Critical parameters investigation of rock breaking by high-pressure foam fracturing method

Cui, Song; Liu, Songyong; Li, Hongsheng; Zhou, Fangyue; Sun, Dunkai

doi:10.1016/j.energy.2022.124871

Cited by 10 publications

(3 citation statements)

References 43 publications

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“…Researchers have already analyzed it. Cui et al [34] reported a high-pressure foam fracturing method, which is a new mild rock-breaking method between high-stress loading rate blasting and low-stress loading rate hydraulic fracturing and has the advantages of no sparks, less dust, no harmful gases, and controllable rock-breaking shapes. Xiaoqiang et al [35] developed a rock-breaking gas generator, and by carrying out on-site rock-breaking tests, monitoring its vibration, extracting the main component of the gas-blasting signal, and analyzing the time-frequency characteristics of the diferent components of the signal, it was found that this new type of rock-breaking gas generator blasting technology has a signifcant efect of vibration reduction and damage reduction and it is suitable for popularizing the application of earth blasting projects.…”

Section: Discussionmentioning

confidence: 99%

“…(3) With reference to the Chinese engineering classifcation of rock mass (GB/T 50218-2014), a new method of rock mass classifcation for tuf tunnels applicable to the high-pressure gas expansion method is proposed, which classifes the surrounding rock into fve grades and gives suggestions for the engineering application of diferent surrounding rock grades. Figure 5: High-pressure expansion rock-breaking method: (a) high-pressure foam fracturing [34] and (b) rock-breaking gas generator [35].…”

Section: Discussionmentioning

confidence: 99%

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A Rock Mass Classification Method for Tuff Tunnel Based on the High-Pressure Gas Expansion Method

Peng,

Li,

Sheng

et al. 2023

Journal of Engineering

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A precise rock mass grade result is crucial for directing the tunnel excavation engineering design. A novel rock mass classification method for tuff tunnel based on the high-pressure gas expansion method (HPGEM) was proposed, which was primarily built on field test data previously acquired by the research team. The main achievements are as follows: combined with field data and the HPGEM rock-breaking theory, analyzing the rock uniaxial compressive strength, rock mass integrity index, and the relationship between the gas generator unit consumption and fitted the relevant equations. After that, the rock optimal uniaxial compressive strength (about 150 MPa) and the rock integrity factor (about 0.85) were obtained. With reference to the BQ rock mass classification method, a new rock mass classification method that applied to HPGEM was proposed. This study fills the gap of the appropriate rock mass classification method requested on HPGEM.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

A Rock Mass Classification Method for Tuff Tunnel Based on the High-Pressure Gas Expansion Method

Peng,

Li,

Sheng

et al. 2023

Journal of Engineering

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“…Wang et al (2021) proposed a shearer drum with an abrasive slurry jet, and studied the effects of multiple parameters on the rock-breaking ability of the abrasive slurry jet combined with picks through orthogonal experiments. Cui et al (2022) studied breaking characteristics of rock samples with size of 700 mm×700 mm×700 mm by using a high-pressure foam fracturing device. The effects of well depth, seal length and foam pressure were analyzed.…”

Section: Introductionmentioning

confidence: 99%

Analysis of dynamic characteristics of an experimental bench of high-pressure water fracturing assisted cutting

Liu¹,

Zhang²,

Sun³

et al. 2023

Journal of Theoretical and Applied Mechanics

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Aiming at the problem that the cutting efficiency of a drum shearer is low when mining hard coal seams, an experimental bench of high-pressure water fracturing assisted cutting is designed. Compared with normal ones, the maximum equivalent stress of the improved experimental bench is reduced by 55.38%, and the maximum total deformation is reduced by 27.23%. According to the results of dynamic response analysis, it is concluded that the experimental bench of high-pressure water fracturing assisted cutting is stable and reliable under extreme working conditions, and meets design requirements for strength and stiffness.

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Electrochemical Investigation of Plasma Channels During Hydraulic‐Electric Pulsed Discharges

Liu,

Zhou,

Zhang

et al. 2024

Contrib. Plasma Phys

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The hydraulic‐electric pulsed discharge(HEPD) rock‐breaking technology is a new high‐efficiency technology that generates plasma shock waves to rupture rocks. Since the plasma channel formation mechanism involved in HEPD rock‐breaking technology is difficult to describe, there are fewer theoretical models of this technology. This paper establishes a HEPD plasma model, which integrally considers the mutual coupling between five physical fields. The multi‐physical field model realizes the whole process of plasma channels, breakdown channels, plasma shock waves, and plasma shock wave rock‐breaking during the HEPD. The changes in mass fraction, density, and diffusion flux of relevant elements in the electrochemical reaction equation of the plasma channel are comprehensively analyzed. The obtained plasma multiphysics field model shows that the interpenetration of charged ions forms the breakdown channel and plasma channel. The anion number density is related to the H‐ number density, and the decrease in H‐ number density is due to the fact that the energy in the plasma channel is not sufficient to satisfy the relevant chemical equations to continue the collision reaction. The damage to the rock by the plasma shock wave takes the form of a gradual spreading of the plasma shock wave from the center of the rock to the edges, which leads to rock fragmentation. The model has the potential to establish a link between HEPD rock‐breaking parameters and the efficiency of HEPD rock‐breaking, which could provide a practical way for the development and parameter optimization of hydraulic‐electric pulsed discharge rock‐breaking tools.

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Critical parameters investigation of rock breaking by high-pressure foam fracturing method

Cited by 10 publications

References 43 publications

A Rock Mass Classification Method for Tuff Tunnel Based on the High-Pressure Gas Expansion Method

A Rock Mass Classification Method for Tuff Tunnel Based on the High-Pressure Gas Expansion Method

Analysis of dynamic characteristics of an experimental bench of high-pressure water fracturing assisted cutting

Electrochemical Investigation of Plasma Channels During Hydraulic‐Electric Pulsed Discharges

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