A slurry pressure immersion filling process

Abstract

The invention provides a slurry pressure immersion filling process. Before filling the waste rock, a retaining wall is built at one end of the empty space, the waste rock enters from the other end of the empty space, and a plurality of grouting pipes are buried on the waste rock, and then Fill the waste rock on the grouting pipe, and pre-embed a layer of grouting pipe for every 1.5-2.5m thick waste rock filling; the waste rock filling and the pre-embedded grouting pipe are carried out synchronously and alternately; the slurry is pressurized by the filling pump, and after injection Press the grout pipe into the pre-filled waste rock filling body, and allow the slurry to evenly infiltrate and fill the pores of the entire waste rock filling body. Gradually grout from bottom to top, and stop injecting when the grout overflows the observation hole. Slurry; wait for the solidification of the slurry and the waste rock to be cemented into a whole, and the slurry pressure immersion filling can be completed. After the cementing material is prepared into slurry, use the delivery pump to inject the slurry into the pre-filled waste rock filling body in the goaf through the pre-buried grouting pipeline, and let the slurry evenly infiltrate and fill the entire waste rock filling body Pores can be cemented and filled after the slurry is solidified.

Description

Technical field[0001]The invention relates to a filling mining method, in particular to a cemented filling mining method for mining "three under" mineral resources.Background technique[0002]At present, the most researched cement filling technology in China is the paste pumping cement filling technology, that is, the aggregate of a certain particle size (generally less than 6mm) is mixed with the cement (cement), water, etc. in a certain proportion, and then pressurized by the filling pump. It is transported to the goaf for filling, but this filling method has disadvantages such as high filling cost and easy pipe blockage. At the same time, some enterprises are studying the cement filling of block stone. The current process route is mainly: block stone, cement, water, etc. are mixed in a certain proportion in the well with a loader and other equipment and then transported to the empty area for cement filling. The method has a lot of cement dust, long exposure time of dust in the well...

AI Technical Summary

Problems solved by technology

[0002] At present, the most researched cemented filling technology in China is the paste pumping cemented filling technology, that is, the aggregate with a certain particle size (generally less than 6mm) is mixed with the cement (cement) and water in a certain proportion, and is pressurized by the filling pump. Transported to the goaf for filling, but this filling method has defects such as high filling cost and easy pipe blockage

At the same time, some enterprises are also researching the cemented filling of block stones. The currently adopted process route is mainly: the cemented filling method in which the block stones, cement, water, etc. are mixed with a loader and other equipment underground in a certain proportion and then transported to the empty area for filling. There is a lot of cement dust in the method, the dust is exposed for a long time underground, and it is easy to cause occupational diseases, and the filling material needs to be transported many times, which is labor-intensive, high-cost, and low-efficiency.

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