High-efficiency mine draw shaft structure

Abstract

The utility model belongs to the technical field of mining engineering, and particularly discloses a high-efficiency mine draw shaft structure. A draw shaft of the draw shaft structure is arranged at the top end of the middle-section transportation roadway, and one end of a draw shaft linkage channel is communicated with a mining preparation trunk line; at least two mining preparation main lines on a horizontal or subsection are communicated with the same draw shaft through a draw shaft connecting channel, an inclined chute is brushed on the lower edge of the connecting position of the draw shaft connecting channel and the draw shaft in an expanding mode, a grizzly screen is arranged at the top end of the inclined chute, a concrete separation wall is arranged on the side, close to the draw shaft, of the draw shaft connecting channel, and a car stopping table is arranged on the side, away from the draw shaft, of the inclined chute of the draw shaft connecting channel. According to the utility model, a plurality of mining preparation main lines are communicated with the same draw shaft through the corresponding draw shaft links, so that a plurality of horizontal or segmented ore drawing can be simultaneously carried out in one draw shaft, the number of the draw shafts is effectively reduced, the development construction cost is reduced, the construction period is shortened, the use efficiency of the draw shafts is also improved, and meanwhile, the installation number of horizontal ore drawing vibration machines for transportation is reduced; the method has the characteristics of low construction cost, short construction period and high use efficiency of the draw shaft.

Description

Technical Field

[0001] This utility model belongs to the field of mining engineering technology, specifically relating to a high-efficiency mine pass structure with low construction cost, short construction period, and high pass utilization efficiency. Background Technology

[0002] During mining operations, the high altitude of most mines results in long ore transportation distances, leading to low efficiency and high costs. To improve transportation efficiency and save costs, some mines construct shaft-like tunnels running from top to bottom, allowing ore to be dumped directly from above. The ore then falls automatically by gravity to the bottom intermediate transport tunnel, where it is transported out by vehicles.

[0003] Traditional mine ore passes consist of one pass at each level or section, from which ore is then lowered into the intermediate transport roadway at the bottom. While this ore pass structure significantly improves the efficiency of intermediate ore delivery and enables efficient intermediate transport (e.g., ... Figure 1 (As shown). However, since a ore pass must be set up at each level or section as a ore passage, for multi-level and multi-section intermediate sections, it will result in the need to construct many ore passes. In particular, the repetitive construction of high ore passes in intermediate sections will increase the amount of engineering work and waste in the use of intermediate ore passes.

[0004] In existing technologies, to address the problems of traditional mine ore passes, one approach involves directly constructing downward-sloping chutes at multiple levels or sections, connecting each mining preparation line to the same pass. This allows for pass sharing, avoiding redundant construction and eliminating the need for transportation between the mining preparation lines and the pass. However, excessively long chutes not only easily lead to ore blockage but also cause ore to fall into the pass at excessive speed, resulting in significant impact on the pass walls. This is especially problematic when the pass is located in areas with fractured surrounding rock, potentially causing wall collapse and endangering mine safety. To address this, another approach involves constructing horizontal pass connecting lines at each level or section, then transporting ore by vehicle to the connection point and dumping it into the chute before it slides into the pass, thus reducing the impact on the pass walls. However, during ore extraction from the upper section of the ore pass, not only does the collision between the ore and the shaft wall easily generate flying rocks in the lower section's connecting passage, injuring workers or damaging equipment, but the dust from the ore discharge also enters the lower section's connecting passage, forming dust mist and endangering workers' health. Therefore, some methods have been implemented to prevent flying rocks and dust from entering the connecting passage by installing protective baffles at the upper part of the connection between the connecting passage and the ore pass, or by not directly connecting the connecting passage to the ore pass and instead drilling inclined ore passage holes in the ground of the connecting passage. However, while directly installing protective baffles is simple to construct, the dust protection effect is poor, and there is also a risk of screen maintenance personnel falling into the ore pass; while drilling inclined ore passage holes offers better protection in both methods, the limited space in the connecting passage makes construction difficult and time-consuming. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a mine pass structure that features low construction costs, short construction period, and high pass utilization efficiency.

