Truck double-line lifting and conveying system and method for strip mine large-dip-angle rail mine

Abstract

The invention discloses a strip mine large-dip-angle rail mining truck double-line lifting and conveying system and method, belongs to the field of ore transportation, and aims to transport ore quickly, efficiently and safely. Comprising a left lifting conveying line, a right lifting conveying line and a main driving system. The left lifting conveying line and the right lifting conveying line have the same structure and are symmetrically arranged side by side; the rope outlet position of the left steel wire rope on the left winding drum device and the rope outlet position of the right steel wire rope on the right winding drum device are vertically opposite and arranged up and down, the left winding drum device and the right winding drum device are driven by the main driving system to rotate synchronously, and the steel wire ropes drag the carrying trolley to carry the mining truck to run along the corresponding rails. Through double-line arrangement, the conveying capacity is improved, and energy consumption is only used for lifting ore; by means of the method that the ores take the elevator, it is guaranteed that the ores are transported rapidly, safely and efficiently, the transportation distance is effectively shortened, the ore transportation cost and carbon emission are greatly reduced, and safe, green, high-quality and intelligent development of mines can be achieved.

Description

Technical Field

[0001] This invention belongs to the field of ore transportation technology, specifically a double-track hoisting and conveying system and method for open-pit mine steep-angle track mining trucks. Background Technology

[0002] Currently, the transportation of ore in open-pit mines both domestically and internationally typically employs three modes: mining trucks, belt conveyors, and rail transport, or a combination of these three methods. Each mode has its own characteristics: belt conveyors offer advantages such as continuous transport, large transport capacity, and high efficiency, but also have high operating costs and a high failure rate, and require a small inclination angle (≤15 degrees, generally not exceeding ≤13 degrees); rail transport features large transport capacity and high efficiency, but has higher construction and maintenance costs, and requires a small inclination angle (maximum gradient not exceeding 2.5%, ≤1.5 degrees), and is usually located at the top of the mine, forming a combined transport system with mining trucks or belt conveyors; mining truck transport offers advantages such as high flexibility and adaptability, but also has high costs and poses safety hazards and environmental pollution problems, making it the primary mode of transport in open-pit mines.

[0003] As open-pit mining deepens, belt conveyors and rail transport, limited by their inclination angles, can no longer meet the requirements for conveying at steep inclines. Currently, electric shovels are primarily used for excavation and loading, followed by mining trucks for transport. However, the deeper the open-pit mining, the longer the ore transport distance, the steeper the slope, the longer the ramp, and the greater the climbing height. Mining trucks transporting fully loaded ore from the bottom of the mine along the mine roadway to the crushing station or stockpile at the top of the mine result in a round trip distance far exceeding the economical transport distance. These problems not only lead to low transport efficiency but also cause a significant increase in consumables such as spare parts, fuel, and tires, resulting in substantial cost increases. This severely restricts the green, high-quality, and intelligent development of mines and hinders the widespread application of electric mining trucks in mines. Summary of the Invention

[0004] The purpose of this invention is to address the drawbacks of electric shovel excavation and loading and mining truck transportation methods, and to provide an efficient conveying system for open-pit mines with steeply inclined rails, which can transport ore quickly, efficiently and safely, significantly reduce ore transportation costs and carbon emissions, and achieve green, high-quality and intelligent development of mines.

[0005] The technical solution adopted in this invention is: a double-track hoisting and conveying system for mine trucks with steep inclines in open-pit mines, comprising a basic double-track system, wherein the basic double-track system includes a left hoisting and conveying line, a right hoisting and conveying line, and a main drive system; the left hoisting and conveying lines have the same structure and are arranged side by side and symmetrically about the center line of the entire conveying system; the left hoisting and conveying line includes a left drum device, a left wire rope, a left track beam, a left mine truck overpass, and a left carrying trolley for transporting mine trucks; there are two sets of left track beams, and two sets of left track... The beams are symmetrically erected on both sides of the center line of the left hoisting and conveying line, and each set of left track beams extends upwards at an incline from the bottom to the top of the mine pit; each set of left track beams is equipped with a track; the left transport trolley is movably mounted on the track along the extension direction of the left track beam; the left drum device includes left drum one and left drum two, which are connected in series to form a double drum via a left drum coupling; the spiral grooves on left drum one and left drum two rotate in opposite directions; the left wire rope is set between the left drum device and the left transport trolley.

[0006] The right hoisting conveyor line includes a right drum device, a right wire rope, a right track beam, a right mine car overpass, and a right transport trolley. There are two sets of right track beams, symmetrically erected on both sides of the right hoisting conveyor line, with each set extending upwards at an incline from the bottom to the top of the mine pit. Each set of right track beams is equipped with a track. The right transport trolley is movably mounted on the track along the extension direction of the right track beam. The right drum device includes a first right drum and a second right drum, connected in series via a right drum coupling to form a double drum. The spiral grooves on the first and second right drums rotate in opposite directions. The right wire rope is positioned between the right drum device and the right transport trolley.

[0007] The mining truck overpass is installed at the top of the corresponding track beam, and its upper surface is flush with the step plane at the top of the corresponding track beam. When the transport trolley runs to the limit position at the top of the track, the upper surface of the transport trolley forms a passage with the mining truck overpass and the top step plane. A downward recessed groove is provided on the step plane at the bottom of the corresponding track beam, and the track beam extends into the groove. When the transport trolley runs to the limit position at the bottom of the track, the upper surface of the transport trolley is flush with the bottom step plane.

[0008] The left wire rope exiting the device on the left drum and the right wire rope exiting the device on the right drum are set oppositely, one up and one down. The left and right drums are connected to the main drive system, which drives the left and right drums to rotate synchronously, so that the wire ropes pull the corresponding transport trolleys along the corresponding tracks.

[0009] Furthermore, two sets of left moving pulley blocks are arranged on the left transport trolley; after the left transport trolley is installed on the track, the two sets of left moving pulley blocks are symmetrical to the center line of the left lifting and conveying line; two sets of left balancing pulley blocks are set diagonally above the top of the left track beam, the two sets of left balancing pulley blocks are symmetrical to the center line of the left lifting and conveying line, and a set of left tensioning pulley blocks is set in the middle of the two sets of left balancing pulley blocks; two sets of left redirecting pulley blocks are set between the top of the left track beam and the left drum device, the two sets of left redirecting pulley blocks are symmetrical to the center line of the left lifting and conveying line; one end of the left wire rope is fixed to the left drum, and the other end... One end extends downward along the track after passing the left redirecting pulley block on the left side to the left movable pulley block on the left side of the left transport trolley. After passing the left movable pulley block on the left side, it extends upward along the track to the left balance pulley block on the left side. Then, it passes the left balance pulley block on the left side, the left tensioning pulley block, and the left balance pulley block on the right side in sequence, and extends downward along the track to the left movable pulley block on the right side of the left transport trolley. After passing the left movable pulley block on the right side of the left transport trolley, it extends upward along the track to the left redirecting pulley block on the right side, and then extends downward along the track to the left drum two and is fixed to the left drum two.

[0010] Two sets of right-moving pulley blocks are arranged on the right transport trolley; after the right transport trolley is installed on the track, the two sets of right-moving pulley blocks are symmetrical to the center line of the right lifting and conveying line; two sets of right-balancing pulley blocks are set diagonally above the top of the right track beam, symmetrical to the center line of the right lifting and conveying line, and a right-tensioning pulley block is set between the two sets of right-balancing pulley blocks; two sets of right-directing pulley blocks are set between the top of the right track beam and the right drum device, symmetrical to the center line of the right lifting and conveying line; one end of the right wire rope is fixed to the right drum. The other end extends downward along the track after passing the right redirecting pulley block on the right side to the right moving pulley block on the right side of the right transport trolley. After passing the right moving pulley block on the right side, it extends upward along the track to the right balance pulley block on the right side. After passing the right balance pulley block, the right tension pulley block, and the right balance pulley block on the left side in sequence, it extends downward along the track to the right moving pulley block on the left side of the right transport trolley. After passing the right moving pulley block on the left side of the right transport trolley, it extends upward to the right redirecting pulley block on the left side, and after passing the right redirecting pulley block on the left side, it extends to the right drum two and is fixed to the right drum two.

