SU768983A1 - Method of working steep coal seams - Google Patents

Description

 one

The invention relates to the mining industry and can be used in the development of steep coal seams.

There is a method of developing steep coal seams, which includes testing 5 layers in sub-floors with coal breaking in sub-floors of sloping orts and sublevel drifts by taps under the collar; and overlapping;

There is also a known method of developing steep coal seams, including the carrying out of sublevel drifts, drilling explosive wells in the sub-stage within the exploding block, charging wells with explosives, blasting charges at the gas store coal and releasing coal to the sublevel drift 2

However, both of these methods are characterized by the dilution of coal and the inadequate safety of the clean-up operations.

The aim of the present invention is to reduce coal dilution and increase the safety of cleaning operations.

The goal is achieved by the fact that the bottom of the substage is tilted in the direction of cleaning operations and within each block before the charge charges are detonated, the degassing-compensation wells 30

and the release of coal is carried out in successive layers from the goaf to the bottom, and the goaf is separated from the bottom hole.

FIG. Figure 1 shows a mining scheme in the formation plane; in fig. 2 - section A-A of FIG. one.

The method is as follows. Refining of a steep coal seam is carried out by sublevels 1 with sublevel drifts 2 in a downward order. Before working out the sub-floors on the upper horizon of the floor, flexible overlap 3 is attached to which stabilizers 4 are attached, located on the side of collapsed rocks 5. The substation of coal in the sub-floor is performed by blocks 6 and the slab of the substage is slaughtered in the slab of the substage towards cleaning works. The slope is taken to be equal to the angle of the coal flow zone formed when released under the overburden. In each block, decontamination and compensation wells are drilled 7, then wells 8 are drilled to accommodate explosive charges. The blocking of coal in the block will be driven to the compensation wells and the gasified coal 9. The release of the carbonized coal is effected under its own weight through the windows of the mechanized support in 10 inclined layers from the worked-out area to the face. When lowering the flexible overlap, the stabilizers 4, with their lateral elements, come into contact with the soil and the roof of the reservoir, preventing ascent; and coal of the rock. The coal is transported along a sublevel drift by a conveyor 11.

This method will improve the safety of cleaning works and reduce the dilution of coal.

Claims (2)

1. USSR author's certificate number 112707, cl. E 21S 41/04, 1953. 2. USSR author's certificate number 491788, cl. E 21S 41/04, 1974.