Study on support technology of gateway with contiguous seams mining

In order to solve the support technical difficulties of the gateways in No. 29102 coal mining face for contiguous seams of Xishan Yachen Coal Industry C ompany, in references the gateway serious deformation, roof beam bending of the H steel support, the internal forward displacement of the support leg and others occur red after the H steel support made in the two gateways of the neighboring No. 29101 coal mining face, the paper systematically analyzed the surrounding rock displace ment and deformation and the support structure loading condition of the railway gateway in No.29101 coal mining face and had a study on the stability lost causes of th e gateway. A numerical simulation method was applied to determine the surrounding rock contral technical plan of the No.29102 track gateway and a site industrial trial was conducted. The results showed that a combined support technology with the high strength stabilized new bolt/steel mush ( anchor) and shield was applied to the N o. 29102 track gateway. When the driving of the gateway was passed over the measuring station about 110 m, the roof and floor convergence of the gateway was 17 m m, the convergence of two sidewalls was 19 mm and the support effect of the gateway was excellent and could provide the technical references to the surrounding rock control of the gateway under the similar condition.