Results 141 to 150 of about 2,878 (183)

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

The Application of TEM on Detecting Mine Goaf

Advanced Materials Research, 2014
Transient electromagnetic method is one of the geophysical prospecting methods to detect mine goaf. The paper analyzes the unique electrical characteristics of the stratum containing goaf. TEM inverts the apparent resistivity and delineates the mine goaf and determines water content by observing the pure secondary field.
Yong Jun Li, Xiao Ming Li, Ting Chen
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

Numerical simulation of scattering wave imaging in a goaf

Mining Science and Technology (China), 2011
Abstract Goafs are threats to safe mining. Their imaging effects or those of other complex geological bodies are often poor in conventional reflected wave images. Hence, accurate detection of goafs has become an important problem, to be solved with a sense of urgency.
Li Juanjuan, Pan Dongming, Liao Taiping, Hu Mingshun, Wang Linlin   +4 more
openaire   +1 more source

Goaf inertisation

The current demand for better goaf inertisation practices has increased research and attention towards developing an optimum inertisation method. A successful goaf inertisation technique is defined as one which provides the following benefits: reduce the time taken to inert a goaf to less than a couple of days, be cost effective without compromising ...
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Goaf Management, Methods of

2022
Zhou Keping, Xu Kuangdi
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Justification of goaf parameters in an underground gasifier

Collection of Research Papers of the National Mining University
Purpose. To establish relationships governing the formation and spatio-temporal evolution of the gasification goaf area in an underground gasifier as a function of gasification duration and coal seam thickness. The research methodology was based on laboratory-scale physical modeling of underground coal gasification, reproducing the advance of the ...
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Goaf gas drainage and its impact on coal oxidation behaviour: A conceptual model

International Journal of Coal Geology, 2021
Guangyao Si
exaly