SU1518526A1 - Shield for driving horizontal mine working through frozen rock - Google Patents

Abstract

The invention relates to the mining industry and is intended for the construction of mine workings in particularly difficult mining and geological conditions in a shield method. The goal is to increase productivity when excavating workings by providing directional movement of the shield. For this purpose, along the inner surface of the shell of the jacking section 2, there are guides 12, with which the knife part 1, which is filled with coolant, is communicated. In the knife part 1 of the shield, the heating elements 5 are installed to soften the rock. The heating elements 5 heat up the coolant, which transfers heat to the outer surface of the blade part 1. Under the action of heat, part of the frozen array 29 thaws and the wedge moves apart. The resulting ice-breed cylinder 30 exactly corresponds to the inner diameter of the shield shell. At the end of the jacking section 2, this cylinder is destroyed by the working member. 2 Il.

Description

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ABOUT

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The invention relates to the mining industry and can be used in the construction of mine workings in particularly difficult mining and geological conditions.

The purpose of the invention is to increase productivity when excavating workings by providing directional movement of the shield.

Figs, t. shows a shield, a general view; Fig. 2 shows the guides mounted in the shield shell.

The shield for penetrating horizontal mine workings on frozen rocks includes a shell consisting of knife 1 (fig. 1), jack 2 and tail 3 sections rigidly connected to each other, while in the assembled state their inner shells form a single smooth surface. The knife section 1 is an airtight container 4, the front part of which is made in the form of a wedge with a bevel on the outer side, and the internal volume is filled with coolant (for example, oil) forming together with tsnami 5 attached thereto to soften the frozen rock, the inner surface of the knife section 1 is provided with a heat insulating material 6 and has an annular groove 7 inside which the sealing element 8 is placed. The knife section 1 is connected to the jacking section 2, inside which are placed the hydraulic shifts of the shield 9, in the rear part - the actuator 10, and along the perimeter of the inner surface, at equal distance from each other, grooves 11 are made, in which the guides 12 are mounted, the guides 12 are tubes, the front ends of which are stvom hinges 13 are secured in the slots 11, and rear nip provided with springs 14 provide their output outside the shell.

All the directions of the leg 12 are connected by flexible pipes 15 to collectors 16 connected to the tank, with one of the collectors 16 being provided with a pump 17 providing for the forced circulation of the coolant through the guides 12

The actuator 10 is made in the form of a ring, the inner holes 18 of which are intended to pass the freezing casing 19

the well, and is equipped with a preamp, ohm 20, and a cutting tool 21 with heating elements 22 that heat it, Jack-section 2 is connected to the tail section 3, which houses a block stacker 23, designed to install fixed lining 24, a tray 25 with a sump 26, separated by a net (not shown) intended for dewatering the rock and separating it from the liquid, a conveyor 27 and a sealing element 28 preventing possible breakthrough

water inside the shield from the closed space.

The shield works as follows. Before starting from the installation chamber, one or several wells are drilled in the center of the planned production path, which freezes the flooded array, and the diameter of the frozen array 29 should be equal or slightly higher than the inner diameter of the shield shell. The shield in the installation chamber is installed so that the casing 19 of the freezing well is located against the central hole 18 of the executive body 10, 1 Cyte hydraulic jacks 9, abutting imis in lining 24, the shield is pushed onto the frozen array 29. Tena. 5 knife parts I preheat the coolant in the tank 4, which

5 transfers heat to the outer surface of the blade section 1. Under the influence of heat, part of the frozen array 29 thaws and wedges are moved apart. The resulting ice-breeding cylinder 30 exactly corresponds to the inner diameter of the shield shell, and the thermal insulation material 6 prevents further

... reflow of the ice-breed cylinder 30, 5

The inner surface of the shield shell, in contact with the outer surface of the ice-breeding cylinder 30 when it is pulled over it, prevents the shield from leaving the design route of the passable output, the axis of which is the casing 19 of the freezing well. At the end of the jacking section 2, this ice-breeding cylinder 30 is destroyed by the executive body H, with this, to reduce the cutting power consumption, heat is supplied to the cutting tool 21 from the heating elements 22,

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The ice-breed mass is broken into the tray 25, where it is separated from the water by the net and removed by the conveyor 27. Water enters the settling tank and is removed from it by a pump (not shown). In the initial position, the pump I 7 is turned off and the direction 12 of the ice-breeding cylinder 30 is pressed into the grooves 11. In the case of the start of the shield turning, the pump 17 is turned on and through the pipelines 15 distills the coolant along the guides 12 14 are inserted into the ice-breeding cylinder 30, the furrows are melted in it, Interconnect-. with furrows, guides 12 Prevents shield turning,

F o rmula of the invention

Shield for penetration of horizontal mining operations on frozen po 4 I / // iBfsiHi fff y d 23 3 IIIII L I

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maternity, including a shell with a house- KpaTHoii section and a knife part, which is made with a reverse incline, a ramming of rock formation, a working body and a means of transportation of the shield, characterized in that

by providing directional movement of the shield, it is provided with spring-loaded hollow guides that are located along the inner surface of the jacking section shell, and the rock softening device is made in the form of heaters that are installed in the knife part of the shield, while the knife part is filled with coolant and communicated with hollow guides, and the working body is located in the tail section of the jacking section of the shield.

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Claims (1)

SUMMARY OF THE INVENTION Shield for driving horizontal mining. Of frozen work for 1518526 6 genera, including a shell with a jack section and a knife part, which is made with a reverse slope, a softening device, a working body and a shield transportation means, characterized in that, with. In order to increase productivity when driving workings 10 by providing directional movement of the shield, it is equipped with spring-loaded hollow guides that are located along the inner surface of the jack section shell, and the rock softening device is made in the form of heaters that are installed in the knife part of the shield, while the knife part filled with coolant and communicated with hollow directions. 20 barking, and the working body is located in the tail of the jack section of the shield. Figure 1