Mining room goaf filling method

Abstract

The invention relates to the technical field of mining engineering, in particular to a mining room goaf filling method. According to the mining room goaf filling method, a goaf which is 2-4 m above the top of a filling body is filled with mortar at the lime-sand ratio of 1:6, filling water is effectively prevented from being flush with the filling body and infiltrating into the filling body below,and the mortar plays a role of a water-resisting layer; and in addition, the final 2 m of the goaf is filled with tunneling gangue, and seams are filled with the mortar at the lime-sand ratio of 1:6.As the tunneling gangue is moderate in grain size and good in grading, consumption of cementing materials and water is greatly reduced, the water filtration effect is improved, the problem of volumedeformation of concrete is solved, and the strength, durability and anti-permeability of the concrete are improved; through a strengthening device and structure arrangement thereof on the top of the filling body, mortar filler is squeezed, and the drainage effect of the filling body is improved; and meanwhile, the mortar can quickly achieve the full seam filling effect, so that the strength of theconcrete is further improved, the bearing strength of the filling body is improved, and safety mining is realized.

Description

technical field [0001] The invention relates to the technical field of mining engineering, in particular to a method for filling goafs in mine houses. Background technique [0002] It is an important measure for the sustainable development of mines to deal with goafs by filling method. With the increasing proportion of filling mining method in my country's mines, especially tailings filling, the traditional mine filling design adopts full tailings non-cemented filling, and finally the top six meters of the filling body is filled with cemented filling. The material is cement, but because the aggregate in the cemented filling is full tailings, the particle size is small, and there is no coarse aggregate, resulting in high water content in the concrete, which is prone to cracks during the solidification process, low loudness, impermeability, wear resistance and The durability is poor, and it is difficult to meet the production requirements, and the dehydration of the filling slu...

AI Technical Summary

Problems solved by technology

With the increasing proportion of filling mining method in my country's mines, especially tailings filling, the traditional mine filling design adopts full tailings non-cemented filling, and finally the top six meters of the filling body is filled with cemented filling. The material is cement, but because the aggregate in the cemented filling is full tailings, the particle size is small, and there is no coarse aggregate, resulting in high water content in the concrete, which is prone to cracks during the solidification process, low loudness, impermeability, wear resistance and The durability is poor, it is difficult to meet the production requirements, and the dehydration of the filling slurry has always been a major problem that the tailings filling mining method has to face. The dehydration speed and effect directly affect the progress of mine mining and the underground environment.

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