Research on the law of gas distribution and leakage prevention and control based on the “source exchange” relationship

Aimed at the fissure development and mining pressure of shallow coal seams after mining and mining pressure. The theoretical analysis, numerical simulation, and on-site trial are used to study the laws and leakage prevention and control of the “multi-source exchange”. Based on a Shendong Coal Mine as the background theory, the cause of the leakage channel development is analyzed. Based on the SF₆ tracking gas leakage test technology, the “source exchange” relationship in the air leakage area is obtained. The distribution rules are given measures for leakage prevention and control. The results of the study show that the gas distribution of the vacuum area under the air leakage conditions will change greatly, and the degree of danger is related to the amount of air leakage. The use of blocking technology can be controlled.