[0011] Furthermore, a left disc brake is installed at the end of the left drum one; a left disc brake is installed at the end of the left drum two; a right disc brake is installed at the end of the right drum one; and a right disc brake is installed at the end of the right drum two.

[0012] Furthermore, the steps formed by mining include a step plane and a step slope connecting two adjacent step planes; the left track beam is erected on the step plane of the steps formed by mining via a left support device; the right track beam is erected on the step plane of the steps formed by mining via a right support device.

[0013] Furthermore, both the left and right support devices are positioned close to the outer side of the step plane.

[0014] Furthermore, the main drive system includes a main motor, a left transmission system, and a right transmission system; the left transmission system includes a left normally closed clutch, a left connecting shaft one, a left coupling one, a left main reducer, and a left coupling two; the right end of the left normally closed clutch is connected to the left output shaft of the main motor, and its left end is connected to the left connecting shaft one, both being in a closed state under normal operating conditions to ensure the safety of the entire system; the left end of the left coupling one is provided with a brake wheel and connected to the right input shaft of the left main reducer, and its right end is connected to the left connecting shaft one; the right end of the left coupling two is provided with a brake wheel and connected to the left input shaft of the left main reducer, and its left end is connected to the left connecting shaft two; a left block brake one is provided on the left coupling one, and a left block brake two is provided on the left coupling two.

[0015] The right transmission system includes a right normally closed clutch, a right connecting shaft one, a right coupling one, a right main reducer, and a right coupling two. The left end of the right normally closed clutch is connected to the right output shaft of the main motor, and its right end is connected to the right connecting shaft one. Under normal operating conditions, both are in a closed state to ensure the safety of the entire system. The right end of the right coupling one is equipped with a brake wheel and is connected to the input shaft on the left side of the right main reducer, while its left end is connected to the right connecting shaft one. The left end of the right coupling two is equipped with a brake wheel and is connected to the input shaft on the right side of the right main reducer, while its right end is connected to the right connecting shaft two. The right coupling one is equipped with a right block brake one, and the right coupling two is equipped with a right block brake two.

[0016] Furthermore, the left drum assembly is connected to the output shaft of the left main reducer via a left drum assembly coupling; the right drum assembly is connected to the output shaft of the right main reducer via a right drum assembly coupling.

[0017] Furthermore, a left slow-speed drive system and a right slow-speed drive system are also provided. The left slow-speed drive system includes a left connecting shaft two, a left slow-speed reducer, and a left slow-speed motor; the left slow-speed motor and the input shaft of the left slow-speed reducer are connected in three phases via a left coupling; the output shaft of the left slow-speed reducer is connected to the left end of the left normally open clutch, which is in a disengaged state under normal operating conditions; the left end of the left connecting shaft two is connected to the right end of the left normally open clutch, and its right end is connected to the left end of the left coupling two on the left side of the left main reducer.

[0018] The right slow drive system includes a second right connecting shaft, a right slow reducer, and a right slow motor. The right slow motor and the input shaft of the right slow reducer are connected in three phases via a right coupling. The output shaft of the right slow reducer is connected to the right end of the right normally open clutch, which is in a disengaged state under normal operating conditions. The right end of the second right connecting shaft is connected to the left end of the right normally open clutch, and its left end is connected to the right end of the second right coupling on the right side of the right main reducer.

[0019] Furthermore, an open gear pair is provided between the left drum device and the left main reducer, and between the right drum device and the right main reducer; the open gear pair consists of a pinion and a gear; the pinion is installed on the output shaft of the left main reducer and the right main reducer, and the gear is installed on the end face of the left drum and the right drum.

[0020] Furthermore, the series hoisting and conveying system is composed of multiple sets of the aforementioned basic double-line systems arranged in a staggered and connected manner along the inclined direction of the mine bench; adjacent sets of basic double-line systems in the series hoisting and conveying system are transferred on the same level bench plane; at the bench plane of the transfer point, a turntable is respectively set on the side of the left and right hoisting and conveying lines of each set of basic double-line systems near the inclined surface of the upper bench; the top surface of the turntable is flush with the bench plane, and is used for the turning and transfer of mining trucks between adjacent basic double-line systems.

[0021] Furthermore, the system is a series-parallel hoisting and conveying system, consisting of multiple sets of the series hoisting and conveying systems arranged side by side along the plane of the mine bench.

[0022] Furthermore, the parallel hoisting and conveying system is composed of multiple sets of the aforementioned basic double-line systems arranged side by side along the plane of the mine benches.

[0023] The conveying method using a double-track hoisting and conveying system for mine trucks with steeply inclined tracks in open-pit mines includes the following steps:

[0024] First, fully loaded mining trucks drive into the left hoisting conveyor line at the left transport trolley located at the bottom of the mine; empty returning mining trucks drive into the right hoisting conveyor line at the right transport trolley located at the top of the mine.

[0025] Next, the main motor starts rotating in the forward direction, the left hoisting conveyor line lifts the left carrying trolley and the fully loaded mining truck to the top of the mine, and at the same time the right hoisting conveyor line lowers the right carrying trolley and the empty returning mining truck to the bottom of the mine;

[0026] Then, the fully loaded mining trucks arrive at the top of the mine and drive out of the left transport trolley, while the empty returning mining trucks arrive at the bottom of the mine and drive out of the right transport trolley.

[0027] Next, the next fully loaded mining truck drives into the right hoisting conveyor line on the right transport trolley located at the bottom of the mine, while the next empty returning mining truck drives into the left hoisting conveyor line on the left transport trolley located at the top of the mine.

[0028] Finally, the main motor starts and reverses, the left hoisting conveyor line lowers the left carrying trolley and the empty returning mining truck, while the right hoisting conveyor line raises the right carrying trolley and the fully loaded mining truck.

[0029] The beneficial effects of this invention are as follows: This invention uses a drum device to rotate and wind up a steel wire rope to pull a trolley carrying a mining truck along a track erected from the mine pit to the mine roof to transport ore. This solves the problems of long transportation distances, high slopes, low transportation efficiency, poor economics, and the exponential increase in consumables such as spare parts, fuel, and tires in open-pit and deep-pit mines, which significantly increases costs and causes serious environmental pollution. At the same time, it solves the problem that electric mining trucks cause great damage to batteries when climbing slopes, which is not conducive to the promotion and construction of green mines.

[0030] By using a dual-line system with left and right lifting conveyor lines, the conveying capacity is doubled compared to a single line. Furthermore, the weight of the trolleys carrying empty mining trucks on both lines balances the weight of the trolleys carrying fully loaded mining trucks. The motor output power is only required for lifting the ore, significantly reducing lifting and conveying costs. Moreover, there is no need for ore transfer between the trolleys and mining trucks, further saving time. The trolleys' structure is simplified as they only serve to carry the mining trucks. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the open-pit mine steep-angle track hoisting and conveying system disclosed in this invention.

[0032] Figure 2 for Figure 1 A magnified view of part A.

[0033] Figure 3 A partially enlarged view of an open gear pair installed at the coupling between the main drive system and the drum assembly.

[0034] Figure 4 This is a schematic diagram of the three basic double-line systems connected in series.

[0035] Figure 5 This is a schematic diagram of three basic dual-line systems arranged in parallel.

[0036] Figure 6 This is a schematic diagram showing the series and parallel arrangement of 9 basic dual-line systems.

[0037] Figure 7 for Figure 4 A cross-sectional view of the rotary table.

