Results 181 to 190 of about 1,889 (217)

Measurement and Analysis for Gas Emission Characters in Fully Mechanized Caving Face

Applied Mechanics and Materials, 2013
According to the practical condition of 3401 fully mechanized caving face in Dayang coal mine, the relationship between strata behaviors, mining technology and stope gas emission are analyzed through real-time monitoring of the support working resistance, advance abutment pressure and gas concentration of working face.
Xin Jian Li, Shou Song Guo, Jun He, Xiang Fan Mi   +3 more
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Technological optimization of fully mechanized caving mining face with large mining heights

Journal of Coal Science and Engineering (China), 2013
Fully mechanized cave mining with large mining height is a new mining method, due to its large mining thickness and lower roadway excavation, the technology has been widely used in China’s thick seam mining. In order to improve the top-coal recovery ratio of fully mechanized cave mining with large mining height, a study was conducted on optimizing the ...
Lu-Jia Fan, Sheng-Li Yang
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Characteristics of Gas Emission at Super-Length Fully-Mechanized Top Coal Caving Face

Journal of China University of Mining and Technology, 2007
Abstract Characteristics of gas emission at the K8206 working face in the Third mine of the Yangquan Coal Group were investigated. The effects of strata movement, advancing velocity of working face, production capacity of working face and gas extraction capability of strike high-level entry on gas emission at K8206 working face were analyzed.
Jia-lin XU, Bei-jian YU, Jin-fu LOU, Dong-ping WANG   +3 more
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Gas Control Technology of Fully Mechanized Caving Face of Hard Desorbing Coal Seam

Advanced Materials Research, 2013
Basing on the problems of residual coal in goaf in fully mechanized caving face in hard desorbing coal seam, high content of residual gas, large gas emission, serious gas overrun in return airflow corner and vitiated air, combing the actual situation in 3-219 fully mechanized caving face, the paper has adopted adjacent goaf drainage, drainage in gas ...
Gang Wang, Hai Yang Wang, Xin Hua Zhang
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Optimization Studies on Pillar Size of Fully Mechanized Caving Face

Advanced Materials Research, 2014
By theoretical calculations, numerical simulation and field monitoring methods to analyze the stress distribution and the extent of damage of coal pillar determine a reasonable size is about 10m, can improve the recovery rate of coal resources, and to ensure the roadway stability. 10m pillar coal resources compared with the previous 20m pillar recovery
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Study on Comprehensive Gas Control Technology of High-Gas Fully Mechanized Caving Face

Advanced Materials Research, 2012
In order to comprehensively control the gas of 1151(3) fully mechanized caving face in Xieqiao coalmine scientificly and efficiently, combining the actual situation of the face, gas drainage technologies such as roof drilling, drilling along seam, gas drainage in upper corner, roof drainage roadway had been applied and a comprehensive gas control ...
Weimin Cheng, Hai Yang Wang, Lu Lu Sun
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Finite Element Analysis of Abutment Pressure Distribution Characteristic of Working Faces in Fully Mechanized Sublevel Caving Face

Applied Mechanics and Materials, 2011
The elastic-plastic constitutive relationship and the Drucker-prager yielding criterion are used to simulate the behaviour of non-linear geo- materials. Dynamic change laws of abutment pressure of S2S2 work face of xiaokang coal mine is simuluted by the ansys program.
Hong Chun Xia, Zhen Qi Song, Li Jing Ru
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Numerical simulation on the delivery law of gob gas of fully mechanized caving face

Journal of Coal Science and Engineering (China), 2008
According to the cover rock caving features, the gob of fully mechanized caving face was divided into 3 zones: natural collected zone, pressure effecting zone and press stable zone. Based on these and the gob gas flow control equation, and considered the influence to the mining fissured zone of gas drainage, also made use of CFD software, we found an ...
Shu-gang Li, Wei Zhang, Hai-fei Lin
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Combined early warning method for rockburst in a Deep Island, fully mechanized caving face

Arabian Journal of Geosciences, 2016
Rockbursts annually cause hundreds of casualties and huge economic losses in China. The possibility of rockbursts occurring in a deep island, fully mechanized caving coal face is much higher than in a normal face. To predict and prevent rockbursts in this type of coal face, a comprehensive approach based on multi-instrument monitoring, including ...
Bangyou Jiang, Lianguo Wang, Yinlong Lu, Chunqiu Wang, Dan Ma   +4 more
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Notice of Retraction: Study on fully mechanized caving face end or foreside supporting system

2011 2nd International Conference on Artificial Intelligence, Management Science and Electronic Commerce (AIMSEC), 2011
The end of fully mechanized caving face is keystone and difficulty on protecting and managing the top. The effect on supporting the end of work face is very importment to mechanical and electrical machine, and very importment to workers' safety. The text analyze the problem of supporting the end at present, and Aiming at these problem, reach and ...
Peng-cheng Zhang, Guo-ying Meng, Ai-ming Wang, Wei Li   +3 more
openaire   +1 more source