DE2222801A1 - PROGRESSIVE EXPANSION FOR EXTRACTION PLANTS AND PROCESSES FOR THE DISMANTLING OF STORAGE FACILITIES, IN PARTICULAR IN BRIEF WITH EXTRACTING MACHINE IN FRONT OF THE HEAD - Google Patents

Description

Westfalia Ironworks Union, 4628 Altlünen

S _c hreitender expansion of mining operations and procedures to reduce deposits, especially in short stays with working front head mining machine

The invention relates to a progressive expansion for mining operations, especially for short struts, where the extraction with the help of a cutting head working in front of the head Extraction machine takes place, with the expansion from expansion frames provided with pre-pledged caps, connected to form a team exists, which at their base connections between the rams via steering knuckle pieces to a parallel guide and rear device are connected. The invention also relates to a method for dismantling a

309847/0187

-P-

Deposit in a short-walled operation using a longwall construction consisting of expansion teams.

Extension racks in which two or more frames become one so-called expansion team are connected in such a way that the frames in alternating sequence and with mutual support can be moved, are known in various designs. Expansion spans have proven themselves in practice, in which the frames at their sole connections consisting of leaf springs in the area between the stamps via steering knuckle pieces, which also consist of leaf springs, are connected to a parallel guide and return device arranged between the frames. The latter exists from a rear cylinder with a continuous piston rod protruding from the cylinder on both sides, on both of them Ends a protective housing encompassing the cylinder is attached. The arrangement is made so that the Steering knuckle connection in the middle area of the rear cylinder takes place from one frame with the protective housing and from the adjacent frame with the cylinder. the The invention relates primarily to expansion teams of this type.

Expansion teams of this or a similar type are used in G-ewinnungsbetriebe used. that they cover the hanging wall as broadly as possible and over the entire surface area between the working face and fracture space undertake. It is known to provide the caps with slidable or pivotable pre-pledging caps.

30 ;; 347/0187

arrange to the hanging wall immediately after passing the mining machine to be able to undertake in the extraction field.

For extraction in short struts, i.e. in those mining operations where the coal or the like. at a relatively short mining thrust is obtained, one uses, among other things, mining machines that work in front of the head, such as a so-called continuous miners, which work with excavation depths of several meters, e.g. 3 m. It is there too known to attach a so-called drag conveyor to the extraction machine, which is used by the extraction machine in the Extraction drive followed and over which the extracted good to the track or the like. is promoted towards.

The invention is primarily based on the object of a to create progressive expansion, which is particularly suitable for use in mining operations of the latter type. Furthermore, the invention aims to improve this last-mentioned mining or extraction process in particular in relation to the removal work and the charging process.

The expansion according to the invention is characterized in that at the bottom connections of the frame between the stamps at least arranged three mutually spaced connection points for the releasable connection of the steering knuckle pieces are.

The expansion according to the invention preferably consists of a three-frame combination, in which the middle frame in each case over

309847/0187

Steering knuckle pieces and a parallel guide and reverse device is connected to the outer frame and in which the sole rails of the frame each consist of two at a distance There are leaf springs arranged one above the other, which are connected to a node at the steering knuckle fastening point are, the sole connections of the outer frame three equally spaced node points for the Have axle-leg connection. The steering knuckle connection can be detachable by means of vertical socket pins or other means Connection means, such as wedges or the like., Take place. To the free ones Ends of the stub axles can be slidable leaf spring connection and between the parallel leaf springs of the sole rails Spacers be arranged in such a way that after loosening the connecting members, the connecting and spacing pieces moved between the parallel spring leaf sleepers of the sole connections to another connection point and here can be connected to the leather leaf sleepers.

It is advisable to have two parallel, one above the other Provide leaf spring steering knuckle pieces, also two Pairs of such steering knuckle pieces on each steering knuckle connection can be arranged.