[0006] This utility model is implemented as follows: it includes a chute, a mid-section transport roadway, a chute connecting roadway, and a mining preparation main line. The chute is vertically installed at the top of the mid-section transport roadway, and one end of the chute connecting roadway is connected to the mining preparation main line.

[0007] At least two horizontal or segmented mining trunk lines are connected to the same chute via corresponding chute connecting channels. The chute connecting channel has a downwardly sloping chute at the connection point with the chute. A screen is installed at the top of the chute. A concrete isolation wall is installed on the side of the chute closer to the chute. A platform protruding above the ground is installed on the side of the chute away from the chute.

[0008] Furthermore, the sloping chute has an expansion angle of 45–60°.

[0009] Furthermore, the concrete isolation wall is a double-layer reinforced concrete wall with a grid spacing of 200-300mm × 200-300mm, and the thickness of the concrete isolation wall is 800-1200mm. The bottom of the concrete isolation wall is also provided with support rods at both ends anchored into the inner walls of the chute connecting passage.

[0010] Furthermore, the bottom of the concrete isolation wall is provided with multiple support rods at intervals. The support rods are I-beams, channel steel, or square steel. At least the top of each of the multiple support rods is horizontally fixed with a support plate. The concrete isolation wall is poured on the top of the support plate, and the bottom of the double-layer mesh reinforcement is fixedly connected to the support plate.

[0011] Furthermore, the double-layer mesh reinforcement of the concrete isolation wall is made of steel bars of φ16~φ20mm tied or welded together, and the side of the double-layer mesh reinforcement is fixedly connected to several anchor piles anchored into the inner wall of the chute connecting channel.

[0012] Furthermore, the side of the double-layer mesh reinforcement is connected to at least two rows of rooting piles, the row spacing of the rooting piles connected to the side of the double-layer mesh reinforcement is 600-1000mm and the spacing is 600-1000mm, and the rooting piles are threaded steel bars of φ16-φ20mm.

[0013] Furthermore, the total length of the connecting passages of each mining trunk line connected to one of the chutes in this utility model shall not exceed twice the total length of the chutes.

[0014] Furthermore, a concrete well ring is circumferentially cast at the top of the inclined chute between the concrete isolation wall and the stop platform, and the grid screen is embedded in the top of the concrete well ring, with the hole spacing of the grid screen being 600-800mm × 600-800mm.

[0015] Furthermore, the concrete well ring is embedded in the ground of the chute connecting channel by no less than 800mm, the steel bars inside the concrete well ring are fixedly connected to the anchor rods anchored into the inner walls on both sides of the chute connecting channel, and the stop platform is a concrete platform with its bottom staggered with the top of the concrete well ring.

[0016] Furthermore, the platform protrudes at least 500mm above the ground of the chute connecting road, and the platform is provided with a water guide hole connecting to the inclined chute or at least one side is provided with a drainage ditch.

[0017] The beneficial effects of this utility model are:

[0018] 1. This utility model connects multiple horizontal or segmented mining trunk lines to the same pass through corresponding pass connecting channels, enabling multiple horizontal or segmented ore to be discharged simultaneously in one pass. This effectively reduces the number of passes, not only lowering the construction cost and shortening the construction period of pass development, but also improving the utilization efficiency of passes. At the same time, it can also reduce the number of horizontal ore discharge vibrators to be installed, effectively reducing the cost of ore mining.

[0019] 2. This utility model expands and smears the inclined chute at the connection between the chute and the chute, which is more convenient to construct than the inclined chute borehole. A screen is installed at the top of the inclined chute, which can isolate ore that does not meet the size specifications, thus avoiding chute blockage and slowing down the dumping speed to reduce the impact on the inclined chute and the inner wall of the chute. In addition, a concrete isolation wall is set on the side of the chute connecting channel near the chute, which can prevent flying stones and dust from entering the chute connecting channel and prevent screen maintenance personnel from falling into the chute, and also facilitates the construction of expanding and smearing the inclined chute. Furthermore, a stop platform is set on the side of the inclined chute away from the chute, especially a concrete stop platform, which is more adaptable to humid environments and more sturdy and reliable than the traditional wooden stop platform. Together with the screen and the concrete isolation wall, it can significantly improve the safety of loading equipment operation.

