Simulation of Coal Flow Movement Process in Coal and Gas Outburst of Roadway Network

doi:10.16182/j.issn1004731x.joss.201706025

Abstract

Abstract: In order to improve the simulation accuracy of the process in coal and gas outburst disaster period, time step method was put forward to describing the movement and accumulation of coal flow in roadway network when coal and gas outburst happened. Downward dip angles of tunnel were taken as the independent variables, model for distribution weight of coal output was built based on “Downward Priority” principle, and the model could adapt to downward roadway, nearly horizontal roadway and upward roadway. Strength change of outburst coal was established based on the collapse model. Combining with the coal and gas outburst accident and outburst monitoring facts in Jiulishan Coal Mine, process of coal flow movement was simulated, and the process was that coal flow swarmed into haulageway 16301, passing through reverse No. 2 ventilation door and much gas was desorbed and becoming part of the outburst gas source at the same time. Gas of high concentration was monitored by methane sensor when passing through No. 2 ventilation door under the influence of counter current wind pressure. The results show that the rapid rise of gas in roadway could be reasonably described, considering the simulation calculation of coal flow.

Key words: coal flow outburst, priority model, system simulation, time step method, roadway network

CLC Number:

Li Zongxiang, Wang Yadi, Zhang Chunhua, Wang Tianming. Simulation of Coal Flow Movement Process in Coal and Gas Outburst of Roadway Network[J]. Journal of System Simulation, 2017, 29(6): 1344-1350.

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