[0038] In the diagram, 1-left hoisting conveyor line, 11-left drum device, 111-left drum one, 112-left disc brake one, 113-left drum coupling, 114-left drum two, 115-left disc brake two, 12-left wire rope, 13-left redirecting pulley block, 14-left balance pulley block, 15-left mine car overpass, 16-left moving pulley block, 17-left transport trolley, 18-left track beam, 19-left support device, 20-left tensioning pulley block, 2-right hoisting conveyor line, 21-right drum device, 211-right drum one, 212-right disc brake one, 213-right drum coupling 214-Right Drum II, 215-Right Disc Brake II, 22-Right Wire Rope, 23-Right Redirecting Pulley Block, 24-Right Balance Pulley Block, 25-Right Mine Truck Overpass, 26-Right Moving Pulley Block, 27-Right Carrying Trolley, 28-Right Track Beam, 29-Right Support Device, 30-Right Tensioning Pulley Block, 3-Main Drive System, 31-Main Motor, 32-Left Transmission System, 321-Left Normally Closed Clutch, 322-Left Connecting Shaft I, 323-Left Coupling I, 325-Left Main Reducer, 326-Left Coupling II, 33-Right Transmission System, 331-Right Normally Closed Clutch, 332-Right Connecting Shaft Shaft 1, 333-Right Coupling 1, 335-Right Main Reducer, 336-Right Coupling 2, 4-Left Slow Speed ​​Drive System, 41-Left Connecting Shaft 2, 42-Left Normally Open Clutch, 43-Left Slow Speed ​​Reducer, 44-Left Coupling 3, 45-Left Slow Speed ​​Motor, 5-Right Slow Speed ​​Drive System, 51-Right Connecting Shaft 2, 52-Right Normally Open Clutch, 53-Right Slow Speed ​​Reducer, 54-Right Coupling 3, 55-Right Slow Speed ​​Motor, 6-Left Drum Assembly Coupling, 7-Right Drum Assembly Coupling, 8-Open Gear Pair, 81-Pin Gear, 82-Large Gear, 9-Step, 91-Step Plane, 9 2-Step inclined surface, 10-Mining truck, 100-Series hoisting and conveying system, 1001-Bottom hoisting and conveying unit, 1002-Middle section hoisting and conveying unit, 1003-Top hoisting and conveying unit, 1004-Turntable, 110-Parallel hoisting and conveying system, 1101-Left side hoisting and conveying unit one, 1102-Middle side hoisting and conveying unit one, 1103-Right side hoisting and conveying unit one, 120-Series and parallel hoisting and conveying system, 1201-Left side hoisting and conveying unit two, 1202-Middle side hoisting and conveying unit two, 1203-Right side hoisting and conveying unit two, 200-Basic double-line system. Detailed Implementation

[0039] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0040] The present invention discloses a double-track hoisting and conveying system for open-pit mine trucks with steep inclines, comprising a basic double-track system 200, wherein the basic double-track system 200 is as follows: Figure 1 and Figure 2 As shown, it includes a left lifting conveyor line 1, a right lifting conveyor line 2, and a main drive system 3.

[0041] The left hoisting conveyor line 1 includes a left drum device 11, a left wire rope 12, a left track beam 18, a left mine truck overpass 15, and a left transport trolley 17 for transporting mine trucks 10. There are two sets of left track beams 18, symmetrically mounted on both sides of the centerline of the left hoisting conveyor line 1, with each set extending upwards at an incline from the bottom to the top of the mine pit. Each set of left track beams 18 is equipped with a track. The left transport trolley 17 is movably mounted on the track along the extension direction of the left track beam 18. The left drum device 11 includes a first left drum 111 and a second left drum 114, connected in series via a left drum coupling 113 to form a double drum. The spiral grooves on the first left drum 111 and the second left drum 114 rotate in opposite directions. A left disc brake 112 is installed at the end of the left drum 111. The brake disc of the left disc brake 112 is directly installed at the end of the left drum 111 and matches with the brake pads of the left disc brake 112 to form the safety braking system of the left drum 111. A left disc brake 115 is installed at the end of the left drum 114. The brake disc of the left disc brake 115 is directly installed at the end of the left drum 114 and matches with the brake pads of the left disc brake 115 to form the safety braking system of the left drum 114.

[0042] The left wire rope 12 is positioned between the left drum device 11 and the left transport trolley 17. The left drum device 11 is connected to the main drive system 3 via the left drum device coupling 6. The main drive system 3 drives the left drum device 11 to rotate, pulling the left wire rope 12, thereby causing the left transport trolley 17 to move along the track on the left track beam 18. Specifically: two sets of left moving pulley groups 16 are arranged on both sides of the left transport trolley 17; after the left transport trolley 17 is installed on the track, the two sets of left moving pulley groups 16 are symmetrical about the center line of the left lifting and conveying line 1; two sets of left balancing pulley groups 14 are set diagonally above the top of the left track beam 18, and the two sets of left balancing pulley groups 14 are symmetrical about the center line of the left lifting and conveying line 1; two sets of left redirecting pulley groups 13 are set between the top of the left track beam 18 and the left drum device 11, and the two sets of left redirecting pulley groups 13 are symmetrical about the center line of the left lifting and conveying line 1.

[0043] Furthermore, a left tensioning pulley group 20 can be installed between the two left balance pulley groups 14. One end of the left wire rope 12 is fixed to the left drum 111, and the other end passes through the left redirecting pulley block 13 on the left side and extends downward along the track direction to the left moving pulley block 16 on the left side of the left transport trolley 17. After passing through the left moving pulley block 16 on the left side of the left transport trolley 17, it extends upward along the track direction to the left balance pulley block 14 on the left side. Then, it passes through the left balance pulley block 14 on the left side, the left tensioning pulley block 20, and the left balance pulley block 14 on the right side in sequence and extends downward along the track direction to the left moving pulley block 16 on the right side of the left transport trolley 17. After passing through the left moving pulley block 16 on the right side of the left transport trolley 17, it extends upward along the track direction to the left redirecting pulley block 13 on the right side, and after passing through the left redirecting pulley block 13 on the right side, it extends to the left drum 2 114 and is fixed to the left drum 2 114, thus forming a left winding system for the wire rope. It should be noted that if one end of the left wire rope 12 is fixed to the left end of the left drum 111, then the other end is fixed to the right end of the left drum 2 114; if one end of the left wire rope 12 is fixed to the right end of the left drum 111, then the other end is fixed to the left end of the left drum 2 114; and if one end of the left wire rope 12 is led out from the top of the left drum 111, then the other end is led out from the top of the left drum 2 114; if one end of the left wire rope 12 is led out from the bottom of the left drum 111, then the other end is led out from the bottom of the left drum 2 114.

[0044] During mining operations, multiple steps 9 are formed from the mine floor to the mine roof. Each step 9 includes a step plane 91 and a step ramp 92 connecting adjacent step planes 91. The left mine truck bridge 15 is installed at the top of the left track beam 18, and its upper surface is flush with the step plane 91 of the mine roof. When the left transport trolley 17 reaches the limit position at the top of the track, a passage is formed by the left mine truck bridge 15, the upper surface of the left transport trolley 17, and the step plane 91 of the mine roof. After the left transport trolley 17 carries a fully loaded mining truck 10 to the limit position at the top of the track, the mining truck 10 can drive onto the step plane 91 of the mine roof from the left mine truck bridge 15.

[0045] A recessed groove is provided on the step plane 91 at the bottom of the mine. The left track beam 18 extends into the groove. When the left transport trolley 17 runs to the limit position at the bottom of the track, the upper surface of the left transport trolley 17 is flush with the step plane 91 at the bottom of the mine. At this time, the fully loaded mining truck 10 can drive into the left transport trolley 17 from the step plane 91 at the bottom of the mine, and then be lifted to the top of the mine along the track with the left transport trolley 17.

