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Motion Pattern of Gas-Solid Two-Phanse Flow in Roadway after Coal and Gas Outburst

Author: ZhangYuMing
Tutor: TanYunLiang；SunDongLing；LiangYunPei
School: Shandong University of Science and Technology
Course: Solid Mechanics
Keywords: gas-solid two-phase flow pneumatic conveying numerical simulation motion law
CLC: TD713
Type: Master's thesis
Year: 2008
Downloads: 45
Quote: 0
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Abstract


The coal and gas outburst is an underground dynamical phenomenon with strong harm. The text had done series of researches on its motion law using theory analysis and numerical simulation method.(1)Based on the file data of national outbursts, characters of outbursts were analyzed and proper outburst model was given.(2)After theories of pneumatic conveying gas-solid two-phase flow were discussed, gas pneumatic conveying property was discussed.(3)Using Fluent, some numerical simulations were done, during which effect of outburst hole, motion law of coal and gas were included. Continuous phase used two dimension incompressible time-average N-S equation; turbulence model used standardκ-εmodel; algebra equation used separate solution method, coupling of pressure and velocity was SIMPLE algorithm and separate phase was Lagrangian partical track. Numerical simulation showed that, the hole of outburst usually lay on the lower part of roadway; the length of hole had less effect on the law; pressure fell evidently; velocity of gas was the highest at the center of roadway and decreased from the center to the sides; the coal jumped forwards.The staged research method of motion law could offer some references for aftertime work.

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CLC: > Industrial Technology > Mining Engineering > Mine safety and labor protection > Mine atmosphere > Coal (rock) and gas outburst prevention and treatment
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