Method for filling goaf with different materials alternately

Abstract

The invention provides a method for filling a goaf with different materials alternately. The advantages of paste filling and super high-water material filling are integrated, and purposes of reducingthe filling cost, improving the filling efficiency and achieving the level of more than one million tons per year are achieved on the basis of ensuring the ground filling effect to the maximum extent.According to the specific implementation scheme, the method for filling the goaf with different materials alternately in the invention comprises the following step: filling the same filling working face of the goaf with a plurality of filling bags, wherein the filling bags comprise a plurality of paste filling bags and a plurality of super high-water material filling bags.

Description

technical field [0001] The invention belongs to the technical field of mining, in particular to a method for alternately filling different materials in a goaf. Background technique [0002] Since the reform and opening up, my country's economy has grown rapidly, and the demand for coal has continued to increase. Especially since the late "Tenth Five-Year Plan", the coal industry has experienced a ten-year "golden period", which has strongly supported the rapid growth of the national economy. But long-term high-intensity coal mining has also brought a series of serious environmental problems. According to statistics, the average mining of 10,000 tons of raw coal in my country will cause land subsidence of 0.2hm 2 , the land area of ​​subsidence is about 50,000 to 60,000 hm per year 2 The decline of groundwater level and the destruction of water resources have resulted in the depletion of water resources in mining areas. The cumulative accumulation of gangue generated by coa...

AI Technical Summary

Problems solved by technology

[0015] In order to solve the problem that the single material used in the prior art cannot give full play to the advantages of different filling methods, the present invention proposes a method of alternate filling with different materials in the goaf, which integrates the advantages of paste filling and ultra-high water material filling. On the basis of ensuring the ground filling effect to the greatest extent, the filling cost can be reduced, the filling efficiency can be improved, and the annual output can reach the level of more than one million tons

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