[0046] The steps 9 formed by mining include step planes 91 and step ramps 92 connecting adjacent step planes 91. The left support device 19 is installed on the step planes 91 of each step 9 formed by mining and close to the step ramps 92 of the same level step. It is located below the left track beam 18 and connected to the left track beam 18, and is used to fix and support the left track beam 18 and transfer the load.

[0047] The left transport trolley 17 is equipped with wheels that match the track of the left track beam 18. Under the traction of the left wire rope 12, the left transport trolley 17 runs along the track on the left track beam 18, realizing the lifting and lowering of the left transport trolley 17, thereby realizing the lifting and lowering of the ore.

[0048] The right lifting conveyor line 2 adopts the same structure as the left lifting conveyor line 1, and the right lifting conveyor line 2 is parallel to the left lifting conveyor line 1 and symmetrical about the center line of the entire conveying system.

[0049] Specifically, the right lifting conveyor line 2 includes a right drum device 21, a right wire rope 22, a right track beam 28, and a right transport trolley 27. There are two sets of right track beams 28, symmetrically mounted on either side of the center of the corresponding right lifting conveyor line 2, with each set extending upwards at an angle from the bottom to the top of the mine pit. Each set of right track beams 28 is equipped with a track. The right transport trolley 27 is movably mounted on the track along the extension direction of the right track beam 28. The right drum device 21 includes a first right drum 211 and a second right drum 214, connected in series via a right drum coupling 213 to form a double drum. The spiral grooves on the first right drum 211 and the second right drum 214 rotate in opposite directions. A right disc brake 212 is installed at the end of the right drum 211. The brake disc and brake pads of the right disc brake 212 are matched to form the safety braking system of the right drum 211. A right disc brake 215 is installed at the end of the right drum 214. The brake disc and brake pads of the right disc brake 215 are matched to form the safety braking system of the right drum 214.

[0050] The right wire rope 22 is positioned between the right drum device 21 and the right transport trolley 27. The right drum device 21 is connected to the main drive system 3 via the right drum device coupling 7. The main drive system 3 drives the right drum device 21 to rotate, pulling the right wire rope 22 and thus driving the right transport trolley 27 to move along the track on the right track beam 28. Specifically: two sets of right moving pulley blocks 26 are arranged on both sides of the right transport trolley 27; after the right transport trolley 27 is installed on the track, the two sets of right moving pulley blocks 26 are symmetrical about the center line of the right lifting and conveying line 2; two sets of right balancing pulley blocks 24 are set diagonally above the top of the right track beam 28, and the two sets of right balancing pulley blocks 24 are symmetrical about the center line of the right lifting and conveying line 2; two sets of right redirecting pulley blocks 23 are set between the top of the right track beam 28 and the right drum device 21, and the two sets of right redirecting pulley blocks 23 are symmetrical about the center line of the right lifting and conveying line 2.

[0051] Furthermore, a right tensioning pulley group 30 is set between the two sets of right balance pulley groups 24. One end of the right wire rope 22 is fixed to the right drum 211, and the other end passes through the right redirecting pulley group 23 on the right side and extends downward along the track direction to the right moving pulley group 26 on the right side of the right transport trolley 27. After passing through the right moving pulley group 26 on the right side, it extends upward along the track direction to the right balance pulley group 24 on the right side. It then passes through the right balance pulley group 24 on the right side, the right tensioning pulley group 30, and the right balance pulley group 24 on the left side in sequence and extends downward along the track direction to the right moving pulley group 26 on the left side of the right transport trolley 27. After passing through the right moving pulley group 26 on the left side, it extends upward to the right redirecting pulley group 23 on the left side and then passes through the right redirecting pulley group 23 on the left side and extends to the right drum 214 and is fixed thereto, forming a wire rope winding system. It should be noted that if one end of the right wire rope 22 is fixed to the left end of the right drum 211, then the other end is fixed to the right end of the right drum 214; if one end of the right wire rope 22 is fixed to the right end of the right drum 211, then the other end is fixed to the left end of the right drum 214; and if one end of the right wire rope 22 is led out from the top of the right drum 211, then the other end is led out from the top of the right drum 214; if one end of the right wire rope 22 is led out from the bottom of the right drum 211, then the other end is led out from the bottom of the right drum 214.

[0052] The right mine truck overpass 25 is installed at the top of the right track beam 28, and its upper surface is flush with the step plane 91 of the mine roof. When the right transport trolley 27 reaches the limit position at the top of the track, the right mine truck overpass 25, the upper surface of the right transport trolley 27, and the step plane 91 of the mine roof form a passageway. After the right transport trolley 27 has transported a fully loaded mine truck 10 to the limit position at the top of the track, the mine truck 10 can drive from the right mine truck overpass 25 into the step plane 91 of the mine roof.

[0053] A recessed groove is provided on the step plane 91 at the bottom of the mine. The right track beam 28 extends into the groove. When the right transport trolley 27 runs to the limit position at the bottom of the track, the upper surface of the right transport trolley 27 is flush with the step plane 91 at the bottom of the mine. At this time, the fully loaded mining truck 10 can drive into the right transport trolley 27 from the step plane 91 at the bottom of the mine, and then be lifted to the top of the mine along the track with the right transport trolley 27.

[0054] The right support device 29 is installed on the step plane 91 of each step 9 formed by mining and close to the step slope 92 of the same level step. It is located below the right track beam 28 and connected to the right track beam 28. It is used to fix and support the right track beam 28 and transmit the load.

[0055] The right transport trolley 27 is equipped with wheels that match the track of the right track beam 28. Under the traction of the right wire rope 22, the right transport trolley 27 runs along the track on the right track beam 28, realizing the lifting and lowering of the right transport trolley 27, thereby realizing the lifting and lowering of the ore.

[0056] The exit positions of the left wire rope 12 on the left drum device 11 and the right wire rope 22 on the right drum device 21 are reversed, one above the other. That is, when the left wire rope 12 is led out from below the two drums of the left drum device 11, the right wire rope 22 is led out from above the two drums of the right drum device 21; when the left wire rope 12 is led out from above the two drums of the left drum device 11, the right wire rope 22 is led out from below the two drums of the right drum device 21.

[0057] The left drum device 11 and the right drum device 21 are connected to the main drive system 3. The main drive system 3 drives the left drum device 11 and the right drum device 21 to rotate synchronously. Thus, the left lifting conveyor line 1, the right lifting conveyor line 2 and the main drive system 3 form two lifting conveyor lines.

[0058] Because the left wire rope 12 of the left hoisting conveyor line 1 and the right wire rope 22 of the right hoisting conveyor line 2 are positioned one above the other on the corresponding drum device, the left carrying trolley 17 and the right carrying trolley 27 run in opposite directions. That is, when the left hoisting conveyor line 1 lifts, the right hoisting conveyor line 2 lowers, and vice versa. When a fully loaded mining truck 10 enters the left carrying trolley 17 located at the bottom of the mine on the left hoisting conveyor line 1, an empty returning mining truck 10 enters the right carrying trolley 27 located at the top of the mine on the right hoisting conveyor line 2. The main motor 31 starts rotating forward, and the left hoisting conveyor line 1 lifts the left carrying trolley 17 and the fully loaded mining truck 10, while the right hoisting conveyor line 2 lowers the right carrying trolley 27 and the empty returning mining truck 10. When the fully loaded mining truck 10 reaches the top of the mine and exits the left transport trolley 17, and the empty returning mining truck 10 reaches the bottom of the mine and exits the right transport trolley 27, the next fully loaded mining truck 10 drives onto the right transport trolley 27 located at the bottom of the mine on the right hoisting conveyor line 2. At the same time, the next empty returning mining truck 10 drives onto the left transport trolley 17 located at the top of the mine on the left hoisting conveyor line 1. Then the main motor 31 starts and reverses. The left hoisting conveyor line 1 lowers the left transport trolley 17 and the empty returning mining truck 10, while the right hoisting conveyor line 2 raises the right transport trolley 27 and the fully loaded mining truck 10. In this way, one fully loaded mining truck 10 is raised while one empty returning mining truck 10 is lowered. Each cycle will raise two truckloads of ore. Compared to the single-line conveying method, not only is the lifting efficiency doubled, but when the left lifting conveyor line 1 lifts the left transport trolley 17 and the mining truck 10, the weight of the right transport trolley 27 and the mining truck 10 on the right lifting conveyor line 2 becomes its counterweight, balancing the weight of the left transport trolley 17 and the mining truck 10 on the left lifting conveyor line 1. This ensures that the actual output power of the main motor 31 of the main drive system 3 is only the power required for lifting the ore, greatly reducing the cost of ore lifting and conveying. Furthermore, the transport trolley directly carries the mining truck 10, eliminating the need for ore transfer between the transport trolley and the mining truck, saving ore transfer time. The transport trolley only serves to carry the mining truck 10, employing methods such as... Figure 1 The triangular platform shown can be used, and its structure can be simplified. The transport trolley described in this specification is a collective term for the left transport trolley 17 and the right transport trolley 27.

