Underground short-process mining, selecting and filling auxiliary system suitable for deep-well large-scale mine

Abstract

The invention provides an underground short-process mining, selecting and filling auxiliary system suitable for a deep-well large-scale mine, and relates to the technical field of underground mining of metal mines, the underground short-process mining, selecting and filling auxiliary system comprises a feeding system, a coarse crushing system, a roughing system and a transfer system; the underground short-process mining, selecting and filling auxiliary system is arranged in a panel interval column near the serious ore dilution; the feeding system transports depleted ore mined from a stope to the coarse crushing system in the panel inter-column; the coarse crushing system is used for crushing the mined depleted ore; the roughing system comprises a rough crushing system, and the roughing system is used for separating waste rocks and ores from the crushed depleted ores; and the transfer system is used for conveying the sorted ore into an ore winze in a panel interval column through a belt conveyor, the ore is conveyed to an ore bin of the main production system from the lower middle section until the ore is conveyed out of the earth surface, and the waste ore fills a nearby goaf through the belt conveyor. The mining, selecting and filling auxiliary system can effectively reduce the ore lifting cost and the ground surface ore dressing load, and is beneficial to reducing the lowest mining grade of an ore deposit.

Description

Technical Field

[0001] The present invention belongs to the technical field of underground mining of metal mines, and in particular relates to an underground short-process mining, dressing and filling auxiliary system and method for deep-well large-scale mines. Background Art

[0002] As shallow metal mineral resources are exhausted, both at home and abroad, a large-scale transition is being made to deep earth resource mining. The construction of large mines at depths of more than one kilometer has become the main trend of future development. However, the occurrence of metal ores is generally complex, and some ore bodies have serious branching and complex phenomena, with many scattered internal stones, which makes it difficult to remove waste rocks during mining and leads to a high ore depletion rate. The conventional underground mining-surface mineral processing model has problems such as high lifting costs and large land occupation of spoil dumps and dressing plants. For large deep underground mines, the above problems caused by depleted ore are more prominent. The integration of underground mining, dressing and filling is an important means to alleviate the shortage of land resources and reduce lifting costs, that is, the mining system, mineral processing system and filling system are all located underground.

[0003] The application of underground mining, selection and filling integrated system is relatively mature in the coal field, and the crushed coal gangue is sorted and filled on site underground. In the field of non-coal mines, due to the relatively complex mineral processing technology, large space requirements, and high construction and maintenance costs of underground mineral processing chambers, there are only small-scale application examples of underground mining, selection and filling integrated system in foreign mines, and it is still in the design and research stage in China. For example, the invention patent "CN118060039A" discloses "a modular mineral processing equipment system suitable for underground mining, selection and filling", which is based on the mining of small thin veins of metal mines and uses containers for modular management of mineral processing equipment. For large-scale deep underground mines, if the entire mineral processing process is placed underground, the construction difficulty and management difficulty of the mining, selection and filling integrated system will increase exponentially.

[0004] Deep large-scale underground metal mines generally adopt mining methods with higher production capacity such as the staged emptying method. The mining field structure parameters are large, and medium-depth holes and deep holes are used for extensive blasting, which leads to the problem of difficulty in separating ore and waste rock in the upper and lower plates of the ore body and in the rock-intervening positions inside the ore body, thereby increasing the lifting and transportation costs of depleted ore and increasing the workload of surface concentrators. At the same time, large mines have a wide mining range, and the locations of depleted ores are scattered and difficult to concentrate. The construction of underground concentrators also has problems such as high costs.

[0005] Therefore, an effective way to reduce the cost of lifting and disposing of waste rock is needed, and an improved technical solution is now provided to address the deficiencies of the above-mentioned existing technologies. Summary of the invention

[0006] The purpose of the present invention is to provide an underground short-process mining and filling auxiliary system and method suitable for deep-well large-scale mines. By sorting the depleted ore in advance underground, most of the waste rock is filled in the goaf nearby, and only the enriched ore is transported to the surface to solve the problem of high waste rock treatment cost.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] An underground short-process mining and filling auxiliary system suitable for deep-well large-scale mines, including a feeding system, a rough crushing system, a roughing system, and a transfer system;

