RU2235202C1 - Narrow-cut machine for coal extraction from steeply inclined bed - Google Patents

Abstract

FIELD: coal producing industry.

SUBSTANCE: machine has traction-towing device, sprinkling device, two height-adjustable operational tools with horizontal axis of rotation, two swiveling arms and case in which two cutting unit reducers and electrical drive are installed. Machine case is arranged on guide beam and may reciprocate along thereof. Machine case is connected to guide beam by hydraulic jack. Traction-towing device is fixed to guide beam end. Operational tools are formed as augers with cutters. Auger nearest to traction-towing device is arranged on swiveling arm and provides cutter movement from ground to bed top in area of contact thereof with coal formation when machine follows traction rope. Rib of above auger is coiled in direction which provides broken coal pieces movement from guide beam. Outermost auger is arranged so that cutters move in opposite direction. Rib of outermost auger is coiled in direction which provides broken coal pieces displacement towards guide beam. Guide beam has raised floor, grab handle and fence.

EFFECT: increased efficiency due to guide beam provision.

6 dwg

Description

The invention relates to mining, in particular to narrow-cut combines for the extraction of coal from steeply inclined seams during mining of the latter according to the development system with long posts along strike.

Known narrow-angle combine for the extraction of coal from steep and steeply inclined coal seams, containing a drive mechanism, an actuator drive gear reducer, a tow hitch, a support ski, an irrigation system, a ski for lowering the combine, an adjustable and unregulated executive bodies [I]. The disadvantages of this combine are: insufficient regulation range of the installation height of the executive body, sharply limiting the scope of the combine; the impossibility of bilateral (shuttle) coal mining, reducing the efficiency of the development of steeply inclined coal seams; insufficient level of mechanization of excavation work in the face: the need for a niche for pairing lava with a conveyor drift for cutting a combine into a new strip; the need for manual work in the upper part of the lava due to unregulated height of the front executive body.

A narrow-grip combine harvester was adopted as a prototype, comprising: two height-adjustable actuators, a gearbox for the cutting part, an electric motor, a downhole ski, a tow hitch, an irrigation device [2].

The disadvantages of the prototype are:

- the lack of a regular place where the combine operator could be located during the extraction of coal by the combine;

- insufficient regulation range for the height of the executive bodies;

- the need for manual operations to design the face in the upper part of the lava, due to the distance from the line of cutters of the upper executive body to the end of the towing device;

- the complexity of notching the combine into an array not only in the upper, but also in the lower part of the lava.

These shortcomings reduce the capabilities of a mining combine, do not allow it to be used in the development of medium-sized coal seams, which, in turn, reduces the efficiency of developing steeply inclined medium-sized and powerful coal seams when dividing the latter into layers.

The purpose of the invention is to increase the efficiency of development of steeply inclined formations by equipping the harvester with a guide beam.

This goal is achieved by the fact that, in a narrow-grip combine for steeply inclined formations, containing a towing device, an irrigation device, two height-adjustable actuators with a horizontal axis of rotation, two swinging handles and a housing in which two cutting part reducers and an electric motor are installed , the harvester housing with the possibility of reciprocating movement is mounted on the guide beam and connected with it by a hydraulic jack, the towing device is rigidly connected with the end of the guide beam, the executive bodies are made in the form of a screw with cutters, and the screw closest to the towing device is mounted on a swinging arm with the ability to ensure the movement of cutters from the soil to the roof of the formation in the area of their contact with the coal mass when the combine follows the traction rope and the flange is wound in the direction that ensures the movement of the beaten-off coal to the side of the guide beam, the distant screw is mounted on the swinging handle with the possibility of ensuring the movement of the incisors in the opposite direction, its ribs lard is wound in a direction to the movement of coal chipped towards the guide beam; the guide beam is equipped with a raised floor, a handrail and a protective fence.

The invention is illustrated by diagrams. Figure 1 shows the layout of the harvester (front view), figure 2 is the same (plan view), figure 3 is the same (rear view), figure 4 is the guide beam (front view), figure 5 is the same (plan view), figure 6 is the same (end).

Narrow-grip combine for excavating coal from steeply inclined seams contains: electric motor 1, left 2 and right 3 gearboxes enclosed in the housing, left 4 and right 5 screw augers, left 6 and right 7 swing arms, guide beam 8, made in the form of a bed and having a length of not more than the length of the combine, measured by auger actuators, a towing device 9, a hydraulic jack 10 for moving the housing along the guide beam, a device 11 for the kinematic connection of the housing with the guide beam, irrigation w installation.

The body of the harvester is mounted on the guide beam 8 and kinematically connected with it by means of a device 11 and a hydraulic jack 10.

The gearbox 2 provides the rotation of the screw Executive body 4 (the first upstream of the combine along the lava), in which its teeth, which entered into interaction with the coal mass in the ledge, move from the soil to the roof (due to this, the stability of the combine in the face). In this case, the flange of the screw 4 with the fists for setting the teeth during rotation provides transport of the beaten-off coal to the side of the combine body, i.e. to the face. The reducer 3 provides the rotation of the screw 5 (rear along the combine up the lava) in the opposite direction, and the flange of this screw provides the transport of broken coal along the ledge towards the side of the combine, i.e. from the bottom.

