A multi-section multi-surface r-type chute structure for underground mines

Abstract

The utility model discloses a kind of underground mine multi-section multi-face r type chute structure, including multiple sections, at least three chute gangways that communicate with transport roadway are laid out in each section outside ore body, center chute mouth and side chute mouth are equipped in chute gangway, center chute mouth is mutually communicated to form the main chute that penetrates all sections, each side chute mouth is communicated with main chute to form multiple "r" letter type ore unloading unit by one inclined angle 50~70 ° inclined chute;The side chute mouth of adjacent section is arranged in horizontal staggered, and the side chute mouth of same section is staggered arrangement around center chute mouth;The bottom of main chute is equipped with only ore drawing point and vibration ore drawing machine.The utility model is through the chute structure that penetrates multiple sections is laid out outside ore body, and main chute and each section inclined chute cooperate to form multiple independent ore unloading unit, far away from goaf, do not interfere with filling operation and each section synchronous operation, with operation continuity is strong, ore storage capacity is big, impact resistance is enhanced, and ore output efficiency higher characteristics.

Description

Technical Field

[0001] This utility model belongs to the field of mining technology, and specifically relates to a multi-segmented, multi-faceted R-shaped chute structure for underground mines. Background Technology

[0002] In the process of underground mining, the ore pass is a key facility for ore transfer and is known as the "throat" of the mine. Traditional ore pass layout typically uses a single vertical ore pass, which presents several application problems: First, it has a small ore storage capacity. A single vertical ore pass usually corresponds to a single vibratory feeder. Taking a section height of 15m as an example, the ore pass is full as soon as the loader unloads, resulting in a small ore storage capacity, long waiting time for ore cars, low transportation efficiency, and difficulty in meeting the ore output needs of large mines. Second, the angle of the vertical ore pass is close to 90°, with a large vertical drop. The impact force of the falling ore on the shaft wall and the feeder at the bottom is large, leading to problems such as shaft deformation, shaft wall collapse, and serious equipment damage. Third, it has poor layout flexibility. Especially in stopes using large-diameter deep-hole backfilling mining methods, the layout of the ore pass in the stope will cause difficulties in the later backfilling process. On the other hand, setting up multiple vertical ore passes will significantly increase costs, with the related equipment and installation costs for each vertical ore pass approaching 330,000 yuan. Fourth, the ore unloading efficiency is low. A single vertical ore pass cannot meet the needs of simultaneous ore output from multiple sections. Ore output operations in different sections interfere with each other, limiting the system's ore output capacity. Utility Model Content

[0003] The purpose of this utility model is to propose a multi-segment, multi-face R-shaped chute structure for underground mines, in order to solve the problems of small ore storage capacity, large impact damage, and difficulty in multi-segment operation of existing traditional straight chute layouts, which cannot effectively meet the production needs of large-scale mines.

[0004] This utility model is achieved through the following technical solution:

[0005] This utility model proposes a multi-segment, multi-faceted R-shaped ore pass structure for underground mines, comprising: dividing the ore body into multiple segments along its vertical direction, each segment having an upper hanging wall haulage roadway and a lower hanging wall haulage roadway; each segment having at least three connecting ore pass roadways outside the ore body, the connecting ore pass roadways being connected to either the upper hanging wall haulage roadway or the lower hanging wall haulage roadway; each connecting ore pass roadway having an ore pass opening, the ore pass openings being divided into a central ore pass opening and side ore pass openings according to their relative positions within the connecting ore pass roadway, the central ore pass openings being interconnected to form a main ore pass running through all segments, each side ore pass opening being connected to the main ore pass through an inclined ore pass with an inclination angle of 50° to 70°, forming multiple independent "r"-shaped unloading units within each segment; the side ore pass openings of adjacent segments being staggered on the horizontal projection plane, the side ore pass openings of the same segment being staggered around the central ore pass opening; a unique ore discharge point being provided at the bottom of the main ore pass, at which a vibrating ore discharge machine is installed.

