Platform inclined conveyor system for mining trucks in surface mining

Abstract

The invention relates to a platform inclined conveyor system for mining trucks in surface mining, the system comprising a platform (8) which can be driven on by lorries and can be moved on a track (6) extending from the edge (2) of the mining funnel at the Earth's surface (4) to the funnel base, wherein a multi-cable drum conveyor machine (10) arranged on the Earth's surface (4) is connected to the platform (8) by means of a plurality of cables (12) which pass, as a cable drive, one or more times over deflection pulleys (14) arranged at stop points at least on the platform (8), and the ends of which cables are attached in the area of the Earth's surface (4).

Description

SIEMAG TECBERG GMBH Fortmann Tegethoff Platform inclined conveyor system for mining trucks in surface mining DESCRIPTION

[0001] The present invention relates to a platform inclined conveyor system for mining trucks in surface mining, as described by the independent claim.

[0002] Open-pit mining is a surface mining technique in which minerals are extracted from an open pit in the ground. It is the most widely used method for mineral extraction worldwide and does not require special extraction methods or the complex construction of a mine working (shaft, blind shaft, borehole) from the surface to an underground point. In open-pit mining operations at the Earth's surface, the overburden above the deposit must first be removed before the deposit itself can be mined. This is typically done using large, heavy-duty trucks specifically designed for open-pit mining.

[0003] To access the deposit and extract the mineral itself, traditional methods employed were to construct so-called stopes, i.e., stepped terraces. The height of the stopes was determined by the soil's strength, the available machinery, and economic considerations. Between the stopes, inclined planes were built to serve as access roads for the dump trucks. This meant that the deeper the deposit was mined, the larger the opening of the resulting mining funnel, widening upwards by approximately 40° to 60°.

[0004] The material to be extracted by drilling or blasting (hard rock, solid ores), as well as the waste rock, is transported from the mining sites to the surface by dump trucks via the access roads built between the mining benches. The increasingly long, winding roads, which became longer as mining progressed, were traversed at approximately 10 km / h uphill and 35 km / h downhill, a process that was extremely inefficient and time-consuming. 28001.20808WO Fortmann Tegethoff SIEMAG TECBERG GMBH

[0005] To solve this problem, conveying systems for dump trucks, such as those described in DE000019963464A1, have been created, which allow the deposit or overburden or waste mountains to be removed or excavated more economically in several respects and which enable safe operation as well as adaptation to the increasing mining depth without major effort.

[0006] According to the prior art, an inclined elevator extending from the edge of the hopper at the earth's surface to the hopper's base is provided. This elevator features a platform accessible to trucks, which is connected via at least one cable to a conveyor machine (Koepe friction principle) located at the earth's surface and encircled by the cable. The inclined elevator's travel path, which descends with the hopper's incline, eliminates the need for a serpentine route. A truck loaded at the hopper's base simply needs to be parked on the lowered platform, equipped with locking devices for the truck's wheels, and is then preferably transported upwards driverless.

[0007] According to this known state of the art, the mobile platform is connected via at least one cable to a hoisting machine (according to the Koepe friction principle) located on the earth's surface and encircled by the cable, wherein the upper and lower runs of the cable each run over a separate pulley and wherein the upper run cable end is attached to the lifting platform / platform and the lower run cable end is attached to a counterweight which always moves in the opposite direction to the movable mobile platform, so that only a part of the sum of payload, truck, mobile platform and cable weight has to be moved by the hoisting machine.

[0008] Over the years, it has become apparent that this solution, despite being a significant improvement over providing serpentine tracks for the dump trucks, is complex, expensive, and inflexible due to the complexity of the device with its counterweight, the mandatory requirement to ensure the frictional grip of the Koepe system, and the corresponding need for a double layer of roadway. Therefore, a solution is needed that eliminates these disadvantages and is easy and efficient to install and operate. 28001.20808WO Fortmann Tegethoff SIEMAG TECBERG GMBH

[0009] This problem is solved by the present invention as described by the independent claim, with advantageous embodiments being described by the dependent claims.

[0010] According to the invention, a platform inclined conveyor system for mining trucks in surface mining is provided, comprising a platform that can be driven on by trucks and is movable on a track extending from the edge of the mining funnel at the earth's surface to the bottom of the funnel, wherein a multi-rope drum conveyor or, if applicable, two conveyors arranged at the earth's surface is electrically or mechanically coupled to the platform via a plurality of ropes, which are reeved once or several times via deflection pulleys arranged at least at anchor points on the platform as a rope drive, and wherein the ends of the ropes are fixed in the area of ​​the earth's surface.

[0011] In a preferred embodiment, the majority of ropes can be guided from the multi-rope drum conveyor to the platform via deflection pulleys arranged at the edge of the mining hopper, with the deflection pulleys preferably being mounted on a substructure. In this case, either the ends of the ropes or the additional deflection pulleys are fixed to the substructure. The multi-rope drum conveyor is positioned at a distance from the edge of the mining hopper and from the substructure, with this distance being variable and adaptable to the local conditions.

[0012] The platform inclined conveyor system for mining trucks in surface mining according to the present invention allows for a significant reduction in the required cable pull compared to the prior art, which necessitates smaller cable diameters, which in turn allow for a smaller minimum drum diameter. The reduced cable pull and smaller drum diameters result in significantly reduced required drive torques, thus considerably improving the efficiency of the inclined conveyor system.

