Research on translation layout of mining gateway in seam coal with closed distance to other seam

In order to keep the mining gateway in a low stress area, to maximally reduce the gateway deformation and to ensure the mining gateway to meet the requirements of the face ventilation, human walking, transportation and others during the gateway driving and the face mining period, the paper discussed the gateway failure causes, how to reduce the strata pressure of the gateway and how to optimize the mining gateway layout in the mining section. The paper provided the scientific layout for the mining gateway. The paper studied the internal displacement and overlapping layouts for the coal face, and analyzed the stressed status of the gateway and found the cause of the gateway failure. According to the surrounding rock control theory of the gateway, the paper provided the mining gateway layout for the new downward slicing seam. The paper found that the transportation gateway and the air returning gateway in the downward slicing seam should be horizontally displaced 10 to 20 m related to the gateways in the upward slicing seam. Due to the strata pressure of the gateway reduced, the coal production was improved and the production cost was reduced. the new layout of the gateway was favorable to the normal replacement of the gateway driving and face mining and provided the excellent conditions to build a high production and high efficient mine.