[0009] The underground short-process mining and filling auxiliary system is arranged in the inter-panel column near the serious ore depletion;

[0010] The feeding system transports the depleted ore mined from the stope to the coarse crushing system within the inter-panel column;

[0011] The coarse crushing system crushes the mined depleted ore;

[0012] A roughing system is included, wherein the roughing system separates waste rock and ore from the crushed depleted ore;

[0013] The transfer system transports the sorted ore to the ore chute in the inter-panel column through a belt conveyor, and then transports it from the lower middle section to the ore bin of the main production system until it is transported to the surface. The waste rock is filled into the goaf nearby through a belt conveyor.

[0014] Preferably, the underground short-process mining and filling auxiliary system is suitable for large-scale deep-shaft mines with severe ore depletion, including but not limited to deep and thick ore deposits with branched ore bodies and many interbedded stones.

[0015] Preferably, the underground short-process mining and filling auxiliary system can undertake the underground sorting task of depleted ore in multiple surrounding areas, and one mine can arrange multiple systems according to the distribution of depleted ore, and their equipment can be movable.

[0016] Preferably, the shaft and tunnel engineering of the underground short-process mining and filling auxiliary system mainly includes undepleted ore transportation tunnels, crushing chambers, sorting chambers, sorting waste rock transportation connecting tunnels, sorting ore transportation connecting tunnels and ore chutes, etc., wherein the crushing chambers, sorting chambers, and sorting waste rock transportation connecting tunnels are arranged on the same straight line, and the ore-exit tunnels of the adjacent mined mining areas can be utilized and expanded and reconstructed; the undepleted ore transportation tunnels are arranged in the disk area columns and can be reused with the disk area connecting tunnels; the sorting ore transportation connecting tunnels are excavated along the side walls of the sorting chambers at an angle of 45° to the disk area connecting tunnels, and the ore chute is excavated downward in the sorting ore transportation connecting tunnels, and the ore chute is connected to the main transportation tunnel of the lower middle section.

[0017] Preferably, a spray dust removal device is installed on the top of the crushing chamber and the sorting chamber to reduce the dust produced during the sorting and crushing process and optimize the working environment of the entire system.

[0018] Preferably, the equipment of the crushing system and the roughing system includes a crusher, a belt conveyor, a vibrating screen, and a sorting device, wherein the crusher is arranged in the crushing chamber to crush uneven lumps of stone with a diameter of 300 to 800 mm into those below 350 mm, and the crusher is connected to the vibrating screen at the front end of the sorting device through a belt to realize continuous transportation of the crushed ore to the sorting device; the roughing system adopts one or more methods for sorting according to the difference in properties of the ore and the waste rock, including but not limited to magnetic method, photoelectric method and other sorting methods, and the sorting device is equipped with an ore identification device, a motor and a dust removal device.

[0019] Preferably, the equipment of the transfer system mainly includes a belt conveyor and a vibrating ore discharger, wherein the belt conveyor is used to transport the sorted ore and waste rock to the ore chute and the waste rock fill respectively, and the vibrating ore discharger is arranged below the ore chute to control the ore to be transported to the main production system.

[0020] Preferably, the feeding system is equipped with a shovel loader and a feeder, wherein the shovel loader intermittently transports depleted ore in the surrounding mining area to the feeder, and the feeder serves as a temporary storage of ore, converting intermittent ore supply into stable and continuous ore supply to the roughing system.

[0021] A method for arranging an underground short-process mining and filling auxiliary system suitable for deep-well large-scale mines, comprising the underground short-process mining and filling auxiliary system according to any one of claims 1 to 8, comprising the following steps:

[0022] The first step is to predict the distribution of mining sites with severe ore depletion based on the occurrence of interbedded rock layers in the ore deposit or the blasting drilling ore rock identification technology;

[0023] The second step is to locate the mining and filling auxiliary system based on the reasonable economic transportation distance of the transportation equipment and the location of multiple mining sites with serious ore depletion and the layout of the inter-panel columns in the first step;

[0024] The third step is to dig a panel area connecting tunnel on the central axis of the panel area column to connect the main production tunnels on both sides, and then dig a panel area ore chute with the middle of the connecting tunnel as the free surface to connect with the lower middle section through-vein transport tunnel;

