Physical simulation experimental studies on dynamic effects of gas in coal seam

摘要

Due to its complex material composition and occurrence condition of gas in coal, the adsorption, desorption, diffusion, seepage and outburst of gas in coal are complex, usually with some effects such as sounds, light, electric, heat, magnetic etc.. By now, studies on solid-steam coupling of gas-filled coal body are fare, especially on simulation experiment of dynamic effects of gas in coal seam. In this case, it is especially important to study solid-steam coupling seperating methods of gas-filled coal body.This study tries to use a new dynamic effect simulation system of gas in coal seam, simulating coal samples’ compacting, gas migrating, microstructure changing within different pressure, which will provide experimental basis to prevent gas disaster in coal mine and study explore technologies. The experimental equipment system is composed of sampling system, compacting system, gas-filling system and data-collecting system, which can represent the process of gas migration and outburst in coal seam, represent the process of stress concentrating and releasing, as well as some concomitant physical effection studies.