Results 81 to 90 of about 7,021 (250)

Multiphysics Coupled Response of Stress and Seepage in Coal Under Borehole Disturbance and Optimization of Borehole Parameters

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, Yichen Li, Yangyang Guo, Yikai Zhang, Jiazhi Sun, Kangnan Li, Yongpeng Fan, Qixian Li   +7 more
wiley   +1 more source

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, WU Guiyi, ZHONG Feng, CHEN Jiming   +3 more
doaj   +1 more source

Study on Roof‐Control Technology for Gob‐Side Entry Retaining Under Composite Roofs

Energy Science &Engineering, EarlyView.
This study develops a roof‐control technology system for gob‐side entry retaining under composite roofs. By integrating field measurements, theoretical analysis, and numerical simulation, it reveals the spatiotemporal evolution of the plastic zone and proposes a targeted support method, providing theoretical and practical guidance for safe and ...
Dong Li, Yujiang Zhang, Yunlou Du, Haodong Zheng, Baoji Yang   +4 more
wiley   +1 more source

Study on Relationships between Coal Fractal Characteristics and Coal and Gas Outburst [PDF]

, 2011
The influence factors for the coal and gas outburst can be divided into two categories. They are external factors and internal factors, respectively. The external factors include in-seam gas pressure, geological structure and so on, while the internal ...
Zhang, S., Zhang, B., Cheng, Jianwei, Yang, S., Cheng, J., Lu, C.   +5 more
core   +2 more sources

High Precision Prediction Model of Wind Speed for Underground Mine Tunnel by Using ASTF Net

Energy Science &Engineering, EarlyView.
This paper proposes an Adaptive Spectral‐Temporal Fusion Net (ASTF‐Net), which features a novel decomposition‐ensemble framework with adaptive feature fusion. This design deliberately balances spectral and temporal features and effectively boosts prediction accuracy in complex ventilation environments. ABSTRACT An Adaptive Spectral‐Temporal Fusion Net (
Ruo‐Qi Li, Yong‐Qiang Chai, Lian Shi, Fu‐Gang Wang, Mi Liu   +4 more
wiley   +1 more source

Intelligent recognition of coal and gas outburst precursor and potential hazards using YOLOv8 neural network

Geomechanics and Geophysics for Geo-Energy and Geo-Resources
Fluctuations in gas emission or concentration at working face represent primary indicators of impending coal and gas outbursts, making them essential for monitoring processes.
Xiaofei Liu, Zinan Du, En-Yuan Wang, Ao Jiang, He Tian, Kaiyuan Wang, Yinghao Xiong, Heng Wang   +7 more
semanticscholar   +1 more source

Literature review and research progress of coal and gas outburst prediction indicators based on CiteSpace [PDF]

In order to investigate the development and prediction direction of coal and gas outburst prediction indicators, this study takes the scientific papers on coal and gas outburst prediction indicators in CNKI database from 1982 to 2024 as the research ...
Zhanyou SA, Kang ZHAO, Rong ZHANG, Shouqing LU, Jie LIU, Congmeng HAO, Yujin QIN, Yi LIU, Yongliang ZHANG   +8 more
core   +1 more source

Fractal Pore and Its Impact on Gas Adsorption Capacity of Outburst Coal: Geological Significance to Coalbed Gas Occurrence and Outburst [PDF]

, 2022
Pore structure and methane adsorption of coal reservoir are closely correlated to the coalbed gas occurrence and outburst. Full-scale pore structure and its fractal heterogeneity of coal samples were quantitatively characterized using low-pressure N2 gas
Zhenjiang You, Yu Song, Zheng, Sijian, You, Zhenjiang, Xinzhuo Zhao, Ye He, Zhao, Xinzhuo, Wang, Meng, Sijian Zheng, Feng, Guangjun, Song, Yu, Guangjun Feng, Meng Wang, He, Ye   +13 more
core   +1 more source

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, Xiaosheng CHUAI, Jianguo ZHANG, Guochuan ZHANG   +3 more
doaj   +1 more source

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, Erlei Su, Huanchun Liu, Xiangjun Chen, Lin Wang, Haidong Chen, Lin Li   +6 more
wiley   +1 more source