A high-strength composite ice pack and its temporary filling method

Abstract

The invention discloses a high-strength composite ice bag and a temporary filling method. The ice bag is connected with a rapid freezer, and comprises a thermal insulation layer, a high-strength silk chemical fiber layer, a fiber reinforced plastic layer, a water injection hole and a drainage hole, wherein the thermal insulation layer is an outermost layer of the ice bag; the high-strength silk chemical fiber layer is a middle layer of the ice bag; the fiber reinforced plastic layer is an internal filler of the ice bag; the top end of the ice bag is provided with the water injection hole; the bottom end of the ice bag is provided with the drainage hole. The temporary filling method of the ice bag comprises the following steps: (1) arranging the ice bags on the rear side of a working face support according to a certain inter-row space; (2) filling the ice bags by using mine water; (3) starting the rapid freezer to rapidly freeze water in the ice bags; (4) supporting a gob roof by the frozen ice bags at a rational inter-row space to realize filling of a gob. The high-strength composite ice bag is low in manufacturing cost, the filling process is simple, the coal mining cost is reduced, and the overall labor efficiency is high.

Description

Technical field [0001] The invention relates to a filling technology of a mine goaf, in particular to a high-strength composite ice bag and a temporary filling method thereof. Background technique [0002] The mined-out coal seam needs to be filled in the goaf. Filling mining method is a common method for mine roof management and "three under one up" coal mining. According to the filling power, the filling mining method can be divided into manpower filling, wind filling and dry powder filling. , Hydraulic filling, etc. Among them, hydraulic filling is the most widely used. In hydraulic filling, water-sand filling without cementing agent was initially used, and cemented filling was developed later, and the concentration of the filling body was gradually increased, and it was gradually developed to a high-concentration paste-like filling and paste. Body filling. However, the existing filling technology has too many process links, complex processes, high equipment requirements, an...

AI Technical Summary

Problems solved by technology

However, the existing filling technology has too many process links, complex process, high equipment requirements, and a large amount of filling materials are consumed in production; the coal mining operation of the working face is affected during the filling operation; the overall labor efficiency is low, and the coal output per ton cost increase

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