Underground short process mining and dressing chamber space reuse method

Abstract

The application provides a kind of underground short process mining and selecting filling chamber space reuse method, relates to underground mining technical field, including reusing the ore drawing connecting lane of mined stope, arranging broken chamber, sorting chamber and sorting waste rock transport connecting lane in the roadway, and expanding and supporting the roadway or chamber according to the size of equipment; the sorting ore transport connecting lane is excavated along the inclined angle to the panel connecting lane along the side of the sorting chamber, the ore chute is excavated downward in the sorting ore transport connecting lane, and the ore chute is communicated with the main transport lane of the lower middle section below; the panel connecting lane is reused as the non-dilution ore transport lane of the surrounding stope. The application combines the layout of short process mining and selecting filling shaft and gallery engineering, and the surrounding stope stoping and panel column stoping process, the reuse times of the above-mentioned shaft and gallery engineering are more than 2, which further reduces the cost of short process mining and selecting filling system construction and panel mining and cutting engineering.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of underground mining, and particularly relates to a method for repeatedly using space of a chamber for underground short-process mining and dressing. BACKGROUND

[0002] With the exhaustion of shallow metal mineral resources, large-scale transition to deep resource mining is being made at home and abroad, and the construction of large mines with a depth of more than 1,000 meters has become the main trend in the future. However, the metal ore is generally complex in occurrence, and some ore bodies are seriously branched and compounded, and have many and scattered internal inclusions, which makes it difficult to remove waste rock during mining and results in high ore dilution. The conventional underground mining-surface dressing mode has problems such as high cost of upgrading, large land occupation of the waste dump and dressing plant, and the like. For large deep underground mines, the above problems caused by dilution ore are more prominent. Underground mining-dressing-filling integration is an important means to alleviate the shortage of land resources and reduce the cost of upgrading, that is, the mining system, the dressing system and the filling system are all arranged underground.

[0003] The underground mining-dressing-filling integrated system is relatively mature in the field of coal, and the broken coal gangue is sorted and filled in place underground. In the field of non-coal mines, due to the relatively complex dressing process and large space requirement, the construction and maintenance cost of underground dressing chamber is high, and there are only small-scale examples of underground mining-dressing-filling integrated system in foreign mines, and domestic mines are still in the design and research stage. For example, the published invention patent "A modular dressing equipment system suitable for underground mining-dressing-filling" is based on small-scale metal thin vein mining, and uses a container to modularly manage dressing equipment. For large deep underground mines, if the whole process of dressing process is placed underground, the construction and management difficulty of the mining-dressing-filling integrated system will be multiplied. When large deep underground mines are mined, reducing the cost of waste rock lifting and disposal is the main research direction.

[0004] Deep large underground metal mines generally use mining methods with high production capacity such as stage open stope method, and the stope structure parameters are large, and extensive blasting is carried out by using medium-length holes and long holes, which leads to the problem that it is difficult to separate ore and waste rock at the upper and lower walls of the ore body and the internal inclusion position of the ore body, and further increases the lifting and transportation cost of dilution ore and the working load of the surface dressing plant. At the same time, the mining range of large mines is wide, and the dilution ore is scattered and difficult to concentrate, and the construction of underground dressing plant also has problems such as high cost, so it is extremely important to develop a method for repeatedly using space of a chamber for underground short-process mining and dressing, and to repeatedly use the space of the chamber for the auxiliary system of mining-dressing-filling.

[0005] Therefore, it is necessary to provide an improved technical solution to overcome the above problems of the prior art. SUMMARY

[0006] The underground short process mining and filling chamber space recycling method aims to solve the problems of low utilization rate of chamber space and high cost of panel mining and cutting engineering.

