SU949180A1 - Method for controlling main roof in working coal seams with long stoping faces - Google Patents

Description

(54) METHOD OF MANAGING PRIMARY ROOFING

IN THE DEVELOPMENT OF CARBON LAYERS

CLEANING PARTS

The invention relates to the mining industry and is intended to control the main roof during the development of coal seams with long refining holes.

A known method of controlling the roof fl.

However, this method is not effective enough.

There is a known method of controlling the main roof when developing coal seams with long clearing holes, which includes unloading roof rocks by weakening the coal mass in front of the clearing holes 2.

However, this method is also characterized by insufficient efficiency.

The aim of the invention is to increase the efficiency of roof management by smoothly lowering it and reducing the intensity of the evacuation.

The goal is achieved by the fact that the weakening of the coal mass is produced by vertical gaps, which are formed by drilling out of the refining slab perpendicular to the roof of the reservoir for its full thickness, the depth of the slit being equal to two times the thickness of

between the gaps is assumed to be equal to the thickness of the reservoir.

FIG. 1 shows a roof control circuit; in fig. 2 shows section A-A in FIG. one.

The method is carried out as follows.

With a one-sided excavation scheme, coal drilling of a vertical slit 1 in coal mass 2 is performed on the entire thickness of the seam with a special drilling rig 3,

10 which is located on the downhole conveyor 4 and is moved along it by means of a falling mechanism using a combine chain. The drilling is done after the conveyor is moved to the bottom during the excavation of each next strip of coal at a distance of 12-15 cm from the executive body of the combine 5. Initially, the holes were drilled with a diameter of 42 mm above the reservoir by 0.2 m. between the holes along the line perpendicular to the plane of the formation should

20 is 3-4 cm. After this, the holes are drilled with a crown with a diameter of 70-80 mm. Thus, in the marginal zone of the coal seam, vertical slots, perpendicular to the roof of the seam, are formed. With shuttle

Claims (1)

Claim A method of controlling the main roof during the development of coal seams with long working faces, including unloading the roof rocks by loosening the coal mass in front of the working face, characterized in that, in order to increase the efficiency of roof management due to its smooth lowering and reduce the rate of dumping, the mass of coal is weakened vertical slots, which are formed by drilling from the stope perpendicular roof reservoir ₁₀ for all its power, and the depth of the slot taking m seam thickness equal to two, and the distance between the slits is determined to be the power reservoir.