Self-compaction filling paste body and preparation process thereof

Abstract

The invention discloses a self-compaction filling paste body and a preparation process thereof, relates to a filling material with self-compaction performance for coal mine cut and fill mining and a corresponding proportion stirring process, and belongs to the field of construction materials. The self-compaction filling paste body is characterized by being prepared by uniformly mixing coal gangue, coal ash, cements, high-efficiency water reducing agent and water according to proper proportion, wherein the slurry concentration of the paste body is 75-85 percent; and in terms of mass percentage, the proportion of the coal gangue to the coal ash to the cements to the water reducing agent to the water is 45-55 percent to 15-20 percent to 10-15 percent to 3-5 percent to 15-25 percent. The paste body is high in flowability, stability and filling performance, low in bleeding rate and uniform and consistent in quality, and fully fills every corner of a worked-out section; the bleeding and the segregation of the aggregates are avoided; the convenience in transportation and control is achieved; a pipeline is not blocked during transportation; and original mine wastes are adopted for the paste body for realizing the filling so as to protect the environment.

Description

technical field [0001] The invention relates to a self-compacting filling paste and a preparation process thereof, belonging to the field of building materials, and relates to a filling material with self-compacting performance and a technical proposal for a preparation process suitable for coal mine filling and mining. Background technique [0002] my country is a country with a large amount of coal resources, as well as a country with a large production and consumption of coal resources. Coal mining is the basis for the development and utilization of coal resources. At present, the "three-down" coal pressing in my country's coal mines is about 13.79 billion tons, of which 8.76 billion tons are under the buildings, accounting for about 63.5% of the total coal pressing. With the development of industrial and agricultural production, there is a tendency to increase coal pressure under buildings. In many mining areas, coal pressure under buildings accounts for 60% of the minea...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the self-compacting filling paste and its preparation process of the present invention is to solve the problems of blocked pipes and poor filling effect during the transportation process, thereby providing a self-compacting filling paste with high fluidity, low bleeding rate, stability and filling performance. Good, filling material with self-compacting performance and its preparation process suitable for coal mine filling mining