[0007] In order to achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0008] The underground short process mining and filling chamber space recycling method comprises the following steps:

[0009] Firstly, the ore body is divided into panels, and the production is organized by taking the panel as the stoping unit, the panel-to-panel column is arranged between the panels, and the panel connecting roadway is arranged in the panel-to-panel column; the panel is divided into an even number of stope, and the panel-to-panel column is ensured to have the ore-drawing connecting roadway on the two adjacent sides;

[0010] Secondly, the trench type is adopted for the ore-drawing structure of the stope, and one set of ore-drawing bottom structure is arranged for every two stopes; one ore-drawing connecting roadway is excavated on one side of one of the stopes, which penetrates the two sides along the vein connecting roadway, and the ore-drawing access is excavated in the ore-drawing connecting roadway towards the other side of the stope;

[0011] Thirdly, the top of the stope is the drilling level, two drilling roadways are arranged for each stope, and the rock cross roadway is excavated between the drilling roadways; the raise drill is used to excavate the cutting raise to provide the free surface for the large-area deep hole blasting;

[0012] Fourthly, the stopes on the two sides of the panel are preferentially mined, the filling retaining wall is arranged in the ore-drawing access after the mining, and then the stope is filled with the cemented filling body;

[0013] Fifthly, the ore-drawing connecting roadway of the mined stope is recycled, the crushing chamber, the sorting chamber and the sorting waste rock transportation connecting roadway are arranged in the roadway, and the roadway or the chamber is expanded and supported according to the size of the equipment;

[0014] Sixthly, the sorting ore transportation connecting roadway is excavated along the inclined angle from the side of the sorting chamber to the panel connecting roadway, the ore chute is excavated downward in the sorting ore transportation connecting roadway, and the ore chute is communicated with the main transportation roadway of the lower section below;

[0015] Seventhly, the panel connecting roadway is recycled, which is used as the non-diluted ore transportation roadway of the surrounding stope;

[0016] Eighthly, after the surrounding dilution waste rock treatment is completed, the mining and filling equipment is integrally migrated to the next panel, and the fourth step to the eighth step is repeated until the mining is completed.

[0017] Preferably, a ninth step is also included, when the inter-panel pillar recovery is carried out at the end of the mine production, a stage emptying subsequent filling mining method with a bottom pillar is used, the second step and the third step are repeated, the ore chute is repeatedly used as a cutting well for the inter-panel pillar recovery of the lower middle section; the sorting ore transportation connecting lane is repeatedly used as an ore outlet access of the present middle section; and the panel connecting lane is repeatedly used as a panel pillar bottom setting collection trench of the present middle section.

[0018] Preferably, in the third step, a bottom setting collection trench is drilled in the stope, and a fan-shaped blast hole is drilled in the bottom setting collection trench.

[0019] Preferably, the ore outlet access spacing is 17 m, and the intersection angle between the ore outlet access and the ore outlet connecting lane is 45°.

[0020] Preferably, the method is mainly suitable for large mines adopting the panel type emptying subsequent filling method with a bottom structure.

[0021] Preferably, the stope bottom structure is composed of a trench, an ore outlet access and an ore outlet connecting lane, the adjacent two sides of the panel pillar are provided with the ore outlet connecting lanes, and the ore outlet connecting lanes are not damaged after the stope is mined.

[0022] Preferably, the newly added mining and sorting auxiliary system provides a repeatedly used space for the panel pillar recovery in the later period.

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

[0024] Preferably, the sorting chamber and the sorting waste rock transportation connecting lane are sorted according to the property difference between the ore and the waste rock by one or more methods, including but not limited to a magnetic method, an optical-electric method and the like.

[0025] Preferably, after the third step is completed, a vertical and inclined blast hole is drilled in a drilling roadway or a drilling cross lane.

[0026] The underground short-flow mining and sorting filling chamber space repeatedly used method provided by the application has the following beneficial effects:

[0027] (1) The underground short-flow mining and sorting filling system repeatedly uses the ore outlet connecting lanes and the panel connecting lanes of the mined stope; the newly added ore chute of the underground short-flow mining and sorting filling system can be used as a non-diluted ore unloading channel of the surrounding stope; the newly added ore chute of the underground short-flow mining and sorting filling system is repeatedly used as a cutting well for the inter-panel pillar recovery of the lower middle section; the newly added sorting ore transportation connecting lane is repeatedly used as an ore outlet access for the inter-panel pillar recovery of the present middle section; and the panel connecting lane is repeatedly used as a panel pillar bottom setting collection trench of the present middle section.

