Emergency support for mine roof accident

First, the treatment of local small tops. Roof occurring small working face, take no solid roof, the roof slate has been temporarily stopped falling rock, which is easier to handle small local roof failure. In general, the beam dig the nest, the probe beam, or the use of one leg hanging metal shed roof beam treatment.

Second, the local topping range is larger. One is that the pseudo-tops fall straight and the direct items are not falling. Generally, the beam is processed from the ends of the top of the roof to the middle; the other is to directly fall and fall, and the falling area continuously smashes the meteorites along the gap of the coal wall. Generally, the method of hitting the wedge is adopted.

Third, the treatment of the big top. There are basically two methods for gently sloping thin coal seams and medium-thick coal seams, especially for medium-thick coal seams. The first method is to restore the working surface; the other is to open the cut or partially open the cut. Eye method.