Results 21 to 30 of about 51,330 (256)
Preparation and Sealing Performance of a New Coal Dust Polymer Composite Sealing Material
Advances in Materials Science and Engineering, 2018 In this study, a new coal-dust polymer composite material (CP) was fabricated to improve the borehole gas drainage effect and address the limitations of traditional sealing materials.
Bo Li +3 more
doaj +1 more source
CFX-based numerical simulation of pipeline leakage of coal mine main gas drainage system
矿业科学学报, 2021 To understand the pipeline leakage characteristics of the large-scale main gas drainage system in coal mines and the multi-physical fields of the gas flow in pipeline, a three-dimensional numerical model is developed based on Ansys CFX and the process of
Cai Jitao +4 more
doaj +1 more source
Research of Drainage Gas Recovery Technology in Gas Wells
Open Journal of Fluid Dynamics, 2014 Drainage gas recovery technology is the main method of gas recovery process in gas field, which has domestically and internationally been the main gas recovery processing measure in later stage of gas field production. In this context, produced water or condensate liquid will not be carried out of pit shaft by natural gas with the gradual drop of ...
Shuren Yang +4 more
openaire +2 more sources
Design of gas drainage monitoring system based on S7-1500R redundancy technology
Meikuang Anquan, 2022 For the problems that the PLC controller failure in the gas drainage monitoring system makes the monitoring system unable to monitor and control the gas drainage system, a gas drainage monitoring system based on S7-1500R redundant PLC is designed ...
WANG Zuxun, CHENG Yulong
doaj +1 more source
Gas control technology of directional high-level long borehole at upper corner
Gong-kuang zidonghua, 2020 For problems that normal roof high-level borehole hardly drilled to design position because borehole direction and dip-angle cannot be controlled, and had short effective extraction hole segment, many drainage blind areas, discontinuous drainage and so ...
BAI Gang, YANG Zhong, DUAN Huiju
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Application of gas drainage technology with separated sources in steep thick seam
Gong-kuang zidonghua, 2014 In order to solve problems of gas overrunning in No.735 Coal Mining Face of Dahuangshan Mine, a gas drainage technology with separated sources was put forward based on analysis of main sources of gas emission of the coal mining face, that is, gas in goaf
CHEN Xinrun, HOU Tiejun, ZHAO Yunfeng
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Study on Gas Control in Goaf of High Gas Coal Seam: A Case Study of Tingnan Coal Mine, China
Geofluids, 2022 When stratified mining is used in extrathick coal seam, the gas emission in goaf of the first mining face is large, and it is easy to cause gas overrun in the upper corner during the rapid advance of the working face, which seriously affects the safe and
Jiamei Chai
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Research on effective drainage radius and rational borehole spacing of parallel boreholes
Gong-kuang zidonghua, 2019 In order to determine rational borehole spacing of parallel boreholes for gas drainage, a fluid-solid coupling model of gas drainage was established by deducing gas migration equation of coal seam, deformation equation of coal and rock, and coupling ...
SANG Naiwen, YANG Shengqiang, SONG Yawei
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Research and application of intelligent decision-making platform for gas excavation from standard
Meikuang Anquan, 2022 In order to solve the defects of low intelligence in gas drainage and control, imperfect gas prevention and control information, and ignoring data analysis and situation prediction in gas drainage model, a set of intelligent decision-making platform for
10.13347/j.cnki.mkaq.2022.03.017 +6 more
doaj +1 more source
Advanced Functional Materials, EarlyView.Edible electronics needs integrated logic circuits for computation and control. This work presents a potentially edible printed chitosan‐gated transistor with a design optimized for integration in circuits. Its implementation in integrated logic gates and circuits operating at low voltage (0.7 V) is demonstrated, as well as the compatibility with an ...
Giulia Coco +8 more
wiley +1 more source