A method of filling and supporting beside gob-side entry retaining in thin coal seam

Abstract

The invention discloses a method for filling and supporting the side of gob-side roadway retaining in thin coal seams. It is to arrange a metal mesh box body at the design position of the filling wall for temporary support, and place the metal mesh box body towards the gob-side retaining method. There is a gap on one side of the alley, and a bleeding woven bag is hung on the inner wall of the metal mesh box; the gangue excavated from the bottom excavation area is thrown directly into the metal mesh box through the gap, and after filling to the top, grouting is carried out to fill the gangue gap; then the gap Fill it up with metal mesh and woven bags, and continue grouting into the gap to make the filling wall complete; the filling wall will be formed after bleeding and solidification; continue to cycle according to the above steps, and timely remove those that have solidified support. A section of the single pillar is moved to the next step for recycling until the end of the working face. The invention has simple construction technology, simple filling technology, low labor intensity and easy operation, can increase the loss of coal pillars in sections between coal mining working faces, and effectively alleviate the tension in mining relations.

Description

technical field [0001] The invention relates to a method for filling and supporting the side of an underground gob-side entry retention. Background technique [0002] Gob-side entry mining technology refers to the method of strengthening and controlling the surrounding rock of the original mining roadway during the mining process of the working face, so that it can not be damaged after the mining of the working face, and can meet the needs of the mining of the next working face. A mining technique. This technology has great advantages both technically and economically. [0003] Gobside retaining requires roadside support, and the roadside support methods have experienced traditional roadside support methods such as wooden stacks, dense pillars, gangue belts, and concrete blocks. Traditional roadside support methods have problems such as insufficient support force, mismatch of yielding pressure, large transportation volume, high labor intensity, and poor airtightness of gob...

AI Technical Summary

Problems solved by technology

The gangue excavated needs to be transported and discharged, which increases the workload and construction difficulty

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