RU2253018C2 - Mechanized support for extracting massive steep-dipping deposits - Google Patents

Abstract

FIELD: mining industry.

SUBSTANCE: device has flexible ceiling, sections, having face and goaf portions and including base, supporting and limiting ceilings, hydraulic posts, moving hydraulic jack, side shields for supporting and limiting ceilings, extended by hydraulic jacks, and is provided with flexible ceiling. Its sections are connected in couples by hydraulic cylinders, jointly mounted on bases of these sections respectively on face and goaf portions thereof with possible force interaction for changing distance between sections during change of face length, appropriate for massiveness of ore body.

EFFECT: higher reliability.

5 dwg

Description

The technical solution relates to mining and can be used to develop powerful steeply falling kimberlite deposits under flexible overlap.

Known mechanized lining UKP 5 (Machines and equipment for mines and mines. Directory, S.Kh. Klorikyan, V.V. Starichneva, M.A. Srebny, etc. M .: Publishing house of the Moscow State Mining University. - 1994, p. 71 ) a support-supporting type, consisting of sections, including a base and a protective overlap, connected to each other by a connector, a hydraulic stand, a telescopic visor that can be pulled out using a hydraulic jack. The device for moving the section consists of a guide beam and a hydraulic jack for movement. The section is kept from sliding down during movement by the guide beam and the lateral emphasis of the base against the adjacent section, and from the side roll by the hydro-squeegee that is pulled out from the protective overlap.

The disadvantage of this design is the impossibility of regulating the distance between the bases of the sections of the mechanized roof support with a varying power of the ore body, which will not allow for reliable control of the roof, and it is not designed to work under flexible overlap.

In addition, the well-known mechanized support for A.S. USSR No. 443996, E 21 d 23/00, publ. in BI No. 35, 1974, consisting of a base beam and sections, each of which includes a base, a guard and support shield with a hatch, a backrest, water stands and a machine for weaving flexible overlap bands. A slide is attached to the base beam by hinges, each of which is connected by levers to the back of the section support fence.

The disadvantage of this design is that in the mechanized lining, operating under flexible overlap, sections are not allowed to slide apart, so it cannot be used when mining kimberlite deposits with a variable ore body thickness.

The closest in technical essence and the achieved effect is the mechanized support Ml44 (Machines and equipment for mines and mines. Handbook. S.Kh. Klorikyan, V.V. Starichneva, M.A. Srebny, etc. M .: Publishing house of the Moscow State Mining University . - 1994, p.63-64) supporting-protective type, connected to the downhole conveyor using hydraulic jacks to move the sections and conveyor. Mechanized lining sections include four hydraulic stands installed in pairs under the supporting and protective parts of the ceiling. The lateral panels that are retractable from the floor using hydraulic jacks, which are available both at the supporting and at the protective part of the floor, protect the lava working space from the penetration of roof rocks and collapsed rocks and level sections.

The disadvantage of this design is that it has very limited possibilities for changing the length of the bottom, therefore, when changing the power of the ore body, it is impossible to increase the distance between the sections of the powered roof support and, therefore, to ensure reliable control of the roof, and the powered roof support is not designed to work under flexible overlap.

The technical task of the proposed solution is reliable roof management in the worked out space along the length of the working face in a powerful steeply dipping field with varying ore body thickness due to the possibility of arbitrary change in the distance between the support sections with a change in the face length corresponding to a change in the ore body power.

The task is achieved in that the mechanized support for the development of powerful steeply falling deposits, consisting of sections having a bottomhole and blockage parts and including a base, supporting and protective floors, hydraulic stands, hydraulic jacks for movement, side shields of supporting and protective floors, retractable with hydraulic jacks, according to the technical solution is equipped with flexible overlap, and its sections are interconnected in pairs by hydraulic cylinders pivotally mounted on the bases of these ktsy respectively with downhole goaf and parts thereof, with the force interaction for changing the distance between the sections when changing the face length corresponding change in orebody power.

Significant differences of the solution are as follows. Mechanized lining is equipped with flexible overlap, which allows to protect the working space from rock outfalls at all stages of technological operations, including the movement of these sections, providing reliable roof management along the length of the working face.

Mechanized lining sections are interconnected in pairs. This embodiment allows you to arbitrarily change the distance between each of the pairs of sections of the mechanized lining, which simplifies the scheme of the extension of the mechanized lining when changing the power of the ore body and allows you to get the required size of the face within the structurally specified dimensions, for example, increasing the mechanized lining by 30% of its length.

The sections are interconnected by hydraulic cylinders pivotally mounted on the bases of these sections with the bottomhole and block parts, with the possibility of force interaction to change the distance between the sections when changing the length of the bottom, corresponding to a change in the ore body power, which avoids the occurrence of super-permissible forces in the hydraulic jacks when moving the sections and distortions, as well as control the trajectory of movement of both the section and the entire mechanized lining. Thus, the movement of the lining sections along the lava when lengthening or shortening the face is carried out using hydraulic cylinders connecting the base of the sections in pairs, which allows you to move the sections along the bottom and the conveyor beam, increasing or decreasing the gaps between the pairs of sections, thereby increasing or decreasing the length of the supported roof.

The essence of the technical solution is illustrated by an example of a specific design and drawings, where:

figure 1 presents a schematic diagram of a powered lining for the development of powerful steeply dipping deposits;

figure 2 is the same, a section aa;

figure 3 is a diagram of the movement of pairs of sections of powered lining when changing the power of the ore body (first stage);

figure 4 is a diagram of the movement of pairs of sections of powered lining when changing the power of the ore body (second stage);

figure 5 is a diagram of the movement of pairs of sections of powered lining when changing the power of the ore body (third stage).

