RU2361087C1 - Section of support of mini face of thick steeply inclined coal bed - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: invention refers to mining, particularly to design of support of mining face of thick steeply inclined coal bed. The section of the support consists of a base assembled on a bed floor and rigidly connected to a fence with 1-2 layers of burnisher; the fence is normally oriented to the base to the side of the bed support; further the section of the support is equipped with two rams arranged on sides of the base. The rams are made double-advanced. The fence is designed to perform angular rotation by means of horizontal axis and is hinged to a rotary fence; a telescopic screen with a ram is installed in the internal cavity of the rotary fence. A lower telescopic actuator is secured to the base from the side of the face; the actuator is designed to perform angular turn in vertical plane; also the actuator is made in form of a horizontal screw; rotating direction and package of a rim of the actuator facilitate transporting of broken coal in the direction of a flange side of the section. Variable height steps are welded in space between a lower actuator and the fence to the base; the steps form a ladder providing rise from mining side to the side of worked out space and from the flange side to the opposite side. The rotary fence rotating in vertical plane is connected with an upper telescopic actuator from the side of working space. The fence and the rotary fence are equipped with side boards from the flange side; also width of the side boards is not less, than length of double step of advance of the support section, while height of the fence does not exceed height of transport position of the support section.

EFFECT: upgraded efficiency and safety of mining face supporting.

6 dwg

Description

The present invention relates to mining, in particular to the design of the lining of the face of a powerful steeply inclined coal seam, developed in long columns along strike strips along the dip.

Known shield overlap to maintain the working space of the face of a powerful steeply inclined formation, containing a base mounted parallel to the soil of the formation, guards oriented along the normal to the base, means for controlling the height of the fence according to the thickness of the formation and means of forced movement along the line of formation fall [1]. The disadvantage of the analogue is the increased bulkiness of the ceiling mounted from large metal elements that cannot be removed after the strip is removed. In this regard, from the conditions of economic feasibility of using such a shield slab, the excavation strip should have large reserves of coal lying in seasoned mining and geological conditions. Typically, the floor height in mines developing steeply inclined seams does not exceed 100 ... 120 m, which means that the coal reserves in the excavation strip are not enough to economically justify the large amount of installation work and the rejection of the entire amount of dismantling work. As a result, the use of such panel coverings becomes ineffective.

For the prototype lining adopted shield shield lining containing a base mounted on the soil of the reservoir and oriented by its fall; the overlapping of metal beams, covered from above with a wooden block flooring and sheet iron, normally oriented to the base and connected with it; hydraulic jacks mounted on the base [2].

The disadvantages of the prototype are:

- increased risk of breakthrough of collapsed rocks into the working space during the movement of the lining, associated with the absence of side fences;

- the need to install neighboring sections in a line to ensure transportation of chipped coal along the face;

- the absence of a special place where the maintenance personnel could be located during the treatment works;

- increased complexity of dismantling when removing the lining for reuse.

These shortcomings reduce the efficiency and safety of fastening the face of a powerful steep coal seam.

The purpose of the invention is to increase the efficiency and safety of fastening the working face of a powerful steeply inclined coal seam due to the individual aggregation of the lining section and increasing its mobility.

This goal is achieved by the fact that in the section of the lining of the face of a powerful steeply inclined coal seam containing a base mounted on the soil of the seam and rigidly connected to the fence normally with one or two layers of knurling and normally moving towards the roof of the seam, and sliding jacks installed on the side sides of the base, sliding jacks are made of double sliding; the fence is articulated with the possibility of angular movement by means of a horizontal axis connected with a rotary fence; a retractable visor with a jack is installed in the inner cavity of the swing guard; attached to the base from the bottom side is a lower telescopic actuator with the possibility of angular movement in a vertical plane; in the space between the lower executive body and the fence, unequal steps are welded to the base, forming a ladder that provides rise from the bottom side to the worked out space and from the flank side to the opposite; from the side of the working space, a rotary fence with the possibility of rotation in a vertical plane is connected with the upper telescopic actuator; on the flank side, the guard and swing guard are equipped with side shields; moreover, the width of the side panels is not less than the double step of the movement of the lining section, and the height of the fence is not more than the height of the transport position of the lining section.

