关键词: 主运输巷道, 二次挑顶, 带式输送机, 局部挑高, 立交布置

Abstract: At present, the coal transportation (main transportation) in underground laneways of coal mines in our country mostly adopts the transportation mode of belt conveyor, personnel, equipment, materials, gangue and other auxiliary transport using trackless rubber-tyred vehicles, traditional rail plus aerial vehicle, monorail crane, rail truck and other ways. The main and auxiliary transportation systems inevitably need to cross over, and the general treatment plan is to raise the main transportation roadway (belt roadway) as a whole to achieve a certain height of roadway cross-layout, but in the course of the connection of Kuanggou Coal Mining area, in the past, the construction of main and auxiliary haulage roadways in the first mining area has been completed at the same elevation without crossing, so it is very difficult to arrange the roadways crossing. When the author demonstrates the continuous mining area of Kuangou Coal Mine, the position of the track system in the underground car park needs to be extended from one side of the stone gate to the other side, two schemes are put forward, one is the track roadway around, the other is the belt roadway with local roof-lifting. In view of the proposed interchange scheme, firstly, the possibility of equipment transformation is calculated and analyzed, and it is determined that the belt conveyor can meet the transportation demand of roadway curve section after technical transformation Then, the support form and parameter optimization scheme of the cross-point roadway is put forward by using FLAC software, which ensures the safety and stability of the roadway surrounding rock. Through the detailed comparison of the construction period, investment and operation cost of the two schemes of the track lane bypass and the belt lane local lifting the roof, etc. , the scheme of belt laneway overhead crossing is simpler than that of track laneway around, the construction period is shorter, the investment is less, and the operation cost is lower, good technical and economic benefits have been obtained. The case of the Roadway interchange can be used as a reference for technicians in the similar layout of the existing roadway system.