[0059] The main drive system 3 includes a main motor 31, a left transmission system 32, and a right transmission system 33.

[0060] The left transmission system 32 includes a left normally closed clutch 321, a left connecting shaft 322, a left coupling 323, a left main reducer 325, and a left coupling 326. The right end of the left normally closed clutch 321 is connected to the left output shaft of the main motor 31, and its left end is connected to the left connecting shaft 322. Under normal operating conditions, both are in a closed state to ensure the safety of the entire system. The left end of the left coupling 323 is connected to the right input shaft of the left main reducer 325, and its right end is connected to the left connecting shaft 322. The right end of the left coupling 326 is connected to the left input shaft of the left main reducer 325, and its left end is connected to the left connecting shaft 321. A left block brake is installed on the left coupling 323. Specifically, the brake wheel of the left block brake is mounted on the left coupling 323, and the brake blocks of the left block brake are matched and installed with the brake wheel. Left coupling 2 326 is equipped with left block brake 2. Specifically, the brake wheel of left block brake 2 is mounted on left coupling 2 326, and the brake blocks of left block brake 2 are matched and installed with the brake wheel. This forms a dual working braking system for left transmission system 32. The redundant braking design ensures the safe operation of the entire transmission system.

[0061] The right transmission system 33 adopts the same structure as the left transmission system 32, and the right transmission system 33 and the left transmission system 32 are symmetrical about the centerline of the entire conveying system. The right transmission system 33 includes a right normally closed clutch 331, a right connecting shaft 332, a right coupling 333, a right main reducer 335, and a right coupling 336. The left end of the right normally closed clutch 331 is connected to the right output shaft of the main motor 31, and its right end is connected to the right connecting shaft 332. Under normal operating conditions, both are in a closed state to ensure the safety of the entire system. The right end of the right coupling 333 is connected to the left input shaft of the right main reducer 335, and its left end is connected to the right connecting shaft 332. The left end of the right coupling 336 is connected to the right input shaft of the right main reducer 335, and its right end is connected to the right connecting shaft 331. A right-side block brake is installed on right coupling 333. Specifically, the brake wheel of right-side block brake 333 is mounted on right coupling 333, and the brake pads of right-side block brake 336 are matched with the brake wheel. A right-side block brake 336 is installed on right coupling 336. Specifically, the brake wheel of right-side block brake 336 is mounted on right coupling 336, and the brake pads of right-side block brake 336 are matched with the brake wheel. This forms a dual-operating braking system for the left transmission system 32. The redundant braking design ensures the safe operation of the entire transmission system.

[0062] The left output shaft of the main motor 31 is connected to the left transmission system 32 via a left normally closed clutch 321, and its right output shaft is connected to the right transmission system 33 via a right normally closed clutch 331. The left drum device 11 is connected to the output shaft of the left main reducer 325 via a left drum device coupling 6. The right drum device 21 is connected to the output shaft of the right main reducer 335 via a right drum device coupling 7.

[0063] Thus, a single main motor 31 can drive both the left lifting conveyor line 1 and the right lifting conveyor line 2 to operate simultaneously. Furthermore, at the coupling 6 between the left transmission system 32 of the main drive system 3 and the left drum device of the left lifting conveyor line 1, and at the coupling 7 between the right transmission system 33 and the right drum device of the right lifting conveyor line 2, when the transmission ratio cannot meet the lifting and lowering speed requirements, a set of open gear pairs 8 can be installed to replace the coupling 6 of the left drum device and the coupling 7 of the right drum device. Figure 3 As shown. The open gear pair 8 is composed of the pinion 81 and the gear 82; the open gear pairs 8 of the left lifting conveyor line 1 and the right lifting conveyor line 2 are symmetrically arranged. The pinion 81 is installed on the output shaft of the left main reducer 325 and the right main reducer 335, and the gear 82 is installed on the end face of the left drum 114 and the right drum 214.

[0064] To facilitate system debugging and maintenance, a left slow-speed drive system 4 and a right slow-speed drive system 5 are also provided. The left slow-speed drive system 4 includes a left connecting shaft 41, a left slow-speed reducer 43, and a left slow-speed motor 45. The left slow-speed motor 45 is connected to the input shaft of the left slow-speed reducer 43 via a left coupling 44. The output shaft of the left slow-speed reducer 43 is connected to the left end of a left normally open clutch 42, which is normally disengaged. The left end of the left connecting shaft 41 is connected to the right end of the left normally open clutch 42, and its right end is connected to the left end of the left coupling 326 on the left side of the left main reducer 325. This left slow-speed drive system 4 is used to achieve slow-speed drive of the left lifting conveyor line 1.

[0065] Similarly, the right slow drive system 5 includes a second right connecting shaft 51, a right slow reducer 53, and a right slow motor 55; the right slow motor 55 is connected to the input shaft of the right slow reducer 53 via a third right coupling 54; the output shaft of the right slow reducer 53 is connected to the right end of the right normally open clutch 52, which is in a disengaged state under normal operating conditions; the right end of the second right connecting shaft 51 is connected to the left end of the right normally open clutch 52, and its left end is connected to the right end of the second right coupling 336 on the right side of the right main reducer 335. This right slow drive system 5 is used to realize the slow drive of the right lifting conveyor line 2.

[0066] When the system is first installed at the user's site and requires debugging, the safety braking system consisting of the left disc brake 112 and the left disc brake 115 of the left lifting conveyor line 1 enters the safety braking state, disengaging the left normally closed clutch 321 of the main drive system 3 and engaging the left normally open clutch 42 of the left slow drive system 4. In this way, the left lifting conveyor line 1 is in a slow drive state under the drive of the main drive system 3 and the left slow drive system 4, and the left lifting conveyor line 1 can be debugged separately. Similarly, the safety braking system consisting of the right disc brake 212 and the right disc brake 215 of the right lifting conveyor line 2 enters the safety braking state, disengaging the right normally closed clutch 331 of the main drive system 3 and engaging the right normally open clutch 52 of the right slow drive system 5. In this way, the right lifting conveyor line 2 is in a slow drive state under the drive of the main drive system 3 and the right slow drive system 5, and the right lifting conveyor line 2 can be debugged separately. After the aforementioned debugging is completed, the operational debugging can begin. First, the operational debugging of the left lifting conveyor line 1 is performed. The left normally open clutch 42 of the left slow drive system 4 is in the normally open state, and the right normally closed clutch 331 of the main drive system 3 is disengaged. Thus, the main motor 31, the left transmission system 32, the left drum coupling 6, and the left lifting conveyor line 1 form lifting conveyor line 1, which can then be tested under no-load and load conditions. Next, the operational debugging of the right lifting conveyor line 2 is performed in the same manner. The right normally open clutch 52 of the right slow drive system 5 is in the normally open state, and the left normally closed clutch 321 of the main drive system 3 is disengaged. Thus, the main motor 31, the right transmission system 33, the right drum coupling 7, and the right lifting conveyor line 2 form lifting conveyor line 2, which can then be tested under no-load and load conditions. Finally, the entire system is debugged and tested. The left normally closed clutch 321 and the right normally closed clutch 331 of the main drive system 3 are placed in the normally closed working state. The left lifting conveyor line 1, the right lifting conveyor line 2 and the main drive system 3 form a working lifting conveyor system, so as to realize the overall debugging, no-load and load test of the entire system.

