A main shaft ore discharging chamber ore rock filtering and shunting system and a construction method thereof

Abstract

The application discloses a kind of main chute ore discharging chamber ore rock filtering and shunting system and construction method, the system includes ore discharging port, ore rock collection and hoisting device, transfer port and shunting mine tunnel. The mined ore rock is discharged to main chute by ore rock filtering and shunting system, and once filtering is completed at the grid of ore discharging port. Small ore rock bulk is directly placed to main chute by inclined chute, and large ore rock filtered by grid falls to ore rock storage rack under its own weight. Workers collect and clean scattered ore rock blocks through pedestrian passageway, and ore rock on ore rock storage rack is transferred to transport tunnel through transfer port. After secondary crushing, it is directly placed to main chute through shunting mine tunnel. Ore rock filtering and shunting system can effectively control the size of ore rock placed in main chute, prevent large-size ore rock from impacting and collapsing the wall of main chute, and prevent the problem of main chute blockage caused by large-size ore rock occlusion, to ensure the long-term safe and stable operation of main chute.

Description

Technical Field

[0001] This invention belongs to the field of geological disaster prevention and resource extraction technology in underground mine engineering, specifically relating to an indoor ore and rock filtration and diversion system and construction method for a main ore pass unloading chamber. Background Technology

[0002] Ore passes play a crucial role in simplifying mine hoisting and transportation systems, improving production efficiency, and reducing costs. They are widely used in underground metal mining and are key engineering projects for achieving efficient and low-cost downward transportation of ore (and waste rock) in multi-stage transportation processes. The efficiency of ore pass discharge directly affects mine production capacity. Based on various phenomena observed during operation, ore pass discharge mainly faces two major problems: first, ore pass blockage caused by interruption of material flow during discharge; and second, deformation and damage to the ore pass walls under various forces, seriously affecting mine production safety.

[0003] Setting up a buffer layer at the junction of the inclined chute and the main chute is a common safety measure in mines to prevent direct impact of ore on the shaft wall. Chinese invention patent application number 202110795810.0 discloses a facility for buffering ore impact on the main chute wall, including a branch chute, a buffer steel curtain, and a ore-binding funnel. A branch chute is set up on one side of the main chute, a buffer steel curtain is set at the junction of the branch chute and the main chute, and an ore-binding funnel is set at the lower part of the junction of the branch chute and the main chute, directly opposite the opening of the main chute. The well includes a grid, inclined well walls, vertical well walls, an inclined section top plate, an inclined section bottom plate, and buffer steps. The grid is located at the upper end of the branch ore pass. A vertical well wall is installed below the grid on the side away from the main ore pass, while an inclined well wall is used on the side closer to the main ore pass. The lower part of the vertical well wall connects to the inclined section bottom plate, and the lower part of the inclined well wall connects to the inclined section top plate. The inclined section section, composed of the inclined section top plate and the inclined section bottom plate, connects to the main ore pass, with the connection point being the inclined section penetration opening. A buffer step is constructed on the inclined section bottom plate, and a buffer steel curtain is used to cover the inclined section penetration opening. This scheme increases the height of the vertical section of the branch ore pass and adjusts the well wall angle, making the ore drop point more concentrated and easier to control. Combined with the buffer step, buffer steel curtain, and ore-binding funnel, it can ensure that the ore entering the main ore pass from the branch ore pass will not impact the main ore pass wall, avoiding impact damage to the well wall. However, this scheme has problems such as high construction difficulty and high project cost. Under the long-term impact of large blocks of ore, the buffer layer is prone to falling off, leading to ore pass blockage. Summary of the Invention

[0004] In order to at least solve one of the problems existing in the prior art, the present invention provides a ore and rock filtration and diversion system and construction method in the unloading chamber of the main ore pass. Through the filtration effect of devices such as grids, the system prevents large blocks of ore and rock from forming large blocks of ore and rock from entering the main ore pass and causing large blocks of ore to interlock and arch. The system fundamentally prevents the ore pass blockage problem caused by large blocks of ore and rock interlocking.