The guide beam (solid or composite) contains a L-shaped base 12, at least two bushings 13, an arm 14, stiffeners 15, a raised floor 16, a handrail 17 and a guard 18.

The L-shaped base 12 is installed on the soil of the formation and is oriented upward with the short shelf normal, and the short shelf is placed on the obstructed side. The bushings 13 are part of the device 11 and are welded to the base 12 at the bottom edge. The bracket 14 is welded to the base close to the towing device 9. The raised floor 16 is made in the form of a lattice with transversely oriented rods and is mounted at a height from the long shelf of the base 12, equal to the height of the bracket 14 and supported along the entire length of the beam by stiffeners 15. Handrail 17 it is installed parallel to the base at a certain height from it and is closed from the bottom by a fence 18 designed to protect the hands of combine operators from blows of pieces of broken coal.

The work of the combine for the extraction of coal is as follows. In the initial position, the combine is located in the lower part of the left-side face, the screw 4 is installed at the soil of the formation, and the screw 5 is installed at its roof. The guide beam 8 is advanced forward relative to the combine body by the entire stroke of the jack 10. The combine driver, located on the raised floor 16 of the guide beam 8, includes a drive for the cutting part of the combine, and then a feed drive for the combine, i.e. winch mounted on the ventilation drift. The coal beaten off by the screw executive body 4, through the soil of the seam enters the gap between the body of the combine and the face, and then gravity rushes to the lower part of the lava. The coal beaten off by the screw executive body 5 also flows by gravity down the lava. Guide beam 8, relying on the bottom with its console, i.e. its part, ahead of the combine body, limits the depth of the executive body 4 into the mineral array. The combine driver, located on the guide beam 8 behind the combine body, controls the operation of the executive body 4, the assistant driver, located on the same beam, controls the operation of the executive body 5 by the angle of the swinging arm 6.

Upon the output of the combine to the ventilation drift with a jack 10, the combine body is moved to the opposite extreme position relative to the guide beam, i.e. eliminate the leading part of the guide beam 8, which limits the depth of the executive body. In this position, the strip of coal that is removed is completely cleaned and the harvester is notched into the massif by an oblique run. For this, the combine is idled down the lava by about 20 meters, then the deflecting rollers of the traction and safety ropes are moved to the side of the face moving on the ventilation drift, thereby ensuring an increase in the component of the combine’s gravity directed towards the face. After that, the combine is turned on. The harvester moves up the lava and is embedded in the array.

At the end of the notch, the lining sections are moved and the combine is prepared for excavation of the next strip of coal when the combine moves from top to bottom. For this, the screw actuator 5 is installed at the level of the soil of the formation, and the actuator 4 is installed at the level of the roof of the formation.

When the combine moves down the lava, the guide beam 8 again ahead of the combine body and limits the introduction of the combine into the coal mass. The executive body 5 carries out not only the breaking of coal from the lower pack, but also unloads the coal beaten from the upper and lower packs onto the combine road from the ledge.

Upon the combine’s exit to the conveyor drift, the combine’s body is again transferred to the lower part of the guide beam, the remaining part of the strip is stripped and the harvester is cut into a new strip. To do this, the combine with both screws lowered to the soil of the formation is raised along the lava by about 20 meters, then they are lowered. In this case, the screw 5 under the influence of the lateral component of the gravity of the harvester and due to the direction of winding the flanges is introduced into the array (the operation is repeated if the required notching value has not been achieved at one time). Further as described above.

Thus, due to the installation of the guide beam and only partial occupation of its area by the body of the combine, it becomes possible to place the operators of the combine on it. This, on the one hand, increases the convenience of managing the harvester during operation and the safety of maintenance personnel, and on the other hand, it increases the efficiency of breaking coal, since the driver, who is in a regular place, can always monitor the level of installation of the screw relative to the roof or soil of the formation. The movable connection of the combine harvester body with the guide beam allows more fully mechanizing the process of breaking off coal, in particular, in the zone where the lava is connected with drifts and eliminates the need for excavation of niches. All this helps to increase the efficiency of the development of steeply inclined coal seams, and this is the purpose of the invention.

Sources of information

1. Equipment for the mechanization of sewage treatment in coal mines. Ed. B.F. Bratchenko, - M .: Nedra, 1972, p.206-210, Fig. III-24.

2. Complex mechanization and automation of sewage treatment in coal mines. Under the general ed. B.F. Bratchenko. - M .: Nedra, p.208-211, Fig. 4.11. (prototype).

Claims (1)

Narrow-grip combine for the extraction of coal from steeply inclined seams, containing a towing device, an irrigation device, two height-adjustable actuators with a horizontal axis of rotation, two swinging handles and a housing in which two cutting gears and an electric motor are installed, characterized in that the combine body with the possibility of reciprocating movement is mounted on the guide beam and connected with it by a hydraulic jack, the towing device is rigidly connected with the end face of of the beam, the actuators are made in the form of screws with cutters, and the screw closest to the towing device is mounted on a swinging arm with the ability to ensure the movement of cutters from the soil to the roof of the formation in the area of their contact with the coal mass when the combine follows the traction rope and the flange is wound in the direction that ensures the movement of the beaten coal away from the guide beam, the distal screw is in the opposite direction, its flange is wound in the direction that ensures the movement of the beaten coal in the direction of ravine beams; the guide beam is equipped with a raised floor, a handrail and a fence.

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