Ground river water and soil conservation method influenced by coal mining

The invention belongs to the field of water conservancy facilities and construction, and particularly relates to a water and soil conservation method for a ground river influenced by coal mining, which comprises the following steps of: a, damming and draining before mining, b, laying pipes and arranging an adjustable bracket, c, separating water and draining water during mining and adjusting the adjustable bracket, and d, plugging ground surface cracks and backfilling and compacting a riverbed after mining. The adjustable support and the drainage pipe are recycled, and the river returns to normal. The system does not waste water resources, can normally supply water for agricultural and pastoral production, and is suitable for projects with small fall above and below rivers. The adjustable supporting leg designed by the invention can effectively adapt to the horizontal movement and sinking rule of the ground surface, so that the adjustable supporting leg can always generate a proper supporting effect on the dr