Underground short-process mining, selecting and filling chamber space recycling method

Abstract

The invention provides an underground short-process mining, selecting and filling chamber space recycling method, which relates to the technical field of underground mining, and comprises the following steps: recycling an ore removal combined roadway of a mined stope, arranging a crushing chamber, a sorting chamber and a sorting waste rock transportation connection roadway in a roadway, and expanding and supporting the roadway or the chambers according to the size of equipment; a separated ore transportation connection roadway is excavated on the side wall of the separation chamber along the oblique angle direction panel connection roadway, an ore winze is excavated downwards in the separated ore transportation connection roadway, and the lower portion of the ore winze is communicated with a main transportation roadway of the lower middle section; and the panel connection roadway is repeatedly utilized to serve as an undepleted ore transportation roadway of a surrounding stope. According to the method, the arrangement of the short-process mining, selecting and filling well and lane engineering and the surrounding stope stoping and panel inter-column stoping technology are combined, the related well and lane engineering is repeatedly utilized for more than two times, and the cost of short-process mining, selecting and filling system construction and panel mining and cutting engineering is further reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of underground mining, and in particular relates to a method for reusing the space of an underground short-process mining and filling chamber. 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 beneficiation process, large space requirements, and high construction and maintenance costs of underground beneficiation 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 disclosed invention patent "A modular beneficiation equipment system suitable for underground mining, selection and filling" is based on the mining of small-scale thin veins of metal mines, and uses containers to manage the beneficiation equipment in a modular manner. For large-scale deep underground mines, if the entire beneficiation process is placed underground, the construction difficulty and management difficulty of the mining, selection and filling integrated system will increase multiplied. When mining resources in large-scale deep-buried mines, reducing the cost of lifting and disposal of waste rock is the main research direction.

[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-deep 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 walls of the ore body and in the rock-interposed 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. Therefore, it is extremely important to develop methods and methods for the reuse of space in underground short-process mining and filling chambers, and to reuse the space of mining and filling auxiliary system chambers to reduce construction costs.

[0005] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Summary of the invention

[0006] The object of the present invention is to provide a method for recycling the space of an underground short-process mining and filling chamber, so as to solve the problems of low utilization rate of the chamber space and high cost of panel mining and cutting projects.

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

[0008] A method for recycling space of an underground short-process mining and filling chamber comprises the following steps:

[0009] The first step is to divide the ore body into panels, organize production with the panels as the mining units, arrange panel columns between the panels, and arrange the panel connection tunnels in the panel columns; divide the panel into an even number of stopes to ensure that there are mine-exit connection tunnels on both sides of the adjacent panel columns;

[0010] In the second step, the mining structure of the mining area adopts trench type, and a mining bottom structure is set up for every two mining areas; a mining joint tunnel is excavated on one side of one of the mining areas to connect the connecting tunnels along the vein on both sides, and a mining access road is excavated in the mining joint tunnel towards the other side of the mining area;

[0011] In the third step, the top of the stope is horizontal for rock drilling. Two rock drilling tunnels are set up in each stope, and rock cross tunnels are dug between the rock drilling tunnels. A raise drilling rig is used to dig and cut the raise to provide a free surface for large-area deep hole blasting.

[0012] The fourth step is to give priority to mining the stopes on both sides of the disk area. After mining, a filling retaining wall is set up in the bottom ore exit access road, and then the stope is filled with cemented filling body;

[0013] The fifth step is to reuse the mining tunnels of the mined areas, arrange crushing chambers, sorting chambers and sorting waste rock transportation tunnels in the tunnels, and expand and support the tunnels or chambers according to the size of the equipment;

[0014] Step 6: excavate a sorting ore transportation connection tunnel along the oblique angle from the side wall of the sorting chamber to the disk area connection tunnel, and excavate an ore chute downward in the sorting ore transportation connection tunnel. The lower part of the ore chute is connected with the main transportation tunnel in the lower middle section;

[0015] Step 7: Reuse the panel area connecting tunnel as the non-depleted ore transportation tunnel for the surrounding mining areas;

[0016] Step 8. After the surrounding depleted waste rock is treated, the mining and filling equipment will be moved as a whole to the next plate area, and steps 4 to 8 will be repeated until the mining is completed.

