Results 31 to 40 of about 555 (166)
Thermal-hydraulic performance of solar receiver duct with inclined punched-ribs and grooves
Case Studies in Thermal Engineering, 2022 The article presents an experimental study on turbulent airflow friction and thermal behaviors in a solar receiver heat exchanger duct mounted with combined inclined chamfered-groove and turbulators. The experimental work was conducted for Reynolds numbers from 5,300 to 24,000, based on the hydraulic duct diameter.
Nuthvipa Jayranaiwachira +3 more
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Process simulation and application of hydraulic cavitation while drilling technology
Meikuang Anquan, 2022 In improving the efficiency of gas extraction from soft and low permeability coal seams, the traditional hydraulic punching method requires drilling, lifting the auger, lowering the hole-making device, lifting the auger and then lowering the screen pipe
DUAN Heming +4 more
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Application of integrated drilling and stamping technology in gas extraction through layer drilling
Energy Exploration & Exploitation, 2022 In coal mine gas extraction in China, the current hydraulic permeability enhancement measures generally have complex processes, low adaptability, long operation time, and high labor intensity.
Jinxing Song +3 more
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Geofluids, 2022 Owing to the exhaustion of shallow coal resources, deep mining has been occupied in coal mines. Deep buried coal seams are featured by the great ground stress, high gas pressure, and low permeability, which boost the risk of gas disasters and thus ...
Chaojun Fan +4 more
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Meikuang Anquan, 2023 The broken and soft coal seam has high gas content and poor permeability. The single hole drainage radius is small when the conventional through-bed drilling is used for gas drainage, and the drilling engineering volume is large.
Tao PANG +5 more
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Research Status and Prospect of Coal and Gas Outburst Prevention and Control by Hydraulic Technology
Meikuang Anquan, 2020 Coal seam pressure relief and permeability increase is an effective means to prevent coal and gas outburst, coal and rock mass structure transformation is the core problem of coal seam pressure relief and permeability increase, hydraulic technology is ...
CAO Yaolin
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Research on full-life cycle gas treatment technology based on floor rock roadway
Gong-kuang zidonghua, 2023 For mines lacking conditions for mining protective layers, pre extraction of coal seam gas from floor rock roadway strips is the mainstream gas control method.
ZHAI Cheng, TANG Wei
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Research and Optimization of Gas Extraction by Crossing-Seam Boreholes from Floor Roadway
Geofluids, 2021 Deep coal seams are characterized by large stress, high gas pressure, and low permeability. The gas disaster threatens the safe production of coal mine seriously.
Gang Li, Jiafei Teng
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Pressure relief law and application of deep-buried high-stress bedding coal by hydraulic flushing
Gong-kuang zidonghua, 2022 In order to solve the problem of the high risk of coal and gas outburst in deep coal working face, taking 12090 working face of Shoushan No.1 Coal Mine as the engineering background, the paper analyzes the deformation and stress variation law of coal ...
ZHANG Jianguo, ZHAI Cheng
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Control effect of thickness ratio of soft and hard composite coal seam on unloading failure
Meikuang Anquan, 2023 In the engineering practices of coal seam mining and gas drainage, the unloading damage of soft and hard composite coal seam is a common problem faced by surrounding rock support and coal seam enhancement.
LIU Hongyong, LI Zhen, YANG Jianmin, LI Longfei, ZHENG Chunshan
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