Stripe gob filling repeated-mining method

Abstract

The invention discloses a tripe gob filling repeated-mining method. The method comprises the following steps. A, a fire dam of a main tunnel of the stripe gob is opened to ventilate and discharge possible remained noxious gas. B, the tunnel of the strip gob is cleaned and a cracked roof is fastened and the cracked trail appears in the locality and stagnant is got rid of. C, paste filling materials are adopted to fill a empty stripe of the stripe gob in order to form a filling stripe1. D, after the filling stripe is reinforced, remained striped coal pillar in the stripe gob is stopped. E, a new gangue which is formed by stopping and adopted by the new empty stripe processes with non-cemented filling in order to form a filling stripe2. The strip gob is filled with the filling materials through the adoption of the paste filling method and the remained stripe coal pillar is stopped and the new empty stripe which is formed by stopping is dealt with the non-cemented filling by adopting the gangue. The method has the advantages of not only improving further recovery percent of the coal resources, but also eradicating hidden trouble of geological disaster in mining area caused by the instability of the strip coal pillar.

Description

technical field [0001] The invention relates to a method for re-mining coal mine strip goafs, which is suitable for the re-mining of coal pillars in strip goafs formed by strip mining, and belongs to the field of coal mining methods. Background technique [0002] Using strip mining in thin and medium-thick coal seams under buildings is an effective mining method to ensure the safety of ground buildings and liberate coal resources under buildings. For decades, my country's coal mines have adopted the strip mining method to exploit coal resources under buildings, forming a large area of ​​strip goaf. At the same time, a large number of strip coal pillars are left as the support of the overlying rock underground, resulting in a waste of coal resources. At the same time, with the prolongation of time, the possibility of instability of these coal pillars is increasing. Once the coal pillar becomes unstable, it will cause geological disasters such as earthquakes in the mining are...

AI Technical Summary

Problems solved by technology

For decades, my country's coal mines have adopted the strip mining method to exploit coal resources under buildings, forming a large area of ​​strip goaf. At the same time, a large number of strip coal pillars are left as the support of the overlying rock underground, resulting in a waste of coal resources

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