SU836357A1 - Method of working thick sloping coal beds - Google Patents

Description

(54) METHOD FOR DEVELOPING POWERFUL RIGHT COAL STRAYS

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

There is a method of developing thick flat coal seams with sloping layers in a descending order, leaving interlayer packs (1).

However, this method is characterized by significant loss of coal.

There is a method of developing powerful steep coal seams, which includes working out the installation layer, erecting a flexible metal ceiling, carrying out preparatory workings and excavating the coal under the overlapping sublevels from the subsurface layers with breaking away from the soil of the seam in each of the advanced floors of the leading gap 2.

However, this method is characterized by a large load on the flexible metal overlap and considerable operational loss of coal.

The purpose of the invention is to reduce ruching to i-free metal overlap and to reduce operational losses.

The goal is achieved by removing coal under flexible metal overlap in oblique layers in a descending order with the storage of interlayer coal packs, and the last layer is removed from the subsurface shchrek from several sublevels at once by a diagonal face, the soil of which has an advance slot they wrinkle, leaving the safety pack in the compensation space equal to the volume of coal produced from one substage, after which they destroy the safety pack successively in each step detazhe in descending order, and produce zamaga zinirovanny coal compensating space underlying substage.

5: In FIG. 1 shows a diagram of the preparation and testing of a thick steep seam; FIG. 2 - section A-A of FIG. I; in fig. Figure 3 shows the pattern of formation of the compensation space in each substage of the lower layer.

The development of a powerful steep coal seam begins with the excavation of the installation layer and the construction of a flexible metal ceiling on its soil 1.

Under the protection of the flexible metal; 1ic overlap, subsequent inclined layers are worked out, each of which is prepared by the drifts 2 and 3 on the haul horizon and by the drifts 4 and 5 on the ventilation layer and worked off, leaving an interlayer of coal, which is gradually destroyed by rock pressure and magnetized under a flexible metal ceiling 1. A burst pack of coal 6 is then released when the last lower layer 7 is removed from the soil of the formation. - The lower layer is processed by a long diagonal face 8. In each bottom, there are three subsurface drifts J and a conveyor drift 10. The drifts are interconnected by ventilation holes 11. The long diagonal faces. under a flexible metal overlay, it is placed at an angle of 75 ° to the horizon. The advance slit 12 is taken out of the soil of the reservoir to the full height of the bottom, then it expands into the compensation space 13, leaving the safety block of coal 14. The volume of the compensation space is taken to be equal to the volume of coal discharged from a single substage .X The charmed coal is released by drilling and blasting protective charcoal 14 packs consistently in each substage in a descending order. At the same time, coal is released into the compensation space of the underlying substage. At the same time. but with the destruction of the safety package of coal 14, the leading gap P2 and the compensation space 13 are recreated. Then the work cycle is repeated.

This method will significantly reduce the operational loss of coal.

Claims (2)

Invention Formula The method of developing powerful steep coal seams, including mining the installation layer, erecting a flexible metal ceiling, carrying out preparatory workings and excavating the coal under the overlap of the sub-floors from the drifts with breaking away from the soil layer in each of the advanced substations of the leading gap, characterized in that reducing the load on the flexible metal overlap and reducing the operational loss, the thickness of the coal under the flexible overlap is taken out in downward order with the logging interlayer packs, and the last layer of the soil layer is removed from the sublevel drifts from several sub-floors at once by a diagonal face, the soil of which is ahead of the slot is expanded, leaving a safety pack in the compensation space equal to the output coal from one substage, then ruptured a safety package in succession in each substage in the descending order and release the charmed coal into the compensatory state of the underlying substage. Sources of information taken into account in the examination of 1 USSR Author's Certificate No. 503021. class. E 21 C 41/04, 1972. 2. USSR author's certificate No. 607981, cl. E 21 s 41/04, 1976 (prototype). Fig.Z