SU1735580A1 - Face complex - Google Patents

Abstract

Usage: conveyor-margin excavation of very thin flat seams. SUMMARY OF THE INVENTION: The frontal assembly comprises lining sections, an actuator with a pull chain, and carriages with front and outer faces. On the front side of each carriage, the shares are mounted, over which the visors are installed. The outer face of the carriage is located at an acute angle to its front face. The inclined surfaces of the plowshare and the visor are located at an angle of more than 90 ° C. to the front of the carriage.3 Il.

Description

The invention relates to the mining industry, in particular, to means of a conveyor-and-arc excavation of very thin gentle seams.

The known excavation and hauling machine, which is a multi-circumferential installation of the frontal type, consists of a sectional guide beam, a scraper-cutting chain with a contour closed in a vertical plane, and a dark-telescopic movement mechanism.

The disadvantage of the device is low productivity with high energy consumption of transportation due to high values of resistance to movement of the cutting carriages when the sectional guide beam is lowered, the loss of coal in the gaps and the transfer of coal through the tool carriages and transporting scrapers.

Closest to the present invention is a frontal unit, including lining sections, an actuator with a pull chain closed in a vertical plane, carriages with front and outer faces, which are placed on the guide rails and are mounted for movement relative to the sectional base beam.

The disadvantage of the device is low productivity with high energy consumption of transportation and low grade coal mined due to loss of coal in the gaps and coal transfer through the carriages (coal circulation), high values of resistance to movement of the carriages when lowering the conveyor angle and the outer faces of the carriages and shattered coal.

The whole of the invention is to increase the productivity of the frontal unit while reducing the energy intensity of transportation and improving the grade of coal.

FIG. 1 shows the section of the executive body and the base front beam

H

IGO ate ate

00

about

unit, a general view from above; in fig. 2 shows section A-A in FIG. one; in fig. 3 - view B of FIG. 2

The frontal unit consists of the executive body (conveyor-circle) 1, sectional base beam 2 with inclined guides 3 and lining sections (not shown).

The executive body 1 consists of two drive stations located in adjacent mine workings (not shown), staging 4, cutting 5 and transporting 6 carriages, which are interconnected by a traction chain 7 and mounted on rails 8 of the staging 4 with the possibility of movement relative to sectional base beam 2. T beha chain 7 is closed in a vertical plane.

Becoming 4 executive body 1 is located along the bottom. Its ends are attached to the drive stations. Becoming 4 consists of interconnected sections, the length of which is a multiple of the step of installing the lining sections.

The base beam 2 consists of linear sections 9, the length and connection of which are similar to each other are the linear sections of post 4. Each linear section 9 of the base beam 2 is made in the form of a frame 10 with an inclined guide 3, a bracket 11, a lever 12 connected to an actuator (pipeline) 1, and a vertical cylinder 13,

The incisal 5 and transporting 6 carriages are equipped with plowshares 14 and visors 15 installed on the front face 16 of the carriages 5 and 6, perpendicular to the soil of the formation and staged 4.

The ploughshare 14 is mounted on the front face 16 of the outer face 17 of the carriages 5 and 6 adjacent to the inclined guide 3 and the soil of the formation (external to the guide 8).

The visor 15 is mounted on the front face 16 above the share of 14 at the inner face 18 of the carriages 5 and 6 (adjacent to the guides 8) adjacent to the rails 8.

The inclined surface 19 of the plowshare 14 and the inclined surface 20 of the visor 15 are located towards the front face 16 of the carriages 5 and 6, respectively, at obtuse angles 01 and 02, and the magnitude of obtuse angles p r and rtr, where p Tr is the friction angle of the material being transported on the metal (coal angle pmetallu r 19-23 °). The magnitude of obtuse angles is ang.

01 and 0 2 when transported in the range of 90 °

The outer face 17 of the carriages 5 and 6, adjacent to the soil of the working and inclined guide 3, is located at an acute angle (i) to its front face 16, and

/ 3 90 ° -arctg-gD, where VB is the lowering speed of the rod 4, Vr is the speed of movement of the carriages 5 and 6 along the guides 8.

Thus, the angle between the inner 0 face 18 of the carriages 5 and 6 and the inclined surface 20 of the visor 15 is smaller than the friction angle

RF - Angle between inclined surface 19

plowshares 14 and guides 3 and 8, along

5 of which coal moves, is also less than the friction angle of T.

Frontal unit works as follows.

When the driving stations operate, the carriages 5 and 6 are moved by the swivel chain 7 along the guides of 8 linear sections of the rod 4 of the executive body 1.

When the unit is frontally fed to the bottom by means of horizontal cylinders of the support sections, the destruction of the coal occurs simultaneously along the entire length of the cutting tool carriages 5.