When expanding this configuration, the frames of the teams can either be in the middle between the one behind the other connect standing stamps, with the frames in the basic position next to each other at the same height, or the frames can be attached to the eccentric connection

309847/0187

make coupling so that the frame in the basic position is offset from one another in the direction of the struts, i.e. in a staggered manner Side by side arrangement. This offers the possibility of arranging the expansion according to the course of the excavation face in such a way that that the necessary slope support is achieved even if the joint is not straight. In particular there is the possibility of building the longwall according to the curved course with which the working in front of the head The mining machine runs from the track into the longwall, pulling it out in a curve into the track, wherein the frame of the team in this strut entrance area are staggered so that they up to the hanging wall Effective work towards the mining impact.

According to a further, in itself independent feature of the invention, a push-forward device is provided on the excavation joint on the mining joint side Dozer blade arranged. The clearing blade preferably extends over the entire width of the three-frame combination j it is arranged on the middle frame so that it can be pushed forward.

With the help of the dozer blade, which acts like a dozer blade the lying surface can be cleaned before the expansion so that the expansion is on an essentially smooth, can be pushed forward to clean lying people. In particular, however, it is possible, with the help of the clearing blades, to remove those from the mining machine to load dissolved coal, if it does not get directly onto the drag conveyor, where-

309847/0107

is improved overall by the charging process. Of the The drag conveyor expediently has a loading device behind the mining machine, which is driven by the Loading arms or the like. can be provided, which feed the coal to the drag conveyor. With the help of the blades can the coal or the like. the loading device so that they or the like of the loading arms. captured and in the Drag conveyor is transported. But it is also possible to use the loading device and / or the drag conveyor To be provided on the offset side with a loading ramp, via which the coal can be transported into the Conveyor is shipped.

To the coal or the like lying before the expansion. as complete as possible To load, it is advisable to design the dozer blade in such a way that it is against the lying surface when it is pushed forward presses. For this purpose, the clearing blade preferably has a shovel-like incline that presses against the lying surface Tongue or the like. on. The tongue or the like. is useful arranged pivotably about a horizontal axis. It is advisable to use the middle frame guides for guide rails connected to the blade or the like. to be arranged, the guide rails expediently consist of upright leaf springs to provide a resilient guide and connection of the To achieve clearing blade with the expansion team.

For the advance of the space shield, it is advisable to use

309847/0187

cylinder provided, which - advantageously above the Fastening points of the guide rails on the dozer blade are hinged. Furthermore, two swivel cylinders can be provided with which the clearing blade is in the horizontal plane can pivot. The dozer blade itself is advantageously designed so that it can be turned into by attachments the height can be increased. Each a further feature of the invention, the clearing blade is designed so that it or his tongue is automatically lifted from the person lying down during the return movement in order to prevent the clearing blade in the return movement coal or the like. takes away.

With the help of the expansion according to the invention, a storage facility can be created in the Kurζstrebverfahren using a before head Dismantle the working extraction machine so that the hanging wall along the entire length of the face right into the distance is at all times is effectively supported. It is recommended that the expansion consisting of the harnesses extend into the route to lead, whereby the extension frame standing in the area of the curved inlet track of the extraction machine is staggered are arranged so that the frame from the interior of the face to the track by a measure. which is several times smaller is than the walking measure, are offset against each other.

The back of the expansion is preferably done so that the frame of the entire expansion series after the preceding mining machine has passed, initially by two successive ones Steps moved with the deposit cap extended

309847/0187

and after passing the returning mining machine be moved by at least one further step, at the latest during the last step backwards the one after passing on the advance machine issued pre-pledging cap]! be reset again. This ensures that the hanging wall is effectively undertaken immediately after the extraction machine has passed in the new extraction field will. As mentioned, a mining machine working before the head is expediently used for mining, the after every extraction run runs back empty into the route and, appropriately, with a drag conveyor that it has pulled behind is provided. The drag conveyor can be loaded at least partially with the aid of the displacers arranged on the extension Plow blades take place.