[0067] When the lifting and conveying system of the left lifting conveyor line 1 malfunctions or requires maintenance, the safety braking system consisting of the left disc brake 112 and the left disc brake 115 of the left lifting conveyor line 1 enters a safety braking state, disengaging the left normally closed clutch 321 of the main drive system 3 and engaging the left normally open clutch 42 of the left slow drive system 4. In this way, the left lifting conveyor line 1, the main drive system 3, and the left slow drive system 4 are in a slow maintenance and repair state, allowing for maintenance and repair. Maintenance and repair of the left lifting conveyor line 1 does not affect the right lifting conveyor line 2, which can continue to operate normally, but can only lift or lower one mining truck 10, reducing lifting efficiency by half. Similarly, when the lifting and conveying system of the right lifting conveyor line 2 malfunctions or has problems requiring maintenance and repair, the safety braking system composed of the right disc brake 1 212 and the right disc brake 215 of the right lifting conveyor line 2 enters the safety braking state, disengaging the right normally closed clutch 331 of the main drive system 3 and engaging the right normally open clutch 52 of the right slow drive system 5. In this way, the right lifting conveyor line 2, the main drive system 3, and the right slow drive system 5 are in a slow maintenance and repair state, and can be maintained and repaired. When the right lifting conveyor line 2 is maintained and repaired, it does not affect the left lifting conveyor line 1. The left lifting conveyor line 1 can work normally, but it can only lift or lower one mining truck 10, reducing the lifting efficiency by half.

[0068] In the left lifting conveyor line 1, a wire rope winding system consisting of a left wire rope 12, a left redirecting pulley block 13, a left balancing pulley block 14, and a left moving pulley block 16 is installed on the wire rope winding system. In the right lifting conveyor line 2, a wire rope breakage real-time monitoring and early warning protection system consisting of a right wire rope 22, a right redirecting pulley block 23, a right balancing pulley block 24, and a right moving pulley block 26 is installed on the wire rope winding system. This system enables real-time monitoring and alarm of wire rope breakage, ensuring the safety and reliability of the system.

[0069] The hoisting and conveying system disclosed in this invention can be designed in three installation forms: fixed installation, semi-mobile, and mobile. Fixed installation refers to an installation method where the components of the hoisting and conveying system connected to the foundation are fixedly connected to the foundation by welding or anchor bolts, using methods such as foundation plates and anchor bolts. This installation method is safe and reliable, but it is costly, difficult to disassemble and assemble, and time-consuming. It is mainly used in open-pit mines where the components of the hoisting and conveying system do not need to be moved after installation or where the relocation interval is long. Semi-mobile installation refers to a method where the components of the hoisting and conveying system connected to the foundation are directly placed on the pre-treated ground. The foundation components themselves do not have self-moving mechanisms or power sources. They are usually designed with structures such as slippers, front and rear wedges, or tires, and are moved by external traction or pushing. This installation method does not require foundation plates or anchor bolts, making relocation convenient, quick, and low-cost. It is mainly used in open-pit mines where relocation is relatively frequent after installation (usually once every six months to one year). Mobile hoisting refers to hoisting and conveying systems where the components connected to the foundation are designed with a moving mechanism and have their own power system, such as tracked walking mechanisms and tire drive systems. They are easy and quick to relocate, but have high manufacturing costs. They are mainly used in open-pit mines where frequent relocation is required after installation (usually once every 1 to 2 months).

[0070] The left track beam 18 and the right track beam 28 are erected in the air by using the left support device 19 and the right support device 29 of the track beam, so that the distance from the lower edge of the left track beam 18 and the right track beam 28 to the step plane meets the conditions for traffic. This will not affect the traffic requirements of the mine, which is conducive to the upgrading and transformation of old mines and can also meet the traffic needs of new mine construction.

[0071] This lifting and conveying system replaces the traditional uphill sections transported by open-pit mine trucks with a conveying method, effectively reducing the impact of severe weather such as rain and snow on the system's operation. It avoids accidents involving personnel and vehicles caused by slippage or road entrapment that can occur with mining trucks during heavy rain or snow, which typically necessitate shutdowns. This significantly improves the system's safety, operating time, and efficiency.

[0072] Furthermore, when designing new mines or renovating old mines, adopting this hoisting and conveying technology in the design of ore conveying ramps or in the renovation of old mines can replace the original fuel-powered mining trucks with electric mining trucks, realizing the widespread application of electric mining trucks in mines. This can not only significantly reduce transportation costs but also reduce pollution emissions from mines, enabling mines to develop in a green and environmentally friendly direction.

[0073] Furthermore, the lifting and conveying system is designed with both automatic and manual operation modes. The automatic operation mode can be combined with the mine's 5G communication and Beidou navigation system, and uses driverless mining trucks for transportation, which can realize the intelligent transportation of ore throughout the mine.

[0074] It should be noted that in this paper, the basic double-track system 200 is the basic conveying unit. The open-pit mine steep-angle track mining truck double-track hoisting and conveying system described in this paper can be one set of the aforementioned basic double-track system 200, which extends from the bottom of the mine pit to the top. The above description refers to one set of the aforementioned basic double-track system 200 and its conveying method. Of course, the open-pit mine steep-angle track mining truck double-track hoisting and conveying system can also be a series hoisting and conveying system 100, a parallel hoisting and conveying system 110, or a series-parallel hoisting and conveying system 120 composed of multiple sets of basic double-track systems 200. Details are as follows:

[0075] like Figure 4 As shown, the series hoisting and conveying system 100 includes a bottom hoisting and conveying unit 1001, a middle hoisting and conveying unit 1002, and a top hoisting and conveying unit 1003. The bottom hoisting and conveying unit 1001 is located at the bottom of the mine pit, and the top hoisting and conveying unit 1003 is located at the top of the mine pit. The bottom hoisting and conveying unit 1001 and the top hoisting and conveying unit 1003 are both a set. The number of middle hoisting and conveying units 1002 is greater than or equal to 0. They are all basic double-line systems 200, and they are arranged in a staggered and series manner along the inclined direction of the mine steps.

[0076] In the series lifting and conveying system 100, two adjacent sets of basic double-line systems 200 are connected on the same level step plane 91. On the step plane 91 where the connection is made, each set of basic double-line systems 200 has a turntable 1004 on one side of the inclined surface 92 of the step above the previous step 9 for its left lifting and conveying line 1 and right lifting and conveying line 2. Figure 7 As shown, the top surface of the rotary table 1004 is flush with the step plane 91 of the step 9.

[0077] When the mining truck 10 moves between two adjacent basic double-track systems 200, the mining truck 10 first drives out of the current basic double-track system 200 from the transport trolley and mining truck bridge and drives to the corresponding turntable 1004. After turning, it drives away from the current basic double-track system 200. Then it drives into the turntable 1004 corresponding to the next basic double-track system 200. After turning on the turntable 1004 to center the corresponding mining truck bridge, it drives into the corresponding transport trolley from the corresponding mining truck bridge.

[0078] During operation, fully loaded mining trucks enter the transport trolley of the bottom hoisting and conveying unit 1001, and are sequentially hoisted to the top of the mine by the bottom hoisting and conveying unit 1001, the intermediate hoisting and conveying unit 1002, and the top hoisting and conveying unit 1003. They then exit from the top hoisting and conveying unit 1003, travel to a designated location for unloading, return, and re-enter the top hoisting and conveying unit 1003. The trucks then return to the bottom of the mine in the reverse order of the top hoisting and conveying unit 1003, the intermediate hoisting and conveying unit 1002, and the bottom hoisting and conveying unit 1001. After exiting the transport trolley, they proceed to the loading point to continue loading ore. The series hoisting and conveying system 100 can significantly increase the hoisting and conveying height of ore, meeting the hoisting and conveying requirements of ultra-deep open-pit mines.

