Results 11 to 20 of about 48,246 (256)
Research on determination method of effective drainage radius of gas drainage borehole
Gong-kuang zidonghua, 2020 In order to solve the problems of complex process and lower accuracy in current determination method of effective drainage radius of gas drainage borehole, a determination method of effective drainage radius was put forward, which is based on the law of ...
LIU Dianping, MA Wenwei
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International Journal of Mining Science and Technology, 2019 The adjustment of the gas drainage rate has an immediate impact on air leakage in gob, thus resulting in the change of self-heating of coal. While regulating the gas drainage parameters, the risk of spontaneous combustion of coal should be considered ...
Tingxiang Chu, Pin Li, Yuexia Chen
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Numerical investigation of flue gas injection enhanced underground coal seam gas drainage
Energy Science & Engineering, 2019 Coal seam with low permeability is widely distributed in China. Injection of flue gas (N2:CO2 = 0.85:0.15) is an effective approach to improve coal seam gas drainage efficiency. This process relates complex responses among ternary gases (CH4, CO2, and N2)
Bingjie Huo +3 more
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An Intelligent Mobile Gas Drainage Pumping Station
Meikuang Anquan, 2020 In this paper, an intelligent mobile gas pumping station is designed. By designing and installing the intelligent monitoring substation and water-softening device on the mobile gas drainage pumping station, the monitoring of various parameters in the ...
MENG Fanrui, ZHAO Yong, JING Yanbo, ZHAO Guoyong, SHAO Jirong, REN Zhichao
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Evolution and application of in-seam drilling for gas drainage
International Journal of Mining Science and Technology, 2013 Abstract The presence of seam gas in the form of methane or carbon dioxide presents a hazard to underground coal mining operations. In-seam drilling has been undertaken for the past three decades for gas drainage to reduce the risk of gas outburst and lower the concentrations of seam gas in the underground ventilation.
Hungerford, Frank, Ren, Ting, Aziz, Naj
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International Journal of Mining Science and Technology, 2018 Gas emissions of workfaces in steeply inclined and extremely thick coal seams differ from those under normal geological conditions, which usually feature a high gas concentration and a large emission quantity.
Liu Cheng, Li Shugang, Yang Shouguo
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Study on the effective drainage range of long horizontal borehole for goaf gas drainage
Energy Science & EngineeringLaying long horizontal borehole (LHB) in mining‐induced strata fractures for coal‐bed gas drainage in the goaf is a pivotal method for eliminating safety hazards, preventing atmospheric pollution, and realizing gas utilization.
Mingjie Guo +4 more
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Experimental study of generalized stress relaxation of rock based on 3D-DIC technology
Rock and Soil Mechanics, 2021 Based on the visual triaxial compression servo-control test system and the three-dimension digital image correlation technology (3D-DIC), the generalized stress relaxation tests under different rheological regions were carried out, and the evolution of ...
XU Jiang +5 more
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Study on coalbed methane flow characteristics based on fractal bifurcation fracture network model
Frontiers in Earth Science, 2023 The geometric structure and distribution of the fracture network significantly impact the coalbed methane flow characteristics. The indoor optical microscope test is utilized to analyze the distribution and structural characteristics of natural fractures
Shuzhen Jiang +11 more
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Experimental Determination on Shale Gas Loss During the Coring Process in Eastern Sichuan Basin
Frontiers in Energy Research, 2020 Shale gas loss by leakage directly affects the accurate measurement of shale gas content during drilling and coring. To accurately calculate shale gas loss, in combination with the actual situation of the shale coring, considering the influence factors ...
Junbo He +8 more
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