[0025] The fourth step is to expand and transform the mining tunnels adjacent to the mined mining areas of the inter-panel column, and form crushing chambers and sorting chambers in sequence. The angle between the sorting chamber and the ore chute of the pan area and the straight line where the transport tunnel is located is 45° to 60°;

[0026] The fifth step is to dig a sorting ore transport tunnel into the ore chute in the transport tunnel at the corresponding position of the sorting chamber to connect the sorting chamber with the ore chute in the pan area;

[0027] The sixth step is to install a feeder and a crusher in the crushing chamber, and a vibrating screen and a sorting machine in the sorting chamber. The vibrating screen and the crusher are connected by a belt conveyor. The sorting machine is connected to two sets of belt conveyors, one of which is arranged in the sorting ore transport lane, and the other is arranged in the reused ore-exporting lane, which is also used as the sorting waste rock transport lane to transport the waste rock to the goaf to be filled; a vibrating ore discharger is installed at the bottom of the ore chute; a spray dust removal device is installed on the top of the sorting chamber and the crushing chamber;

[0028] The seventh step is to move the mining and filling equipment as a whole to the next mining area after the surrounding depleted waste rock is treated until the entire underground mining is completed.

[0029] Preferably, the underground short-process mining, dressing and filling auxiliary system layout method is suitable for large-scale mines that adopt a disc-type empty field with a bottom structure and subsequent filling method. More specifically, the bottom structure of the mining field consists of a trench, an exit route and an exit tunnel, and the exit tunnel remains intact after the mining of the mining field is completed, providing space for the layout of the mining, dressing and filling auxiliary system.

[0030] The present invention adopts a short process form of mobile rough crushing and rough selection. Compared with the traditional underground mining and filling system, its beneficial effects are as follows:

[0031] (1) The mining and filling auxiliary system can effectively reduce the ore lifting cost and surface ore dressing load, which is conducive to reducing the minimum mineable grade of the ore deposit;

[0032] (2) The crushing, sorting and transportation of depleted ore are all carried out in the mine-exit tunnel of the adjacent mined site or in the ore pillars between the original rock plates, and a spray dust removal device is installed in the chamber, which has little interference with the main production system;

[0033] (3) Using the adjacent mining site’s exit tunnels to arrange sorting equipment and crushing equipment, the engineering excavation volume is smaller, the construction investment cost and equipment investment cost are lower, and it is easier to implement;

[0034] (4) The mining and filling auxiliary system is flexible in layout, the equipment is movable, and the coverage is wide, which can achieve fixed-point sorting in areas with severe ore depletion;

[0035] (5) The space required for the mining and filling auxiliary system is small, and the safety of the chamber is easier to control. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. Among them:

[0037] Figure 1 This is a flow chart of the mining, selection and filling equipment of the present invention;

[0038] Figure 2 It is a plan view of the mining, selection and filling engineering structure of the present invention;

[0039] Figure 3 A longitudinal section view of a mining method I-I suitable for the present invention;

[0040] Figure 4 A longitudinal section II-II of a mining method suitable for the present invention;

[0041] Figure 5 The III-III plan view is a mining method suitable for the present invention.

[0042] In the figure: 1. Scraper; 2. Feeder; 3. Crusher; 4. Belt conveyor; 5. Vibrating screen; 6. Roughing system; 61. Motor; 62. Identification device; 63. Dust removal device; 7. Ore sorting; 8. Waste rock sorting; 9. Ore chute; 10. Waste rock filling shaft; 11. Spray dust removal device; 12. Vein connecting tunnel; 13. Panel area connecting tunnel; 14. Mine exit tunnel; 15. Mine exit approach; 16. Rock drilling horizontal vein tunnel; 17. Panel area column; 18. Rock drilling tunnel; 19. Rock drilling horizontal tunnel; 20. Cutting shaft; 21. Mine collection trench tunnel; 22. Ventilation shaft. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0044] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0045] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0046] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more features.

[0047] In the description of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be internal connection between two elements, indirect connection, or an interactive relationship between two elements.

