Paste-like backfill technology used in coal cutting area

Abstract

The invention relates to a paste self-flow stuff technique of coal mine and relative paste, which uses the coal gangue as main stuff. The invention is characterized in that the stuff technique comprises that mixing cement and powder coal into water to form pulp; adding coal gangue to form coal gangue suspension paste; using tube to self-flow transmit the paste into under-well stuff area to stuff the mining field. The invention uses coal gangue as main stuff material and uses self-flow stuff technique, with low cost and the application in the underground coal layer, to reduce the pollution of coal gangue. The inventive paste has high water contant and low water leakage, therefore, the stuff has high strength.

Description

technical field [0001] The invention belongs to the technical field of filling the mining area in underground mineral mining, and in particular relates to a self-flowing paste-like filling process for coal mine stope mainly using coal gangue as aggregate, and the paste-like body used in the process. Background technique [0002] The filling and filling mining method has been widely used in non-ferrous metal and gold mines due to its dual functions of environmental protection and ore recovery while ensuring safety. As early as the 1950s, my country adopted the waste rock dry filling process for the purpose of waste disposal. In 1955, the application rate of this method in non-ferrous metal underground mining mines was as high as 54.8%. With the development of mining technology, due to its low efficiency, small production capacity and high labor intensity, waste rock dry filling can no longer meet the needs of strong mining, strong extraction and strong filling mining producti...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a coal mine stope-like paste self-flow filling process with low filling cost, simple filling process and pipeline transportation, which solves the defects of high cost, complicated process and low strength of filling body in the existing filling process

[0005] Another object of the present invention is to provide a paste-like body that can be used in the self-flowing filling process of the paste-like body in the coal mine stope. The raw material and production cost of the paste are low, the fluidity is strong, the water content is small, and the filling body formed has high strength. , which solves the defects of large cement consumption, high cost and easy blockage of the pipeline when the paste self-flows in the existing filling body

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