The invention is explained in more detail below with reference to the drawing explained. In the drawing show:

1 shows a three-frame combination according to the invention in side view;

■ Fig. 2 the expansion team according to FIG. 1 in a view from the mine face;

5 shows the expansion team according to FIGS. 1 and 2 in a plan view of the sole construction

Fig. 4 is a plan view of a Kurzstrebbetrieb in which the expansion according to the invention is used}

Fig. 5 is a plan view of the mining machine working in front of the head with a loading device and a towing

309847/0187

conveyor and the expansion according to the invention in the area of the extraction machine.

The expansion according to the invention consists of a three-frame combination, the frames of which are denoted by I, II and III. The frames are designed the same as one another j 'they each have two hydraulic rams 10 and 11, which, as is known, are connected on the lying floor via a base connection and on the hanging wall via a hanging end cap. The stamp 10 and 11 each stand with their feet on a wide footplate 13- The footplates IJ of in Walking direction R one behind the other punch 10 and 11 of each frame are over two horizontal, parallel Leaf spring sleepers 14 and 15 connected, the Leaf spring sleepers are connected to the end of the footplates by means of bolts 16.

The stamps 10 and 11 of each frame wear a multi-part cap on their heads, the cap parts 17 and are articulated in a joint 19. The joint 19 is assigned a leaf spring device 20 which has a Prevents the joint from buckling in the unloaded state. The cap 18 protrudes far to the working joint, with the cantilevered cap part 18 'is arranged a pre-pledging cap. This consists of an at the bottom of the cap 18 ' arranged sliding cap 21, which "by means of a hydraulic cylinder 22 to the working face (in 'arrow direction R) can be advanced and can be pushed back in the opposite direction. The one below

309847/0187

of the protruding cap part 18 'arranged cylinders 22 is hinged with its piston rod at 23 on the cap. With a joint is referred to, in which the pre-pledging cap is connected to the feed cylinder.

At its end on the fracture side, the cap 17 has an articulated fracture deflector 25. Furthermore, the expansion team here provided with a break protection shield 26, which over hinge pins 27 is hinged to consoles 28 of the two outer frames I and III. The break protection shield 26 is with Side shield plates 29 are provided.

Between the middle frame II and the two outer frames I and III there is a parallel guide and rearward device 30 arranged, which, as is known, consists of two parallel, rod-like guide elements 31 and 32 arranged vertically one above the other (FIG. 2) and one on the side overlying step cylinder 62 consists. The two guide rods are at their ends with each other and with a protective housing 33 (Fig. 3) connected, in which a double sliding piece is located. The protective housing is well known Way provided with a longitudinal slot to the connection between the DoppeIgleitstück and one of the two frames to be able to manufacture.

The crying cylinders 62 with the piston rods 63 are rl ^ er

30S847 / 0187

on the one hand at 65 articulated on the protective housing 33 and on the other hand at 64- on the associated outer stamp of the rear stamp 11 via Eonsolen or the like. hinged.

On the base connections of the frames I, II and III consisting of the spring leaf sleepers 14 and 15, three connection points 35? 36 and 37 provided for the parallel guiding and rearward device connecting stub axle pieces to the adjacent frame. The stub axle connection is made here by means of leaf springs 38, which, as can be seen in FIGS of the two parallel guiding and rear devices 30, while the leaf springs 38 of the outer frames I and III are connected to the double sliding pieces of the rear devices. As S ¹ Ig Instead, however, it is also possible to connect the leaf springs to the front connection points 35 or the rear connection points 37, in which case the frames I, II and III in the walking direction R by the distance between the connection points 35 and 37 from the central connection point 36 are offset from one another in the walking direction

309847/0187

_ 1 O

Sole connections 14, 15 are easily detachable connecting organs intended. For example, the leaf springs 38 are connected at the end with e.g. U-shaped sliding spacers 39, which lie between the parallel spring leaf sleepers 14 and 15 of the sole connections and between these in the walking direction are movable. To connect these sliding spacers 39 with the spring leaf sleepers 14 and 15, vertical socket pins 40 can be used.

