Results 21 to 30 of about 555 (166)
Vibroacoustics Analysis of Punching Machine Hydraulic Piping
Procedia Engineering, 2015 AbstractThe reduction of elevated dynamic loads, affecting the elements of the hydraulic drive, is an important task in production equipment maintenance. In case of the hydraulic drive with actuators, remotely located from the power source, the piping defines the working capacity of the whole system.
Georgy Makaryants
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Meikuang Anquan, 2023 At present, in drilling design and evaluation, the shape of hydraulic flushing hole is usually equivalent to cylinder, which is one of the important bases to determine the effective extraction radius.
LIU Xiao, JING Tianxiang, XUAN Dequan, HU Shixiong, LI Yong1, XU Sen
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Hydraulic fracturing and punching integration enhanced permeability gas extraction technology
Gong-kuang zidonghuaThe existing hydraulic fracturing, hydraulic punching, hydraulic slotting, hydraulic cutting and other underground hydraulic permeability enhancement technologies in coal mines have complex processes, single adaptability conditions, and high labor ...
WANG Baogui
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Shock and Vibration, 2020 Hydraulic punching technology has recently developed into an effective pressure relief measure and permeability enhancement method for soft and low permeability coalbeds.
Dongdong Xu +3 more
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Meikuang AnquanWith the increasing depth of coal mining and the difficulty of gas control in China, the technology of directional hydraulic punching to enhance gas extraction in composite coal seam has been widely promoted and applied.
Yi LIU, Dingqi LI, Yubo CHEN
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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 +2 more
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Meikuang AnquanIn response to the difficult problem of gas control in soft and low permeability outburst coal seam, gas control technology is proposed to use physical modification hydraulic punching to improve permeability. Theoretical calculations and FLAC3D numerical
Shuai ZHANG
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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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Technology and equipment of preventing gas overrun in drilling operation of outburst coal seam
Meikuang Anquan, 2021 Aiming at the problem of gas gushing hole during the construction of through layer drilling(hydraulic punching), the factors that easily cause gas overrun in the working space during the hydraulic punching operation are analyzed and determined.
HAO Dian, LI Xuechen, WEI Peijin
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