[0028] (2) Combined with the layout of short process mining and filling of filling shaft roadway engineering, and the surrounding stope mining and inter-panel pillar mining process, the above-mentioned shaft and roadway engineering is reused more than 2 times, further reducing the cost of short process mining and filling system construction and panel mining and cutting engineering. BRIEF DESCRIPTION OF DRAWINGS

[0029] The accompanying drawings, which form a part of this specification, are included to provide a further understanding of the application, and are incorporated herein by reference. The embodiments illustrated in the drawings are shown as examples of the application only, and therefore should not be taken as limiting the present application. In the drawings:

[0030] Figure 1 is the structure plan of the mining and filling shaft and roadway engineering of the present application;

[0031] Figure 2 is a mining method diagram suitable for the present application;

[0032] Figure 3 is a mining method diagram suitable for the present application;

[0033] Figure 4 is a mining method diagram suitable for the present application;

[0034] Figure 5 is a mining method diagram for inter-panel pillar mining;

[0035] Figure 6 is a mining method diagram for inter-panel pillar mining.

[0036] In the drawings: 1, a shovel loader; 2, a feeder; 3, a crusher; 4, a belt conveyor; 5, a vibrating screen; 6, a sorting system; 7, an ore chute; 8, a waste rock filling shaft; 9, a vein along the connecting roadway; 10, a panel connecting roadway; 11, a mine connecting roadway; 12, a mine access; 13, a rock drilling level along the vein roadway; 14, an inter-panel pillar; 15, a rock drilling roadway; 16, a rock drilling cross roadway; 17, a cutting shaft; 18, a mine collecting trench; 19, a ventilation shaft; 20, an inter-panel pillar mine collecting trench; 21, an inter-panel pillar rock drilling roadway; 22, an inter-panel pillar mine connecting roadway; 23, an inter-panel pillar mine access; 24, an inter-panel pillar cutting shaft; 25, a tailings filling body; 26, a cemented tailings filling body. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments in the present application belong to the scope of protection of the present application.

[0038] In the description of the present application, it needs to be understood that the orientation description, such as the orientation or position relationship indicated by the upper, lower, front, rear, left, right and the like, is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0039] In the description of the present application, the meaning of one or more is one or more, the meaning of multiple is two or more, greater than, less than, more than and the like are understood as not including the number, above, below, within and the like are understood as including the number. If the first, second is described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0040] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more features.

[0041] In the description of the present application, it needs to be explained that, unless otherwise explicitly specified and limited, the term "connection" should be understood broadly, for example, it can be fixed connection or movable connection, or detachable connection or non-detachable connection, or integral connection; it can be mechanical connection, or electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through intermediate medium, or the internal communication of two elements, indirect communication or interaction relationship between two elements.

[0042] In the description of the present application, "chamber" refers to a horizontal tunnel which is not directly connected to the surface outlet, has a larger cross section and a shorter length.

[0043] The present application will be described in detail below with reference to the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0044] The present application aims at the problem of low utilization rate of chamber space and high cost of disc mining engineering in the prior art.

[0045] In the present application, with reference to Figures 1 to 6 A method for reusing the space of a short-process underground mining and selecting chamber, comprising the following steps:

[0046] Firstly, the ore body is divided into panels, and production is organized by taking the panel as a stoping unit, a panel pillar 14 is arranged between the panels, and a panel connecting roadway 10 is arranged in the panel pillar 14; the panel is divided into even number of stope, and it is ensured that the panel pillar 14 has two adjacent sides with ore-drawing connecting roadways 11.

[0047] Secondly, a trench type is adopted for the stope ore-drawing structure, and one set of ore-drawing bottom structure is arranged for every two stopes. One ore-drawing connecting roadway 11 is excavated on one side of one of the stopes, and the ore-drawing connecting roadway 11 penetrates two sides along the vein connecting roadway 9, an ore-drawing access 12 is excavated in the ore-drawing connecting roadway 11 and is directed to the other side of the stope, the distance between the ore-drawing accesses 12 is 17 m, and the intersection angle between the ore-drawing access 12 and the ore-drawing connecting roadway 11 is 45°. A bottom collection trench 18 is excavated in the stope, and fan-shaped blast holes are drilled in the bottom collection trench 18.

[0048] Thirdly, the top of the stope is a drilling level, two drilling roadways 15 are arranged in each stope, and a drilling cross roadway 16 is excavated between the drilling roadways 15. A raise drill is used to excavate a cut raise 17 to provide a free surface for large-area deep-hole blasting, and then vertical and inclined blast holes are drilled in the drilling roadway 15 or the drilling cross roadway 16.

