Results 181 to 190 of about 7,653 (230)

Fundamental understanding of goaf gas displacement in longwall goaf

2015
Fundamental understanding of the goaf gas distribution in a gassy coal mine is necessary for developing effective goaf gas drainage strategies in the longwall coal mine. The goaf gas was subjected to the surface and body forces that were classified depending upon whether they acted on the surface area or the volume of the gas element.
Tanguturi, K., Balusu, R.
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Application of TEM in Goaf Exploration

Applied Mechanics and Materials, 2012
The basic principle of transient electromagnetic method (TEM) is introduced in this paper, and it was used to explore position of the goaf which existed under Fushun east open-pit mining slope systematically. Inversion based on results of the exploration determines the location of dangerous abnormal area, provides a theory support for next exploration ...
Shao Jie Feng, Shi Guo Sun, Wen Bo Liu
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3D model reconstruction of underground goaf

SPIE Proceedings, 2005
Constructing 3D model of underground goaf, we can control the process of mining better and arrange mining work reasonably. However, the shape of goaf and the laneway among goafs are very irregular, which produce great difficulties in data-acquiring and 3D model reconstruction.
Yuanmin Fang, Xiaoqing Zuo, Baoxuan Jin
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Simulation on Spontaneous Combustion in Mining Goaf

2010 Asia-Pacific Power and Energy Engineering Conference, 2010
Through dimensionless analysis on effect factors of spontaneous combustion in goaf, this paper establishes a coupling mathematical model including skeleton temperature field, air temperature field, velocity field and oxygen concentration field to reveal the characteristics of spontaneous combustion.
Yuehong Wang, Yueping Qin, Yuanwei Ding, Chuan Qin   +3 more
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Evaluation of Grouting Effect Detection in Goaf

Applied Mechanics and Materials, 2013
The paper mainly introduces the problem of grouting reinforcement of buildings over the old goaf, and presents to the positioning of grouting reinforcement technology in the goaf. Combined with engineering example, the paper discusses the grouting filling method to strengthening governance goaf.
Hui Ren Bai, Jing Jing Li
openaire   +1 more source

CFD modelling of longwall goaf gas flow to improve gas capture and prevent goaf self-heating

Journal of Coal Science and Engineering (China), 2009
CFD models have been developed to investigate the longwall goaf gas flow patterns under different mining and geological control conditions. The longwall goaf was treated as porous regions and gas flow was modelled as a momentum sink added to the momentum equation.
openaire   +2 more sources

Goaf Surface Stability Analysis Using EMD Method

2010 Third International Conference on Information and Computing, 2010
Surface deformation of goaf is a complex non-linear process, which has a hidden, complexity, and long-term features. Before building the life or service facilities in the goaf, we must have evaluated the stability and residual. In this paper, a new idea was put forward for stability analysis and evaluation of goaf by multi-scale decomposition using EMD(
Zhang An-bing, Liu Xin-xia, Liu Hui
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Longwall horizontal gas drainage through goaf pressure control

International Journal of Coal Geology, 2015
Abstract Gas drainage in Australian longwall mining is increasingly challenging because of complex gassy conditions, multi-seam environments beneath previously extracted goafs, and environments where drilling a large number of conventional surface vertical gas drainage boreholes is not practical.
Hua Guo, Clint Todhunter, Qingdong Qu, Zongyi Qin   +3 more
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The Treatment Technology of Banbidian Goaf in Qinhuangdao

Applied Mechanics and Materials, 2014
The issues induced by underground mining are worldwide difficulties because the mined-out area is undesirable due to its implicity, complexity and large deformation. This paper describes the harmfulness of golf in highway construction based on the general failure characteristics of overlying rock masses.
Huan Sheng Mu, Ling Gao
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Goaf Treatment for Gold Mine under Expressway

Applied Mechanics and Materials, 2012
Based on investigation and survey, the conformation and the distribution for underground goaf are gotten. The goaf can be completely filled by drilling holes and grouting with the mixture of sand and water, using masonry border to isolate and filtrate the filled space and unfilled space.
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