Physical Sciences and Mathematics Commons^™

Study On P-Wave Velocity And Mechanical Response Characteristic Of Rock In Coal Seam Roof With Supercritical Co2 Injection, Chen Chen, He Xingyi, Niu Qinghe, Yu Hongxu, Xie Xiangyu

Coal Geology & Exploration

Deep coal seam CO₂ geological sequestration and enhanced CH₄ recovery(CO₂-ECBM) can both increase CBM recovery and achieve carbon emission reduction, possessing dual benefits of energy and environment. The geochemical reactions between supercritical CO₂(ScCO₂), water and coal seam roof can change its physical-mechanical properties and increase the risk of CO₂ leakage. In this paper, taking the roof rock of No.3 coal seam in Hudi Mine from Qinshui Basin as the research area, the ScCO₂-water-rock geochemical reaction simulation experiment was carried out to explore the geochemical reaction process of ScCO_{2 …}