[0020] In summary, this utility model has the characteristics of low construction cost, short construction period, and high efficiency of chute use. Attached Figure Description

[0021] Figure 1 A schematic diagram of the existing underground mine chute structure;

[0022] Figure 2 This is a schematic diagram of the chute structure of this utility model;

[0023] Figure 3 for Figure 2 A magnified view of a portion of the image;

[0024] Figure 4 for Figure 3 Sectional view along axis AA;

[0025] In the diagram: 1-Pass, 2-Intermediate transport roadway, 3-Pass connecting road, 4-Mining preparation main line, 5-Inclined chute, 6-Grid screen, 7-Concrete isolation wall, 8-Wheel stop, 9-Support rod, 10-Support plate, 11-Double-layer mesh reinforcement, 12-Rooting pile, 13-Pass vibratory machine chamber, 14-Concrete well ring. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this does not limit the present invention in any way. Any changes or improvements made based on the teachings of the present invention shall fall within the protection scope of the present invention.

[0027] like Figure 2 , 3 As shown in Figure 4, this utility model includes a chute 1, a mid-section transport roadway 2, a chute connecting roadway 3, and a mining preparation main line 4. The chute 1 is vertically installed at the top of the mid-section transport roadway 2, and one end of the chute connecting roadway 3 is connected to the mining preparation main line 4.

[0028] At least two horizontal or segmented mining trunk lines 4 are connected to the same chute 1 via corresponding chute connecting channels 3. The chute connecting channel 3 has a downwardly sloping chute 5 at the connection with the chute 1. A screen 6 is provided at the top of the chute 5. A concrete isolation wall 7 is provided on the side of the chute 5 close to the chute 1. A platform 8 protruding from the ground is provided on the side of the chute 5 away from the chute 1.

[0029] The sloping chute 5 has an expansion angle of 45-60°.

[0030] The concrete isolation wall 7 is a double-layer reinforced concrete wall with a grid spacing of 200-300mm × 200-300mm. The thickness of the concrete isolation wall 7 is 800-1200mm. The bottom of the concrete isolation wall 7 is also provided with support rods 9, which are anchored into the inner walls of both sides of the chute connecting channel 3 at both ends.

[0031] The bottom of the concrete isolation wall 7 is provided with multiple support rods 9 at intervals. The support rods 9 are I-beams, channel steel, or square steel. At least the top of the multiple support rods 9 are horizontally fixed with support plates 10. The concrete isolation wall 7 is poured on the top of the support plates 10. The bottom of the double-layer mesh reinforcement 11 is fixedly connected to the support plates 10.

[0032] The double-layer mesh reinforcement 11 of the concrete isolation wall 7 is made of steel bars of φ16~φ20mm tied or welded together, and the side of the double-layer mesh reinforcement 11 is fixedly connected to a number of anchor piles 12 anchored into the inner wall of the chute connecting channel 3.

[0033] The double-layer mesh reinforcement 11 has at least two rows of rooting piles 12 connected to its side. The row spacing of the rooting piles 12 connected to the side of the double-layer mesh reinforcement 11 is 600-1000mm and the spacing between them is 600-1000mm. The rooting piles 12 are threaded steel bars with a diameter of φ16-φ20mm.

[0034] In this invention, the total length of the corresponding chute connecting road 3 of each mining trunk line 4 connected to a chute 1 shall not exceed twice the total length of the chute 1.

[0035] The top of the inclined chute 5 is circumferentially cast with a concrete well ring 14 between the concrete isolation wall 7 and the stop platform 8. The grid screen 6 is embedded in the top of the concrete well ring 14, and the hole spacing of the grid screen 6 is 600-800mm × 600-800mm.

[0036] The concrete well ring 14 is embedded in the ground of the chute connecting channel 3 by no less than 800mm. The steel bars inside the concrete well ring 14 are fixedly connected to the anchor rods anchored into the inner walls on both sides of the chute connecting channel 3. The wheel stop 8 is a concrete platform and its bottom is staggered with the top of the concrete well ring 14.

[0037] The wheel stop platform 8 protrudes at least 500mm above the ground of the chute connecting channel 3, and the wheel stop platform 8 is provided with a water guide hole that connects to the inclined chute 5 or at least one side is provided with a drainage ditch.