The three-frame combination I, II, III has on the working face side a clearing blade 50 which extends over the entire width of the extension combination extends. The clearing blade 50 consists of an approximately vertically standing box-shaped shield part 51, the can be adjusted in height by adding more shield parts. With this shield part 51 is an oblique to Lying inclined shovel-like tongue 52 over joints 53 pivotally connected to the horizontal joint axis. The back of the shield tongue 52 has web-like support members 54 which can be supported on the back of the shield part 51. In the normal state, the shield tongue 52 is against the lying folded, with the support members 54- against the shield part Support 51 from the rear. The entire dozer blade 50 is can be advanced towards the working face and reset in the opposite direction by means of double-acting hydraulic feed cylinders 55. The two parallel feed cylinders 55 are articulated to the shield part 51 at 56 in the upper region. the

309847/0187

Eo Ib en rods 57 of the feed cylinders are offset sed / big via joints 58 with the middle frame II or connected thereto Parts connected * Two parallel guide rails 59 are provided to guide the clearing blade _, which are shown in 1 and 3> are only indicated by dashed lines. the Guide rails 59 consist of upright spring leaves, which is hinged to the shield part 51 at 60 (FIG. 1) are .. The gelenice 60 are at a distance below the joints 56 of the feed cylinder. The guide rails 59 are guided in guide pockets 61 in the walking direction R in accordance with FIG. The guide pockets 61 are on the side next to the middle frame II, i.e. between the middle frame and the parallel guiding and rearward devices 30 arranged.

With the help of the two feed cylinders 55 can thus advance the dozer blade 50 in the direction of arrow R, with the Shield part 51 is tilted slightly in the vertical plane by the feed cylinder and the shield tongue 52 is against the lying presses. The feed cylinders are in opposite directions Direction acted upon by the pressure, the dozer blade is set back again. When retracting the snow blade the lying tongue 52 can pivot up in the direction of arrow P, so that she can freely check any obstacles on the lying surface. On the other hand, when the dozer blade is advanced the lying tongue 52 with the supporting organs 5 ^ on the back

309847/0187

supported on the shield part 51, so that they while maintaining their contact with the lying person that in front of the clearing blade pushes lying goods in front of him.

To raise the clearing blade 50 at a slight angle to the Schreitrichtimg R, i.e. to be able to pivot in the vertical plane, if the double-acting feed cylinder 55 rotates in opposite directions, i.e. one in the direction of extraction and the other in direction of insertion applied.

In Fig. 4 a short strut is shown, in which the inventive construction is used. The ^{longwall is designated with r} / 0 , in aera the coal or the like, extracted from an accompanying route 71 with the help of a mining machine (continuous hirer) working in front of the head. 1 to '';. , the individual teams with AB G etc .; are designated. The expansion is led out into the accompanying route 71, with the expansion units standing in the area of the accompanying route and the strut entrance being denoted by A to E. The working face 72 runs “outside of the short strut in a straight line; at the strut entrance it runs in a curve at 7r

3 0 9 8 4 7 / C 1 8 7 ORIGINAL INSPECTED

into route 71. Not just inside the hanging wall of the longwall. but also in the area of the route and the strut entrance as effectively as possible up to the working face to intercept, the frames of the teams G, D and E are offset from each other in the basic position, like this can be seen in FIG. In addition, the pre-pledging caps 21 of this frame are fully pushed out so that they are approximately up to reach the mining joint 73. Correspondingly, the canopies of teams A and B standing in route 71 are pushed out, However, the frames of these teams are not offset from one another. The staggered arrangement The frame of the sidecars G, D and E can be changed by repositioning the steering knuckle connections 38 on the connecting members 35 to 37, as explained above in connection with FIGS. 1 to 3.

The teams F to Q standing within the short strut are not offset from one another; their frames are accordingly connected via the central connection points 36. In addition, the pre-pledging caps of these teams are inserted, however, the protruding cap parts 18 'extend almost to the working joint 70.

