Results 1 to 10 of about 359,678 (168)
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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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
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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
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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
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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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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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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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International Journal of Coal Science and TechnologyTo enhance the efficiency and cost-effectiveness of coal seam gas extraction in coal mines, this study introduces an integrated approach combining drilling, hydraulic punching, and fracturing technologies. This method optimizes drilling media tailored to
Jinxing Song, Zhenjiang You, Xianbo Su
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Design and Optimization of 200 Ton H- Type Hydraulic Press [PDF]
E3S Web of Conferences, 2021 A hydraulic press is a machine using a hydraulic cylinder to generate a compressive force. The hydraulic press works on Pascal’s principle, which states that the pressure throughout a closed system is constant.
Rani G. Jamuna +3 more
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Meitan kexue jishu, 2022 In order to improve the gas pre-drainage efficiency of medium hard coal seam with high gas and low permeability, the applicable conditions, advantages and disadvantages of hydraulic piercing, hydraulic fracturing and hydraulic cutting seam anti ...
Yongzhi TANG +8 more
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