[0079] like Figure 5 As shown, the parallel hoisting and conveying system 110 includes a left hoisting and conveying unit 1101, a middle hoisting and conveying unit 1102, and a right hoisting and conveying unit 1103. The left and right hoisting and conveying units 1101 and 1103 are each a single set, while the number of middle hoisting and conveying units 1102 is greater than or equal to zero. All three units—left, right, and middle—are basic double-line systems 200, arranged side-by-side. During operation, each unit operates independently without affecting the others; they can work simultaneously or individually. The parallel hoisting and conveying system can significantly increase the ore hoisting and conveying capacity, meeting the ore conveying requirements of ultra-large open-pit mines.

[0080] like Figure 6 As shown, the series-parallel hoisting and conveying system 120 includes a left hoisting and conveying unit 1201, a middle hoisting and conveying unit 1202, and a right hoisting and conveying unit 1203. The left and right hoisting and conveying units 1201 and 1203 are each a set, while the number of middle hoisting and conveying units 1202 is greater than or equal to zero. All three sets of units are part of the series hoisting and conveying system 100. Multiple sets of series hoisting and conveying systems 100 are arranged side-by-side. During operation, the left, middle, and right hoisting and conveying units 1201, 1202, and 1203 operate independently without affecting each other; they can operate simultaneously or individually. The series-parallel hoisting and conveying system can not only significantly increase the hoisting and conveying height of ore but also significantly increase the hoisting and conveying capacity, simultaneously meeting the hoisting and conveying requirements of ultra-high and ultra-large open-pit mines.

[0081] In the description of this specification, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0082] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A double-track hoisting and conveying system for open-pit mine trucks with steeply inclined tracks, characterized in that: Includes a basic dual-line system (200), which includes a left lifting conveyor line (1), a right lifting conveyor line (2) and a main drive system (3); The left lifting conveyor line (1) and the right lifting conveyor line (2) have the same structure and are arranged side by side and symmetrically with respect to the center line of the entire conveying system; The left hoisting conveyor line (1) includes a left drum device (11), a left wire rope (12), a left track beam (18), a left mine truck overpass (15), and a left transport trolley (17) for transporting mine trucks (10); there are two sets of left track beams (18), which are symmetrically erected on both sides of the center line of the left hoisting conveyor line (1), and each set of left track beams (18) extends upwards at an incline from the bottom of the mine pit to the top of the mine pit; each set of left track beams (18) is equipped with a track; the left transport trolley... The trolley (17) is movably mounted on the track along the extension direction of the left track beam (18); the left drum device (11) includes a left drum one (111) and a left drum two (114), which are connected in series to form a double drum via a left drum coupling (113); the spiral grooves on the left drum one (111) and the left drum two (114) have opposite rotation directions; the left wire rope (12) is set between the left drum device (11) and the left transport trolley (17); The right hoisting conveyor line (2) includes a right drum device (21), a right wire rope (22), a right track beam (28), a right mine car overpass (25), and a right transport trolley (27); there are two sets of right track beams (28), which are symmetrically erected on both sides of the right hoisting conveyor line (2), and each set of right track beams (28) extends upwards at an incline from the bottom of the mine pit to the top of the mine pit; each set of right track beams (28) is equipped with a track; the right transport trolley (27) runs along... The right track beam (28) is movably mounted on the track in the extension direction; the right drum device (21) includes a right drum one (211) and a right drum two (214), which are connected in series to form a double drum via a right drum coupling (213); the spiral grooves on the right drum one (211) and the right drum two (214) have opposite rotation directions; the right wire rope (22) is set between the right drum device (21) and the right transport trolley (27); The mining truck overpass is installed at the top of the corresponding track beam, and its upper surface is flush with the step plane at the top of the corresponding track beam. When the transport trolley runs to the limit position at the top of the track, the upper surface of the transport trolley forms a passage with the mining truck overpass and the top step plane. A downward recessed groove is provided on the step plane at the bottom of the corresponding track beam, and the track beam extends into the groove. When the transport trolley runs to the limit position at the bottom of the track, the upper surface of the transport trolley is flush with the bottom step plane. The left wire rope (12) exits from the left drum device (11) and the right wire rope (22) exits from the right drum device (21) in opposite directions, one up and one down. The left drum device (11) and the right drum device (21) are connected to the main drive system (3). The main drive system (3) drives the left drum device (11) and the right drum device (21) to rotate synchronously, so that the wire rope pulls the corresponding transport trolley to run along the corresponding track.

2. The double-track hoisting and conveying system for open-pit mine trucks with steep inclines as described in claim 1, characterized in that: Two sets of left moving pulley blocks (16) are arranged on the left transport trolley (17); after the left transport trolley (17) is installed on the track, the two sets of left moving pulley blocks (16) are symmetrical about the center line of the left lifting and conveying line (1); two sets of left balance pulley blocks (14) are set diagonally above the top of the left track beam, the two sets of left balance pulley blocks (14) are symmetrical about the center line of the left lifting and conveying line (1), and a set of left tension pulley blocks (20) is set in the middle of the two sets of left balance pulley blocks (14); two sets of left redirection pulley blocks (13) are set between the top of the left track beam (18) and the left drum device (11), the two sets of left redirection pulley blocks (13) are symmetrical about the center line of the left lifting and conveying line (1); one end of the left wire rope (12) is fixed to the left drum one (111), and the other end After passing the left redirecting pulley block (13) on the left, it extends downward along the track direction to the left moving pulley block (16) on the left side of the left transport trolley (17). After passing the left moving pulley block (16) on the left, it extends upward along the track direction to the left balance pulley block (14) on the left. Then, it passes the left balance pulley block (14) on the left, the left tensioning pulley block (20) and the left balance pulley block (14) on the right in sequence, and extends downward along the track direction to the left moving pulley block (16) on the right side of the left transport trolley (17). After passing the left moving pulley block (16) on the right side of the left transport trolley (17), it extends upward along the track direction to the left redirecting pulley block (13) on the right. After passing the left redirecting pulley block (13) on the right, it extends to the left drum two (114) and is fixed to the left drum two (114). Two sets of right moving pulley blocks (26) are arranged on the right transport trolley (27); after the right transport trolley (27) is installed on the track, the two sets of right moving pulley blocks (26) are symmetrical about the center line of the right lifting and conveying line (2); two sets of right balancing pulley blocks (24) are set diagonally above the top of the right track beam (28), the two sets of right balancing pulley blocks (24) are symmetrical about the center line of the right lifting and conveying line (2), and a set of right tensioning pulley blocks (30) is set in the middle of the two sets of right balancing pulley blocks (24); two sets of right redirecting pulley blocks (23) are set between the top of the right track beam (28) and the right drum device (21), the two sets of right redirecting pulley blocks (23) are symmetrical about the center line of the right lifting and conveying line (2); one end of the right wire rope (22) is fixed to the right drum (211). The other end extends downward along the track direction after passing the right redirecting pulley block (23) on the right side to the right moving pulley block (26) on the right side of the right transport trolley (27). After passing the right moving pulley block (26) on the right side, it extends upward along the track direction to the right balance pulley block (24) on the right side. After passing the right balance pulley block (24), the right tensioning pulley block (30), and the right balance pulley block (24) on the left side in sequence, it extends downward along the track direction to the right moving pulley block (26) on the left side of the right transport trolley (27). After passing the right moving pulley block (26) on the left side of the right transport trolley (27), it extends upward to the right redirecting pulley block (23) on the left side, and after passing the right redirecting pulley block (23) on the left side, it extends to the right drum two (214) and is fixed to the right drum two (214).

