SU1402669A1 - Method of working a protective layer - Google Patents

Abstract

This invention relates to mining promet. The purpose of the invention is to prevent the formation of zones of increased rock pressure on the seam, the formations being sought during the hydrotreatment of a protective formation and an increase in the completeness of extraction and use of coal. A floor block is being prepared by an exit block. From the lower drift, drill a well (C) through the reservoir to the upper drift. The hydromonitor is lowered into C and the coal strips are washed out with the pillars and ceilings in between. After hydroprocessing of the block at its boundaries create refractory bridges. Then the pillars are weakened and the roof with the ceiling is collapsed. From the earth's surface into the collapsed space of the spent block, the drill bits are knocked down in pairs with the formation of a firing plate. Between the C vapor, coal remaining in the blockage is gasified, and combustion products are removed through C.

Description

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The invention relates to the mining industry and is intended for the advanced hydroprocessing of protective formations.

The aim of the invention is to prevent. Formation of zones of increased rock pressure on the protected seams during hydroprocessing of the protective seam and an increase in the completeness of extraction and use — coal.

The method is carried out as follows.

The sublevel drifts prepare an extraction block. From the lower drift, drill wells along the reservoir to the upper drift. A hydromonitor is lowered into the wells and coal bands are washed out, leaving a ceiling with a capacity of at least 0.8-1.0 m and pillars. After hydroprocessing, the block at its borders creates refractory bridges that protect the coal reserves in adjacent areas of the formation from the spreading of the combustion process and gasification products. Then, the pillars are weakened, for example, by their trimming and the roof with ceiling is removed. From the earth's surface into the collapsed space of the waste block, the wells are drilled;

they are pairwise, for example, by hydraulic fracturing, are formed by a fire face, between the pairs of wells hydrified coal remains in the blockage, and the combustion products are removed along the wells for further use.

Claims (1)

Invention Formula A method of developing a protective formation, including excavating the coal blocks and forming pillars within the boundaries of the excavation block, collapsing the roof, and leaving the coal pillars in the collapsed space, characterized in extraction and use of coal, between the pillars, the coal is left at the ceiling, fireproof lintels are created at the edges of the excavation block, and the roof is collapsed by demolishing pillars, then they drill from the earth's surface into the collapsed space, between the pairs of which they form a hot face and the remaining coal is burned, and the products of combustion are extracted through the wells.