Under-building, under-railway and under-water mining filling process
A process and goaf technology, which is applied to filling materials, mining equipment, earth cube drilling and mining, etc., can solve the problems of low recovery rate and inability to effectively fill the goaf, and achieve high recovery rate, reasonable use of gangue, and ecological protection. Harmony with society
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[0011] A "three-under" mining and filling process, including the following steps: (a) excavating a belt return airway 4 and a track air intake lane 7 on both sides parallel to the coal seam 9 to be mined; the belt return airway 4 The direction of the orbital air inlet lane 7 is parallel to the mining direction 6; (b) along the side of the belt return air lane 4 that is not adjacent to the coal seam 9 to be mined, excavate a gangue return air lane parallel to the belt return air lane 4 1. The coal seam between the gangue return airway 1 and the belt return airway 4 forms a coal wall; (c) the coal seam 9 to be mined is mined, and at the same time between the gangue return airway 1 and the belt return airway 4 The coal wall in the middle is perpendicular to the gangue return air tunnel 1 to cut out the connection Hengchuan 2 connected with the mined area 5 formed after the mining, and at the same time, the gangue is transported to the already excavated connection Hengchuan 2 throug...
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