[0048] In the description of the present invention, a "chamber" refers to a horizontal tunnel with a larger cross-section and a shorter length that does not directly lead to a surface exit.

[0049] The present invention will be described in detail below in conjunction with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0050] The present invention aims at solving the problem that it is difficult to separate ore and waste rock, which increases the lifting and transportation cost of depleted ore and increases the workload of surface concentrators. At the same time, large mines have a wide mining range, and the depleted ores are scattered and difficult to concentrate. The construction of underground concentrators also has the problem of high cost.

[0051] In the present invention, an underground short-process mining and filling auxiliary system suitable for deep well large-scale mines is provided. Figures 1 to 5 , including feeding system, coarse crushing system, coarse selection system6, and transfer system;

[0052] The underground short-process mining and filling auxiliary system is arranged in the inter-panel column 17 near the seriously depleted ore;

[0053] The feeding system transports the depleted ore mined from the stope to the coarse crushing system in the interpanel column 17;

[0054] The coarse crushing system crushes the mined depleted ore;

[0055] It includes a roughing system, which separates waste rock and ore from the crushed depleted ore;

[0056] The transfer system transports the sorted ore to the ore chute 9 in the inter-disk column 17 via the belt conveyor 4, and then transports it from the lower middle section to the ore bin of the main production system until it is transported to the surface. The waste rock is filled into the goaf nearby via the belt conveyor 4.

[0057] Furthermore, the underground short-process mining and filling auxiliary system is suitable for large-scale deep-shaft mines with severe ore depletion, including but not limited to deep and thick ore deposits with scattered ore bodies and many interbedded stones.

[0058] Furthermore, the underground short-process mining and filling auxiliary system can undertake the underground sorting task of depleted ore in multiple surrounding areas, and one mine can arrange multiple systems according to the distribution of depleted ore, and their equipment can be movable.

[0059] Furthermore, the shaft and tunnel engineering of the underground short-process mining and filling auxiliary system mainly includes undepleted ore transportation tunnel, crushing chamber, sorting chamber, sorting waste rock 8 transportation connecting tunnel, sorting ore 7 transportation connecting tunnel and ore chute 9, among which the crushing chamber, sorting chamber, sorting waste rock 8 and transportation connecting tunnel are arranged in the same straight line, and the ore outlet tunnel 14 of the adjacent mined mining area can be utilized and expanded and transformed; the undepleted ore transportation tunnel is arranged in the disk area column 17 and can be reused with the disk area connecting tunnel 13; the sorting ore 7 transportation connecting tunnel is excavated at a 45° angle on the side wall of the sorting chamber to the disk area connecting tunnel 13, and the ore chute 9 is excavated downward in the sorting ore 7 transportation connecting tunnel, and the ore chute 9 is connected to the main transportation tunnel of the lower middle section.

[0060] Furthermore, a spray dust removal device 11 is installed on the top of the crushing chamber and the sorting chamber to reduce the dust produced during the sorting and crushing process and optimize the working environment of the entire system.

[0061] Furthermore, the equipment of the crushing system and the roughing system 6 includes a crusher 3, a belt conveyor 4, a vibrating screen 5, and a sorting device, wherein the crusher 3 is arranged in the crushing chamber to crush uneven lumps of stone with a diameter of 300 to 800 mm into those below 350 mm. The crusher 3 is connected to the vibrating screen 5 at the front end of the sorting device through a belt to realize continuous transportation of the crushed ore to the sorting device; the roughing system 6 adopts one or more methods for sorting according to the difference in the properties of the ore and the waste rock, including but not limited to magnetic method, photoelectric method and other sorting methods, and the sorting device is equipped with an ore identification device 62, a motor 61 and a dust removal device 63.

[0062] Furthermore, the equipment of the transfer system mainly includes a belt conveyor 4 and a vibrating ore discharger, wherein the belt conveyor is used to transport the sorted ore and waste rock to the ore chute 9 and the waste rock filling respectively, and the vibrating ore discharger is arranged under the ore chute 9 to control the ore to be transported to the main production system.

[0063] Furthermore, the feeding system is equipped with a shovel loader 1 and a feeder 2, wherein the shovel loader 1 intermittently transports depleted ore in the surrounding mining area to the feeder 2, and the feeder 2 serves as a temporary storage of ore, converting the intermittent ore supply into a stable and continuous ore supply to the roughing system.

