DE2019063C3 - Device for introducing rock backfilling - Google Patents

Description

30th

The invention relates to a device for introducing rock backfilling with a piston-cylinder drive for shovel-like members which are designed to be foldable during the return movement.

In a known device of this type like her Described in British Patent 950,371 is a pushrod attached to the piston rod provided, which is only able to perform a linear movement, with shovel-like attachments being provided on the pusher blade which, when returning, be able to swing in movement. Since this known device for introducing mountain displacement has its own frame and feet attached to it, which via pneumatic, hydraulic or screw-driven supports against the Hanging walls can be braced, which at the same time absorb the rearward reaction forces of the piston rod; is for the arrangement at the in modern coal mines used gradual expansion not suitable. Hence this well-known prose direction is extremely inelastic and immobile and must be installed separately if the Expansion is progressing.

From the German patent specification 479 571 is also a shaking chute with a device for lateral discharge is known, in which a laterally pivotable by means of coupling and piston rods driven S hv,; ngkörper the mountain offset in connection pushes off the side of the vibrating chute with a rising baffle. A major disadvantage this known device is that the actual device for introducing mountain displacement is completely dependent on the conveyor, its Part of it. Furthermore, it is a disadvantage in this known device that a mountain pillar, the should be made sufficiently tight up to the hanging wall, is only possible by tamping down the backfill material in layers, with the entire bulk in each case

slide to the appropriate height

Starting ⁰¹ "on this prior art, the invention is based on the object to provide a device of the type mentioned, which is expressed in its Aibeitsweise elastic and m its structure comparatively simple

This object is achieved in that the shovel-like, retractable members are in the shape of a circular arc are pivotably arranged on the offset device, which is mounted on an expansion frame in the area of the hanging wall, and its piston-cylinder drive is coupled to the offset device and the expansion frame

Apart from the extremely simple construction and great robustness, the invention achieves the particular advantage that no conveyor extending over the length of the recovery pillar is required. Because the actual displacement device is freely arranged on the expansion frame in an elevated position. In addition, the advantage is achieved that without any change or conversion behind these Versatrvornchtungen a stable Bergepfeiier he can be targeted, which extends in sufficient compression to the hanging wall

A particularly advantageous embodiment of the invention can be created in that a an axis pivotable arm of the Versatzeinrich device carries several shovel-like members.

The invention can be developed in an advantageous manner that the folding axis of each of the scoop-like members are perpendicular to the pivot axis se of the arm.

The present invention also relates to offset devices with a number of devices designed according to the invention, each of which one is attached to an associated expansion frame.

The invention is explained in more detail below with reference to an embodiment illustrated as an example in the drawings

F i g. 1 shows a schematic plan view of the device and

F i g. 2 is a schematic side view of FIG. 1.

In the drawings, part of a route 10 is indicated which leads to a long-front mining operation, not shown, of which hanging wall 12 is carried out striding expansion frame 14 is supported. The route is expanded by arches or rings which are at 16 are indicated.

Recovery offset from a trailing trailing edge (not shown) in the route 10 is introduced in the dam 18 next to the route 10 in order to form a recovery pillar at around 20 and 18. The recovery offset can be thrown off from the location of the tearing via a conveyor (not shown), for example via a protective plate 22, as indicated by arrow A.

A device for introducing the mountain backfill and for promoting the backfill material in the longitudinal direction of the pillar 20 consists of a number of pivotably movable displacement devices 24, one of which is shown and which is attached to a support frame 14 of a stepping construction. Several such facilities, the number of which depends on the Length of the recovery pillar to be produced depends on are inserted in Absländen in the longitudinal direction of the pillar 20.

Each of the displacement devices 24 consists of an arm 26 pivotable about a vertical axis 28 the associated expansion frame 14. The pivoting movement of the arm 26 takes place with the aid of a double-acting hydraulic piston-cylinder drive 29, s which is articulated at 30 on the arm 26 or at 32 on the extension frame 14

The arm 26 is equipped with two scoop-like, retractable members 34, each of which is pivotable about a horizontal folding axis 36 which is generally radial and perpendicular to the axis 28 of the arm. 26 extends Each link 34 can pivot about the folding axis 36 in the direction of the arrows B , but each link is blocked against pivoting movement in the opposite direction beyond the vertical position shown in the drawing

The arm 26 can extend between the illustrated retracted position and a forward position, as shown in FIG. 1 shown by dashed lines, move.

During the pivoting movement of the arm 26 in the direction of arrow C, the links 34 are shown in FIG vertical position blocked and the backfill in front of them is in the longitudinal direction of the pillar 20 emotional; and a portion of the backfill is moved or pressed radially outward and into the dam 18 A part of the backfill is moved in the longitudinal direction from 20 to 18 and finally from the next, adjacent and not shown offset device 24 taken over.

During the angular movement of the arm in the opposite direction to the arrow C , the members 24 can pivot about their horizontal folding axes 36, as indicated by the arrows B , so that they do not move any set material, but slide over the material set below them.

In this way, the offset devices 24 transport the offset which is deposited at the edge of the route, as indicated by arrow A , both in the longitudinal direction of the recovery pillar 20 and transversely thereto into the recovery pillar 20.

Preferably, a protective wall of some type may be arranged at 40 to prevent misalignment from falling to prevent in the occupied by the expansion frame 14 area. It may also be necessary will, however, provide a further protective wall at the distal end of the pillar, not shown this depends on the respective conditions.

The cylinders 29 can preferably be fed in parallel from a common hydraulic pressure source and to connect the hydraulic line to a pressure-dependent control valve under the same pressure, which determines whether the cylinders are extended or retracted.

The entire displacement device can be designed in such a way that the arms 26 of the entire row, which have the least resistance to the movement of the displacement material, are first moved in the direction of the arrows C and then the arms 26, which encounter greater resistance. Only when all arms have completely finished their pivoting movement or each of the arms has moved the greatest possible amount, according to its working conditions, will the general working pressure in the line rise sufficiently to actuate the pressure-dependent control valve. When this is actuated, all of the cylinders 29 are retracted and the next angular movement of the arms 26 and members 34 begins. The whole process is uninterrupted.

Instead of piston-cylinder drives 29, any other type of drive for the pivoting movement can also be used be used, for example a hydraulic angle drive with the help of a pinion and a Rack.

The working angle of the limbs 34 and their height above the lying can be designed to be adjustable, so that an optimum effect can be achieved.

In a modified form of the invention, the arms 26 can also be attached to a horizontal rail of the pit support frame be arranged or hang down from the caps of the extension frame.

Each arm can move at a certain speed in proportion and phase shift to the Neighboring arms are moved.

1 sheet of drawings

Claims (4)

Patent claims: 1. A device for introducing mountain offset with iron Koiben-ZySnder drive for shoe-like members which are designed to be collapsible during the return movement, characterized in that the shovel-like, collapsible ones Links (34) are arranged pivotably in the shape of an arc of a circle on the displacement device (24) an extension frame (14) is mounted in the area of the hanging wall (12) and its piston-cylinder drive (29) on the offset device (24) and the Extension frame (14) is coupled 2. Apparatus according to claim i, characterized in that one about an axis (28) pivotable arm (26) of the displacement device (24) several carries scoop-like members (34) 3. Apparatus according to claim 2, characterized in that the folding axis (36) of each of the fei-like members (34) is perpendicular to the pivot axis (28) of the arm (26). 4. offset devices with devices according to any one of the preceding claims, characterized ge indicates that of a number of displacement devices (24) each one is attached to an associated extension frame (14).