[0005] To achieve the objectives of this invention, a ore and rock filtration and diversion system for a main ore pass unloading chamber is provided, comprising an unloading port, an ore and rock collection and hoisting device, a transfer port, and a diversion tunnel. The inclined chute, serving as the connection between the transport roadway and the main ore pass, is located directly below the unloading port. A screen is installed at the unloading port, with one side and end of the screen directly connected to a pedestrian walkway. The ore and rock collection and hoisting device, located on one side of the pedestrian walkway, includes an ore and rock storage rack and a baffle; the transfer port is located at one end of the ore and rock storage rack. A diversion tunnel is provided at one end of the transport roadway, with a screen installed at the entrance, its bottom communicating with the main ore pass opening. Safety railings are installed at both the transfer port and the diversion tunnel entrance.

[0006] Preferably, the grating installed at the unloading port is made of welded I-beams, with a grating length of 6.0 to 11.0 m, an inclination angle of 50° to 70°, and a net spacing between the grating bars of 300 to 400 mm.

[0007] Preferably, the inclined chute has a length of 8.0 to 18.0 m, a width of 4.0 to 6.0 m, and an inclination angle of 40° to 70°. The mined ore and rock bulk is directly unloaded into the main chute through the inclined chute via a grid.

[0008] Preferably, there are two pedestrian walkways, each welded from steel plates with dimensions of 6×0.8m and 6×1.0m respectively. The two walkways are arranged in an L-shape, with one side of the grating connected to one of the walkways and the other side connected to the other. Workers use the walkways to collect and clear scattered rock fragments.

[0009] Preferably, the ore storage rack is made of twisted square steel arranged in a cross pattern and welded together, with a hole spacing of 300-400mm, and is used to collect ore particles larger than 400mm filtered out by the grid.

[0010] Preferably, the baffle is located on one side of the ore storage rack and is made of steel plate with a length of 4.0 to 6.0 m and a height of 5.0 to 6.0 m, to ensure that ore pieces with a size greater than 400 mm can be concentrated and scattered on the ore storage rack.

[0011] Preferably, the length and width of the transfer port opening are both 1.2 to 1.6 m, and the height is 5.0 to 6.0 m. Large pieces of ore collected on the ore storage rack will be transferred to the transport roadway through the transfer port under the operation of the staff.

[0012] Preferably, the diversion channel has an opening length of 3.0–3.6 m, a width of 1.8–2.4 m, a depth of 11.5–14.0 m, and a bottom slope with an inclination angle of 50°–70°, connecting to the main ore pass. The diversion channel is used for hauling away ore and rock fragments after secondary crushing.

[0013] Preferably, the grid screen is installed at the upper opening of the diversion channel and is made of twisted square steel arranged in a cross pattern and welded together, with a hole spacing of 400-500mm, to ensure that the size of the ore blocks slid out of the diversion channel is no more than 400mm.

[0014] Preferably, the main chute is formed using a reverse drilling rig with a diameter of 2 to 4 meters, and the chute inclination angle is 60° to 80°.

[0015] Preferably, the safety railing is made of welded I-beams, with a height of 0.9 to 1.5 m and a net spacing of 300 to 400 mm between railings.

[0016] A construction method for an indoor ore and rock filtration and diversion system in a main ore pass unloading chamber includes the following steps:

[0017] S1: According to the mining design, the main pass shaft is developed using a reverse drilling rig, and the location of the inclined passage is selected and reserved in the area near the main pass shaft opening;

[0018] S2: Using existing mining equipment, excavate and shape the inclined chute in one go, according to the geometric parameters of the inclined chute;

[0019] S3: Install a grating on the upper part of the inclined chute to prevent large pieces of ore from entering the ore pass through the inclined chute. Steel plates are welded to one side and the end of the grating to build a pedestrian passage, which facilitates the movement of workers and the cleaning of scattered ore pieces.

[0020] S4: A rock storage rack is formed by welding twisted square steel in a cross arrangement and placed on one side of the pedestrian passage to collect large pieces of rock filtered out by the grid.

