Experimental study of the impact of gas adsorption on coal and gas outburst dynamic effects

2019 ◽  
Vol 128 ◽  
pp. 158-166 ◽  
Author(s):  
Jie Cao ◽  
Linchao Dai ◽  
Haitao Sun ◽  
Bo Wang ◽  
Bo Zhao ◽  
...  
Keyword(s):  
Experimental Study ◽  
Gas Adsorption ◽  
Coal And Gas Outburst ◽  
Dynamic Effects ◽  
Gas Outburst ◽  
The Impact

The Impact Analysis of Coal’s Elastic Energy on the Coal and Gas Outburst Shock Wave

2012 ◽  
Vol 616-618 ◽  
pp. 390-395
Author(s):  
Cheng Wu Li ◽  
Tian Bao Gao ◽  
Shan Yang Wei ◽  
Teng Li
Keyword(s):  
Shock Wave ◽  
Elastic Energy ◽  
Impact Analysis ◽  
Dynamic Theory ◽  
Coal And Gas Outburst ◽  
Calculation Formula ◽  
Theory Analysis ◽  
Gas Outburst ◽  
Quantitative Calculation ◽  
The Impact

According to the gas dynamic theory, this paper deduces the approximate calculation formula on elastic energy of a tons of coal through theory analysis, and then gets the quantitative calculation method between incident overpressure and reflected overpressure of the coal and gas outburst shock wave. The calculation formula in this paper is in line with the measured values, and so its validity has been verified. The analysis result shows that the effect of the elastic energy during the process of coal and gas outburst should be considered when the depth of the coal seam is great and the coal’s modulus of elasticity is small.

Experimental study of gas concentration and its thermal behavior in coal and gas outburst

2021 ◽  
Vol 14 (18) ◽  
Author(s):  
Jiang Xu ◽  
Liang Cheng ◽  
Bin Zhou ◽  
Shoujian Peng ◽  
Xiaobo Yang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Thermal Behavior ◽  
Coal And Gas Outburst ◽  
Gas Concentration ◽  
Gas Outburst

scholarly journals Research on the Force Characteristics and Structural Optimization of Mine Antioutburst Door under the Influence of Coal and Gas Outburst Impact Airflow

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Linchao Dai ◽  
Haitao Sun ◽  
Xusheng Zhao ◽  
Bo Wang ◽  
Jie Cao
Keyword(s):  
Simulation Experiment ◽  
Impact Load ◽  
Ventilation System ◽  
Coal Mines ◽  
Coal And Gas Outburst ◽  
Shock Loads ◽  
Research Results ◽  
Gas Outburst ◽  
Key Technologies ◽  
The Impact

In order to deeply explore the destructive effect of the impulsive airflow on the mine antioutburst door when coal and gas outbursts occur in underground coal mines, a large-scale coal and gas outburst dynamic effect simulation experiment device is used to carry out the coal and gas outburst disaster simulation experiment. The impact load and deformation characteristics of the antioutburst door under the impact airflow during coal and gas outburst are analyzed, and the experimental results are discussed in depth through numerical simulation analysis and field example analysis. Based on this, the internal and external causes of the damage of the antioutburst door on the coal mine site are analyzed, the key technologies that need to be solved in the design of the antioutburst door’s disaster resistance are studied, and the overall design of the structure optimization design of the antioutburst door is proposed. The research results show that after coal and gas outburst, the pressure on the antioutburst door will rise and fall, and the fluctuation will be greater. Under the same installation position, the farther the antioutburst door is from the protruding point, the less pressure it bears. In the middle and late stages of the outburst, intermittent negative pressure of the gas at the antioutburst door appeared. The key technologies for the design of the antioutburst door and its disaster resistance mainly include that strengthen theoretical and experimental research on the formation mechanism of outburst shock waves in mines, the interaction mechanism between disaster shock loads and dampers, and the magnitude of disaster expected shock loads; optimize the structure of the antioutburst door size, the width of the contact surface between the air door and the door wall, the stress distribution of the air door under impact load, the design of the safety hole, and the locking device; and improve the disaster monitoring and alarm capabilities of the antioutburst door and collect changes in antioutburst door pressure in real time. The research results provide a theoretical basis and technical support for the optimization of the antishock performance of underground antioutburst doors in coal mines and have important practical significance for improving the disaster resistance of the ventilation system.

Experimental study on the guiding effect of tectonic coal for coal and gas outburst

Fuel ◽  
2022 ◽  
Vol 309 ◽  
pp. 122087
Author(s):  
Qingyi Tu ◽  
Sheng Xue ◽  
Yuanping Cheng ◽  
Wei Zhang ◽  
Gaofeng Shi ◽  
...  
Keyword(s):  
Experimental Study ◽  
Coal And Gas Outburst ◽  
Gas Outburst ◽  
Tectonic Coal ◽  
Guiding Effect
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