Method for entry retaining for walling at sides of road in steel cylinder support mode
A pillar-type, steel-cylinder technology, applied in pillars/supports, earth-moving drilling, filling, etc., can solve problems such as restricting the application and development of gob-side entry retention technology, affecting the efficient production of working faces, and gas leakage in goaf areas. , to achieve the effect of strong operability and adaptability, saving materials and reducing labor intensity
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[0021] detailed description
[0022] Concrete can be poured into the barrel after the steel cylinder pillar 4 is placed. The concrete must be filled to contact the roof. The entire process from placing the steel cylinder pillar to pouring concrete must be completed within 5m behind the working face, that is, after the steel cylinder pillar is installed The distance s of the lagging working face is not more than 5m; with the continuous advancement of the working face, the next steel cylinder pillars 4 are laid out at a distance l in sequence, and concrete is poured until the concrete reaches the top. The spacing distance l between the steel cylinder pillars 4 is about 1.6m~2.0m,;
[0023] Finally, when the goaf has collapsed and is sufficient, pile up the gangue wall 6 with gangue or cinder between the steel cylinder pillars 4 at intervals, and spray the gangue wall 6 on the wall on the side of the roadway along the goaf. The grout can completely block the gangue gap, and the thic...
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