Results 11 to 20 of about 6,194 (127)

Numerical simulation study on gas drainage by interval hydraulic flushing in coal seam working face

Energy Exploration & Exploitation, 2021
In order to solve the problem of difficult gas extraction in coal mine, a method of gas extraction from coal seam by interval hydraulic flushing is put forward.
Shengrong Xie, Junqi Cui, Dongdong Chen, Ping Chen   +3 more
doaj   +1 more source

Influence of interlayer channeling of composite reservoir on gas drainage

Meikuang Anquan, 2022
In order to investigate the influence of surrounding rock characteristics on gas drainage of through layer borehole in composite reservoir, the seepage law of gas in coal seam and rock stratum is analyzed.
ZHANG Zhiyuan, ZHU Chuanjie, LIU Siyuan, LI Long   +3 more
doaj   +1 more source

Study and application on influence mechanism of instability and collapse of drainage borehole on gas drainage

Meitan xuebao, 2023
The instability and collapse of drainage boreholes is one of the key problems that hinder the efficient extraction of coal-bed methane (CBM). In order to solve the problem of instability and collapse of extraction boreholes in soft coal seams, based on ...
Xuebo ZHANG, Hao WANG, Ming YANG, Pan WANG, Linxiu HAN   +4 more
doaj   +1 more source

Numerical Simulation of Gas-Solid Coupling in Pressure-Relief Gas Drainage of Short-Distance and Underprotective Steeply Inclined Coal Seam Mining

Geofluids, 2022
The accuracy of the drainage radius plays a vital role in the gas drainage effect, and the establishment of the drainage model and numerical calculation of the model has an essential value for the accurate determination of the drainage radius.
Xinshan Peng, Zhaofeng Wang, Lingling Qi
doaj   +1 more source

Numerical Simulation of Effective Extraction Radius of Pre-Drainage Borehole Based on Coal Damage Model

Sustainability, 2023
Borehole pre-drainage is an important technical means to control a coal mine gas disaster. In order to determine the optimal pre-drainage parameters of Dashucun mine, a coal damage permeability evolution model was established based on coal damage deformation, considering gas adsorption and desorption and the Klinkenberg effect, and a damage fluid ...
Dangyu Zhang, Minbo Zhang, Shilong Zhang, Zichao Wang, Yan Jin, Rentao Liu   +5 more
openaire   +1 more source

Experimental Study on Reasonable Spacing after Carbon Dioxide Presplitting in Low-Permeability Coal Seam

Advances in Civil Engineering, 2021
Gas disasters have been always a major hidden danger that affects mining safety in coal mines. Gas drainage by drilling is the fundamental method of gas control in coal mines.
Zongyong Wei, Shugang Li, Haifei Lin, Botao Li, Yang Ding, Haiqing Shuang   +5 more
doaj   +1 more source

Study on effective extraction radius of bedding borehole under the impact of normal fault

Gong-kuang zidonghua, 2022
The reasonable effective extraction radius of borehole is the key to ensure gas extraction effect. However, the research of effective extraction radius mainly focuses on the measurement method of effective extraction radius of borehole, and there is a ...
JIANG Mingquan, KANG Xiangtao, YAN Chaoxing, TANG Meng, WANG Ziyi   +4 more
doaj   +1 more source

Study and application of reasonable parameters for hydraulic punching of layer penetration boreholes in Changping Coal Mine

Energy Science & 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 ...
Rui Min, Xiangjun Chen, Lin Wang, Zhen Huang, Haitao Li   +4 more
doaj   +1 more source

Research and Application of Hydraulic Punching Pressure Relief Antireflection Mechanism in Deep “Three-Soft” Outburst Coal Seam

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
doaj   +1 more source

Experimental and numerical investigation of flow distribution pattern at a T-shape roadway crossing under extreme storms

Engineering Applications of Computational Fluid Mechanics, 2022
A major drainage systemwhich uses urban roadways as flood passages during extreme storm events has been proven to be effective and low-cost. However, to date, the amount of flow diverted at a bifurcating road crossing still could not be accurately ...
Wang Feng, Zhiyu Shao, Huafeng Gong, Lei Xu, Scott A. Yost, Haiyuan Ma, Hongxiang Chai   +6 more
doaj   +1 more source