Results 141 to 150 of about 531 (168)
Some of the next articles are maybe not open access.
The Basic Problems about Fully-Mechanized Top-Coal Caving System
Applied Mechanics and Materials, 2012The fully mechanized top-coal caving System is a large scale complex system. The conception of system and its basic problems, such as structure, function, inner-outer environment, boundary, parameter and so on, are defined in this paper. Through the thorough research, the basic theory of fully mechanized top-coal caving will be consummated, the ...
Xin Jia Leng +3 more
openaire +1 more source
Study on Failure of Soft Overburden of Fully Mechanized Top Coal Caving
Advanced Materials Research, 2012The similar material model experiment takes the NO.S2S9 coal face in DaPing coal mine as a prototype to research the characteristics of movement and failure of the soft overburden under fully mechanized top coal caving conditions. The abutment pressure distribution and periodic weighting, caving span are given by monitoring the stress and strain in the
Jin Shan Wang, Zhong Chang Wang
openaire +1 more source
Study on Improvement of Simulation Model of Fully Mechanized Top-Coal Caving
Applied Mechanics and Materials, 2011Based on the traditional David Jolley nine body stochastic simulation model, this article has designed a number of simulation programs of different drawing interval and refuse content. Research indicates that of top coal drawing body in this model upper width compared to lower width is small 1.3 ~ 1.7m, with the top coal drawing rate 50~71%.
openaire +1 more source
Control effect of fracture on hard coal cracking in a fully mechanized longwall top coal caving face
Journal of Coal Science and Engineering (China), 2009Through theoretical analysis, simulation test and practice, the law of a fracture’s influence on hard top coal press cracking was studied. The study focused on the relation between fracture and coal strength, top coal caving ability and work face layout.
Jin-ping Wei +3 more
openaire +1 more source
Applied Mechanics and Materials, 2012
In the coal mine of Huaibei Mining Area, based on the character of thick dirt band in the coal seams and the influences to top coal caving, the physical and mechanical properties of dirt band were analyzed. In order to improve the recovery rate of top coal, the failure mechanism of dirt band was analyzed through the cantilever beam model, and the ...
Jie Shen +4 more
openaire +1 more source
In the coal mine of Huaibei Mining Area, based on the character of thick dirt band in the coal seams and the influences to top coal caving, the physical and mechanical properties of dirt band were analyzed. In order to improve the recovery rate of top coal, the failure mechanism of dirt band was analyzed through the cantilever beam model, and the ...
Jie Shen +4 more
openaire +1 more source
Characters Evaluation of Ground Pressure in Fully Mechanized Top Coal Caving Face in Soft Coal Seams
Advanced Materials Research, 2011Based on the big thickness, low stiffiness and other characters of No. 8 coal seam in Huaibei mining area, the moving laws of top coal seam and roof, and distribution law of ground pressure were studied under the fully mechanized top coal caving.
Wei Dong Pan, Xiao Hua Wu, Yang Li
openaire +1 more source
Rational cutting height for large cutting height fully mechanized top-coal caving
Mining Science and Technology (China), 2011Abstract Large cutting height fully mechanized top-coal caving is a new mining method that improves recovery ratio and single-pass production. It also allows safe and efficient mining. A rational cutting height is one key parameter of this technique. Numerical simulation and a granular-media model experiment were used to analyze the effect of cutting
Bingxiang Huang +4 more
openaire +1 more source
Journal of Coal Science and Engineering (China), 2008
Under the action of abutment pressure in front of fully mechanized coal face with sublevel caving (CFSC), top-coal over CFSC deformed. In the process of whole deformation of top-coal, it changed from continuum elastic mass to non-continuum plastic mass contained fissures, become a loose body.
openaire +1 more source
Under the action of abutment pressure in front of fully mechanized coal face with sublevel caving (CFSC), top-coal over CFSC deformed. In the process of whole deformation of top-coal, it changed from continuum elastic mass to non-continuum plastic mass contained fissures, become a loose body.
openaire +1 more source
Characteristics of Gas Emission at Super-Length Fully-Mechanized Top Coal Caving Face
Journal of China University of Mining and Technology, 2007Abstract 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 +3 more
openaire +1 more source
2011 International Conference on Multimedia Technology, 2011
Microseismic monitoring technology was used on fully mechanized coal caving face of extra-thick coal seams in Tashan coal mine to study the movement law of the surrounding rock mass in order to provide a scientific basis for the coal mining design and the mining pressure control.
null Qingguo Huang, null Feng Gao
openaire +1 more source
Microseismic monitoring technology was used on fully mechanized coal caving face of extra-thick coal seams in Tashan coal mine to study the movement law of the surrounding rock mass in order to provide a scientific basis for the coal mining design and the mining pressure control.
null Qingguo Huang, null Feng Gao
openaire +1 more source