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Disaster causing mechanism and monitoring of dynamic and static load coupling of deep multi layer hard roof. [PDF]

Sci Rep
Fu X, Zeng L, Rong H, Zhang H, Liu T, Song J.   +5 more
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Numerical simulation on the delivery law of gob gas of fully mechanized caving face

Science in China Series A: Mathematics, 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
exaly   +2 more sources

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 ...
Hai Yang Wang, Xin Hua Zhang
exaly   +2 more sources

Development Law of Water-Conducting Fracture Zone in the Fully Mechanized Caving Face of Gob-Side Entry Driving: A Case Study

Minerals (Basel, Switzerland), 2022
This study is aimed at exploring the influence of narrow coal pillars in gob-side entry driving (GSED) on the development height of the water-conducting fracture zone (WCFZ) in the fully mechanized caving face.
Xiaoshuang Li, Yujiang Zhang, Weitao Yan
exaly   +2 more sources

Numerical simulation of hard top-coal's pulsed caving in fully mechanized caving face

2010 International Conference on Mechanic Automation and Control Engineering, 2010
In order to improve the top-coal recovery in fully mechanized longwall face, the hard top-coal caving was simulated through particle flow program in three dimensions. According to the pressing cracking test of hard coal, the top-coal's fragmentation size and spatial distribution were simulated.
Jinping Wei, Peimiao Sang, Zongcen Li, Guoxi Ding   +3 more
openaire   +1 more source

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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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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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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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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The dust emission kinetic scenario of top coal caving at the tail beam periodicity swing in the fully mechanized caving face

Chemical Engineering Research and Design
Xin-xiao Lu
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