Results 11 to 20 of about 2,878 (183)
Proactive goaf inertisation for controlling longwall goaf heatings
Procedia Earth and Planetary Science, 2009 AbstractDeep oxygen ingress into the goaf can lead to spontaneous heatings particularly during face stoppage or slow face retreat in the panel. This requires the deployment of proactive goaf inertisation strategies based upon detailed understanding of goaf gas flow patterns and distribution characteristics.
Rao Balusu
exaly +3 more sources
Impact of goaf gas drainage from surface vertical boreholes on goaf explosive gas zones
International Journal of Coal GeologyGoaf gas drainage is extensively employed in Australian gassy underground coal mines to manage safety and productivity and to mitigate gas emissions. As mining operations reach greater depths and produce higher levels of gas emissions, narrower spacing between adjacent vertical goaf boreholes and higher suction pressure are increasingly being adopted ...
Joung Oh, Guangyao Si
exaly +6 more sources
Goaf Locating Based on InSAR and Probability Integration Method [PDF]
Remote Sensing, 2019 Mining goafs can cause many hazards, such as burst water, spontaneous combustion of coal seams, surface collapse, etc. In this paper, a feature-points-based method for the efficient location of mining goafs is proposed. Different interferometric synthetic aperture radar (DInSAR) is used to monitor the subsidence basin caused by mining.
Zheng Meinan, Yunjia Wang, Sen Du
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Goaf risk prediction based on IAOA–SVM and numerical simulation: A case study
Underground Space (China)In regard to goaf risk prediction, due to the low accuracy and single prediction method, this study proposes a method that combines the improved arithmetic optimization algorithm (IAOA) – support vector machines (SVM) with GoCAD–FLAC3D numerical ...
Shunchuan Wu, Kegang Li, Rui Yue
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Energies, 2022 Based on the ventilation characteristics of the gob-side entry retaining face, a mathematical model of spontaneous combustion in the gob-side entry retaining face is established.
Jianguo Zhang +5 more
doaj +1 more source
Pressure distribution characteristics of overlying strata in adjacent fully mechanized mining face
Meikuang Anquan, 2022 After the coal mining face is mined, the pressure transmitted by the surrounding rock in the goaf will experience a process from growth to stability, during this period, the growth rate and pressure distribution of overburden pressure in goaf have a ...
DAI Wenqi
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Hazards of Environmental Disruption in Mine Goafs and Stability Evaluation in Gaofeng Mining Area [PDF]
Nature Environment and Pollution Technology, 2020 China is rich in mineral resources with many points and broad faces in metal and nonmetal mines. However, numerous goafs are formed due to backward mining technology, low intensification degree, incomplete safety precautions, and the excessive ...
Chun Bai, Meng Xian Yun and Jun Mei Wang
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Gong-kuang zidonghua, 2021 It is difficult to fully reflect the distribution of O2 concentration field of coal spontaneous combustion in goaf by using theoretical analysis and experimental research methods to study the impact of high ground temperature on coal spontaneous ...
LIU Yikang1,2 +4 more
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Impacts of train-induced dynamic loads on goaf foundation of Qinshui coalfield
Frontiers in Earth Science, 2023 For the high-speed railway built in the goaf sites, if the influence depth of the additional loads reaches the collapse fault zone of the goaf foundation, the overburden rock mass above the mined area will move again, causing the surface to deform again,
Hui Wang +6 more
doaj +1 more source
Study on gas migration law in large area goaf under coal spontaneous combustion environment
Meikuang Anquan, 2022 The air leakage flow field in large area goaf is complex, and the air leakage law is not clear. Once coal spontaneous combustion occurs, it will threaten the safety of the mine.
ZHANG Pengyu +4 more
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