Super high-water secondary filling bag and filling method

Abstract

The invention discloses a super high-water secondary filling bag and a filling method and belongs to the technical field of mine filing and mining. The secondary filling bag comprises a flexible bag body and a telescopic framework. The flexible bag body is rectangular when being propped up through the telescopic framework. A liquid injection hole is formed in the front side surface of the flexiblebag body and used for injecting filling liquid into the super high-water filling bag body. Exhaust holes are formed in the positions, close to the upper portion of the flexible bag body, of the rightside surface of the flexible bag body. A connecting groove is formed in the left side surface of the flexible bag body, and a connecting bulge is arranged on the right side surface of the flexible bag body. A secondary filling pipe penetrating through the front and rear side surfaces is further arranged on the flexible bag body. A filling inspection pipe penetrating through the front and rear side surfaces is further arranged in the position, close to the position above the front side surface, of the flexible bag body. A plurality of secondary filling bags are connected in series so as to block off an outlet of a worked-out section, the super high-water filling liquid is injected into the worked-out section from secondary filling pipes until the worked-out section is full, and secondary filling operation is completed. The super high-water secondary filling bag is practical in structure, convenient to operate and capable of being used for performing secondary filling on the worked-outsection and controlling earth surface subsidence.

Description

technical field [0001] The invention relates to the technical field of coal mine filling and mining, in particular to an ultra-high water secondary filling bag and a filling method. Background technique [0002] Ultra-high water material filling mining can effectively solve the problem of "three down" coal pressing, and has the characteristics of low filling cost, early solidification of filling material mixed liquid, high compressive strength of consolidated body, simple filling process and can greatly increase the filling rate, etc. It is an important part of coal mine green mining technology. Among them, bag filling is a filling method with wider applicability. In the field application process of bag filling, as the mining work progresses, the hydraulic support moves forward to protect the top beam from the ultra-high water bag filling body. There will often be a 50cm empty top area above the filling body, and the filling body cannot be intact. Protect the integrity of ...

AI Technical Summary

Problems solved by technology

In the field application process of bag filling, as the mining work progresses, the hydraulic support moves forward to protect the top beam from the ultra-high water bag filling body. There will often be a 50cm empty top area above the filling body, and the filling body cannot be intact. Protect the integrity of the roof

At the same time, the sinking movement of the roof further restricts the improvement of the filling rate

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