[0064] The following is a detailed description of an underground short-process mining and filling auxiliary system suitable for deep-well large-scale mines according to the present invention through specific embodiments.

[0065] Example 1

[0066] This embodiment is described by taking a large deep well iron mine as an example:

[0067] Reference Figures 1 to 5 The mine has an annual production scale of 10 million tons, a mining depth of more than 1,000m, and adopts a high-stage large-diameter open-pit and subsequent filling mining method. The main ore body is a gently inclined thick ore body with serious branching and compounding. The ore in the upper and lower plates is seriously depleted. There are many scattered stones in the ore body, which are difficult to remove during mining, increasing the degree of depletion. According to the production data of the mine, the average depletion rate of the high-stage stope is 15% to 20%, and it is estimated that the amount of waste rock produced each year is nearly 1 million tons.

[0068] The underground stope structure of the mine is as follows: the ore body is divided into panels, and production is organized with the panels as the mining units. The panel size is 144m×90m, 17 panel columns are arranged between the panels, the width of the ore column is 20m, and the panel area connecting tunnel 13 is arranged in the ore column. The panel is divided along the strike direction, and the stopes are divided vertically in the strike direction. A panel consists of 8 stopes, with a width of 18m, a length of 72m, and a height of 75 to 90m. No top column is left, and the panel is divided into a first-step stope and a second-step stope.

[0069] The bottom structure of the ore exit adopts trench type, and one set of bottom structure of the ore exit is set for every two mining areas. A ore exit joint tunnel 14 is excavated on one side of one of the mining areas to connect the connecting tunnels 12 along the vein on both sides, and an ore exit access 15 is excavated in the ore exit joint tunnel 14 toward the other side of the mining area. The distance between the ore exit accesses is 17m, and the intersection angle between the ore exit access 15 and the ore exit joint tunnel 14 is 45°. A bottom ore collection trench tunnel 21 is excavated in the mining area, and fan-shaped blast holes are drilled in the bottom ore collection trench tunnel 21.

[0070] The top of the stope is rock drilling level, and two rock drilling tunnels 18 are set in each stope, with a spacing of 9m between the rock drilling tunnels, and a rock drilling tunnel 19 is excavated between the rock drilling tunnels. A raise drilling rig is used to excavate and cut the raise 20 to provide a free surface for large-scale blasting, and then vertical and inclined blastholes are drilled in the rock drilling tunnel 18 or the rock drilling tunnel 19.

[0071] In this embodiment, the underground short-process mining and filling auxiliary system includes a feeding system, a coarse crushing system, a rough selection system, and a transfer system, which are arranged in the inter-panel column 17 near the severely depleted ore. The main shaft and tunnel engineering includes an undepleted ore transportation tunnel, a crushing chamber, a sorting chamber, a sorting waste rock transportation connection tunnel, a sorting ore transportation connection tunnel and an ore chute 9, etc., wherein the crushing chamber, the sorting chamber, and the sorting waste rock transportation connection tunnel are arranged on the same straight line, and the ore-exit tunnel 14 of the adjacent mined field can be used and expanded and reconstructed; the undepleted ore transportation tunnel is arranged in the inter-panel column 17, and can be reused with the pan area connection tunnel 13; the sorting ore transportation connection tunnel is excavated along the side wall of the sorting chamber at a 45° angle to the pan area connection tunnel 13, and the ore chute 9 is excavated downward in the sorting ore transportation connection tunnel, and the lower part of the ore chute 9 is connected with the main transportation tunnel of the lower middle section;

[0072] The feeding system is equipped with a loader 1 and a feeder 2. The loader 1 intermittently transports the depleted ore in the surrounding mining area to the feeder 2. The feeder 2 is used as a temporary storage for the depleted ore, and the intermittent ore supply is transformed into a stable and continuous ore supply to the roughing system.