[0038] The working principle and process of this utility model:

[0039] like Figure 2 , 3 As shown in Figure 4, during ore extraction, the ore (slag) in the corresponding mining trunk line 4 is transported to the side of the inclined chute 5 via the loading equipment through the chute connecting roadway 3. The wheels of the loading equipment stop under the obstruction of the stop platform 8, and the ore (slag) in the truck is dumped onto the screen 6. Some of the larger ore (slag) is isolated on the screen 6, while most of the ore (slag) that meets the size requirements falls into the inclined chute 5 through the screen 6. Then, under its own gravity, it slides down to the chute 1 and falls into the ore discharge vibrator at the top of the intermediate transport roadway 2. Finally, it is transported by the transport vehicles or conveying equipment in the intermediate transport roadway 2. The large-sized ore (slag) on ​​the screen 6 is crushed by the crushing device or crushing tool and falls into the inclined chute 5, and finally slides into the chute 1, completing the transportation of the ore (slag).

[0040] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A high-efficiency mine chute structure, comprising a chute (1), a mid-level transport roadway (2), a chute connecting roadway (3), and a mining preparation main line (4), wherein the chute (1) is vertically installed at the top of the mid-level transport roadway (2), and one end of the chute connecting roadway (3) is connected to the mining preparation main line (4); characterized in that: At least two horizontal or segmented mining trunk lines (4) are connected to the same chute (1) via corresponding chute connecting channels (3). The chute connecting channel (3) has a downwardly sloping chute (5) at the connection point with the chute (1). A screen (6) is provided at the top of the chute (5). A concrete isolation wall (7) is provided on the side of the chute (5) closest to the chute (1). A platform (8) protruding from the ground is provided on the side of the chute (5) furthest from the chute (1). The concrete isolation wall (7) is a mesh. A double-layer reinforced concrete wall (11) with a grid spacing of 200-300mm × 200-300mm, the thickness of the concrete partition wall (7) is 800-1200mm, and the bottom of the concrete partition wall (7) is also provided with support rods (9) with both ends anchored into the inner walls of the chute connecting channel (3); multiple support rods (9) are spaced apart at the bottom of the concrete partition wall (7), the support rods (9) are I-beams, channel steel or square steel, and the multiple support rods (9) are at least horizontally fixed with support plates (10) at the top. The concrete partition wall (7) is poured Built on the top of the support plate (10), the bottom end of the double-layer mesh reinforcement (11) is fixedly connected to the support plate (10); the double-layer mesh reinforcement (11) of the concrete isolation wall (7) is made of φ16~φ20mm steel bars tied or welded, and the side of the double-layer mesh reinforcement (11) is fixedly connected to several root piles (12) anchored into the inner wall of the chute connecting channel (3); the top of the inclined chute (5) is circumferentially cast with a concrete well ring (14) between the concrete isolation wall (7) and the stop platform (8), and the grid screen (6) is embedded in the top of the concrete well ring (14), the grid screen ( 6) The hole spacing is 600~800mm×600~800mm; the concrete well ring (14) is embedded in the ground of the chute connecting channel (3) by no less than 800mm, the steel bars in the concrete well ring (14) are fixedly connected to the anchor rods anchored into the inner walls on both sides of the chute connecting channel (3), the stop platform (8) is a concrete platform and its bottom is staggered with the top of the concrete well ring (14); the stop platform (8) protrudes from the ground of the chute connecting channel (3) by no less than 500mm, the stop platform (8) is provided with a water guide hole that connects to the inclined chute (5) or at least one side is provided with a drainage ditch.

2. The high efficiency mine chute structure of claim 1, wherein: The sloping chute (5) has an expansion angle of 45-60°.

3. The high efficiency mine chute structure of claim 1, wherein: The double-layer mesh reinforcement (11) is connected to at least two rows of rooting piles (12) on its side. The row spacing of the rooting piles (12) connected to the side of the double-layer mesh reinforcement (11) is 600-1000mm and the spacing is 600-1000mm. The rooting piles (12) are threaded steel bars of φ16-φ20mm.

4. The high efficiency mine chute structure according to any one of claims 1 to 3, characterized in that: The total length of the corresponding chute connecting road (3) of each mining preparation trunk line (4) connected to a chute (1) shall not exceed twice the total length of the chute (1).

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