Journal of Coal Science and Engineering (China)
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Dynamic characteristics of the high-flow water three-way valve
Journal of Coal Science and Engineering (China) - Tập 19 - Trang 392-395 - 2013
Operating principle of water three-way valve with high flow for individual hydraulic prop in coal was presented in this paper, its strict and precise mathematical model was established, its flow field was simulated numerically by software Fluent, and its dynamic characteristics were analyzed during the work process such as raising leg, loading and overflow, the influence of the related parameters ...... hiện toàn bộ
Comparative experimental study on inhibiting gas explosion using ABC dry powder and diatomite powder
Journal of Coal Science and Engineering (China) - Tập 18 - Trang 138-142 - 2012
Using a 20 L spherical explosion suppressing test system, the largest gas explosion pressure and maximum pressure rising rate with additives of ultra-fine ABC dry powder and diatomite powder were tested and compared, and the explosion suppression effect of the two kinds of powder was analyzed. Experimental results show that both powders can suppress gas explosion and ABC dry powder is superior to ...... hiện toàn bộ
3D deformation effect and optimal excavated design of surface mine
Journal of Coal Science and Engineering (China) - Tập 15 - Trang 361-366 - 2009
The three-dimensional (3D) deformation effect of the slope engineering under the step-by-step excavation for the Antaibao surface mine was analyzed using the FLAC3D technique. An optimal excavated scheme with a relatively steeper slope angle of 47° instead of 30° was successfully implemented at the west wall in the geological section 73200 of the mine area, where the 3D effect of the nonlinear lar...... hiện toàn bộ
Numerical analysis of methane migration from floor strata to a longwall face
Journal of Coal Science and Engineering (China) - Tập 15 - Trang 113-119 - 2009
A two-dimensional numerical model of a large (1 000 m × 200 m) section of mine strata in the vicinity of seam 349 in longwall panel 802 in part B of the Murcki Colliery in the Upper Silesian Coal Basin, Poland, was built using the Universal Distinct Element Code UDEC. Longwall extraction of seam 349 with roof caving was simulated in the model over a length of 450 m. Mining-induced changes in displ...... hiện toàn bộ
Online fault recognition of electric power cable in coal mine based on the minimum risk neural network
Journal of Coal Science and Engineering (China) - - 2008
Experimental studies on resistance characteristics of high concentration red mud in pipeline transport
Journal of Coal Science and Engineering (China) - Tập 14 - Trang 157-161 - 2008
Red mud will flow in paste form under high pressure during pipeline transport. It belongs to a two-phase flow of materials with high viscosity and a high concentration of non-sedimentation, homogeneous solid-liquids. In pipeline transport, its resistance characteristics will be influenced by such factors as grain size, velocity, concentration, density, grain composition and pipe diameter etc.. Wit...... hiện toàn bộ
Experimental study on explosive mechanism of spontaneous combustion gangue dump
Journal of Coal Science and Engineering (China) - Tập 15 - Trang 394-398 - 2009
In order to explore the reason for the frequency explosion of spontaneous combustion coal gangue dump and get to know their explosion mechanism, established the experiment platform about spontaneous combustion coal gangue dump interoperable water. The gangue dump was heated using the external heat source, and rainy weather through water mist was simulated. Simulated experiment about explosion of s...... hiện toàn bộ
Research on theory and application of landslide model test
Journal of Coal Science and Engineering (China) - - 2010
A triaxial creep model for coal containing gas and its stability analysis
Journal of Coal Science and Engineering (China) - Tập 15 - Trang 248-251 - 2009
Triaxial creep tests on CCG specimens were systematically performed using a self-made creep seepage experimental apparatus for determining the creep law of CCG. An improved triaxial creep model of CCG was established on the basis of a Nishihara model and another visco-elasto-plastic model, parameters of which were fitted on test data. Furthermore, the creep model is validated according to the resu...... hiện toàn bộ
Geologically controlling factors on coal bed methane (CBM) productivity in Liulin
Journal of Coal Science and Engineering (China) - Tập 18 - Trang 362-367 - 2012
It is of great significance to forecast high yield of CBM wells and analyze dynamic production by having an overall study on the characteristics of the produced CBM and determining the main factors influencing the productivity of CBM. With the test report and the related geological parameters of a single well, methods of combining the productivity data and typical production curves were used to an...... hiện toàn bộ
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