The invention relates to the technical field of slope protection
engineering, in particular to a drainage
system based on waste gully treatment filled with
coal gangue and a construction method. The
system comprises three parts: 1, a slope closure drainage structure; 2, an upstream
flood discharge and drainage pipeline; and 3, a
leachate collecting pipeline and a construction method thereof. According to the design, a method of combining zoned water drainage, water guide and water drainage is put forward, scouring of rainfall to the slope surface of the
washout ditch can be reduced to the maximum extent from the construction period to the operation period, meanwhile, combination with other supporting structures is facilitated, and safety of the slope surface of the
washout ditch is guaranteed. The problems of land resource occupation and
environmental destruction caused by
coal mining can be practically solved, the land space can be expanded, the
land utilization value is improved, the
ecological environment of a mining area is improved, and land space
greening treatment and agricultural cultivation
soil fertility improvement are achieved.