[0049] Fourthly, the stopes on the two sides of the panel are preferentially mined, a filling retaining wall is arranged in the bottom ore-drawing access 12 after the stopes are mined, and then the stopes are filled with cemented filling bodies.

[0050] Fifthly, the ore-drawing connecting roadways 11 of the mined stopes are repeatedly used, and crushing chambers, sorting chambers and sorting waste rock transportation connecting roadways are arranged in the roadways, and the roadways or chambers are expanded and supported according to the size of the equipment.

[0051] Sixthly, a sorting ore transportation connecting roadway is excavated at a 45° angle from the side of the sorting chamber to the panel connecting roadway 10, and an ore chute 7 is excavated downward in the sorting ore transportation connecting roadway, and the ore chute 7 is connected with the main transportation roadway of the lower middle section below.

[0052] Seventhly, the panel connecting roadway 10 is repeatedly used as the undiluted ore transportation roadway of the surrounding stopes.

[0053] Eighthly, after the surrounding dilution waste rock treatment is completed, the mining and selecting filling equipment is integrally migrated to the next panel, and the fourth step to the eighth step is repeated until the mining is completed.

[0054] In the preferred embodiment of the application, a ninth step is further included, when the panel pillar is recovered at the end of the mine production, a bottom-pillared subsequent filling stoping method is adopted, the second step and the third step are repeated, the ore chute 7 is repeatedly used as a cutting well for the panel pillar stoping of the lower middle section, the sorting ore transportation connecting roadway is repeatedly used as the ore-drawing access 12 of the middle section, and the panel connecting roadway 10 is repeatedly used as the panel pillar 14 bottom collection trench 18 roadway of the middle section.

[0055] In the preferred embodiment of the present application, the underground short process mining and sorting chamber space reuse method is mainly applicable to large mines using the sublevel open stoping method with a bottom structure.

[0056] In the preferred embodiment of the present application, the stope bottom structure is composed of a trench, a mining access 12 and a mining connecting roadway 11, which ensures that the adjacent two sides of the panel column 14 have the mining connecting roadway 11, and the mining connecting roadway 11 is not damaged after the stope mining is completed, thereby providing a reusable space for the layout of the mining and sorting auxiliary system.

[0057] In the preferred embodiment of the present application, the sorting chamber and the sorting waste rock transportation connecting roadway are sorted according to the property difference between the ore and the waste rock by one or more methods, including but not limited to magnetic method, photoelectric method and other sorting methods.

[0058] The underground short process mining and sorting chamber space reuse method of the present application will be described in detail below through specific embodiments.

[0059] Embodiment 1

[0060] The present embodiment provides an underground short process mining and sorting chamber space reuse method, which refers to Figures 1 to 6 The mine has an annual production scale of 10 million tons, a mining depth of more than 1000 m, and uses the high-stage large-diameter open stoping method. The main ore body is a gently inclined thick ore body with serious branch compounding and serious ore dilution in the upper and lower panels. The ore body is scattered with a lot of inclusions, which is difficult to remove during mining, thereby increasing the dilution degree. According to the mine production data, the average dilution rate of the high-stage stope is 15% to 20%, and it is estimated that the amount of waste rock generated per year is nearly 1 million tons or more.

[0061] The underground stope structure arrangement of the mine is as follows: the ore body is divided into panels, and the production is organized by taking the panel as the stoping unit. The panel size is 144m x 90m, the panel column 14 is arranged between the panels, the ore pillar is 20m wide, and the panel connecting roadway 10 is arranged in the ore pillar. The panel is divided along the strike, and the stope is divided vertically to the strike direction. One panel is composed of 8 stopes, the stope is 18m wide, 72m long, and 75-90m high, no top pillar is left, and the panel is divided into one-step stopes and two-step stopes.

[0062] The mining bottom structure adopts a trench type, and one set of mining bottom structure is arranged every two stopes. One mining connecting roadway 11 is excavated on one side of one of the stopes, which penetrates through the two sides along the vein connecting roadway 9. The mining access 12 is excavated in the opposite direction to the other side of the stope from the mining connecting roadway 11. The distance between the mining access 12 is 17m, and the intersection angle between the mining access 12 and the mining connecting roadway 11 is 45°. The bottom collection trench 18 is excavated in the stope, and the fan-shaped blast hole is drilled in the bottom collection trench 18.