[0013] The conveyor machine, deflection pulleys with substructure, platform with deflection pulleys and a guide system to be provided on the ramp can be very easily designed according to the truck's weight tonnage (dead and payload) and adapted to changing requirements, e.g. by increasing or decreasing its size. 28001.20808WO Fortmann Tegethoff SIEMAG TECBERG GMBH the number of deflection pulleys arranged on the platform at anchor points and on the substructure for the deflection discs, into which the majority of ropes are reeved.

[0014] The track on which the platform moves up and down can be designed modularly to allow for extension of the track as the hopper floor gradually sinks during mining, or to facilitate relocation of the entire system.

[0015] Preferably, the track is designed as a rail track, with the platform having corresponding disc wheels that run in the rails. Alternatively, the track can also be designed as a modular precast concrete track.

[0016] In a preferred embodiment of the invention, the multi-rope drum winding machine can be configured as a double-drum Blair winding machine with mechanically or electrically synchronized drums. In double-drum winding machines, both drums have two winding areas, typically for multi-layer winding, often also referred to as BMR Winder BLAIR Multi-Rope. Since such machines are very wide, it may be necessary to arrange the two drums at an angle to each other to maintain the required rope deflection angles. In this case, each drum has its own drive shaft, which is mechanically coupled via a universal joint. Alternatively, each drum can have its own motor, which generates the highest drum torque, with both drums then being electrically synchronized. The drive(s) (direct drive or via gearbox) can thus be designed in a significantly smaller and more compact size.

[0017] Further properties, features and advantages of the invention will become apparent from the description of an embodiment of the present invention in conjunction with the accompanying drawing, which does not limit the scope of protection; therein shows:

[0018] Fig. 1 shows a spatial view of an embodiment of the platform inclined conveyor system for mining trucks in surface mining;

[0019] Fig. 2 shows a top view of the embodiment of the platform inclined conveyor system for mining trucks in surface mining according to Fig. 1.28001.20808WO Fortmann Tegethoff SIEMAG TECBERG GMBH

[0020] Fig. 1 shows a spatial view of an embodiment of the platform inclined conveyor system for mining trucks in surface mining, wherein in the illustrated embodiment a platform 8, which can be driven on by (not shown) trucks and is movable on a track 6 extending from the edge 2 of the mining hopper at the earth's surface 4 to the bottom of the hopper (not shown), wherein a multi-rope drum conveyor 10 arranged at the earth's surface 4 is connected to the platform 8 via a plurality of ropes 12, which are reeved one or more times via guide rollers 14 arranged at attachment points on the platform 8 as a rope drive, and wherein the ends of the ropes are fixed to the substructure 18 of the deflection pulleys 14 at the earth's surface.

[0021] The multi-rope drum conveyor 10 in the illustrated embodiment is a double-drum Blair conveyor, with electrically coupled and thus synchronized drums, wherein the multi-rope drum conveyor 10 is arranged in the ground 20 over a foundation 22.

[0022] In the embodiment shown in Fig. 1, the majority of the ropes 12 are guided from the multi-rope drum conveyor 10 to the platform 8 via deflection pulleys 16 arranged at the edge 2 of the mining hopper. These pulleys are mounted on a substructure 18, which also carries further deflection rollers 14 for the ropes 12. The multi-rope drum conveyor 10 is positioned at a distance from the edge 2 of the mining hopper and from the substructure 18.

[0023] In the illustrated embodiment, the track 6 is provided with rails 24 in which a suitable number of disc wheels 28, arranged on the platform 8 via corresponding supports 26, run.

[0024] Fig. 2 is a top view of the embodiment of the platform inclined conveyor system for mining trucks in surface mining according to Fig. 1, wherein identical features are provided with identical reference numerals.

Claims

28001.20808WO Fortmann Tegethoff SIEMAG TECBERG GMBH PATENT CLAIMS 1. Platform inclined conveyor system for mining trucks in surface mining, comprising a platform (8) that can be driven on by trucks and is movable on a track (6) extending from the edge (2) of the mining funnel at the earth's surface (4) to the bottom of the funnel, wherein a multi-rope drum conveyor (10) arranged at the earth's surface (4) is connected to the platform (8) via a plurality of ropes (12), which are reeved in one or more places via deflection pulleys (14) arranged at least at attachment points on the platform (8) and whose ends are fixed in the area of ​​the earth's surface (4).

2. Platform inclined conveyor system according to claim 1, wherein the plurality of ropes (12) are guided from the multi-rope drum conveyor (10) to the platform (8) via deflection pulleys (16) arranged at the edge of the mining hopper.

3. Platform inclined conveyor system according to claim 2, wherein the deflection pulleys (16) are arranged on a substructure (18) and the ends of the ropes (12) are fixed to the substructure 18 of the deflection pulleys 14.

4. Platform inclined conveyor system according to one of the preceding claims, wherein the travel path (6) is modularly designed to be extended as the hopper bottom lowers.

5. Platform inclined conveyor system according to claim 4, wherein the travel path (6) is designed as rails (24).

6. Platform inclined conveyor system according to claim 4, wherein the travel path (6) is designed as a modular prefabricated travel path.

7. Platform inclined conveyor system according to one of the preceding claims, wherein the multi-rope drum conveyor (10) is designed as a double-drum Blair conveyor, with mechanically or electrically synchronized drums.

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