Results 21 to 30 of about 66,002 (291)
Research of precise pushing control scheme for hydraulic support and its applicatio
Gong-kuang zidonghua, 2017 For problems of poor control precision of hydraulic system of hydraulic support and inconsistent step distance of support pushing, a precise pushing control scheme for hydraulic support was put forward.
WANG Feng
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Dynamic correlation technology of wireless control device for hydraulic support
Gong-kuang zidonghua, 2018 In order to solve problem of safety operation of wireless control device for hydraulic support, working principle of the wireless control device for hydraulic support was analyzed, and a scheme of dynamic correlation of the wireless control device for ...
NIU Yicun
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Research on electro-hydraulic control system for hydraulic support at coal mine
Procedia Earth and Planetary Science, 2009 AbstractBased on the investigation and analysis of the situation in full mechanized coal mining face at home and abroad, the electro-hydraulic control system for hydraulic support is put forward, designed and realized. It adopted intrinsically safe circuit design technology and field bus technology to connect all control units to the host computer ...
Yuesen, Yu +4 more
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Optimal design of balance jack control loop of hydraulic support
Gong-kuang zidonghua, 2018 Principles and shortcomings of balance jack control of hydraulic support by use of compensation valve, high pressure internal overflow valve, floating two-way lock and automatic balance valve respectively were analyzed, and an optimal design scheme of ...
CAO Lianmin +7 more
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Software defect management of electro hydraulic control system of hydraulic support
Gong-kuang zidonghua, 2016 For software defect problem of electro hydraulic control system of hydraulic support, software structural features of the electro-hydraulic control system were analyzed from software testing method, software defect management framework was built, software testing schema was determined, and database structure of software defects database and software ...
NIU Jianfeng, BAI Yongsheng, GUO Dinghe
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Fatigue Behavior of a Box-Type Welded Structure of Hydraulic Support Used in Coal Mine [PDF]
Materials, 2015 Yanjun Fan
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Gong-kuang zidonghua, 2022 The intelligent working face has abnormal working conditions such as lost support, uneven straightness, and support skew after the automatic following of hydraulic support. Therefore, manual regulation and control are needed.
ZHANG Jintao +3 more
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Comparative Analysis of High Water Hydraulic Fluid for Hydraulic Support [PDF]
International Journal of Oil, Gas and Coal Engineering, 2021 In view of the use and existing problems of high water cut hydraulic fluid for hydraulic support in Shendong mining area, the water quality of each mine in Shendong mining area was analyzed. The influence of mine water quality on hydraulic fluid was analyzed, including the influence of water hardness, the influence of impurities in water, the influence
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Applied Sciences, 2023 Solid backfilling is an environmentally friendly method of coal mining. Backfilling hydraulic supports are important devices in solid backfill mining. In order to speed up the design and manufacturing process of them, this paper proposes a method of hydraulic support reformation and evaluation. The mechanical models of top-coal caving hydraulic support
Qiang Zhang +4 more
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Uncertainty in the determination of soil hydraulic parameters and its influence on the performance of two hydrological models of different complexity [PDF]
, 2009 Data of soil hydraulic properties forms often a limiting factor in unsaturated zone modelling, especially at the larger scales. Investigations for the hydraulic characterization of soils are time-consuming and costly, and the accuracy of the results ...
Facchi, A. +18 more
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