[0021] S5: At the spatial boundary between the transport roadway and the ore storage rack, according to the geometric parameters of the transfer port, the existing mining excavation equipment is used to excavate the transfer port from top to bottom, with the excavation direction perpendicular to the ore storage rack.

[0022] S6: Weld steel to form a baffle on one side of the ore storage rack. One side of the baffle is directly connected to the transfer port to ensure that large pieces of ore can be concentrated and scattered on the ore storage rack.

[0023] S7: At one end of the transport roadway, according to the geometric parameters of the diversion roadway, the existing mining equipment is used to excavate the diversion roadway from top to bottom. The bottom of the diversion roadway is a slope leading to the main chute.

[0024] S8: Install a screen at the entrance of the diversion tunnel to prevent large pieces of ore from falling into the main ore pass through the diversion tunnel;

[0025] S9: Install safety railings at the transfer point and the diversion tunnel entrance to prevent people from falling from heights and ensure the personal safety of the staff.

[0026] Compared with existing technologies, the beneficial effects of the present invention are as follows:

[0027] 1. The ore and rock filtration and diversion system in the main ore pass unloading chamber of the present invention has the characteristics of low material cost, simple process, fast construction speed, and significant economic and safety benefits;

[0028] 2. The materials used for gratings, screens, baffles, ore storage racks, safety railings, and pedestrian walkways are low in cost;

[0029] 3. Inclined chutes, diversion tunnels, and transfer outlets are directly excavated by existing mining equipment according to the design dimensions, which is simple and fast.

[0030] 4. The ore filtration and diversion system filters out large pieces of ore through multiple filtration processes using grids and screens. The ore is then collected and crushed again through ore storage racks and transfer ports to complete the ore diversion. This system can effectively control the size of the ore blocks discharged into the main ore pass, preventing large pieces of ore from being directly discharged into the main ore pass and from colliding with the shaft wall, causing problems such as dents, wear, and wall collapse. This ensures safe and stable ore discharge from the main ore pass over a long period of time.

[0031] 5. The ore filtering and diversion system uses the filtering effect of devices such as grids to prevent large chunks of ore from jamming and forming arches after entering the main ore pass. This system fundamentally prevents ore pass blockage caused by large chunks of ore jamming, which is conducive to efficient and safe mine production. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0033] Figure 1 This is a schematic diagram of the structure of an indoor ore and rock filtration and diversion system in a main ore pass unloading chamber, provided by an embodiment of the present invention.

[0034] Figure 2 This is a side view of the structure of an indoor ore and rock filtration and diversion system in a main ore pass unloading chamber according to an embodiment of the present invention;

[0035] Figure 3 This is a top view of the structure of an indoor ore and rock filtration and diversion system in a main ore pass unloading chamber according to an embodiment of the present invention;

[0036] Figure 4 This is a front view of the structure of an indoor ore and rock filtration and diversion system in a main ore pass unloading chamber according to an embodiment of the present invention.

[0037] Among them: 1-grid; 2-ore storage rack; 3-inclined chute; 4-main chute; 5-transport roadway; 6-pedestrian passage; 7-transfer port; 8-grid screen; 9-diversion mine roadway; 10 safety railing; 11 baffle. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Please see Figure 1 This invention provides a ore and rock filtration and diversion system for a main ore pass unloading chamber, comprising an unloading port, an ore and rock collection and hoisting device, a transfer port 7, and a diversion tunnel 9. For example... Figure 1 As shown, the inclined chute 3 serves as the connection between the transport roadway 5 and the main ore pass 4, located directly below the unloading port. A grid 1 is installed at the unloading port, with one side and end of the grid 1 directly connected to the pedestrian walkway 6. The ore collection and hoisting device is located on one side of the pedestrian walkway 6, including an ore storage rack 2 and a baffle 11. The transfer port 7 is located at one end of the ore storage rack 2, and the baffle 11 is located on one side of the ore storage rack 2. A diversion tunnel 9 is provided at one end of the transport roadway 5, with a screen 8 installed at the opening of the diversion tunnel 9. The bottom of the diversion tunnel 9 communicates with the opening of the main ore pass 4. Safety railings 10 are installed at both the transfer port 7 and the opening of the diversion tunnel 9.

