Underground goaf multi-point filling and goaf water filtering and draining method

The invention discloses an underground goaf multi-point filling and goaf water filtering and draining method, and relates to the technical field of underground goaf treatment. The underground goaf multi-point filling and goaf water filtering and draining method specifically comprises the following steps that S1, construction of a multi-point filling system is conducted, specifically, S11, a horizontal hole with the diameter being phi 165 mm is constructed into a goaf through a T150 drilling machine on the rock drilling horizontal transverse drift side, and S12, a filling pipeline and a drilled hole are connected through a connecting elbow. The underground goaf multi-point filling and goaf water filtering and draining method is convenient to operate, easy to construct, small in investment and large in return, the strength distribution of a filling body in a stope is more uniform, the safety of two-step stoping of a mine is improved, the flowing distance of filling slurry in a chamber is reduced, accumulated wa