Fig. 4 shows the face and the expansion in the starting position before extraction. The extraction takes place according to FIG. By means of an extraction machine 74- (Gontinuous Miner) working in front of the head, which is equipped with a lifting and lowering, rotating cutting roller 7 ¹ P , which the Ab-

309847/0187

building site 70 in a cutting depth of, for example, 3 m. A drag conveyor 76 is connected to the extraction machine in a known manner, by means of which the coal released by the extraction machine is conveyed to the route 7I. The extraction machine pulls the drag conveyor behind it during the extraction journey, the end of the drag conveyor within the route 71 being discharged onto a route conveyor (not shown). The mining machine 74 begins its mining journey in the route 71> it runs from the route on an arch-like path 77 into the short strut, where it wins the mining impact in the strut entrance area at 73 by the depth of the excavation. Immediately after the mining machine has passed, the expansion spans A to E are advanced in several steps in the route area with the Vorpfändkappen 21 pushed out, so that the hanging wall exposed by the mining machine is immediately underpinned up to the excavation joint 70.

The back of the extension within the longwall can be seen in FIG. As soon as the extraction machine 74 · at a Expansion team, e.g. the expansion team M has driven past, the middle frame II of this team is first by applying pressure to the rear cylinder by the rear cylinder stroke, which is e.g. 1 m, advanced at the same time the Vorpfändkappe 21 of this frame is pushed out. Then the two outer frames I and III are around

309847/018 7

the return cylinder stroke made up, as shown in Fig. 5 "in the Sidecar Ii is shown. At the same time, the Yorpfändkappen this frame I and III advanced. Then the middle frame II is again increased by the return cylinder stroke (Im) advanced, as shown in the E team. Then the outer frames I and III are around the Return cylinder stroke made up. The expansion margins are now in two steps of 1 m each, i.e. by a walking distance of 2 m in total, with the ones being pushed out Vorpfändkappen 21 secure the hanging wall up to about the working face 70. In Fig. 5, the margins G, H and J are around advanced two steps.

In this way, the entire row of expansion teams is immediately behind the extraction machine during the extraction journey initially moved two steps. At the end of the mining run, the mining machine runs in the direction of the arrow S to route 71 back, taking the drag conveyor 76 pushes in front of him and pushes back into the track. As soon as the mining machine has passed the expansion on the way back, the individual teams are moved by a further step of 1 m to the joint 70 kin, at the same time the pre-pledging caps 21 are inserted. The expansion teams are now back in the 3? Ig. position shown in which the protruding cap parts 18 ' the hanging wall up to the immediate vicinity of the working face 70 undertake.

309847/0187

- ίο -

The same workflow is repeated on the next extraction run of the extraction machine 7 ^ It can be seen that by the gradual backing of the teams and the extension the Vorpfändkappen the hanging wall immediately after his Exposing the entire length of the face up to the route 71 will..

The material loosened by the extraction machine is fed to the drag conveyor 76 via an intermediate conveyor 76 'and conveyed away by this to the track. At 78 there is one with The loading device connected to the mining machine refers to the loading device with driven loading elements, here in the form of pivotable ones Loading arms 79 is provided, which feed the residual coal lying before the expansion to the drag conveyor. The immediate Coal remaining on the surface before the expansion can be removed with the aid of the clearing blades 50 arranged on the expansion be fed to the drag conveyor. For this purpose, the dozer blades are pressurized to the feed cylinder advanced, feeding the coal to the loading device 78 so that it can be loaded with the aid of the loading arms 79 in the drag conveyor can be shipped. It is possible to ramp the loading device on the offset side train so that the blades push the coal over the loading ramp into the drag conveyor. To this Almost complete extraction of the coal can be achieved. This can also be done with the help of the clearing blades Clean the lying in front of the individual extension spans so that the extension can be moved to a smooth lying surface.