[0006] Based on the above technical solutions, by arranging the ore pass structure outside the ore body and connecting the upper and lower haulage roadways through the ore pass connecting roadway, it is far away from the goaf and does not affect subsequent backfilling operations and synchronous unloading operations of other sections. Moreover, the shovel and transport equipment can transport in a straight line, making unloading convenient and effectively improving unloading efficiency and safety, which is particularly suitable for subsequent backfilling methods. At the same time, by cooperating with the main ore pass and multiple inclined ore passes, multiple sections can unload and store ore simultaneously, replacing the traditional method of setting up multiple straight ore passes and ore discharge machines. This effectively improves the ore storage capacity of the ore pass and the system's ore output capacity, significantly reduces the waiting time of ore cars, and the setting of a single ore discharge machine at the bottom of the main ore pass effectively saves equipment investment and maintenance costs, significantly improving the economic benefits of mining enterprises.

[0007] Preferably, the inclination angle of the inclined chute is 55-65°, so that the inclined chute can maintain a certain slope for smooth ore unloading, while also having a large ore storage capacity.

[0008] Preferably, the central chute openings of adjacent segments are staggered on the horizontal projection plane, with the staggered width not less than the diameter of the main chute. The central chute opening of each segment forms the main chute of that segment vertically downwards. The main chute openings of adjacent segments are interconnected through a transition platform, and the central chute openings are located within the transition platform. This design achieves layered buffer unloading through the segmented design of the main chute, which can effectively avoid the huge impact on the bottom layer caused by the large height difference during unloading of high segments. This not only easily damages the chute wall and the bottom ore discharge machine, but also easily leads to the over-crushing of the bottom ore, affecting the quality of the ore.

[0009] Preferably, the diameter of the main ore pass gradually increases from the high section to the bottom section, so as to gradually increase the ore throughput of the main ore pass and avoid the ore from accumulating and stagnating in the main ore pass and being unloaded in sections.

[0010] Preferably, the connection ports of the inclined chute and the main chute are staggered relative to the axial direction of the main chute, and the stagger height of adjacent connection ports is not less than 2m, so as to avoid the connection ports being damaged by the impact of ore during unloading, which would cause the inclined chute to collapse and make it impossible to unload ore effectively.

[0011] Preferably, the connection between the inclined ore chute and the main ore chute is provided with a concave arc-shaped transition section, the length of which is not less than the radius of the inclined ore chute. This design utilizes the buffering effect of the arc-shaped transition section to mitigate the inertial impact force of the ore sliding down a steep slope, enabling it to enter the main ore chute at a relatively slow speed, thereby reducing the impact on the main ore chute wall and preventing the main ore chute from collapsing or even being damaged.

[0012] Preferably, the connecting roadway of the ore pass is also connected to a branch connecting roadway, and an auxiliary ore pass opening is provided on the branch connecting roadway. The auxiliary ore pass opening is connected to the inclined ore pass through the branch ore pass. The inclination angle of the branch ore pass is 47-55°, so as to further improve the unloading capacity of each section, expand the ore storage capacity of the ore pass, and reduce the impact force of ore in the inclined ore pass with a large inclination angle.

[0013] Preferably, the bottom of the main ore pass is provided with a buffer expansion chamber, and the ore discharge point is located at the bottom of the buffer expansion chamber.

[0014] Preferably, a buffer layer of ore 3 to 5 meters thick is piled up above the vibratory ore feeder to better protect the vibratory ore feeder.

[0015] Preferably, each of the ore chutes is equipped with a detachable grid screen made of round steel with a screen size of 700mm×700mm. This design is used to screen ore of appropriate size during unloading, to prevent large ore from directly entering the inclined ore chute and main ore chute, which would increase the probability of ore chute wall damage, and to prevent the ore discharge port of the vibrating ore discharger from becoming blocked, thus preventing the ore from being discharged smoothly.