[0040] The grid 1 at the ore unloading port is welded from I-beams. The grid 1 has a length of 6.0–11.0 m, an inclination angle of 50°–70°, and a net spacing between the bars of 300–400 mm, effectively controlling the size of the ore blocks discharged from the ore pass to within 400 mm. Preferably, in some embodiments of the present invention, such as… Figure 2 and Figure 3 As shown, the length of the grid 1 is about 6m, the inclination angle is 50°, and the net spacing between the grid bars is 400mm.

[0041] The inclined chute 3 has a length of 8.0–18.0 m, a width of 4.0–6.0 m, and an inclination angle of 40°–70°. Figure 2 and Figure 4 As shown, the mined ore and rock mass is directly unloaded into the main ore pass 4 through the inclined chute 3 via the grid 1. Preferably, in some embodiments of the present invention, the inclined chute 3 is approximately 8m long, 6m wide, and has an inclination angle of 40°.

[0042] like Figure 3 As shown, there are two pedestrian walkways 6, which are L-shaped. One side of the grille 1 is connected to one of the pedestrian walkways, and the end of the grille 1 is connected to the other pedestrian walkway. The pedestrian walkways 6 are welded from steel plates with a length of 4.0 to 6.0 meters and a width of 0.8 to 1.0 meters. Workers can use the pedestrian walkways 6 to collect and clean up scattered rock fragments. Preferably, in some embodiments of the present invention, the pedestrian walkways 6 are welded from steel plates with dimensions of 6 × 0.8 meters and 6 × 1.0 meters, respectively.

[0043] like Figure 3 As shown, the ore storage rack 2 is constructed by welding twisted square steel bars in a cross arrangement, with a hole spacing of 300-400 mm, to collect ore particles larger than 400 mm filtered out by the grid 1. Preferably, in some embodiments of the present invention, the hole spacing of the ore storage rack 2 is 400 mm.

[0044] like Figure 2 As shown, the baffle 11 is located on one side of the ore storage rack 2. The baffle 11 is welded from steel plates with a length of 4.0 to 6.0 m and a height of 5.0 to 6.0 m, ensuring that ore pieces larger than 400 mm can be concentrated and scattered on the ore storage rack 2. Preferably, in some embodiments of the present invention, the baffle 11 is welded from steel plates with dimensions of 6 × 5.7 m.

[0045] The length and width of the transfer port 7 are both 1.2–1.6 m, and the height is 5.0–6.0 m. Figure 2 and Figure 4 As shown, large pieces of ore collected on the ore storage rack 2 will be transferred to the transport tunnel 6 through the transfer port 7 under the operation of the staff. Preferably, in some embodiments of the present invention, the transfer port 7 has an opening of 1.2 × 1.2 m square and a height of approximately 5.7 m.

[0046] The opening of the diversion tunnel 9 is 3.0–3.6m long and 1.8–2.4m wide, with a depth of 11.5–14.0m. Its bottom is a slope with an angle of 50°–70°, and it connects to the four main ore passes. Figure 2 and Figure 4 As shown, the diversion tunnel 9 is used for sliding ore and rock fragments after secondary crushing. In some embodiments of the present invention, the diversion tunnel 9 is excavated using existing mining equipment. The opening of the diversion tunnel 9 is a 3×2.4m square, with a depth of approximately 11.5m and a bottom slope with an inclination angle of 50°.

[0047] The grid screen 8 is installed at the upper opening of the diversion channel 9, and is made of twisted square steel arranged in a cross pattern and welded together, with a hole spacing of 400-500mm. Figure 3 As shown, the size of the ore blocks discharged from the diversion channel 9 is guaranteed to be no greater than 400 mm. Preferably, in some embodiments of the present invention, the aperture spacing of the screen 8 is 400 mm.