When extending the rods of the vertical cylinders 13 by the working fluid (emulsion), the installation of 4 of the executive body 1 on the reservoir thickness is performed using levers 12 pivotally mounted in the brackets 11 frames 10 sections 9 of the base beam 2.

5 Destroyed coal falls on the soil of the formation and on inclined guides 3 and carriages 5 and 6. The lower branch of the traction chain 7 is transported to the adjacent mine workings.

0 Directly the process of coal transportation is carried out by the front face of 16 carriages 5 and 6 of the lower branch of the traction device 7. When transporting the bulk of the destroyed coal, levers

5 12 and guides 8 are in the lower position (transport position). When lowering the bed 4 from the upper position to the transport position, the working process is not interrupted, the carriages 5 and 6 move along

0 by guide 8, carried out the processes of cutting and transporting coal.

The carriages 5 and 6 make a complex movement of this kind with a speed V, folding from the vertical component

5 of the movement of the carriages 5 and 6 with the speed VB (speed of lowering of the gate 4 of the executive body 1) and the horizontal component of the movement of the carriages 5 and 6 with the speed Vr

(speed of movement of the carriages 5 and guides 8). The angle between the vector VjЈ direction of transportation of the angle Vr

VB is equal to z arctg-y-, deg., Acute angle

between the front face 16 and the outer face 17 of the carriages 5 and 6 is equal to /, and the magnitude of the acute angle / satisfies the condition ft 90-а. When lowering the stave 4, the carriages 5 and 6 moving along the lower branch of the traction device 7 interact with the broken coal not only with the entire surface of the outer face 17, but only with the point of the plowshare. Also, since the angle between the inclined surface 19 of the plowshare 4 and the vector the speed of movement of the carriages Vr (the direction of transport) is less than the angle of friction, it is easier to insert the plowshare 14 of the carriages 5 and 6 into the lying coal, and the resistance to movement of the carriages 5 and 6 is reduced.

Thus, the outer edges 17 of the carriages 5 and 6, adjacent to the soil of the formation and the inclined guide 3, do not come into contact with the broken coal, do not compress or crush it. As a result, when lowering the slide 4, the forces of resistance to movement of the cutting 5 and transporting 6 carriages decrease, and consequently, the power consumption of the delivery decreases, and the productivity of the frontal unit increases. In addition, during transportation, the quality of broken coal is not deteriorated, dust generation is reduced.

After becoming 4 the executive body 1 is lowered into its lower position, carriages 5 and 6 carry out the process of transporting coal to the adjacent mine workings.

Since the inclined surface 19 of the plowshare 14 is located to the outer face 17 of the carriages 5 and 6 of the executive body 1 at an angle smaller than Tr, the broken coal rises from the formation soil and the inclined guide 3 of the plowshare 14. Due to this, the loss of coal in the gap between the carriages 5 is reduced and 6 and the soil of the formation, the carriages 5 and 6 and the inclined guide 3. Since the angle between the inclined surface 20 of the visor 15 and the front face 16 is larger

the friction angle tp Tr, then the visor 15 prevents the coal from raising further along the front face 16. Therefore, the visor 15 prevents the coal from being thrown through the carriage 5 (6) of the actuator 1, due to

which eliminates circulation and increases the volume of coal transported.

Thus, there is an increase in the productivity of the frontal unit while reducing the energy consumption of transportation and improving the grade of coal.

The numerical value of the angle between the outer 17 and the front 16 faces of the carriages 5 and 6 is taken depending on

5, the magnitudes of the speed of movement of the carriages 5 and 6 along the guides 8, the lowering speed of the rod 4, the design parameters and dimensions of the carriages 5 and 6.

For frontal units for excavation

0 thin and very thin flat layers of the AFC type, the angle between the outer and front faces of the carriage of the executive body is 75-81 °, and the angle between the front face of the carriage and inclined surfaces of the plowshare and the visor is 103-107 °.

Claims (1)

Claims of the invention A frontal assembly, including lining sections, an actuator with a vertical chained whip and a carriage with front and outer faces, which are placed on the guide rails and are movable relative to the sectional base beam, characterized in that 5 in order to increase its productivity while reducing the energy intensity of transportation and improving the grade of coal, it is equipped with plowshares and visors, while the plowshares are mounted on 0 of the front face of each carriage of the executive body, and the visors are installed above the shares of the plowshares, with the outer edge of the carriage of the executive body located at an acute angle to its front face, and 5 inclined surfaces of the plowshare and the visor are located to the front face of the carriage of the executive body at an angle greater than 90 °. Pt / S. / fS A-A  7 & ЈL U / XXX // Ј  /  W. Ј / Rig.2 I 4J