[0063] The top of the stope is the drilling level, two drilling galleries 15 are arranged in each stope, the distance between the drilling galleries 15 is 9 m, and a drilling cross gallery 16 is excavated between the drilling galleries 15. A raise boring machine is used to excavate a cutting raise 17 to provide a free surface for large-area blasting, and then vertical and inclined blast holes are drilled in the drilling gallery 15 or the drilling cross gallery 16.

[0064] In the embodiment, the underground short-process mining and dressing auxiliary system includes a feeding system, a coarse crushing system, a sorting system 6, and a transfer system, is arranged in the panel column 14 near the seriously depleted ore, and mainly includes an un-depleted ore transportation gallery, a crushing chamber, a sorting chamber, a sorting waste rock transportation connecting gallery, a sorting ore transportation connecting gallery, and an ore chute 7, etc. The crushing chamber, the sorting chamber, and the sorting waste rock transportation connecting gallery are arranged on the same straight line, the ore drawing connecting gallery 11 of the adjacent mined stope can be used and expanded, the un-depleted ore transportation gallery is arranged in the panel column 14 and can be reused with the panel connecting gallery 10, the sorting ore transportation connecting gallery is excavated along a 45° inclined angle from the side of the sorting chamber to the panel connecting gallery 10, the ore chute 7 is excavated downward in the sorting ore transportation connecting gallery, and the ore chute 7 is communicated with the main transportation gallery 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 stope to the feeder 2, and the feeder 2 temporarily stores the depleted ore to change the intermittent ore supply to the sorting system 6 into stable and continuous ore supply;

[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 the sorting system 6, wherein the crusher 3 is arranged in the crushing chamber to crush the uneven stone with a diameter of 300-800 mm into less than 350 mm, the crusher 3 is connected with the vibrating screen 5 at the front end of the sorting system 6 through a belt to realize the continuous conveying of the crushed ore to the sorting device, the sorting system 6 adopts one or more methods according to the property difference between the ore and the waste rock, including but not limited to the magnetic method, the photoelectric method, and other sorting methods, and the sorting device is provided with a motor, an ore identification device, and a dust removal device;

[0067] The equipment of the transfer system mainly includes the belt conveyor 4 and a vibrating ore feeder, 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 feeder is arranged below the ore chute 7 to control the ore to be transported to the main production system;

[0068] The crushing chamber and the sorting chamber are provided with a spraying dust removal device at the top to reduce the dust generated in the sorting and crushing process and optimize the working environment of the whole system.

[0069] In this embodiment, the underground space is reused by using the ore drawing connecting lane 11 and the panel connecting lane 10 of the adjacent mined-out stope, which greatly reduces the construction cost of the mining, dressing and filling system; the newly added sorting ore transportation connecting lane and the ore chute 7 can be used as the ore drawing access 12 and the cutting raise 17 of the lower middle section during the panel pillar recovery, and the reuse rate of the underground space is nearly 100%; the mining, dressing and filling equipment involved in the present application has a small volume, low cavern excavation and support cost, and easy-to-control cavern safety; in addition, the ore chute 7 in the present application also serves as a unloading channel for the non-diluted ore of the surrounding stope, further reducing the construction cost of the mining area; the crushing, sorting and transportation processes of the diluted ore are all carried out in the existing mine roadway, and a spraying dust removal device is installed in the cavern, which has little interference with the main production system; the mining, dressing and filling auxiliary system of the present application is flexible in arrangement, all the equipment is movable, has a wide coverage, and can realize the spot sorting of the area with serious ore dilution; the mining, dressing and filling auxiliary system of the present application can effectively reduce the ore lifting cost and the surface ore dressing load, and is conducive to reducing the minimum recoverable grade of the ore deposit.

[0070] Embodiment 2

[0071] In this embodiment, with reference to Figures 1 to 6 A method for reusing the space of a short-process mining, dressing and filling cavern underground comprises the following steps:

[0072] Firstly, the ore body is divided into panels, the production is organized by taking the panel as the stoping unit, the panel-to-panel pillar 14 is arranged between the panels, and the panel connecting lane 10 is arranged in the panel-to-panel pillar 14; the panel is divided into an even number of stopes, and the panel-to-panel pillar 14 is ensured to have the ore drawing connecting lane 11 on both sides.