[0016] Beneficial effects

[0017] Compared with the existing chute layout structure, this utility model has the following advantages or beneficial effects:

[0018] (1) Strong continuity of ore unloading operation: By setting up the ore pass structure outside the ore body and connecting the upper and lower transport roadways through the ore pass connecting roadway, it is far away from the goaf area. It does not affect the subsequent backfilling operation and the synchronous ore unloading operation of other sections. It also allows the shovel and transport equipment to transport in a straight line, making ore unloading convenient and effectively ensuring the continuity of ore unloading operation. It is conducive to improving ore unloading efficiency and safety, and is especially suitable for the large-diameter deep hole subsequent backfilling method.

[0019] (2) Large ore storage capacity: Through the coordinated design of a main ore pass and multiple inclined ore passes in each section, multiple "r"-shaped ore unloading units are formed in each section, and the combination of branch ore passes, buffer expansion bins and other structures transforms the traditional "point" ore storage of straight ore passes into "line and surface combined" ore storage, increasing the ore storage capacity by at least 3 to 5 times and significantly reducing the waiting time of ore cars.

[0020] (3) Enhanced impact resistance: The inclined chute design with an inclination angle of 50 to 70° and the branch chute design with an inclination angle of 47 to 55° allow the ore to slide smoothly down the inclined surface while significantly reducing the impact force by more than 60%; and the staggered design of the connection between the inclined chute and the main chute and the arc transition section design further slow down the ore falling speed and effectively extend the service life of the well wall and the ore feeding machine.

[0021] (4) High ore extraction efficiency: Multiple inclined chute shafts are independently set up in each section, and each section can carry out ore unloading operations at the same time without interfering with each other. The ore extraction capacity of the system is multiplied, effectively saving ore extraction time and improving the overall ore unloading efficiency. Attached Figure Description

[0022] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of a horizontal plane in Embodiment 1 of this utility model. Figure 1 ;

[0024] Figure 2 This is a schematic diagram of a horizontal plane in Embodiment 1 of this utility model. Figure 2 ;

[0025] Figure 3 This is a longitudinal cross-sectional view of Embodiment 1 of the present invention. Figure 1 ;

[0026] Figure 4 This is a longitudinal cross-sectional view of Embodiment 1 of the present invention. Figure 2 ;

[0027] Figure 5 This is a longitudinal cross-sectional view of Embodiment 1 of the present invention. Figure 3 ;

[0028] Figure 6 For the present utility model Figure 5 An enlarged schematic diagram of part A in the middle;

[0029] Figure 7 This is a horizontal planar schematic diagram of Embodiment 2 of this utility model;

[0030] Figure 8 This is a schematic diagram of a longitudinal section of a certain segment of Embodiment 2 of this utility model;

[0031] In the diagram: ore body 1; section 2; hanging wall transport roadway 201; footwall transport roadway 202; ore pass connecting roadway 3; branch connecting roadway 301; ore pass opening 4; central ore pass opening 401; side ore pass opening 402; auxiliary ore pass opening 403; main ore pass 5; inclined ore pass 6; connecting opening 601; arc-shaped transition section 602; branch ore pass 7; transition platform 8; screen 9; buffer expansion chamber 10; buffer ore layer 11. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the embodiments, but the implementation of the present invention is not limited thereto.

[0033] Example 1

[0034] This embodiment provides a multi-segmented, multi-faceted R-shaped chute structure for underground mines, such as... Figure 1 As shown, the ore body 1 is divided into multiple segments 2 along its vertical direction. Each segment 2 has an upper hanging wall haulage roadway 201 and a lower hanging wall haulage roadway 202. Each segment 2 has at least three connecting ore passes 3 outside the ore body 1, which are connected to the upper hanging wall haulage roadway 201 or the lower hanging wall haulage roadway 202. Each connecting ore pass 3 has a ore pass opening 4, which is divided into a central ore pass opening 401 and a side ore pass opening 402 according to its relative position in the connecting ore pass 3. The central ore pass openings 401 are interconnected to form a through ore pass opening that runs through all segments 1. In section 2, the main ore pass 5 is connected to each of the side ore pass openings 402 via an inclined ore pass 6 with an inclination angle of 50° to 70°, forming multiple independent "r"-shaped unloading units within each section 2. The side ore pass openings 402 of adjacent sections 2 are staggered on the horizontal projection plane, and the side ore pass openings 402 of the same section 2 are staggered around the central ore pass opening 401. The bottom of the main ore pass 5 is provided with a unique ore discharge point (not shown in the attached figure), at which a vibrating ore discharge machine (not shown in the attached figure) is installed.

