Determining the reasonable volume required to inject liquid CO2 into a single hole and displace CH4 within the coal seam in bedding boreholes: case study of SangShuPing coal mine

Investigation of the Suppression of Methane Explosions by N2/CO2 Mixtures in Different Proportions

“…In this study, methane with a stoichiometric concentration was used for explosion experiments, and thus, the concentration of methane was 9.5%. Six concentrations (10,12,14,16,18, and 20%) of N 2 , CO 2 , and N 2 /CO 2 were selected to evaluate the methane explosion intensity in the CH 4 −N 2 /CO 2 −air mixture. Five kinds of N 2 / CO 2 were selected for further tests to fully understand the effects of N 2 /CO 2 mixture proportions on inerting methane explosions.…”

“…This provides energy for industrial manufacturing, and methane can also be used in organic curing reactions with hydrogen (H 2 ) to realize hydrogen storage and transport under easily accessible temperatures and pressures. − However, methane is highly combustible such that the methane–oxygen mixture is readily ignited . During the transportation and use of methane, a certain concentration of methane will mix with air once a methane leakage occurs, leading to a methane explosion when encountering an open fire. − In the processing industry, the flammable gas and dust explosions have strong destructive power and present unpredictable risks in terms of equipment damage, environmental pollution, and casualties. − With the development of industrial technology, methane explosion accidents are inevitable and pose a huge threat to industrial safety, indicating the importance of preventing methane explosions. , Therefore, studies aiming to effectively prevent and control methane explosions are important.…”