[0073] Secondly, the trench type is adopted for the stope ore drawing structure, and one set of ore drawing bottom structure is arranged for every two stopes. One ore drawing connecting lane 11 is excavated on one side of one of the stopes, which penetrates through the two sides along the vein connecting lane 9, and the ore drawing access 12 is excavated in the ore drawing connecting lane 11 towards the other side of the stope, and the intersection angle between the ore drawing access 12 and the ore drawing connecting lane 11 is °. The bottom collection trench 18 is excavated in the stope, and the fan-shaped blast hole is drilled in the bottom collection trench 18.

[0074] Thirdly, the top of the stope is the rock drilling level, two rock drilling roadways 15 are arranged in each stope, and the rock drilling crossways 16 are excavated between the rock drilling roadways 15. The raise drill is used to excavate the cutting raise 17 to provide a free surface for large-area deep hole blasting, and then the vertical and inclined blast holes are drilled in the rock drilling roadways 15 or the rock drilling crossways 16.

[0075] Fourthly, the stopes on both sides of the panel are preferentially mined, the filling retaining wall is arranged in the bottom ore drawing access 12 after the mining, and then the stope is filled with the cemented filling body.

[0076] The fifth step is to repeatedly use the mined-out mining connecting roadway 11, arrange the crushing chamber, the sorting chamber and the sorting waste rock transportation connecting roadway in the roadway, and expand the roadway or the chamber and support it according to the size of the equipment;

[0077] The sixth step is to excavate the sorted ore transportation connecting roadway along the 45° inclined angle from the side of the sorting chamber to the panel connecting roadway 10, and excavate the ore chute 7 downward in the sorted ore transportation connecting roadway, which is communicated with the main transportation roadway of the lower middle section;

[0078] The seventh step is to repeatedly use the panel connecting roadway 10 as the non-diluted ore transportation roadway of the surrounding stope;

[0079] The eighth step is to migrate the mining and sorting equipment to the next panel after the surrounding dilution waste rock treatment is completed, and repeat the fourth step to the eighth step until the mining is completed;

[0080] The ninth step is to use the pillar backfill mining method with a bottom pillar when the inter-panel pillar is recovered at the end of the mine production, repeat the second step and the third step, repeatedly use the ore chute 7 as the cutting well for the inter-panel pillar recovery of the lower middle section, repeatedly use the sorted ore transportation connecting roadway as the ore unloading access 12 of the middle section, repeatedly use the panel connecting roadway 10 as the panel inter-column 14 of the middle section, and repeatedly use the expanded crushing chamber, the sorting chamber and the sorting waste rock transportation connecting roadway as the ore unloading connecting roadway 11 of the panel inter-column 14.

[0081] In the embodiment, the underground short-process mining and sorting chamber repeatedly uses the mined-out ore unloading connecting roadway 11 and the panel connecting roadway 10, the newly added ore chute 7 of the underground short-process mining and sorting system can be used as the unloading channel of the non-diluted ore of the surrounding stope, the newly added ore chute 7 of the underground short-process mining and sorting system is repeatedly used as the cutting well for the inter-panel pillar recovery of the lower middle section when the panel inter-column 14 is recovered, the newly added sorted ore transportation connecting roadway is repeatedly used as the ore unloading access 12 of the panel inter-column 14 of the middle section, the panel connecting roadway 10 is repeatedly used as the panel inter-column 14 of the middle section, and the expanded crushing chamber, the sorting chamber and the sorting waste rock transportation connecting roadway are repeatedly used as the ore unloading connecting roadway 11 of the panel inter-column 14.

[0082] Combining the arrangement of the short-process mining and sorting well and roadway engineering, and the recovery of the surrounding stope and the panel inter-column 14, the above-mentioned well and roadway engineering is repeatedly used more than twice, which further reduces the cost of the short-process mining and sorting system construction and the panel mining and cutting engineering.

[0083] In summary: the application improves the space utilization by reusing the mined-out connecting roadway 11 and the panel connecting roadway 10 of the mined-out stope; the ore chute 7 newly added in the underground short-process mining and dressing system can be used as a channel for un-diluted ore of the surrounding stope, further improving the space utilization; when the panel column 14 is recovered, the ore chute 7 newly added in the underground short-process mining and dressing system is reused as a cutting well for the recovery of the panel column in the lower middle section; the newly added sorting ore transportation connecting roadway is reused as the ore outlet access 12 for the recovery of the panel column 14 in the middle section; the panel connecting roadway 10 is reused as the panel column 14 in the middle section for the recovery of the bottom ore collection trench 18.