[0073] The equipment of the crushing system and the roughing system includes a crusher 3, a belt conveyor 4, a vibrating screen 5, and a sorting device 6, wherein the crusher 3 is arranged in the crushing chamber to crush uneven lumps of 300 to 800 mm in diameter into lumps of less than 350 mm, and the crusher 3 is connected to the vibrating screen at the front end of the sorting device 6 through a belt to realize the continuous conveyance of the crushed ore to the sorting device 6; the roughing system adopts one or more methods for sorting according to the difference in the properties of the ore and the waste rock, including but not limited to magnetic method, photoelectric method and other sorting methods, and the sorting device is equipped with a motor 61, an ore identification device 62 and a dust removal device 63;

[0074] The equipment of the transfer system mainly includes a belt conveyor 4 and a vibrating ore-discharging machine, wherein the belt conveyor 4 is used to transport the sorted ore 7 and waste rock 8 to the ore chute 9 and the waste rock filling shaft 10 respectively, and the vibrating ore-discharging machine is arranged below the ore chute 10 to control the ore to be transported to the main production system;

[0075] A spray dust removal device 11 is installed on the top of the crushing chamber and the sorting chamber to reduce the dust generated during the sorting and crushing process and optimize the working environment of the entire system.

[0076] In this embodiment, the mining connection tunnel 14 and the panel area connection tunnel 13 of the adjacent mined mining area are utilized to realize the reuse of underground space, which greatly reduces the construction cost of the mining and filling system; the newly added sorting ore transportation connection tunnel and the ore chute 19 can be used as the mining access 15 when the panel area pillar is recovered and the cutting shaft 20 of the lower middle section, respectively, and the reuse rate of the underground space is nearly 100%; the mining and filling equipment involved in the present invention is small in size, the cost of chamber excavation and support is low, and the safety of the chamber is easy to control; in addition, the ore chute 9 in the present invention is also As an unloading channel for non-depleted ore in the surrounding mining areas, the mining approval engineering workload in the mining area is further reduced; the crushing, sorting and transportation of depleted ore are all carried out in the existing tunnels of the mine, and a spray dust removal device 11 is installed in the chamber, which has little interference with the main production system; the mining, dressing and filling auxiliary system of the present invention is flexible in layout, the equipment can be moved, the coverage range is wide, and it can realize fixed-point sorting in areas with severe ore depletion; the mining, dressing and filling auxiliary system of the present invention can effectively reduce the ore lifting cost and surface dressing load, which is beneficial to reducing the minimum mineable grade of the ore deposit.

[0077] Example 2

[0078] This embodiment describes a method for arranging an underground short-process mining and filling auxiliary system suitable for deep-well large-scale mines. Figures 1 to 5 , including the following steps:

[0079] The first step is to predict the distribution of mining sites with severe ore depletion based on the occurrence of interbedded rock layers in the ore deposit or the blasting drilling ore rock identification technology;

[0080] The second step is to locate the mining and filling auxiliary system based on the reasonable economic transportation distance of the transportation equipment and the location of the multiple mining sites with serious ore depletion and the arrangement of the inter-panel pillars 17 in the first step;

[0081] The third step is to excavate a panel area connecting tunnel 13 on the central axis of the panel area column 17 to connect the main production tunnels on both sides, and then excavate a panel area ore chute 9 with the middle of the connecting tunnel as the free surface to connect with the lower middle section through-vein transport tunnel;

[0082] The fourth step is to expand and transform the ore-exit tunnel 14 of the adjacent mining area of ​​the inter-panel column 17, and form a crushing chamber and a sorting chamber in sequence, wherein the angle between the connecting line of the sorting chamber and the pan area ore chute 9 and the straight line where the transport tunnel is located is 45° to 60°;

[0083] The fifth step is to dig a sorting ore 7 transport lane at the corresponding position of the sorting chamber to the ore chute 9 in the transport lane, connecting the sorting chamber and the ore chute 9 in the pan area;

[0084] The sixth step is to install a feeder 2 and a crusher 3 in the crushing chamber, and install a vibrating screen 5 and a sorting machine in the sorting chamber. The vibrating screen 5 and the crusher 3 are connected by a belt conveyor 4. The sorting machine is connected to two sets of belt conveyors 4, one of which is arranged in the sorting ore 7 transportation lane, and the other is arranged in the reused mining lane 14, which is also used as the sorting waste rock 8 transportation lane to transport the waste rock to the goaf to be filled; a vibrating ore discharger is installed at the bottom of the ore chute 9; a spray dust removal device 11 is installed on the top of the sorting chamber and the crushing chamber;

[0085] The seventh step is to move the mining and filling equipment as a whole to the next mining area after the surrounding depleted waste rock is treated until the entire underground mining is completed.

