽  
Rock Breaking ◽  
Water Jet ◽  
Breaking Effect ◽  
Erosion Depth ◽  
Pressure Water ◽  
High Pressure Water Jet ◽  
Pump Pressure

The experiment focused on the contrast with rock breaking effect of impacting water jet by modulation of chaos and common cavitation jet. Investigated the influences of various water jet parameters and conditions on rock breaking, such as standoff distance, pump pressure, transverse speed and erosion time and the mass loss and erosion depth were measured in the experiment. The results show that the impacting water jet by modulation of chaos can efficiently use the energy of water jet and increase ability in rock-breaking, which will have a wide application prospect in high pressure water jet technology field.

Application of High-Pressure Water Jet in Mine

2014 ◽  
Vol 1033-1034 ◽  
pp. 1323-1326
Author(s):  
Guang Wu ◽  
Jia Hui Song ◽  
Ke Bang Hou ◽  
Cong Dong Wang
Keyword(s):  
High Pressure ◽  
Coal Mine ◽  
Water Jet ◽  
Future Application ◽  
Gas Outburst ◽  
Ground Pressure ◽  
Mine Production ◽  
Pressure Water ◽  
High Pressure Water Jet

The principle of high pressure water jet technology and its unique characteristics and advantages were introduced in this paper, specific applications of the high pressure water jet technology in coal mine production and security aspects were analyzed. It was widely used in coal mine tunneling, preventing and controlling ground pressure and gas outburst, the application of the dedusting fan, cutting the coal mine machine and cleaning and descaling downhole equipment. Finally, the feasibility and safety of the high pressure water jet technology in coal mine was summarized, and the article made prospect for its future application.

Flow-Field and Hydromechanics Analysis of High Pressure Water-Jet Single Nozzle in Radial Horizontal Drilling

2014 ◽  
Vol 952 ◽  
pp. 186-189
Author(s):  
Xian Zhong Yi ◽  
Song Lin Yi ◽  
Hui Shu ◽  
Yuan Qiang Ji ◽  
Sheng Zong Jiang
Keyword(s):  
Numerical Simulation ◽  
High Pressure ◽  
Flow Fields ◽  
Rock Breaking ◽  
External Flow ◽  
Water Jet ◽  
Pressure Water ◽  
Jet Nozzle ◽  
High Pressure Water Jet ◽  
Radial Drilling

The technology of high pressure water jet in radial drilling has currently been used widely at home and abroad. A numerical simulation and analysis of the internal and external flow fields of jet nozzle will 1ay the foundation for the further study of high pressure water jet rock breaking. The physical and mathematical models of axial-symmetrical submerged jet rock breaking with single nozzle were established. And a numerical simulation of the internal and external flow fields of high pressure water jet nozzle in radial drilling was conducted with the Fluent software. The 1aws of the internal and external flow fields were analyzed in different jet distances and inlet flow rates.

scholarly journals Rock Breaking by Conical Pick Assisted with High Pressure Water Jet

2014 ◽  
Vol 6 ◽  
pp. 868041 ◽  
Author(s):  
Liu Songyong ◽  
Chen Junfeng ◽  
Liu Xiaohui
Keyword(s):  
Numerical Simulation ◽  
High Pressure ◽  
Hard Rock ◽  
Rock Breaking ◽  
Water Jet ◽  
Cutting Efficiency ◽  
Conical Pick ◽  
Pressure Water ◽  
High Pressure Water Jet ◽  
Better Than

In the process of hard rock breaking, the conical pick bears great cutting force and wear, and the cutting efficiency is lower. Thus different combination ways of water jet and conical pick were proposed to solve this issue; for instance, water jet placed in the front of pick (JFP) and water jet through the center of pick (JCP) was researched by numerical simulation and experiments in this paper. First, the models of rock breaking were built based on SPH combined with finite element method. Then, the stress distribution of rock and the cut force of pick were analyzed when the rock broken by the conical pick assisted with the high pressure water jet. It indicates that the effect of the JCP on rock breaking is better than the JFP. At last, experiments about rock breaking with a conical pick and the JCP were conducted to verify the reliability of the simulation. It indicates that the rock breaking with the assistance of high pressure water jet cannot only reduce the pick force, but also increase the rock crushing volume.

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