[0084] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for reusing space of a short underground process mining and beneficiation chamber, characterized in that, The method comprises the following steps: Firstly, the ore body is divided into panels, and production is organized by taking the panel as a stoping unit, and a panel pillar is arranged between the panels, and a panel connecting roadway is arranged in the panel pillar; the panel is divided into even number of stopes, and the panel pillar is ensured to have two ore-drawing connecting roadways on the adjacent two sides; Secondly, a trench type stope ore-drawing structure is adopted, and one set of ore-drawing bottom structure is arranged for every two stopes; one ore-drawing connecting roadway is dug on one side of one stope, and the ore-drawing connecting roadway penetrates two side along-vein connecting roadways, and an ore-drawing access is dug in the ore-drawing connecting roadway and is directed to the other side of the stope; Thirdly, a drilling level is arranged at the top of the stope, two drilling roadways are arranged in each stope, and a drilling cross roadway is dug between the drilling roadways; a raise drill is used to dig a cutting raise to provide a free surface for large-area deep hole blasting; Fourthly, the stopes on the two sides of the panel are preferentially mined, a filling retaining wall is arranged in the ore-drawing access after the stopes are mined, and then the stopes are filled with cemented filling bodies; Fifthly, the ore-drawing connecting roadway of the mined stope is repeatedly used, a crushing chamber, a sorting chamber and a sorting waste rock transportation connecting roadway are arranged in the roadway, and the roadway or the chamber is expanded and supported according to the size of the equipment; Sixthly, a sorting ore transportation connecting roadway is dug at an inclined angle from the side of the sorting chamber to the panel connecting roadway, and an ore chute is dug downward in the sorting ore transportation connecting roadway, and the ore chute is communicated with the main transportation roadway of the lower middle section; Seventhly, the panel connecting roadway is repeatedly used as the undiluted ore transportation roadway of the surrounding stopes; Eighthly, after the surrounding dilution waste rock treatment is completed, the mining and selecting filling equipment is integrally moved to the next panel, and the fourth step to the eighth step is repeated until the mining is completed.

2. The method according to claim 1, wherein, Ninthly, when the inter-panel ore pillar is recovered at the end of the mine production, a stage empty stope subsequent filling mining method with a bottom pillar is used, the second step and the third step are repeated, the ore chute is repeatedly used as a cutting well for the inter-panel ore pillar recovery of the lower middle section, the sorting ore transportation connecting roadway is repeatedly used as the ore-drawing access of the middle section, and the panel connecting roadway is repeatedly used as the panel pillar bottom collection trench roadway of the middle section.

3. The method of claim 1, wherein, In the third step, a bottom collection trench roadway is dug in the stope, and fan-shaped blast holes are drilled in the bottom collection trench roadway.

4. The method of claim 1, wherein, The ore-drawing access interval is 17 m, and the intersection angle between the ore-drawing access and the ore-drawing connecting roadway is 45°.

5. The method according to any one of claims 1-4, wherein, The method is mainly suitable for large mines adopting the panel type empty stope subsequent filling method with a bottom structure.

6. The method of claim 5, wherein, The stope bottom structure is composed of a trench, an ore-drawing access and an ore-drawing connecting roadway, the panel pillar is ensured to have two ore-drawing connecting roadways on the adjacent two sides, and the ore-drawing connecting roadway is not damaged after the stope is mined.

7. The method according to claim 6, wherein, The newly added mining and selecting filling auxiliary system provides a repeatedly used space for the inter-panel pillar recovery in the later period.

8. The method of claim 1, wherein, In the sixth step, the digging angle of the sorting ore transportation connecting roadway is 45°.

9. The method of claim 1, wherein, The sorting chamber and the sorting waste rock transportation connecting roadway are sorted according to the property difference between the ore and the waste rock by using one or more methods.

10. The method of claim 1, wherein, After the third step is completed, vertical and inclined blast holes are drilled in the drilling roadway or the drilling cross roadway.

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