[0017] Preferably, it also includes a ninth step, when the inter-pan pillars are recovered at the end of mine production, an empty field with bottom pillars and subsequent backfilling mining method is adopted, the second and third steps are repeated, and the ore chute is reused as a cutting shaft for the recovery of inter-pan pillars in the lower middle section; the sorting ore transportation connecting tunnel is reused as the mine exit route of this middle section; and the pan area connecting tunnel is reused as the bottom collection trench tunnel for the inter-pan pillars in this middle section.

[0018] Preferably, in the third step, a Ladiji ore trench tunnel is excavated in the mining field, and fan-shaped blast holes are drilled in the Ladiji ore trench tunnel.

[0019] Preferably, the distance between the mine access roads is 17m, and the intersection angle between the mine access roads and the mine connecting tunnels is 45°.

[0020] Preferably, it is mainly suitable for large-scale mines that adopt the panel-type open-pit subsequent filling method with a bottom structure.

[0021] Preferably, the bottom structure of the mining field consists of trenches, mining access roads and mining tunnels, ensuring that there are mining tunnels on both sides of the adjacent columns between the disk sections, and the mining tunnels are not damaged after the mining of the mining field is completed.

[0022] Preferably, a new mining and filling auxiliary system project is added to provide space for reuse of column recovery in later disk intervals.

[0023] Preferably, in the sixth step, the excavation angle of the sorting ore transportation connecting tunnel is 45°.

[0024] Preferably, the sorting chamber and the sorting waste rock transportation connecting tunnel adopt one or more methods to sort the ore and waste rock according to the difference in properties, including but not limited to magnetic method, photoelectric method and other sorting methods.

[0025] Preferably, after the third step is completed, vertical and inclined blast holes are drilled in the rock drilling tunnel or the rock drilling cross tunnel.

[0026] The present invention provides a method for recycling the space of an underground short-process mining and filling chamber, and its beneficial effects are:

[0027] (1) The underground short-process mining and filling chamber reuses the ore-exit tunnel and the panel-area connecting tunnel of the existing mining area; the newly added ore chute of the underground short-process mining and filling system can be used as the unloading channel for the non-depleted ore of the surrounding mining areas; when the inter-panel pillars are recovered, the newly added ore chute of the underground short-process mining and filling system is reused as the cutting shaft for the recovery of the inter-panel pillars in the lower middle section; the newly added sorting ore transportation connecting tunnel is reused as the ore-exit route for the recovery of the inter-panel pillars in this middle section; the panel-area connecting tunnel is reused as the bottom collection trench tunnel for the recovery of the inter-panel pillars in this middle section;

[0028] (2) Combined with the layout of the short-process mining and filling shaft and tunnel engineering, as well as the surrounding stope recovery and inter-panel column recovery technology, the shaft and tunnel engineering involved in the above-mentioned process is reused more than twice, further reducing the cost of short-process mining and filling system construction and panel area mining and cutting engineering. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] 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:

[0030] Figure 1 It is a plan view of the mining and filling well tunnel engineering structure of the present invention;

[0031] Figure 2 A diagram of a mining method suitable for the present invention;

[0032] Figure 3 A diagram of a mining method suitable for the present invention;

[0033] Figure 4 A diagram of a mining method suitable for the present invention;

[0034] Figure 5 A diagram of the mining method for inter-panel pillar recovery;

[0035] Figure 6 Diagram of the mining method for inter-panel pillar recovery.

[0036] In the figure: 1. Scraper; 2. Feeder; 3. Crusher; 4. Belt conveyor; 5. Vibrating screen; 6. Sorting system; 7. Ore chute; 8. Waste rock filling shaft; 9. Connecting tunnel along the vein; 10. Connecting tunnel in the panel area; 11. Mine exit tunnel; 12. Mine exit route; 13. Rock drilling horizontal vein tunnel; 14. Panel interval column; 15. Rock drilling tunnel; 16. Rock drilling horizontal tunnel; 17. Cutting shaft; 18. Ore collecting trench; 19. Ventilation shaft; 20. Panel interval column ore collecting trench; 21. Panel interval column rock drilling tunnel; 22. Panel interval column ore exit tunnel; 23. Panel interval column ore exit route; 24. Panel interval column cutting shaft; 25. Tailings filling body; 26. Cemented tailings filling body. DETAILED DESCRIPTION

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] In the description of the present invention, "chamber" refers to a horizontal tunnel with a larger cross-section and a shorter length that does not directly lead to the surface exit.

