The invention discloses a near-
slope mining method for a water-containing end slope of a strip mine. The near-
slope mining method comprises the following steps: step adjustment; a
combing area is determined, and temporary local unwatering wells are built; a profile steel
supporting wall is built; building a water-blocking
supporting wall; an auxiliary
supporting wall is built; and mining in sections and recovering the
water layer. According to the
cement rock (
coal) ash mixing
pile, applicability transformation is conducted on a traditional
cement soil mixing pile, the strength and impermeability of the
cement rock (
coal) ash mixing
pile made of the gravel, the
coal cinder and the coal ash are improved, meanwhile, adverse effects cannot be caused to the mining process, and meanwhile mine area waste can be consumed. Different mixing piles are arranged at different positions in a layered and classified mode, multiple functions of supporting, water prevention, supporting and water prevention and the like are achieved,
building construction is conducted in different positions independently, the
building construction process is simple, and a safe and stable slope environment and a dry construction environment are provided for
slope mining. According to the temporary local drainage well, the excavation depth of the drainage well is reduced, the cost is saved, and the underground water in the mining area cannot be seriously damaged due to the local
combing mode.