SU737627A1 - Method of mining thick sloping coal beds - Google Patents

Description

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

There is a known method of developing thick layers of coal seams with layers along the strike using flexible overlapping and laying of the worked out space 1.

However, this method has a limited scope and cannot be used in a number of geological and geological conditions.

There is also known a method of developing powerful steep coal seams on floors with sub-floors, including carrying out ventilation and conveyor slots, sequential working out of sub-floors with insulated strips by blasting, storing and releasing coal on a conveyor drift 2.

However, this method is not sufficiently effective in the development of layers in certain geological conditions.

The aim of the invention is to increase the efficiency of development.

; The goal is achieved by isolating the strips from the lateral rocks before mining, and isolating each strip from the lateral rocks and from the coal mass to be mined is accomplished by creating gaps by drilling out a continuous series of wells and feeding hardening material into the gaps, and after isolating each strip of the well in the COAL array; Which c. later used as a compensation space for blasting, and the release of coal from the strip is carried out under the protection of

10 as far as the release of the ceiling, built on the ventilation flap.

FIG. 1 shows a strip mining scheme in the sub-floor; in fig. 2 is a diagram of preparing the strip for excavation.

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Claims (2)

The method is as follows. The coal seam is processed by floors divided into subsurface 1 with preparation of subslots by ventilation 2 and conveyor 3 drifts. Within the limits of the substage, the layer is taken out with sections of 4, having the form of bands. Each strip is isolated from the side of the subsurface array to be developed and from the side rocks by drilling out a flat row of wells with the formation of cutting gaps and filling the gaps with hardening material 5. For the purpose of directional drilling of wells this operation is carried out with the help of conductors. In case of need, reinforcing rods can be placed in the hardening material. After isolating the strip in the massif of the latter, wells 6 are drilled, which are subsequently used as a compensation space for blasting coal in the strip. The wells 7 are drilled in an array of coal vents for ventilation. After blasting an array of coal in the strip, it is released onto the conveyor pinch with the help of a vibration device 8 under the protection of the floor, as it is released, overlapping 9, which was previously constructed on the vent plate. This SPOSO0 will improve the efficiency of the development of powerful steep coal seams. , L Invention 1. A method of developing powerful steep coal seams on floors with sub-floors, including conducting ventilation and conveyor slots, sequentially working out the sub-floors with strips insulated from each other by blasting, storing and releasing coal to a conveyor shield, characterized in that to increase mining efficiency, the strips are isolated from the lateral rocks before mining, and each strip is isolated from the lateral rocks and coal from the coal to be mined. the formation of cracks by drilling out a continuous row of wells and feeding hardening material into the slots, and after isolating in the coal mass of each strip, bore holes that are later used as a compensation space for blasting, and the coal is released from the strip under protection of the overlap of flooring that is lowering as it is erected; it is built on the ventilation flap. .2. A method according to Claim 1, characterized in that reinforcing rods are placed in the hardening material. Sources of information taken into account during the examination 1. USSR author's certificate No. 201282, cl. E 21 C 41/04, 1965. 2. Development of steeply dipping seams of Kuzbass. M., 1956, p. 46 (prototype).