[0043] 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.

[0044] The present invention aims to solve the problems in the prior art of low utilization rate of chamber space and high cost of panel area mining and cutting engineering.

[0045] In the present invention, reference is made to Figures 1 to 6 A method for recycling the space of an underground short-process mining and filling chamber comprises the following steps:

[0046] The first step is to divide the ore body into panels, organize production with the panels as the mining units, arrange panel-area columns 14 between the panels, and arrange panel-area connecting tunnels 10 in the panel-area columns 14; divide the panel into an even number of mining areas to ensure that there are mining connecting tunnels 11 on both sides of the panel-area columns 14.

[0047] In the second step, the mining structure of the mining field adopts the trench type, and a set of mining bottom structure is set up for every two mining fields. A mining joint tunnel 11 is excavated on one side of one of the mining fields to connect the vein connecting tunnels 9 on both sides, and a mining access 12 is excavated in the mining joint tunnel 11 facing the other side of the mining field. The spacing between the mining access 12 is 17m, and the intersection angle between the mining access 12 and the mining joint tunnel 11 is 45°. A bottom mining trench 18 tunnel is excavated in the mining field, and fan-shaped blast holes are drilled in the bottom mining trench 18 tunnel.

[0048] In the third step, the top of the stope is rock drilling level, and two rock drilling tunnels 15 are set in each stope, and a rock drilling tunnel 16 is excavated between the rock drilling tunnels 15. A raise drilling machine is used to excavate and cut the raise 17 to provide a free surface for large-area deep hole blasting, and then vertical and inclined blastholes are drilled in the rock drilling tunnel 15 or the rock drilling tunnel 16.

[0049] The fourth step is to give priority to mining the stopes on both sides of the disk area. After mining, a filling retaining wall is set in the bottom mining access road 12, and then the stope is filled with cemented filling body.

[0050] The fifth step is to reuse the mining connection tunnel 11 of the mined area, arrange the crushing chamber, sorting chamber and sorting waste rock transportation connection tunnel in the tunnel, and expand and support the tunnel or chamber according to the size of the equipment.

[0051] Step 6: excavate a sorting ore transportation connection tunnel along a 45° oblique angle from the side wall of the sorting chamber toward the disk area connection tunnel 10, and excavate an ore chute 7 downward in the sorting ore transportation connection tunnel. The lower part of the ore chute 7 is connected with the main transportation tunnel of the lower middle section;

[0052] Step 7: Reuse the panel area connecting tunnel 10 as a non-depleted ore transportation tunnel for the surrounding mining areas;

[0053] Step 8. After the surrounding depleted waste rock is treated, the mining and filling equipment will be moved as a whole to the next plate area, and steps 4 to 8 will be repeated until the mining is completed.

[0054] In a preferred embodiment of the present invention, a ninth step is also included. When the inter-disk pillars are recovered at the end of mine production, an empty field with bottom pillars and subsequent backfilling mining method is adopted, and the second and third steps are repeated. The ore chute 7 is reused as a cutting shaft for the recovery of inter-disk pillars in the lower middle section; the sorting ore transportation connecting tunnel is reused as the mine exit route 12 of this middle section; and the disk area connecting tunnel 10 is reused as the bottom collection trench 18 tunnel for the inter-disk pillars 14 of this middle section.

[0055] In the preferred embodiment of the present invention, the method for reusing the space of the underground short-process mining and filling chamber is mainly suitable for large-scale mines that adopt the panel-type empty field and subsequent filling method with a bottom structure.

[0056] In a preferred embodiment of the present invention, the bottom structure of the mining field is composed of a trench, a mining access road 12 and a mining connection tunnel 11, ensuring that there are mining connection tunnels 11 on both sides of the adjacent disk interval columns 14, and the mining connection tunnels 11 are still intact after the mining of the mining field is completed, providing a reusable space for the layout of the mining and filling auxiliary system.

[0057] In a preferred embodiment of the present invention, the sorting chamber and the sorting waste rock transportation connecting tunnel adopt one or more methods to sort the ore and waste rock according to the difference in properties, including but not limited to magnetic method, photoelectric method and other sorting methods.

[0058] The following is a detailed description of a method for recycling space in an underground short-process mining and filling chamber of the present invention through a specific embodiment.