309847/0187

Claims (18)

Expectations 1. Gradual expansion for mining operations, in particular for short struts in which the extraction takes place with the help of a cutting extraction machine working in front of the head , whereby the removal is provided with pre-pledging caps, there is an expansion frame connected to a team that has its sole connections between the rams Axle leg pieces on a parallel guide and rear device are connected, characterized in that at the base connections (14, 15) of the frame (I, II, III) between the punches (10, 11) at least three mutually spaced connection points (35, 36, 37) for the releasable connection of the axle leg pieces (38) are arranged. 2. Expansion according to claim 1, characterized in that it consists of a three-frame team (I, II, III) in a known manner consists, in which the middle frame (II) each via steering knuckle pieces (38) and a parallel guide and Rear device (30) is connected to the outer frame (I, III) and in which the sole rails of the frame respectively consist of two spaced apart Eeder leaf sleepers (14, 15) which are attached to the steering knuckle attachment point are connected to a node "with the sole connections of the outer frame three equally spaced junction points 309847/0187 (35, ί> 6, 37) for the steering knuckle connection. 3- expansion according to claim 1 or 2, characterized in that that the steering knuckle connection takes place by means of vertical socket pins (40). 4. Expansion according to one of claims 1 to 3, characterized in that that at the free ends of the stub axles (38) between the parallel spring leaf sleepers (14, 15) of the Base rails displaceable leaf spring connecting pieces and spacers (39) are arranged. 5. Expansion according to one of claims 1 to 4, characterized in that that a retractable Eäumschild (50) is arranged on the expansion team on the working joint side. 6. Expansion according to claim 5 · characterized in that the Eäumschild (50) extends over the entire width of the three-frame combination and is attached to the middle frame (II) Is arranged to be advanced. 7- expansion according to claim 5 or 6, characterized in that that the Eäumschild (50) has a tongue which presses against the lying down and is inclined like a shovel to the lying down (52). 8. Expansion according to claim 7 ■> characterized in that the tongue (52) is pivotable about a horizontal axis (53). 9 · Expansion according to one of claims 5 to 8. 309847/018 7 shows that on both sides of the sole connection (14-,
15) of the middle frame (II) guides (61) for with
the clearing blade (50) connected guide rails (59) are arranged. 10. Expansion according to claim 9, characterized in that the
Guide rails (59) consist of leaf springs standing on edge. 11. Expansion according to claim 9 or 10, characterized in that
that above the fastening points of the guide rails (59) on the clearing blade (50) feed cylinders (55) are articulated. 12. Expansion according to one of claims 5 to H? characterized in that by counteracting the feed cylinder (55) the clearing blade (50) in the horizontal plane
is pivotable. IJ. Expansion according to one of Claims 5 to 12, characterized in that that the clearing blade (50) or the tongue (52) can automatically be lifted from the person lying down when it is reset. 14-. Expansion according to one of Claims 5 to 13, characterized in that that the blade (50) can be increased in height by attachments. 15. "Procedure for mining a deposit in a short-walled operation by means of one working in front of one's head, of one - 22 309847/0187 - OO - A cutting mining machine driving into the longwall face on an arc-shaped inlet track using an extension according to one or more of claims 1 to 14, the extension teams, which are expediently designed as three-frame teams and standing next to one another in the longitudinal direction of the face, are provided with pre-pledged caps, which are issued after the mining machine has passed , characterized in that the frames (I, II, III) of the extension spans after the advancing extraction machine (7 ² O has passed) initially moved by two successive steps with the pre-pledging cap (21) pushed out, and after the returning extraction machine has passed by at least one further step are, at the latest during the last step back, the pre-pledging caps (21) issued after the passing machine has been put back again. 16. The method according to claim 15, characterized in that the expansion consisting of the harnesses is extended into the route (71), with the one in the area of the curved Infeed track standing frames are staggered so that from the interior of the face to the track the frame by a measure. which is several times smaller than the walking distance, are offset against each other. 17. The method according to claim 15 or 16, characterized in that that for the dismantling a known per se 309847/018 7 extraction drive empty extraction machine returning to the route is used with a drag conveyor (76). 18. Method for loading a drag conveyor that is pulled by a mining machine working in front of the head, characterized in that the loading of the drag conveyor with the aid of the "mining face" can be advanced, clearing blades associated with the progressive expansion (50) he follows. 0 9 8 4 7/0187 Le e rs e it