Energy Science and Engineering, 2023 Aiming at the application of hydraulic punching technology in soft, low permeability, and high gas coal seams in Changping Coal Mine, there are problems such as large workload, poor permeability enhancement effect, and the formation of “blank zones” in ...
Xiangjun Chen
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Investigation on the design of hydraulic high-speed punching press with a large press force and a long press stroke [PDF]
Advances in Mechanical Engineering, 2016 High-speed punching presses are widely applied in modern manufacture industry, especially in occasions of automatic production with a large or a super large quality.
Shiqiang Zhu, Hongjun Pan
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Research on Optimization of Large Flow Hydraulic Punching Process in Zhaozhuang Mine
Geofluids, 2022 Taking hydraulic punching test of Zhaozhuang Mine as engineering background, by comparing the field application effects of different hydraulic punching processes, the relationship between coal moisture content around the borehole blockage and gas ...
Jiabao Zhang, Dingqi Li
doaj +2 more sources
The mechanism of permeability enhancement of coal seams by hydraulic fracturing based on the characterization of coal physical properties [PDF]
Scientific ReportsTo further understand the mechanism of pressure relief and permeability enhancement in coal seams through hydraulic punching, this study employs microscopic testing methods such as porosity testing, spectral analysis, and image scanning, combined with ...
Xun Zhao +9 more
doaj +2 more sources
Energy Reports, 2023 In order to determine the reasonable spacing of gas extraction holes under the increase permeability measures of hydraulic punching taking Jiuxin Coal Industry of Jincheng Mining Area as the engineering background, COMSOL Multiphysics numerical software ...
, Xiangjun Chen
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Research and Application of Hydraulic Punching Pressure Relief Antireflection Mechanism in Deep “Three-Soft” Outburst Coal Seam [PDF]
Shock and Vibration, 2021 To solve the problems of gas predrainage in deep seams with “three softs” and low-air permeability, hydraulic punching pressure relief antireflection technology is proposed on the basis of the research background of gas predrainage technology in Lugou ...
Beifang Gu, Yanling Wu
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Experimental study and field application of hydraulic flushing technology in soft coal seam [PDF]
Scientific ReportsTo enhance the safety of coal mining operations and improve the efficiency of gas extraction, hydraulic flushing technology has been widely used in low permeability coal seams.
Xun Zhao +7 more
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Design & Simulation of PLC Control and Electro-Hydraulic System for a Punching Machine [PDF]
Engineering and Technology Journal, 2009 Automatic control has become an important and integral part of modernmanufacturing and industrial processes .Automatic control provide means for attainingoptimal performance of dynamic systems, improve the quality and lower the cost ofproduction, expand ...
Majid A. Oleiwi +2 more
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Influence of Hydraulic Domain on Vibration Control and Overload Prediction of High-Speed Punching Press: Multidomain Modelling and Experiment [PDF]
Shock and Vibration, 2019 By the multidomain modelling method, the vibration of a high-speed punching press was modelled and simulated, and the influence of the hydraulic system on the vibration of the punching press and the protection efficiency of the punching press under the ...
Teng Xu +5 more
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Gong-kuang zidonghua, 2020 Current research on hydraulic punching technology seldom considers that pressure relief range of hydraulic punching in inclined coal seam varies with direction and influence of coal seam inclination on the effective radius of hydraulic punching pressure ...
HUA Mingguo, YAO Banghua, LI Jianwei
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