[0048] The main chute 4 is drilled using a raise boring machine with a diameter of 2-4m, and the chute inclination angle is 60°-80°. Preferably, in some embodiments of the present invention, such as... Figure 2 and Figure 3 As shown, the main chute 4 is formed using a 4m diameter reverse drilling rig, and the chute has an inclination angle of 75°.

[0049] The safety railing 10 is welded from I-beams, and its height is 0.9–1.5 m, with a net spacing of 300–400 mm between railings. Preferably, in some embodiments of the present invention, such as Figure 2 and Figure 4 As shown, the height of the safety railing 10 is 0.9m, and the net spacing between the railings is 300mm.

[0050] The specific values ​​given in the above embodiments are just specific examples. In other embodiments, other values ​​can be taken from the given value range as needed.

[0051] The construction method of the ore and rock filtration and diversion system in the main ore pass unloading chamber provided in the foregoing embodiments includes the following steps:

[0052] S1: According to the mining design, the main chute 4 is developed using a reverse drilling rig, and the location of the inclined chute 3 is selected and reserved in the area near the main chute 4 opening.

[0053] S2: Using existing mining equipment, excavate and shape the inclined chute in one go according to the geometric parameters of the inclined chute 3;

[0054] S3: Install a grid 1 on the upper part of the inclined chute 3 to prevent large pieces of ore from entering the ore pass through the inclined chute 3. A pedestrian passage 6 is built by welding steel plates on one side and at the end of the grid 1 to facilitate the movement of workers and the cleaning of scattered ore pieces.

[0055] S4: A rock storage rack 2 is formed by welding twisted square steel in a cross arrangement and is placed on one side of the pedestrian passage 6 to collect large pieces of rock filtered out by the grid 1.

[0056] S5: At the spatial junction of transport roadway 6 and ore storage rack 2, according to the geometric parameters of transfer port 7, use the existing mining excavation equipment to excavate transfer port 7 from top to bottom, with the excavation direction perpendicular to ore storage rack 2.

[0057] S6: Weld a steel plate to one side of the ore storage rack 2 to form a baffle 11. One side of the baffle 11 is directly connected to the transfer port to ensure that large pieces of ore can be concentrated and scattered on the ore storage rack 2.

[0058] S7: At one end of the transport roadway 6, according to the geometric parameters of the diversion roadway 9, the existing mining equipment is used to excavate the diversion roadway 9 from top to bottom. The bottom of the diversion roadway 9 is a slope leading to the main chute 4.

[0059] S8: Install a grid screen 8 at the entrance of the diversion tunnel 9 to prevent large pieces of ore from falling into the main ore pass 4 through the diversion tunnel 9;

[0060] S9: Install safety railings 10 at transfer port 7 and diversion tunnel 9 respectively to prevent personnel from falling from heights and ensure the personal safety of staff.

[0061] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations and simplifications made without departing from the basic principles and ideas of the present invention are equivalent substitutions and are included within the protection scope of the present invention.

Claims

1. A ore and rock filtration and diversion system for the main ore pass unloading chamber, characterized in that, The system includes an unloading port, a rock collection and hoisting device, a transfer port (7), and a diversion tunnel (9). An inclined chute (3), serving as the connecting passage between the transport roadway (5) and the main chute (4), is located below the unloading port. A grid (1) is installed at the unloading port, with one side and end of the grid (1) connected to a pedestrian walkway (6). The rock collection and hoisting device, located on one side of the pedestrian walkway (6), includes a rock storage rack (2) and a baffle (11). The transfer port (7) is located at one end of the rock storage rack (2), and the baffle (11) is located at... On one side of the ore storage rack (2), a diversion tunnel (9) is set at one end of the transport roadway (5). A screen (8) is installed at the top opening of the diversion tunnel (9), and the bottom is connected to the main ore pass (4). Safety railings (10) are set at both the transfer port (7) and the entrance of the diversion tunnel (9). Large pieces of ore collected on the ore storage rack (2) are transferred to the transport roadway (5) through the transfer port. After being crushed twice, the large pieces of ore are filtered by the screen (8) and then enter the main ore pass (4) through the diversion tunnel (9).