3. The double-track hoisting and conveying system for open-pit mine trucks with steep inclines as described in claim 1, characterized in that: The left drum 1 (111) is equipped with a left disc brake 1 (112) at its end; the left drum 2 (114) is equipped with a left disc brake 2 (115) at its end; the right drum 1 (211) is equipped with a right disc brake 1 (212) at its end; and the right drum 2 (214) is equipped with a right disc brake 2 (215) at its end.

4. The double-track hoisting and conveying system for open-pit mine trucks with steep inclines as described in claim 3, characterized in that: The steps (9) formed by mining include a step plane (91) and a step slope (92) connecting two adjacent step planes (91); the left track beam (18) is erected on the step plane (91) of the steps (9) formed by mining via a left support device (19); the right track beam (28) is erected on the step plane (91) of the steps (9) formed by mining via a right support device (29).

5. The double-track hoisting and conveying system for open-pit mine trucks with steep inclines according to claim 4, characterized in that: Both the left support device (19) and the right support device (29) are located close to the outside of the step plane (91).

6. The double-track hoisting and conveying system for open-pit mine steep-angle railcars according to any one of claims 1 to 5, characterized in that: The main drive system (3) includes a main motor (31), a left transmission system (32) and a right transmission system (33). The left transmission system (32) includes a left normally closed clutch (321), a left connecting shaft one (322), a left coupling one (323), a left main reducer (325), and a left coupling two (326); the right end of the left normally closed clutch (321) is connected to the left output shaft of the main motor (31), and its left end is connected to the left connecting shaft one (322). Under normal operating conditions, both are in a closed state to ensure the safety of the entire system; the left coupling one (322) 3) The left end of the coupling is provided with a brake wheel and is connected to the input shaft on the right side of the left main reducer (325), and its right end is connected to the left connecting shaft one (322); the right end of the left coupling two (326) is provided with a brake wheel and is connected to the input shaft on the left side of the left main reducer (325), and its left end is connected to the left connecting shaft two (41); the left coupling one (323) is provided with a left block brake one, and the left coupling two (326) is provided with a left block brake two; The right transmission system (33) includes a right normally closed clutch (331), a right connecting shaft one (332), a right coupling one (333), a right main reducer (335), and a right coupling two (336); the left end of the right normally closed clutch (331) is connected to the right output shaft of the main motor (31), and its right end is connected to the right connecting shaft one (332). Under normal operating conditions, both are in a closed state to ensure the safety of the entire system; the right coupling one (332) is connected to the right output shaft of the main motor (31) at its left end, and to the right connecting shaft one (332) at its right end. 3) The right end of the coupling is provided with a brake wheel and connected to the input shaft on the left side of the right main reducer (335), and its left end is connected to the right connecting shaft one (332); the left end of the right coupling two (336) is provided with a brake wheel and connected to the input shaft on the right side of the right main reducer (335), and its right end is connected to the right connecting shaft two (51); the right coupling one (333) is provided with a right block brake one, and the right coupling two (336) is provided with a right block brake two.

7. The double-track hoisting and conveying system for open-pit mine trucks with steep inclines as described in claim 6, characterized in that: The left drum device (11) is connected to the output shaft of the left main reducer (325) via the left drum device coupling (6); the right drum device (21) is connected to the output shaft of the right main reducer (335) via the right drum device coupling (7).

8. The double-track hoisting and conveying system for open-pit mine trucks with steep inclines according to claim 6, characterized in that: It is also equipped with a left slow drive system (4) and a right slow drive system (5); The left slow drive system (4) includes a left connecting shaft two (41), a left slow reducer (43) and a left slow motor (45); the left slow motor (45) and the input shaft of the left slow reducer (43) are connected by a left coupling three (44); the output shaft of the left slow reducer (43) is connected to the left end of the left normally open clutch (42), and the left normally open clutch (42) is in the disengaged state under normal working conditions; the left end of the left connecting shaft two (41) is connected to the right end of the left normally open clutch (42), and its right end is connected to the left end of the left coupling two (326) on the left side of the left main reducer (325); The right slow drive system (5) includes a right connecting shaft two (51), a right slow reducer (53) and a right slow motor (55); the right slow motor (55) and the input shaft of the right slow reducer (53) are connected by a right coupling three (54); the output shaft of the right slow reducer (53) is connected to the right end of the right normally open clutch (52), and the right normally open clutch (52) is in a disengaged state under normal working conditions; the right end of the right connecting shaft two (51) is connected to the left end of the right normally open clutch (52), and its left end is connected to the right end of the right coupling two (336) on the right side of the right main reducer (335).

9. The double-track hoisting and conveying system for open-pit mine trucks with steep inclines according to claim 6, characterized in that: An open gear pair (8) is provided between the left drum device (11) and the left main reducer (325) and between the right drum device (21) and the right main reducer (335); the open gear pair (8) is composed of a pinion (81) and a gear (82); the pinion (81) is installed on the output shaft of the left main reducer (325) and the right main reducer (335), and the gear (82) is installed on the end face of the left drum (114) and the right drum (214).

10. The double-track hoisting and conveying system for open-pit mine trucks with steep inclines according to claim 4, characterized in that: The series hoisting and conveying system (100) is composed of multiple sets of the aforementioned basic double-line systems (200) arranged in a staggered and connected manner along the inclined direction of the mine steps; two adjacent sets of basic double-line systems (200) in the series hoisting and conveying system (100) are connected on the same level step plane (91); on the step plane (91) at the connection point, a turntable (1004) is respectively set on the side of the left hoisting and conveying line (1) and the right hoisting and conveying line (2) of each set of basic double-line systems (200) near the inclined surface (92) of the upper step; the top surface of the turntable (1004) is flush with the step plane (91) where it is located, and is used for the mine truck (10) to turn and transfer between the upper and lower adjacent basic double-line systems (200).

11. The double-track hoisting and conveying system for open-pit mine trucks with steep inclines according to claim 10, characterized in that: The series-parallel hoisting and conveying system (120) is composed of multiple sets of the series hoisting and conveying systems (100) arranged in parallel along the plane (91) of the mine bench.

12. The double-track hoisting and conveying system for open-pit mine steep-angle rails for mining trucks according to claim 4, characterized in that: The parallel hoisting and conveying system (110) is composed of multiple sets of the aforementioned basic double-line system (200) arranged in parallel along the step plane (91) of the mine bench.

13. A conveying method using the double-track hoisting and conveying system for open-pit mine trucks with steeply inclined tracks as described in claim 9, characterized in that: First, a fully loaded mining truck (10) enters the left hoisting conveyor line (1) and is located at the left transport trolley (17) at the bottom of the mine; an empty mining truck (10) returns and enters the right hoisting conveyor line (2) and is located at the right transport trolley (27) at the top of the mine. Next, the main motor (31) starts to rotate forward, and the left hoisting conveyor line (1) lifts the left carrying trolley (17) and the fully loaded mining truck (10) to the top of the mine, while the right hoisting conveyor line (2) lowers the right carrying trolley (27) and the empty returning mining truck (10) to the bottom of the mine. Then, the fully loaded mining truck (10) arrives at the top of the mine and drives out the left transport trolley (17), while the empty returning mining truck (10) arrives at the bottom of the mine and drives out the right transport trolley (27). Next, the next fully loaded mining truck (10) enters the right hoisting conveyor line (2) and is located on the right transport trolley (27) at the bottom of the mine, while the next empty returning mining truck (10) enters the left hoisting conveyor line (1) and is located on the left transport trolley (17) at the top of the mine. Finally, the main motor (31) starts to reverse, the left lifting conveyor line (1) lowers the left carrying trolley (17) and the empty returning mining truck (10), while the right lifting conveyor line (2) lifts the right carrying trolley (27) and the fully loaded mining truck (10).

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