SU1467185A1 - Apparatus for hydromechanical excavation of steep coal beds - Google Patents

Abstract

The invention relates to the mining industry. The purpose of the invention is to increase the efficiency of excavation by reducing the energy intensity of coal destruction and the cost of carrying out workings, as well as the separation of non-transportable rock fractions and their

Description

one

The invention relates to the mining industry and is intended for the hydromechanical excavation of large coal seams by falling strips.

The aim of the invention is to increase the efficiency of excavation by reducing the energy intensity of coal destruction and the cost of producing and separating the non-transportable fractions of the rock mass and removing them from the bottom hole area.

FIG. 1 shows a schematic of the device when conducting a threaded development; figure 2, - section aa in figure 1; on fig.Z - section bb in figure 2; figure 4 - section bb In figure 2; figure 5 - section GG in figure 2.

The device (hydromechanical angle of the excavation shield or shield slab) consists of submerged walls 1 connected to each other, which at the base are equipped with hydraulic cutters 2 with jet-forming nozzles. The base is made with a central deflection B side of the bottom. Between the submerged walls 1 is installed an intermediate wall 3, on which coal-fired ones are installed. blade-shaped drilling bodies 4c feeders-5. On the submerged walls 1 obliquely, a pyramid-shaped arrangement is installed, the top of which is fixed to the nozzle 7, through which the podshchetovy space 8 is connected to the transport line 9, which can be filled, for example, in the form of a pipeline located in the developed space. The pipe 7 with its tail part 10 with the transport line 9 is telescopically connected. Above the fence 6 is installed elastic protective lining 11, which can be made, for example, in the form of air bellows mounted around the transport line 9. and overlapping additionally above the fence 6 of the bottomhole space 12 from the developed space (from the working). On the fence 6 on the outer side of the overlap, installed transport vessels 13, which are connected to the windows 14, made in the pipe.7. Windows 14 serve to separate the non-transportable fractions from the broken rock mass, and vessels 13 to transport them from the bottom. High-pressure hoses (not shown) are brought to the hydraulic cutters 2 of the submersible walls 1 and to the coal-lifting drilling bodies 4 for supplying the working fluid to them.

The device works as follows.

The shield overlaps the bottom-hole part of the formation and below it, in front of the bottom, by hydro drilling, form the boiler cavities 15. At the same time, the shield overlap itself remains stationary. The working fluid is supplied through feeders 5 to the drilling organs 4. The latter are advanced from under the panel overlap and drill into the cavity of the cavity 15. The drilling canals are drilled when the cavities are drilled into the sub-space 8 formed by the barrier 6 and then through the pipe 7 and transport line 9 to the place of the coal

After the formation of the boiler cavities 15 to the depth of the drilling bodies 4, the drilling is stopped, and the main supply of working fluid is switched to the hydraulic cutters 2, which under the bases of the submersible walls .1 cut the slots 16 along the production contour. As the gaps 16 are cut, the shield overlap due to the spontaneous immersion of the walls 1 in them is lowered onto the bottom. When the shield is lowered, overlapping formed gap pillars 17 are destroyed in the shield space. With fencing 6 Destroyed coal from the pillars under its own weight falls into the boiler cavities 15, where it is mixed by the blades of the working bodies 4 with water, which is fed into the cavities through the organs 4. At the same time their idle rotation is carried out, due to which a hydro-gas-coal mixture is formed in the cavities, quoting the pressure of the upward flow of the supplied water through pipe 7 and line 9 from beneath. shield overlap transported to the place of release. After the shield is submerged to the depth of the boiler cavity 15, the drilling bodies 4 are again put into operation, and the cycle is repeated.

When the formation is excavated, the bottomhole space above the enclosure is pre-blocked with a barrier support 11 and sealed. After each cycle, the excavation line 9 is lowered down next to the shield plate. The amount of entry in one cycle of excavation by the shield is determined by the progress of the drilling bodies 4 from under the panel overlap, respectively, it is chosen the length of those

A horizontal connection of the shank 10 of the nozzle 7 with the transport line 9. On the supporting immersion wall 3, additional cutters 18 are installed, with which in the corner of the coal additional slots 19 are cut, connecting the boiler cavities 15 between themselves and with the contour slots 16. Additional slots 19 allow

formed during the cutting of the contour slots 16, the drill flux is directed to the boiler cavities 1 5 to form a hydro-angular mixture. The additional dismemberment of the entire pillar by coal 19 leads to its significant weakening, which reduces the energy intensity of the fracture and increases the speed of excavation.

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When excavating a layer containing rock interlayers, transport vessels 13 are placed between the barrier 6 and the barrier support 11 in the bottomhole space, which are connected to the windows 14 made in the socket 7. The vessels, in addition to their intended purpose, contribute to the board’s immersion cutting cracks due to the strength of the body. Previously, before lowering the transport line after the shield ceiling, the bellows are removed,. spread, free from them the span for the issuance of transport vessels on the horizon for unloading or in the developed space to the place of laying. The pneumatic cylinders are lowered along with the transport line 9 as they move. The released working space along its perimeter is fixed by a permanent support 20, for example, from a hardening material with the help of sliding formwork. Such a scheme can be used when, for example, cutting is performed. In other cases, the technology of excavation can be with the simultaneous laying of the goaf or with the laying simultaneously of the entire strip after the end of its excavation and extraction of the panel ceiling and equipment.

Claims (2)

1. A device for hydromechanical excavation of steep coal seams in a dip, including a shield overlap in the form of interconnected submersible walls with an inclined guard, hydraulic cutters with jet-forming nozzles and a transport line, characterized in that, in order to increase the efficiency of the excavation by reducing the energy intensity of the destruction of coal and the cost of carrying out the workings, the device is equipped with an elastic support. which is installed behind an inclined fence around the transport highway, and the panel covering is equipped with a drilling hydraulic mechanism,. made in the form of blade-shaped working bodies with feeders, which are installed under an inclined fence between the submersible walls with the possibility of frontal movement from under the panel overlap, the base of the submersible walls being made with a central deflection, the inclined fence is provided with a nozzle. 671856 I which is telescopically connected to the transport highway. 2. The device according to claim 1, in that, in order to separate the non-transportable fractions of the rock mass and remove them from the bottomhole space, it is equipped with transport vessels that are installed between the inclined fence and the elastic support, and the pipe is made of windows, the middle of which he communicates with transport vessels. (RMA tt2.5