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

Abstract

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 water in the stope can be emptied in time, and the working efficiency is improved. Thick and fine particles of the slurry in the stope are uniformly distributed, and the phenomenon of non-uniform strength distribution of the filling body is reduced.

Description

technical field [0001] The invention relates to the technical field of underground mined-out area treatment, in particular to a multi-point filling method for underground mined-out area and a method for filtering and draining the mined-out area. Background technique [0002] When filling goafs in underground mines, most filling mines use filling roadways to arrange filling holes to fill the stope. However, goafs without filling roadways are often filled with single-point material distribution. The filling slurry flow process The phenomenon of segregation and stratification will occur in the process, and the main performance is that the particle size of the filling material increases first and then decreases along the flow direction of the slurry. [0003] The strength of the filling body is affected by delamination and segregation, and the distribution is uneven. When the length of the mine room is short, the segregation and delamination phenomenon is small, but the length o...

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a multi-point filling and goaf filtration and drainage method in the underground goaf, which solves the phenomenon that the strength of the filling body is unevenly distributed due to the influence of delamination and segregation. In a short period of time, the segregation and stratification phenomenon is small, but the length of the stope in the middle of the mine is generally more than 100m, and the stratification and segregation phenomenon is more serious when the single-point cloth filling method is used. The filling body far away from the point is easily affected by the blasting vibration, and thus collapses. The realization of multi-point filling without adding filling lanes has a positive effect on the safety of the second-step mining of the mine. Rock fissures are not well developed, and the precipitated water of stope filling slurry cannot be discharged in time, which will lead to the problem that the filling body strength is not up to standard when the slurry is first diluted by the upper layer of water during subsequent filling.

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