The invention is illustrated by drawings. Figure 1 shows the installation diagram of the lining section in the working face (side view from the flank side of the excavation strip); figure 2 is the same with the removed side fences; figure 3 - installation diagram of the lining sections in the mounting chamber of the excavation strip; figure 4 - diagram of the final stage of the excavation of the strip; figure 5 - diagram of the translation of the lining section in the transport position; Fig.6 is a diagram of the transport position of the lining section.

The lining section contains a base 1, rigidly connected from the obstructed side with the fence 2 normally oriented to it; swivel fence 3, through a horizontal axis 4 pivotally connected to the upper edge of the fence 2; a latch 5 mounted in the inner cavity of the fence 2 with the ability to move along the normal to the base; retractable visor 6 with a jack 7 installed in the inner cavity of the rotary fence 3; side shields 8 and 9, rigidly connected with the fence 2 and the rotary fence 3, respectively; a telescopic actuator 10 mounted on the base 1 from the face of the face with the possibility of rotation in the plane across the bed; a telescopic actuator 11 mounted on the rotary guard 3 from the face of the face is similar;

ladder 12; the fence 13 and the sliding jacks 14 double sliding, installed in niches on the sides of the base 1.

The staircase 12 is made in the form of uneven steps, providing rise from the bottom side of the lining section to the block and from the flank side of the section to the opposite. Side panels 9 and 8 are welded to the swing guard 3 and guard 2, respectively, from the flank side of the section. The width of the side shield is not less than the double step of the movement of the lining section.

As the executive bodies of the excavating machines 10 and 11, horizontally oriented augers with fists are used to install the cutting tool. At the same time, the flanges of each screw (left or right) are wound in accordance with the direction of its rotation and transportation of the beaten-off coal in the direction of the flank side of the lining section.

The lining sections are installed on the soil of the mounting chamber 15 of the excavation strip in a line between the coal slope 16 and the ventilation slope 17. The sections are mounted flush with the sides to each other and are connected with the jacks 14. The pivoting fence 3 is connected to the fencing 2 via the axis 4, thereby making it possible the angular movement of the rotary fence 3 relative to the fence 2. The fence 3 is oriented normal to the base 1 and fix this position with the latch 5. Jack 7 extend the visor 6 to the right phenomena with the roof of the reservoir. The executive bodies 10 and 11 are attached to the fence 3 and the base 1 from the workspace side. On the other side, one or two layers of damping material, for example, knurling 18, the length of the logs of which is approximately equal to the width of the lining section, are attached to the fences 2 and 3 by means of flexible connections.

The extraction of coal is as follows. First, the section mounted on the flank of the excavation strip, i.e. at the ramp 16. The executive body of the lower excavating machine 10 is cut into the coal mass at the step of moving, after which the coal is chipped by turning the boom in a vertical plane to about the middle of the reservoir thickness, then lowered to the lowermost position, transporting the beaten coal along the face towards the ramp 16. After transferring the lower extraction machine to the transportation position of the beaten coal, the extraction of coal begins with the upper mining machine 11. At the same time, the beaten coal flows by gravity to the lower part of the working areas, from where the executive body 10 is transported to the side of the coal slope 16. After the extraction of coal, this lining section is moved to the step of moving, using one of the two sliding jacks of the moving jack and forming a ledge between the first and second sections. Then, in a similar way, the first and second sections are included in the coal mining operation, using both sliding sliding jacks for this, keeping the step between the sections in one step and forming the same step between the second and third sections. Then, in a similar way, the third, fourth and subsequent sections installed before the ventilation slope 17 are connected to the coal mining operation, as a result of which the face line takes on a step-like shape. Further, the working face is carried out in a similar way. In this case, the beaten-off coal along the ramp 16 flows by gravity to the drift 19 and then is transported to the barrel by a belt conveyor 20.

The maintenance staff is located on the steps of the stairs 12 behind the guard rail 13 of the adjacent lining section, from where it controls the work of the executive bodies, and through these same steps it passes from the working space of one section to the working space of another lining section.

When approaching the first and further subsequent sections of the lining to the conveyor drift 19, the lower extraction machine limits the removable thickness of the layer to a height slightly higher than the height of the lining section in the transport position, and the upper excavation removes coal only in the area of the possible trajectory of the swing guard 3. When the same Thus, in conjunction with a conveyor drift, several lining sections will be stopped, and the sections will be brought to the drift.

