The Research On Sealing Technology Of The Angle In Full Mechanized Coal Face With High Gas

This paper in view of the problems of the angles’ sealing technology in traditional u-shaped full mechanized coal face with high gas, and based on the engineering geological and mining conditions in Gubei coal mine of Huainan mining group, by laboratory test, field measurement and computer numerical simulation method, successfully designed and developed a lightweight flexible corner block airbags. By Flac3D to simulate The mine pressure appear law of corner place when the working face in mining influence, show that the Angle sealing airbags can adapt to corner place large deformation. Based on this, advances the individual hydraulic prop with a new type of Angle block Angle block airbag support method. Through Flunt simulated the change of gas concentration inside and outside of the upper corner wall when the angles using traditional method and the new individual hydraulic prop with new flexible corner block airbags seal and support method, it is concluded that the flexible light Angle block airbag use effect is very significant, can effectively prevent the gas overrun in upper corner. The successful application of the lightweight flexible corner block airbags, greatly reduce the labor intensity of workers; Reduced the traces of goaf coal waste and airbags can be reused many times, greatly saves the cost of the Angle block supporting. The results of the study on innovation of gas face Angle sealing technology, effectively prevent gas overrun in upper corner has great theoretical and realistic significance.