Results 51 to 60 of about 3,109 (220)
Energy Science &Engineering, EarlyView.One‐way FLAC3D‐COMSOL coupled modeling and field validation show that a 150 mm borehole radius with 5 m spacing provides the best coordination of plastic‐zone expansion, stress relief, permeability enhancement, and gas‐pressure attenuation, increasing the pure gas drainage rate by 35.4%. ABSTRACT To rationally determine the borehole radius and borehole
Yewu Bi +7 more
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Research progress of coal and gas outburst mechanism based on geological structure
Meikuang Anquan, 2022 Aiming at the problem of coal and gas outburst in the process of coal mining in China, this paper first summarizes the research progress of coal and gas outburst mechanism, and points out that the research on outburst mechanism of tectonic belt is of ...
ZHAO Junli, WANG Wenyuan, YANG Wei
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Foamed Concrete Sealing Materials for Coal Seam Gas Drainage Boreholes: A Review
Safety Science and Technology, EarlyView.This study investigates the sealing performance of foamed concrete in gas drainage boreholes. By comparing leakage pathways (a, c) with sealed systems (b, d), the research demonstrates how foamed concrete effectively fills mining‐induced fractures and resists deformation.
Jiaxing Zou +6 more
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Meitan xuebaoA large amount of gas rapidly released during coal and gas outburst is an important cause of dynamic effects such as outburst shock waves and coal-gas two-phase flow.
Jie CAO +4 more
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Coal and gas outburst features in Guizhou mining areas and its prevention countermeasures
Gong-kuang zidonghua, 2016 With collection and analysis of outburst indexs in 381 mines and 695 seams and 214 coal and gas outburst accidents occurred in 120 mines in Guizhou mining areas, a study on coal and gas outburst index distribution features and outburst features in ...
KONG Que +3 more
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Controlling effect of tectonic stress field on coal and gas outburst
Meitan xuebao, 2023 To investigate the controlling effect of tectonic stress field on coal and gas outburst, the gas geology, tectonophysics and rock mechanics methods were applied to analyze the influences of tectonic stress field on tectonic coal, in-situ stress and coal ...
Deyong GUO +3 more
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Coupling Technology of Deep‐Hole Presplitting Blasting and Hydraulic Fracturing Enhance Permeability Technology in Low‐Permeability and Gas Outburst Coal Seam: A Case Study in the No. 8 Mine of Pingdingshan, China [PDF]
, 2021 Wei Wang +3 more
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Green Developmentalism? The Political Economy of Hydropower in India in the 21st Century
Development and Change, Volume 57, Issue 4, Page 649-679, July 2026.ABSTRACT This article critically examines the political economy of hydropower in India since its global reconfiguration as ‘green energy’ in the early 2000s. While an opportune convergence of interests among key global, national and subnational stakeholders contributed to the greening of hydropower in India, this reframing did not produce the expected ...
Vasudha Chhotray, Harsh Vasani
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Energies, 2018 Coal and gas outburst is one of the major serious natural disasters during underground coal, and the shock air flow produced by outburst has a huge threat on the mine safety. In order to study the two-phase flow of a mixture of pulverized coal and gas of
Haitao Sun +7 more
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EDEM-FLUENT coupled simulation of coal-gas outburst two-phase flow
Energy Exploration & Exploitation, 2021 In the process of coal-gas outburst, the gas-solid two-phase flow of pulverized coal and gas will induce large-scale damage to underground mining. In this work, in order to study the dynamic evolution law of gas-solid two-phase flow of coal-gas outburst,
Feng Du +5 more
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