[0059] Example 1

[0060] This embodiment provides a method for recycling the space of an underground short-process mining and filling chamber, referring to Figures 1 to 6 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.

[0061] 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, 14 panel columns are arranged between the panels, the width of the ore column is 20m, and 10 panel connection tunnels are arranged in the ore column. The panel is divided along the strike, and the stopes are divided perpendicular to the strike. One 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.

[0062] 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 11 is excavated on one side of one of the mining areas to connect the connecting tunnels 9 along the vein on both sides, and an ore exit access 12 is excavated in the ore exit joint tunnel 11 toward the other side of the mining area. The distance between the ore exit access 12 is 17m, and the intersection angle between the ore exit access 12 and the ore exit joint tunnel 11 is 45°. A bottom ore collection trench 18 tunnel is excavated in the mining area, and fan-shaped blast holes are drilled in the bottom ore collection trench 18 tunnel.

[0063] The top of the stope is rock drilling level, and two rock drilling tunnels 15 are set in each stope, with a spacing of 9m between the rock drilling tunnels 15, and a rock drilling tunnel 16 is excavated between the rock drilling tunnels 15. A raise drilling rig is used to excavate and cut the raise 17 to provide a free surface for large-scale blasting, and then vertical and inclined blastholes are drilled in the rock drilling tunnel 15 or the rock drilling tunnel 16.

[0064] In this embodiment, the underground short-process mining and filling auxiliary system includes a feeding system, a coarse crushing system, a sorting system 6, and a transfer system, which are arranged in the inter-panel column 14 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 7, 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 11 of the adjacent mined field can be used and expanded and reconstructed; the undepleted ore transportation tunnel is arranged in the inter-panel column 14, and can be reused with the pan area connection tunnel 10; 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 10, and the ore chute 7 is excavated downward in the sorting ore transportation connection tunnel, and the lower part of the ore chute 7 is connected to the main transportation tunnel of the lower middle section;

[0065] The equipment of the feeding system includes a shovel loader 1 and a feeder 2. The shovel 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 sorting system 6.

[0066] The equipment of the crushing system and the sorting system 6 includes a crusher 3, a belt conveyor 4, a vibrating screen 5, and a sorting system 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 5 at the front end of the sorting system 6 through a belt to realize the continuous conveyance of the crushed ore to the sorting device; the sorting 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 a motor, an ore identification device and a dust removal device;

[0067] The equipment of the transfer system mainly includes a belt conveyor 4 and a vibrating ore-discharging machine, wherein the belt conveyor is used to transport the sorted ore and waste rock to the ore chute 7 and the waste rock filling shaft 8 respectively, and the vibrating ore-discharging machine is arranged below the ore chute 7 to control the ore to be transported to the main production system;

[0068] Spray dust removal devices are 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.

[0069] In this embodiment, the mining connection tunnel 11 and the panel area connection tunnel 10 of the adjacent mining field are used 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 7 can be used as the mining access 12 when the panel area pillar is recovered and the cutting skylight 17 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, low in cost of chamber excavation and support, and easy to control the safety of the chamber; in addition, the ore chute 7 in the present invention can be used as the mining access 12 and the cutting skylight 17 of the lower middle section when the panel area pillar is recovered. It also serves as an unloading channel for non-depleted ore in the surrounding mining areas, further reducing the construction cost of the mining area; 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 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, and the coverage range is wide, which 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.

[0070] Example 2

[0071] In this embodiment, refer to Figures 1 to 6 A method for reusing the space of an underground short-process mining and filling chamber is as follows:

[0072] The first step is to divide the ore body into panels, organize production with the panels as the mining units, arrange panel-area columns 14 between the panels, and arrange panel-area connecting tunnels 10 in the panel-area columns 14; divide the panel into an even number of mining areas to ensure that there are mining connecting tunnels 11 on both sides of the panel-area columns 14.

[0073] In the second step, the mining structure of the mining field adopts the trench type, and a set of mining bottom structure is set for every two mining fields. A mining joint tunnel 11 is excavated on one side of one of the mining fields to connect the connecting tunnels 9 along the vein on both sides, and a mining access road 12 is excavated in the mining joint tunnel 11 facing the other side of the mining field, and the intersection angle between the mining access road 12 and the mining joint tunnel 11 is °. A bottom mining trench 18 tunnel is excavated in the mining field, and fan-shaped blast holes are drilled in the bottom mining trench 18 tunnel.