The conclusion of the lining section to the conveyor drift is carried out in the following order. First, the lower excavation machine 10 is dismantled, then the same is done with the upper excavation machine 11 and the guard 13 of the staircase 12 is removed. Then two portable hydraulic jacks 21 are installed at the base of the lining section, and they are moved apart to the area of the dismantled upper excavation machine. After that, the section is transferred to the transport position. To do this, the jack 7 retracts the retractable visor 6 into the inner space of the rotary guard 3, removes the latch 5, which holds the rotary guard in the working position, and, reducing the pressure in the piston cavity of the portable hydraulic jacks 21, smoothly rotate the rotary guard 3 around the axis 4 due to the pressure of the collapsed rocks in the worked out space behind the lining. At the end of this rotation, the cantilever edge of the fence is laid on special supports 22. The translation of the lining section to the transport position is completed; the section is divided into three transportable components - two excavating machines and a lining section. Next, flexible ties are destroyed that hold one or two layers of the knurl on the guards 2 and 3, and with the help of a jack of the slide 14, this section is moved in the direction of the conveyor drift. As a result of this movement, the knurl falls to the ground and buzzes the worked out space, thereby protecting the conveyor drift 19 from breaking through collapsed rocks. Next, turn off the hydraulic jack 14 of this lining section from the hydraulic system and disconnect it from the adjacent lining section. Then, with the means of dismantling, this section of the lining is brought out to the conveyor drift 19. The withdrawn section of the lining after preventive maintenance is mounted in the next mounting chamber.

Features of the lining section, distinguishing it from the prototype and analogues, are:

- individual aggregation of sections allows you to dial a set of equipment of any length depending on mining and geological conditions, for example, disturbance of the reservoir, i.e. allows you to take stocks between violations;

- there is no need to move mining and transport vehicles along the line along the face, which increases the reliability and safety of the face;

- simplicity of design, requiring for the manufacture of mainly welding work;

- the organization of a regular place equipped for the safe accommodation of staff;

- the presence of side shields on the flank side of the section allows you to organize a stepped shape of the face to protect the working space from the penetration of collapsed rocks;

- folding lining in height more than double provides its dimensions in the transport position, comparable with the standard dimensions of the preparatory workings, which increases its maneuverability and reduces the complexity of installation, dismantling and delivery work;

At present, there are no effective means of mechanization of treatment works on powerful steeply inclined formations, so the load on the working face is 250-350 tons / day using unsafe drilling and blasting technology. The proposed mechanized lining allows you to mechanize the basic operations of the technological cycle, to increase the efficiency and safety of fastening the working face and the development of steeply inclined coal seams. This indicates the achievement of the purpose of the invention.

Information sources

1. A method of developing powerful steeply inclined coal seams and shield overlap for its implementation. RF patent No. 2069267, publ. 11/20/96, Bull. No. 32 (analogue).

2. The technology of shield mining of coal deposits / Kurlenya MV, Zvorygin LV, Lebedev AV - Novosibirsk: Science, Sib. Department, 1988, pp. 80-81, Fig. 2.10, b (prototype).

Claims (1)

A section for supporting a face of a powerful steeply inclined coal seam, comprising a base mounted on the soil of the seam and rigidly connected to the fence normally facing one side of the seam roof with one or two layers of knurling, and shifting jacks installed on the sides of the base, characterized in that the sliding jacks are made of double sliding, the guard is articulated with the possibility of angular movement by means of the horizontal axis and is connected with the rotary guard, in the inner cavity For this fence, a retractable visor with a jack is installed, a lower telescopic actuator is attached to the base from the bottom side with the possibility of angular movement in the vertical plane, in the space between the lower actuator and the guard, uneven steps are welded to the base, forming a ladder that provides lift from the bottom side to the side the worked space and from the flank side - to the opposite, from the side of the working space rotary fence with the possibility of rotation and in a vertical plane is associated with the upper telescopic executive body with flank side rail and swivel rail provided with side shields, the width of the side panels is not less than the magnitude of the double step of advancing support frame and the height of the fence - no more than the height position of the vehicle support frame.

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