Mechanized lining for the development of powerful steeply falling deposits (hereinafter, lining) consists of a flexible floor 1 made, for example, of three logs, sections 2 (figure 2), having a bottomhole 3 and a block 4 parts (figure 1) and including a base 5, supporting 6 and fencing 7 floors, water resistant 8.

The base 5 is connected to the beam 9 (figure 2) downhole conveyor 10 using hydraulic jacks 11 movement.

Section 2 lining pairwise interconnected by two hydraulic cylinders 12 (figure 2), pivotally mounted on the base 5, respectively, with bottomhole 3 and heaped 4 parts of section 2 with the possibility of force interaction to change the distance between sections 2 (1) and 2 (11) ( figure 3) when changing the length of the face (not shown), corresponding to a change in the power of the ore body.

On the fence 7 and supporting 6 floors installed side shields (not shown), retractable using hydraulic jacks (not shown).

Mechanized support for the development of powerful steeply dipping fields works as follows.

Mining of ore in the face is carried out by a combine (combine harvester not shown) to the face conveyor 10 under the protection of a flexible floor 1 and lining. After the harvester has removed the next kimberlite ore chips, it is followed by the sequential movement of the conveyor 10 and the support sections 2 by a step equal to the value of the removed chips. Such an operation is carried out in a known manner with the help of hydraulic jacks 11 of the movement connecting the base 5 of section 2 with the beam 9 of the conveyor 10. The hydraulic jacks of 11 movement first move the conveyor 10, and then under reduced pressure in the hydraulic stands 8 - section 2 of the lining (figure 2). At this moment, the hydraulic cylinders 12 do not work at a reduced pressure level in the working cavities, but only monitor the movement of the sections 2. At the end of the movement, the working pressure is again applied to all the moved sections 2 of the lining, and they burst between the soil and the roof through a flexible ceiling 1.

When changing the power of the ore body, there is a need for a corresponding change in the length of the bottom, for which the sections 2 of the lining are moved using hydraulic cylinders 12, pivotally mounted on the bases of these sections 2, respectively, with the bottomhole 3 and the block 4 of their parts with the possibility of force interaction to change the distance between sections 2 when changing the length of the face, corresponding to a change in the thickness of the ore body.

An example of such a movement of sections 2 (1) and 2 (11) is shown in Figs. 3, 4, 5. When, when mining a layer of kimberlite ore, for example, an increase in the ore body power occurs, the end support section 2 (11) is at some distance from edge of the face (figure 3). In order to move sections 2 (1) and 2 (11) to the edge of the face, in order to avoid sagging of the flexible overlap 1 and dumps of collapsed rocks into the face, it is necessary to carry out sequential movement of several pairs of sections 2 (1) and 2 (11) (depending on the magnitude of the changed thickness of the ore body).

In the initial position, sections 2 (1) and 2 (11) support the roof, they are spread between the soil and the roof through a flexible ceiling 1. To move section 2 (11) in its hydraulic pillars 8, they reduce the spacer by connecting them to the drain, and into the hydraulic cylinders 12 serve the working fluid under pressure. Section 2 (11) with hydraulic cylinders 12 moves by a structurally predetermined value (FIG. 4) and then, by means of hydraulic struts 8, again bursts between the soil and the roof through a flexible ceiling 1 (FIG. 5).

Subsequently, in section 2 (1), the same sequence of operations is carried out:

reduce the spreader in the hydraulic struts 8, and the hydraulic cylinders 12 supply the working fluid under pressure and pull up the section 2 (1) to section 2 (11) (Fig. 5), after which the hydraulic fluid is again supplied to the hydraulic struts 8 of section 2 (1) under pressure, and it bursts.

Each of the pair of sections 2 is sequentially, with a reduced thrust, first moving the first from the second to a new place, and then pulling the second to the first. At the same time, after each movement of the corresponding section, the working resistance in the hydrostations 8 is restored in order to ensure the maintenance of the worked out space. The ability to move each pair of sections 2 lining allows you to simplify the movement scheme, since you can arbitrarily change the distance between each pair of sections 2.

The lining has a minimum length when its sections 2 are located at a minimum permissible, structurally specified distance from each other, and the maximum - when the distance between the lining sections 2 in a pair is equal to the working stroke of the hydraulic cylinder 12 and the maximum allowable structural distance is established between the pairs of sections 2. If necessary, in order to avoid sagging of the flexible floor 1 between the support sections 2, the hydraulic jacks (not shown) extend the retractable side shields (not shown) mounted on the supporting 6 and protecting 7 floors.

Thus, a decrease or increase in the total length of the lining along the face is carried out, which allows for reliable control of the roof in the worked out space when the ore body bed thickness changes.

Claims (1)

Mechanized support for the development of powerful steeply falling deposits, consisting of sections having a bottomhole and blockage parts and including a base, support and guard floors, hydraulic stands, a hydraulic jack of movement, side shields of support and guard floors, retractable by means of hydraulic jacks, characterized in that it is equipped with a flexible overlapping, and its sections are pairwise interconnected by hydraulic cylinders pivotally mounted on the bases of these sections, respectively, with their downhole and overwhelming astyami force interaction with the possibility to change the distance between the sections when changing the face length corresponding change in orebody power.

Images