RU1781427C - Device for destruction of solid medium - Google Patents

Abstract

Usage: the development of rocks and frozen soils. SUMMARY OF THE INVENTION: a device is installed in a hole. The body cavities are filled with water. Freeze water by circulating refrigerant through channels located in the core. The channel for filling the housing with water is adjacent to the core and freezes first. As a result, water leakage from the housing is eliminated. With further freezing, water acts on the walls of the hole and destroys the rock. Using heating elements, it melts the ice and remove the device from the hole. 1 ill.

Description

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The invention relates to mining, in particular to the development of rocks and frozen soils.

A rock breaking device is known comprising a body, an internal cavity and a heating element for melting ice in the cavity.

A disadvantage of the known device is the lack of fracture efficiency due to the inability to repeatedly load the borehole walls during plastic deformation of its walls.

Closest to the present invention is a device for destroying solid media, comprising a coil body including a core with end disks and longitudinal ribs, channels for circulation of refrigerant are made in the core, a channel for supplying liquid to the internal cavity of the device, and end disks are provided with elastic sealing elements moreover, the device from the side surface can be enclosed in a flexible shell.

The disadvantages of this device are insufficient reliability due to possible fluid leaks, a long time of natural thawing of the parietal fluid layer when it is necessary to remove the device, and insufficient destruction of solid media with increased ductility due to the impossibility of organizing sequentially repeated loading cycles in an expanding hole due to excessively long thawing of the liquid volume in the cavity of the device at positive ambient temperatures Food and the complete impossibility of thawing at low temperatures.

The aim of the invention is to reduce time and increase reliability 00

4 GO 4

bots of the device, as well as destruction efficiency by automatically blocking the channel for supplying liquid to the space between the end disks and reusing the device without changing its position in the hole.

The drawing shows the proposed device.

,. The device consists of a coil housing, including a core 1 with end disks 2 and longitudinal ribs 3. The housing can be closed by a flexible shell 4 along the forming lateral surface. In the core 1, a cooling system is made in the form of channels 5 for circulating refrigerant. The ribs of the end disks 2 are provided with elastic sealing elements 6. In the cavity between the ribs 3, heating elements 8 are inserted, which are located longitudinally in the cavities at the geometric centers of their cross sections. A fluid supply channel 9 is arranged in one of the end disks and is located near the channel 5 for circulating refrigerant between this channel and one of the heating elements. The heating elements 8, with the exception of the one adjacent to the fluid supply channel 9, can be fixed to the end disks through heat-insulating elements 7.

The device operates as follows.

The device is inserted into the hole pre-drilled in the material to be destroyed to the required depth, after which it is filled through the liquid supply channel 9, mainly with water. After filling the device through channels 5, a refrigerant, for example kerosene, is circulated, as a result of which heat is intensively removed from the liquid contained in the device and it freezes, expanding at the same time. First of all, the liquid freezes in the channel 9, since it is located in the immediate vicinity of the channel 5 for circulation of chlorine to the carrier. The liquid frozen in the channel 9 reliably blocks it, which eliminates the possibility of fluid leakage from the cavity of the device through this channel. Since the coil housing of the device, consisting of a core 1, end disks 2 and longitudinal ribs 3, is rigid, fluid expansion

when freezing, it goes mainly towards the side walls, creating bursting forces in the hole, due to which its walls are deformed and destroyed

the solid medium in which it is made. Seals 6 and a flexible sheath 4 serve to prevent leaks from the cavity of the device when the pressure in the gap increases between the end disks 2 and the hole

and cracks and cavities in a destructible medium. After the liquid completely freezes in the cavity of the device, it is melted by means of heating elements 8, while the liquid in channel 9 is also melted and the device is completely filled with water, thereby compensating for the volume by which the borehole walls were reformed. After filling the cavity of the device with liquid, the cycles may be repeated until the solid medium is destroyed. The heating elements 8, with the exception of the liquid supply adjacent to the channel 9 and melting the liquid frozen in it, can be

mounted on the upper end disk on the insulating elements 7, which prevents unproductive heat removal to the upper disk, which does not have a constant

contact with the liquid during thawing.

Claims (1)

SUMMARY OF THE INVENTION A device for destroying solid media, comprising a housing with end disks and a channel for supplying liquid, a core made with channels for circulating refrigerant and placed between the end disks, longitudinal ribs mounted on the core and end disks, and dividing the body into several cavities, sealing elements mounted on end disks, characterized in that in order to increase the efficiency of the device due to the multiple loading of a solid medium, it is equipped with heating to the elements, arranged in a geometric centers of cross sections parallel to the edges of the cavities, and a channel for fluid supply is located in one of the end disks between one of the heating elements and the core and is adjacent to the latter.