Development of a hydraulically controlled piston-pressurized pulsed water jet device and its application potential for hard rock breaking

A high-pressure water jet can break rock efficiently, which is of great potential to overcome the problems of a tunnel boring machine (TBM) in full-face hard rock tunnel digging, such as low digging efficiency and high disc cutter wear rate. Therefore, this paper presented a new tunneling method that is a TBM coupled with a high-pressure water jet. The rock failure mechanism under the coupled forces of a disc cutter and water jet was analyzed at first. Then, the finite element method (FEM) and smoothed particle hydrodynamics (SPH) method were used to establish a numerical model of rock broken by the disc cutter and water jet. Effects of parameters on rock breaking performance were studied based on the numerical model. Moreover, an experiment of the water jet cutting marble was carried out to verify the reliability of the numerical simulation. Results showed that the high-pressure water jet can increase the TBM digging efficiency and decrease the forces and wear rate of the disc cutter. The optimum nozzle diameter is 1.5 mm, while the optimum jet velocity is 224.5 m/s in this simulation. The results can provide theoretical guidance and data support for designing the most efficient system of a TBM with a water jet for digging a full-face hard rock tunnel.

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Experimental study of flow field structure of interrupted pulsed water jet and breakage of hard rock

International Journal of Rock Mechanics and Mining Sciences ◽

10.1016/j.ijrmms.2015.06.005 ◽

2015 ◽

Vol 78 ◽

pp. 253-261 ◽

Cited By ~ 26

Author(s):

Yong Liu ◽

Jianping Wei ◽

Ting Ren ◽

Zhaohui Lu

Keyword(s):

Experimental Study ◽

Flow Field ◽

Hard Rock ◽

Field Structure ◽

Water Jet ◽

Pulsed Water Jet

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Experimental Investigation of Hard Rock Breaking Using a Conical Pick Assisted by Abrasive Water Jet

Rock Mechanics and Rock Engineering ◽

10.1007/s00603-020-02168-2 ◽

2020 ◽

Vol 53 (9) ◽

pp. 4221-4230 ◽

Cited By ~ 1

Author(s):

Songyong Liu ◽

Fangyue Zhou ◽

Hongsheng Li ◽

Yueqiang Chen ◽

Fengchao Wang ◽

...

Keyword(s):

Experimental Investigation ◽

Hard Rock ◽

Rock Breaking ◽

Water Jet ◽

Abrasive Water Jet ◽

Conical Pick

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Corrigendum to “Experimental study of flow field structure of interrupted pulsed water jet and breakage of hard rock” [Int J Rock Mech Min Sci (2015) 253–261]

International Journal of Rock Mechanics and Mining Sciences ◽

10.1016/j.ijrmms.2019.02.001 ◽

2019 ◽

Vol 116 ◽

pp. 122

Author(s):

Zhaohui Lu ◽

Michael Hood ◽

Dihon Tadic ◽

Yong Liu ◽

Jianping Wei ◽

...

Keyword(s):

Experimental Study ◽

Flow Field ◽

Hard Rock ◽

Field Structure ◽

Water Jet ◽

Pulsed Water Jet

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Rock Breaking by Conical Pick Assisted with High Pressure Water Jet

Advances in Mechanical Engineering ◽

10.1155/2014/868041 ◽

2014 ◽

Vol 6 ◽

pp. 868041 ◽

Cited By ~ 7

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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The Technical Development for Increasing ROP with Particle Impact Drilling in China

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.904.292 ◽

2014 ◽

Vol 904 ◽

pp. 292-295 ◽

Cited By ~ 1

Author(s):

Jian Zhao ◽

Yi Ji Xu

Keyword(s):

Field Test ◽

Hard Rock ◽

Rock Breaking ◽

Particle Impact ◽

Sound Effect ◽

Deep Well ◽

Working Principle ◽

Hard Formation ◽

Field Test Result ◽

Test Result

Field test of particle impact drilling (PID) technology was firstly carried out in deep well and hard formation in Sichuan province china on Oct. 2013. The test formation was named Xu Jiahe, which was very difficult to penetration. Field test result shows that the ROP (rate of penetration) was nearly doubled by this technology. It indicates that there is a profound application prospect of particle impact drilling, especially for hard rock formation. In this paper, the equipment and working principle was analyzed. The experiment and simulation results showed that the rock breaking efficiency was highly increased by this technology. The details of this field test were presented too in this paper that proved the sound effect of PID.

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