2. The ore and rock filtration and diversion system in the main ore pass unloading chamber according to claim 1, characterized in that, The grid (1) is welded from I-beams. The grid (1) has a length of 6.0~11.0m, an inclination angle of 50°~70°, and a net spacing between the grid bars of 300~400mm.

3. The ore and rock filtration and diversion system in the main ore pass unloading chamber according to claim 1, characterized in that, The inclined chute (3) has a length of 8.0~18.0m, a width of 4.0~6.0m, and an inclination angle of 40°~70°. The mined ore and rock bulk is discharged into the main chute (4) through the inclined chute (3) via the grid (1).

4. The ore and rock filtration and diversion system in the main ore pass unloading chamber according to claim 1, characterized in that, The ore storage rack (2) is made of twisted square steel arranged in a cross pattern and welded together, with a hole spacing of 300~400mm, and is used to collect ore with a block size greater than 400mm filtered out by the grid (1).

5. The ore and rock filtration and diversion system in the main ore pass unloading chamber according to claim 1, characterized in that, The baffle (11) is made of steel plate with a length of 4.0~6.0m and a height of 5.0~6.0m, and is used to concentrate and scatter ore and rock with a block size greater than 400mm on the ore and rock storage rack (2).

6. The ore and rock filtration and diversion system in the main ore pass unloading chamber according to claim 1, characterized in that, The length and width of the transfer port (7) are both 1.2~1.6m, and the height is 5.0~6.0m. Large pieces of ore collected on the ore storage rack (2) are transferred to the transport roadway (5) through the transfer port (7).

7. The ore and rock filtration and diversion system in the main ore pass unloading chamber according to claim 1, characterized in that, The diversion tunnel (9) has an opening length of 3.0~3.6m, a width of 1.8~2.4m, a depth of 11.5~14.0m, and a bottom slope with an inclination angle of 50°~70°. It is connected to the main ore pass (4) and is used to chute the ore and rock after secondary crushing.

8. The ore and rock filtration and diversion system in the main ore pass unloading chamber according to claim 1, characterized in that, The grid screen (8) is installed at the upper opening of the diversion channel (9), and is made of twisted square steel arranged in a cross pattern and welded together, with a hole spacing of 400~500mm.

9. The ore and rock filtration and diversion system in the main ore pass unloading chamber according to any one of claims 1-8, characterized in that, The safety guardrail (10) is made of welded I-beams. The height of the safety guardrail (10) is 0.9~1.5m and the net spacing between the guardrails is 300~400mm.

10. A construction method for a ore and rock filtration and diversion system in the main ore pass unloading chamber as described in any one of claims 1-9, characterized in that, Includes the following steps: S1: Use a reverse drilling rig to develop the main chute (4), and select and reserve the location of the inclined chute (3) in the area near the opening of the main chute (4); S2: Using existing mining equipment, a sloping chute is excavated and formed in one go (3); S3: Install a grating (1) on the upper part of the inclined chute (3), and weld a pedestrian walkway (6) on one side and at the end of the grating (1); S4: Place the ore storage rack (2) on one side of the pedestrian passage (6) to collect large pieces of ore filtered out by the grid (1); S5: At the spatial junction of the transport roadway (5) and the ore storage rack (2), the transfer port (7) is excavated from top to bottom using the existing mining excavation equipment, with the excavation direction perpendicular to the ore storage rack (2). S6: Weld a baffle (11) to one side of the ore storage rack (2). The baffle (11) is directly connected to the transfer port to ensure that large pieces of ore can be concentrated and scattered on the ore storage rack (2). S7: At one end of the transport roadway (5), a diversion roadway (9) is excavated from top to bottom using the existing mining equipment. The bottom of the diversion roadway (9) is a slope leading to the main chute (4). S8: Install a screen (8) at the entrance of the diversion tunnel (9) to prevent large pieces of ore from falling into the main ore pass (4) through the diversion tunnel (9); S9: Install safety guardrails (10) at the transfer port (7) and the diversion tunnel (9) respectively.

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