[0074] In the third step, the top of the stope is rock drilling level, and two rock drilling tunnels 15 are set in each stope, and a rock drilling tunnel 16 is excavated between the rock drilling tunnels 15. A raise drilling machine is used to excavate and cut the raise 17 to provide a free surface for large-area deep hole blasting, and then vertical and inclined blastholes are drilled in the rock drilling tunnel 15 or the rock drilling tunnel 16.

[0075] The fourth step is to give priority to mining the stopes on both sides of the disk area. After mining, a filling retaining wall is set in the bottom mining access road 12, and then the stope is filled with cemented filling body.

[0076] The fifth step is to reuse the mining tunnel 11 of the mined field, arrange the crushing chamber, the sorting chamber and the sorting waste rock transportation tunnel in the tunnel, and expand and support the tunnel or chamber according to the size of the equipment;

[0077] Step 6: excavate a sorting ore transportation connection tunnel along a 45° oblique angle from the side wall of the sorting chamber toward the disk area connection tunnel 10, and excavate an ore chute 7 downward in the sorting ore transportation connection tunnel. The lower part of the ore chute 7 is connected with the main transportation tunnel of the lower middle section;

[0078] Step 7: Reuse the panel area connecting tunnel 10 as a non-depleted ore transportation tunnel for the surrounding mining areas;

[0079] Step 8: After the surrounding depleted waste rock is treated, the mining and filling equipment will be moved to the next plate area as a whole, and steps 4 to 8 will be repeated until the mining is completed;

[0080] The ninth step is to adopt the empty field and subsequent backfill mining method with bottom pillars at the end of mine production to recover the inter-pan pillars, repeat the second and third steps, reuse the ore chute 7 as the cutting shaft for recovering the inter-pan pillars in the lower middle section; reuse the sorting ore transportation connecting tunnel as the mine exit route 12 of this middle section; reuse the pan area connecting tunnel 10 as the tunnel for pulling the bottom collection trench 18 of the inter-pan pillars 14 of this middle section, and reuse the modified crushing chamber, sorting chamber and sorting waste rock transportation connecting tunnel as the mine exit connecting tunnel 11 of the inter-pan pillars 14.

[0081] In this embodiment, the underground short-process mining and filling chamber reuses the ore-exit tunnel 11 and the disk area connecting tunnel 10 of the mined mining area; the newly added ore chute 7 of the underground short-process mining and filling system can be used as an unloading channel for non-depleted ore in the surrounding mining areas; when the disk inter-pillar 14 is mined, the newly added ore chute 7 of the underground short-process mining and filling system is reused as the cutting shaft for the mining of the lower middle disk inter-pillar; the newly added sorting ore transportation connecting tunnel is reused as the ore-exit route 12 for the mining of the disk inter-pillar 14 in this middle section; the disk area connecting tunnel 10 is reused as the bottom collection trench 18 tunnel for the mining of the disk inter-pillar 14 in this middle section; the crushing chamber, sorting chamber and sorting waste rock transportation connecting tunnel that have been expanded and renovated are reused as the ore-exit tunnel 11 for the disk inter-pillar 14.

[0082] Combined with the layout of the short-process mining, dressing and filling shaft and tunnel engineering, as well as the surrounding stope recovery and disk area column 14 recovery technology, the above-mentioned shaft and tunnel engineering involved are reused more than twice, further reducing the cost of short-process mining, dressing and filling system construction and disk area mining and cutting engineering.

[0083] To sum up: the present invention improves the space utilization rate by reusing the ore-exit tunnel 11 and the disk area connecting tunnel 10 of the mined mining field through the mining and filling chamber; the newly added ore chute 7 of the underground short-process mining and filling system can be used as an unloading channel for non-depleted ore in the surrounding mining fields, further improving the space utilization rate; when the disk inter-pillar 14 is mined, the newly added ore chute 7 of the underground short-process mining and filling system is reused as a cutting shaft for the mining of the lower middle disk inter-pillar; the newly added sorting ore transportation connecting tunnel is reused as the ore-exit route 12 for the mining of the disk inter-pillar 14 in this middle section; the disk area connecting tunnel 10 is reused as the bottom ore collection trench 18 tunnel for the mining of the disk inter-pillar 14 in this middle section.

