Study on Reasonable Sealing Depth of Bedding Holes

In order to reduce the air leakage of bedding drill holes and to improve the concentration as well as the effect of gas extraction, test scheme and device design on gas axial migration law is designed through discussion and research, and the test is carried out in Mengjin Mine. Then, the reasonable sealing depth and the improved program of bedding hole is determined after the further analysis, which effectively reduces the air leakage of bedding hole.