13 and 14 ; Table 4 are as follows: Under the condition of the same pressure difference in gas migration between the inlet and outlet of REV, the gas migration pressure shows a decreasing trend during the migration process along the pores and fissures connected channel, that is, the red color at the inlet gradually evolves towards the blue color at the outlet.
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Study on the pore structure evolution and microscopic seepage characteristics of coal under high pressure air blasting.
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