[0035] The inclined angle of the inclined chute 6 is preferably 55-65°, so that the inclined chute 6 can maintain a certain slope for smooth ore unloading, while also having a large ore storage capacity.

[0036] The arrangement of the connecting chute 3, the central chute opening 401, and the side chute opening 402 can have various structures, specifically: such as Figure 1 or Figure 2 As shown, the chute connecting lane 3 is located near the lower transport lane 202, and has an odd number of three or more lanes. The central chute opening 401 is located in the middle of the chute connecting lane 3, and the side chute openings 402 are located in the two side chute connecting lanes 3, and are staggered relative to the central chute opening 401, so that the main chute 5 and the inclined chute 6 do not interfere with each other.

[0037] The main chute 5 can be arranged in various ways: such as Figure 3 As shown, the central chute openings 401 of adjacent segments 2 coincide on the horizontal projection plane, and the main chute 5 directly penetrates all segments 2 to form a vertical structure of equal diameter, or as shown in the figure. Figure 4 As shown, the central chute openings 401 of adjacent segments 2 coincide at the center of the horizontal projection plane. The main chute 5 directly penetrates all segments 2, but forms a funnel-shaped structure with the aperture gradually increasing from the high segment 2 to the bottom segment 2, so as to gradually increase the ore throughput of the main chute 5 and avoid the ore from accumulating and stagnating in the main chute 5, thus affecting the unloading of ore in segment 2; most preferably, as Figure 5As shown, the central chute openings 401 of adjacent segments 2 are staggered on the horizontal projection plane. The staggered width is not less than the diameter of the main chute 5. For example, if a main chute 5 with a diameter of 4 meters is used, the horizontal staggered width of the central chute openings 401 is more than 4 meters. The central chute openings 401 of each segment 2 form the main chute 5 of that segment 2 vertically downward. The main chute 5s of adjacent segments 2 are interconnected through a transition platform 8. The central chute openings 401 are arranged within the transition platform 8. This arrangement utilizes the segmented design of the main chute 5 2 to achieve layered buffer unloading, which can effectively avoid the huge impact caused by the large height difference when unloading ore in the high segment 2, effectively protect the chute wall and avoid over-crushing of the ore.

[0038] The 4th ore pass is equipped with a detachable steel screen 9 with a mesh size of 700mm×700mm to screen ore of appropriate size during unloading, so as to prevent large ore from directly entering the inclined ore pass 6 and the main ore pass 5 and increasing the probability of ore pass wall damage.

[0039] Furthermore, a buffer expansion chamber 10 is provided at the bottom of the main ore pass 5 to increase the ore storage capacity of the ore pass and reduce the ore accumulation height in the main ore pass 5. The ore discharge point is located at the bottom of the buffer expansion chamber 10. A buffer ore layer 11 with a thickness of 3 to 5 meters is piled up above the vibrating ore discharge machine to better protect the vibrating ore discharge machine.

[0040] Furthermore, referring to Figures 3-5 The connection port 601 between the inclined chute 6 and the main chute 5 is offset relative to the axis of the main chute 5, and the offset height of adjacent connection ports 601 is not less than 2m, so as to avoid the connection port 601 being damaged by the impact of ore during unloading, which would cause the inclined chute 6 to collapse and make it impossible to unload ore effectively.

[0041] Preferred, such as Figure 6 As shown, a concave arc-shaped transition section 602 is provided at the connection between the inclined chute 6 and the main chute 5. The arc length is not less than the radius of the inclined chute 6 to buffer the inertial impact force of the ore sliding down the steep slope, so that the ore enters the main chute 5 at a relatively slow speed, thereby reducing the impact on the wall of the main chute 5 and preventing the main chute 5 from collapsing or even being damaged.

