Backfilling U-shaped shed

Abstract

The invention discloses a backfilling U-shaped shed and belongs to the field of underground supporting. The backfilling U-shaped shed comprises a U-shaped shed, wherein a grouting hole is reserved at the shed leg position of the U-shaped shed, a grouting pipe is welded outside the grouting hole, and the internal diameter of the grouting pipe is identical to the diameter of the grouting hole. A cavity behind a wall is subjected to grouting filling through the reserved grouting pipe, line contact of the U-shaped shed and the surface of roadway surrounding rock is converted to surface contact, and accordingly the supporting area is enlarged for more than five times. The U-shaped shed can be stressed timely and uniformly, the supporting performance is increased by more than three times, and point damage of the U-shaped shed caused by somewhere non-uniform force bearing is avoided. The structural section of the U-shaped shed is enlarged, and the bending resistance and shearing rigidity of the U-shaped shed are obviously improved. The U-shaped shed integral supporting performance is maximized, and long-term stability of broken soft-rock roadways is ensured.

Description

technical field [0001] The invention relates to a U-shaped shed capable of being filled behind the wall, which belongs to the field of mine support. It is especially suitable for the surrounding rock support of mine roadways, and also suitable for other rock mass projects that need support. Background technique [0002] The support of broken soft rock roadway has always been one of the problems that plague the underground mining of coal mines. Due to the extremely loose and broken surrounding rock of the roadway, and the poor anchorability of anchor rods and anchor cables, it is difficult to effectively support the surrounding rock of the roadway. support, the safety of roadway support is greatly reduced. For this type of roadway, U-shaped shed support is often used in practice. However, due to the uneven surface of the roadway, it is difficult for the traditional U-shaped shed to stick to the rock surface, resulting in uneven stress on the U-shaped shed, and prone to poin...

AI Technical Summary

Problems solved by technology

However, because the T-shaped pipe is far away from the U-shaped shed, and the surface spray grout is easy to block the crack between the U-shaped shed and the surrounding rock surface of the roadway, the thick wall filling of the T-shaped pipe cannot fill the cavity behind the U-shaped shed. The overall support performance of the shed is still not fully developed

The support of U-shaped sheds is extremely labor-intensive, especially after the U-shaped sheds are crushed, the work of changing sheds and covering sheds is extremely cumbersome, and the construction speed is slow, which seriously affects the normal use of the roadway

Images