[0084] 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. A method for recycling the space of an underground short-process mining and filling chamber, characterized in that: The following steps are involved: The first step is to divide the ore body into panels, organize production with the panels as the mining units, arrange panel columns between the panels, and arrange the panel connection tunnels in the panel columns; divide the panel into an even number of stopes to ensure that there are mine-exit connection tunnels on both sides of the adjacent panel columns; In the second step, the mining structure of the mining area adopts trench type, and a mining bottom structure is set up for every two mining areas; a mining joint tunnel is excavated on one side of one of the mining areas to connect the connecting tunnels along the vein on both sides, and a mining access road is excavated in the mining joint tunnel towards the other side of the mining area; In the third step, the top of the stope is horizontal for rock drilling. Two rock drilling tunnels are set up in each stope, and rock cross tunnels are dug between the rock drilling tunnels. A raise drilling rig is used to dig and cut the raise to provide a free surface for large-area deep hole blasting. The fourth step is to give priority to mining the stopes on both sides of the disk area. After mining, a filling retaining wall is set up in the bottom ore exit access road, and then the stope is filled with cemented filling body; The fifth step is to reuse the mining tunnels of the mined areas, arrange crushing chambers, sorting chambers and sorting waste rock transportation tunnels in the tunnels, and expand and support the tunnels or chambers according to the size of the equipment; Step 6: excavate a sorting ore transportation connection tunnel along the oblique angle from the side wall of the sorting chamber to the disk area connection tunnel, and excavate an ore chute downward in the sorting ore transportation connection tunnel. The lower part of the ore chute is connected with the main transportation tunnel in the lower middle section; Step 7: Reuse the panel area connecting tunnel as the non-depleted ore transportation tunnel for the surrounding mining areas; Step 8. After the surrounding depleted waste rock is treated, the mining and filling equipment will be moved as a whole to the next plate area, and steps 4 to 8 will be repeated until the mining is completed.

2. A method for recycling space of underground short-process mining and filling chamber according to claim 1, characterized in that: It also includes the ninth step. When the inter-pan pillars are recovered at the end of mine production, the empty-field and subsequent backfill mining method with bottom pillars is adopted, and the second and third steps are repeated. The ore chute is reused as the cutting shaft for the recovery of the inter-pan pillars in the lower middle section; the sorting ore transportation connecting tunnel is reused as the mine exit route of this middle section; and the pan area connecting tunnel is reused as the inter-pan area pillar pulling bottom collection trench tunnel of this middle section.

3. The method for recycling the space of an underground short-process mining and filling chamber according to claim 1, characterized in that: In the third step, a Ladiji mine trench tunnel is excavated in the mining area, and fan-shaped blast holes are drilled in the Ladiji mine trench tunnel.

4. The method for recycling the space of an underground short-process mining and filling chamber according to claim 1, characterized in that: The distance between the mine access roads is 17m, and the intersection angle between the mine access roads and the mine connecting tunnels is 45°.

5. A method for recycling space of an underground short-process mining and filling chamber according to any one of claims 1 to 4, characterized in that: It is mainly suitable for large-scale mines that adopt the plate-type open-pit subsequent filling method with bottom structure.

6. A method for recycling space of underground short-process mining and filling chamber according to claim 5, characterized in that: The bottom structure of the mining area is composed of trenches, mining access roads and mining connecting tunnels, ensuring that there are mining connecting tunnels on both sides of the adjacent columns of the disk area, and the mining connecting tunnels are still not damaged after the mining of the mining area is completed.

7. A method for recycling space of underground short-process mining and filling chamber according to claim 6, characterized in that: The newly added mining, selection and filling auxiliary system project provides space for reuse of column recovery in later stages of the disk area.

8. The method for recycling the space of an underground short-process mining and filling chamber according to claim 1, characterized in that: In the sixth step, the excavation angle of the sorting ore transportation connecting tunnel is 45°.

9. The method for recycling the space of an underground short-process mining and filling chamber according to claim 1, characterized in that: The sorting chamber and the sorting waste rock transportation connecting tunnel adopt one or more methods to sort the ore and waste rock according to the difference in properties, including but not limited to magnetic method, photoelectric method and other sorting methods.

10. The method for recycling the space of an underground short-process mining and dressing chamber according to claim 1, characterized in that: After the third step is completed, vertical and inclined blast holes are drilled in the rock drilling tunnel or the rock drilling cross tunnel.

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