[0042] Example 2

[0043] like Figure 7 , Figure 8 As shown, this embodiment provides a multi-segmented, multi-faceted R-shaped chute structure for underground mines, which differs from Embodiment 1 in that:

[0044] The connecting lane 3 of the chute is also connected to a branch connecting lane 301. The branch connecting lane 301 can be set up independently relative to each connecting lane 3, or it can be set up to connect all the connecting lanes 3 of the chute. The branch connecting lane 301 is provided with an auxiliary chute opening 403. The auxiliary chute opening 403 is connected to the inclined chute 6 through a branch chute 7. The inclination angle of the branch chute 7 is 47-55°.

[0045] The advantage of this embodiment is that it can further improve the unloading capacity of each section 2, expand the ore storage capacity of the ore pass, and reduce the ore impact force in the inclined ore pass 6 with a large inclination angle.

[0046] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A multi-segmented, multi-faceted r-shaped chute structure for underground mines, comprising: The ore body is divided into multiple sections along its vertical direction, and each section is equipped with an upper haulage roadway and a lower haulage roadway; its characteristic is that... Each section has at least three connecting ore passes outside the ore body, which are connected to the hanging wall transport roadway or the footwall transport roadway. Each ore pass is equipped with an ore pass opening. The ore pass openings are divided into central ore pass openings and side ore pass openings according to their relative positions in the ore pass passage. The central ore pass openings are interconnected to form a main ore pass that runs through all sections. Each side ore pass opening is connected to the main ore pass through an inclined ore pass with an inclination angle of 50 to 70 degrees. In each section, multiple independent "r"-shaped unloading units are formed. The side chute openings of adjacent segments are staggered on the horizontal projection plane, and the side chute openings in the same segment are staggered around the central chute opening. The bottom of the main ore pass has a single ore discharge point, at which a vibrating ore discharge machine is installed.

2. The multi-segmented, multi-faceted r-shaped chute structure for underground mines according to claim 1, characterized in that, The inclination angle of the inclined shaft is 55-65°.

3. The multi-segmented, multi-faceted r-shaped chute structure for underground mines according to claim 1, characterized in that, The central chute openings of adjacent segments are staggered on the horizontal projection plane, and the staggered width is not less than the diameter of the main chute. The central chute opening of each segment forms the main chute of that segment vertically downward. The main chute openings of adjacent segments are interconnected through a transition platform, and the central chute openings are located within the transition platform.

4. A multi-segmented, multi-faceted r-shaped chute structure for underground mines according to claim 1 or 2, characterized in that, The diameter of the main chute gradually increases from the high section to the bottom section.

5. The multi-segmented, multi-faceted r-shaped chute structure for underground mines according to claim 1, characterized in that, The connection openings of the inclined chute and the main chute are offset relative to the axis of the main chute, and the offset height between adjacent connection openings is not less than 2m.

6. The multi-segmented, multi-faceted r-shaped chute structure for underground mines according to claim 1, characterized in that, The connection between the inclined chute and the main chute is provided with a concave arc-shaped transition section, the length of which is not less than the radius of the inclined chute.

7. The multi-segmented, multi-faceted r-shaped chute structure for underground mines according to claim 1, characterized in that, The connecting roadway of the chute is also connected to a branch connecting roadway, and an auxiliary chute opening is provided on the branch connecting roadway. The auxiliary chute opening is connected to the inclined chute through the branch chute, and the inclination angle of the branch chute is 47-55°.

8. The multi-segmented, multi-faceted r-shaped chute structure for underground mines according to claim 1, characterized in that, The main ore pass is equipped with a buffer expansion chamber at the bottom, and the ore discharge point is located at the bottom of the buffer expansion chamber.

9. The multi-segmented, multi-faceted r-shaped chute structure for underground mines according to claim 1, characterized in that, A buffer ore layer 3 to 5 meters thick is piled up above the vibratory ore feeder.

10. A multi-segmented, multi-faceted r-shaped chute structure for underground mines according to claim 1, characterized in that, Each wellhead is equipped with a detachable screen made of round steel, with a screen size of 700mm×700mm.

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