[0086] Preferably, the underground short-process mining, dressing and filling auxiliary system layout method is suitable for large-scale mines that adopt the pan-area empty field subsequent filling method with a bottom structure. More specifically, the bottom structure of the mining field is composed of a mining trench tunnel 21, a mining access road 15 and a mining connection tunnel 14, and the mining connection tunnel 14 remains intact after the mining of the mining field is completed, providing space for the layout of the mining, dressing and filling auxiliary system.

[0087] In summary:

[0088] The present invention utilizes the ore-discharging connecting tunnel 12 and the disk area connecting tunnel 13 of the adjacent mined mining areas to realize the reuse of underground space, greatly reducing the construction cost of the mining, dressing and filling system; the newly added sorting ore transportation connecting tunnel and ore chute 19 can be used as the ore-discharging access route when the disk area pillars are recovered and the cutting shaft of the lower middle section, respectively, and the reuse rate of the underground space is nearly 100%; in addition, the ore chute 9 in the present invention is also used as an unloading channel for non-depleted ore in the surrounding mining areas, further reducing the construction cost of the mining area; the mining, dressing and filling auxiliary system of the present invention can effectively reduce the ore lifting cost and surface dressing load, which is beneficial to reducing the minimum mineable grade of the ore deposit.

[0089] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An underground short-process mining and filling auxiliary system suitable for deep-well large-scale mines, characterized in that: Including feeding system, coarse crushing system, rough selection system and transfer system; The underground short-process mining and filling auxiliary system is arranged in the inter-panel column near the serious ore depletion; The feeding system transports the depleted ore mined from the stope to the coarse crushing system within the inter-panel column; The coarse crushing system crushes the mined depleted ore; A roughing system is included, wherein the roughing system separates waste rock and ore from the crushed depleted ore; The transfer system transports the sorted ore to the ore chute in the inter-panel column through a belt conveyor, and then transports it from the lower middle section to the ore bin of the main production system until it is transported to the surface. The waste rock is filled into the goaf nearby through a belt conveyor.

2. According to claim 1, an underground short-process mining and filling auxiliary system suitable for deep-well large-scale mines is characterized in that: The underground short-process mining, dressing and filling auxiliary system is suitable for large-scale deep-shaft mines with serious ore depletion. The large-scale deep-shaft mines with serious ore depletion include but are not limited to deep and thick ore deposits with branched ore bodies and many interbedded stones.

3. According to claim 1, an underground short-process mining and filling auxiliary system suitable for deep-well large-scale mines is characterized in that: The underground short-process mining and filling auxiliary system can undertake the underground sorting task of depleted ore in multiple surrounding areas, and a mine can be equipped with multiple systems according to the distribution of depleted ore, and its equipment can be movable.

4. According to claim 1, an underground short-process mining and filling auxiliary system suitable for deep-well large-scale mines is characterized in that: The shaft and tunnel engineering of the underground short-process mining and filling auxiliary system mainly includes undepleted ore transportation tunnel, crushing chamber, sorting chamber, sorting waste rock transportation connecting tunnel, sorting ore transportation connecting tunnel and ore chute, among which the crushing chamber, sorting chamber and sorting waste rock transportation connecting tunnel are arranged on the same straight line, and the ore-exit tunnel of the adjacent mined mining area can be utilized and expanded and reconstructed; the undepleted ore transportation tunnel is arranged in the disk area column and can be reused with the disk area connecting tunnel; the sorting ore transportation connecting tunnel is excavated at a 45° angle from the side wall of the sorting chamber to the disk area connecting tunnel, and an ore chute is excavated downward in the sorting ore transportation connecting tunnel, and the ore chute is connected to the main transportation tunnel of the lower middle section below.

