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Analysis on rock burst danger when fully-mechanized caving coal face passed fault with deep mining
Rock burst Microseism monitoring system Fault Numerical simulation
2012/3/27
When fully-mechanized caving face passed fault, rock burst accidence easily occurred. The SOS microseism monitoring system was applied to monitor the microseismic activities all time occurred in the c...
A CART technique to adjust production from longwall coal operations under ventilation constraints
Mining safety Coal mine methane Methane emissions Longwall mines CART analyses
2012/4/14
Methane emissions in longwall coal mines can arise from a variety of geologic and production factors, where ventilation and degasification are primary control measures to prevent excessive methane lev...
Safety line method for the prediction of deep coal-seam gas pressure and its application in coal mines
Gas pressure Measuring principle Prediction method Safety line Coal and gas outburst
2012/4/14
Gas pressure is an important index for evaluating the outburst risk and determining the gas content in coal seams. It is recommended to predict coal-seam gas pressure of the workface at deep levels be...
Real-time numerical simulations and experimental research for the propagation characteristics of shock waves and gas flow during coal and gas outburst
Coal and gas outburst Shock wave and gas flow Propagation characteristics Cross roadway
2012/3/31
When coal and gas outburst occurs, high-speed gas flow and air shock wave with high kinetic energy could be created. In this paper, the formation process of outburst shock waves and gas flow has been ...
Utility optimization strategy of safety management capability of coal mine – A case study of JCIA
Safety management capability of coal mine (SMCCM) Utility of coal miner Optimization strategy Employee satisfaction Safety knowledge
2012/3/28
This article describes optimization strategy of SMCCM from perspective of utility of coal miner with the method of empirical research. Four elements of SMCCM are put forward which consist of "employee...
Dynamic numerical simulation of coal mine fire for escape capsule installation
Coal mine fire Dynamic numerical simulation Escape capsule Personnel evacuation
2012/3/27
Fire in mine laneway leads to disordered ventilation system airflow, and smoke will result in staff poisoning.In such situation, it necessitates to install a rescue capsule in the common staff area. I...
Rapid regional outburst elimination technology in soft coal seam with soft roof and soft floor
Soft coal seam Regional outburst elimination Numerical simulation Gas drainage
2012/3/27
In order to solve the problems in outburst elimination of coal seams with outburst potential, methods of field testing, theoretical analysis and numerical simulation are employed in this study. It is ...
Study on difference of outburst elimination effect between sub-layers of soft coal and hard coal under the condition of gas per-drainage q
Soft coal Hard coal Drainage gas of coal seam Effect of outburst elimination Difference
2012/3/28
The effect of drainage and outburst elimination are obviously different between soft and hard coal sub-layers under per-drainage of coal seam, and hence, the location of per-drainage borehole related ...
Experimental research on inhibition performances of the sand-suspended colloid for coal spontaneous combustion
Sand-suspended colloid Temperature programmed Coal spontaneous combustion Inhibition performance
2012/3/31
Serious mine fire disasters have occurred in Northwest China where there are abundant coal resources.For the shortage of water and loess, a large cost of conventional grouting slurry is needed. Howeve...
Experimental research on displacing coal bed methane with supercritical CO2
Supercritical CO2 Displacement Methane Experimental research
2012/3/31
The high-gas and low-permeability are the common problems of China coal mine, which restrain the mining of coal-seam gas resources safely and efficiently. Hence, to solve the problem of low permeabili...
Spectrum characteristics analysis of microseismic signals transmitting between coal bedding
Coal rock Microseism signal Bedding Transmission Spectrum characteristic
2012/3/28
This study was performed to investigate the propagation law of microseismic signals transmitting along the direction parallel and vertical to the bedding in the process of coal rock rupture under unia...
Investigation into the nonlinear damage model of coal containing gas
Nonlinear Damage model Coal containing gas Outburst of coal and gas
2012/4/12
By taking the nonlinear deformation properties of coal into consideration, the nonlinear constitutive equation was founded. And in view of the compressible property of gas, the idea of compressive ene...
Theoretical equation of gas desorption of particle coal under the non-uniform pressure condition and its analytical solution
Particle coal The theoretical equation of gas desorption The non-uniform pressure condition Analytical solution
2012/3/31
Based on the second Fick’s law, the theoretical equation of gas desorption of particle coal under the nonuniform pressure condition was developed in this paper. The analytical solution of the theoreti...
Mechanism research on coal and gas outburst during vibration blasting
Coal and gas outburst Vibration Adsorption Fracture
2012/3/28
The coal and gas outburst results from plenty of factors, while vibration is the most important factor among them. Therefore, the influences of vibration acting on gas desorption and coal structure ha...
Relationship between EMR and dissipated energy of coal rock mass during cyclic loading process
Coal rock mass EMR energy Dissipated energy Hysteresis loop area Amplitude
2012/3/28
Dynamic collapses of deeply mined coal rocks are severe threats to miners. In order to predict the collapses more accurately using electromagnetic radiation (EMR), this paper researched the energy con...