5. According to claim 4, an underground short-process mining and filling auxiliary system suitable for deep-well large-scale mines is characterized in that: A spray dust removal device is installed on the top of the crushing chamber and the sorting chamber to reduce the dust produced during the sorting and crushing process and optimize the working environment of the entire system.

6. According to claim 2, an underground short-process mining and filling auxiliary system suitable for deep-well large-scale mines is characterized in that: The equipment of the crushing system and roughing system includes a crusher, a belt conveyor, a vibrating screen, and a sorting device, wherein the crusher is arranged in the crushing chamber to crush uneven lumps of stone with a diameter of 300 to 800 mm into those below 350 mm. The crusher is connected to the vibrating screen at the front end of the sorting device through a belt to realize continuous transportation of the crushed ore to the sorting device. The roughing system adopts one or more methods for sorting according to the difference in the properties of the ore and the waste rock, including but not limited to magnetic method, photoelectric method and other sorting methods. The sorting device is equipped with an ore identification device, a motor and a dust removal device.

7. According to claim 1, an underground short-process mining and filling auxiliary system suitable for deep-well large-scale mines is characterized in that: The equipment of the transfer system mainly includes belt conveyors and vibrating ore dischargers, wherein the belt conveyors are used to transport the sorted ore and waste rock to the ore chute and waste rock filling respectively, and the vibrating ore discharger is arranged under the ore chute to control the ore to be transported to the main production system.

8. According to claim 1, an underground short-process mining and filling auxiliary system suitable for deep-well large-scale mines is characterized in that: The equipment of the feeding system includes a shovel loader and a feeder, wherein the shovel loader intermittently transports the depleted ore in the surrounding mining area to the feeder, and the feeder serves as a temporary storage of ore, converting the intermittent ore supply into a stable and continuous ore supply to the roughing system.

9. A method for arranging an underground short-process mining and filling auxiliary system suitable for deep-well large-scale mines, comprising the underground short-process mining and filling auxiliary system according to any one of claims 1 to 8, characterized in that: The following steps are involved: The first step is to predict the distribution of mining sites with severe ore depletion based on the occurrence of interbedded rock layers in the ore deposit or the blasting drilling ore rock identification technology; The second step is to locate the mining and filling auxiliary system based on the reasonable economic transportation distance of the transportation equipment and the location of multiple mining sites with serious ore depletion and the layout of the inter-panel columns in the first step; The third step is to dig a panel area connecting tunnel on the central axis of the panel area column to connect the main production tunnels on both sides, and then dig a panel area ore chute with the middle of the connecting tunnel as the free surface to connect with the lower middle section through-vein transport tunnel; The fourth step is to expand and transform the mining tunnels adjacent to the mined mining areas of the inter-panel column, and form crushing chambers and sorting chambers in sequence. The angle between the sorting chamber and the ore chute of the pan area and the straight line where the transport tunnel is located is 45° to 60°; The fifth step is to dig a sorting ore transport tunnel into the ore chute in the transport tunnel at the corresponding position of the sorting chamber to connect the sorting chamber with the ore chute in the pan area; The sixth step is to install a feeder and a crusher in the crushing chamber, and a vibrating screen and a sorting machine in the sorting chamber. The vibrating screen and the crusher are connected by a belt conveyor. The sorting machine is connected to two sets of belt conveyors, one of which is arranged in the sorting ore transport lane, and the other is arranged in the reused ore-exporting lane, which is also used as the sorting waste rock transport lane to transport the waste rock to the goaf to be filled; a vibrating ore discharger is installed at the bottom of the ore chute; a spray dust removal device is installed on the top of the sorting chamber and the crushing chamber; The seventh step is to move the mining and filling equipment as a whole to the next mining area after the surrounding depleted waste rock is treated until the entire underground mining is completed.

10. The method for arranging an underground short-process mining and filling auxiliary system suitable for deep-well large-scale mines according to claim 9 is characterized in that: The underground short-process mining, dressing and filling auxiliary system layout method is suitable for large-scale mines that adopt a plate-type empty field with a bottom structure and subsequent filling method. More specifically, the bottom structure of the mine is composed of a trench, an exit access road and an exit connecting tunnel, and the exit connecting tunnel remains intact after the mine is mined, providing space for the layout of the mining, dressing and filling auxiliary system.

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