Sublevel rock drilling stage ore removal subsequent filling mining method

Abstract

The invention discloses a sublevel rock drilling stage ore removal subsequent filling mining method, which relates to the technical field of mining and comprises the steps of mining preparation, rock drilling and blasting, ore removal and filling. Mining preparation is conducted, specifically, the ore body is divided into a plurality of stopes at intervals in the trend of the ore body, a plurality of segmented drilling roadways extending in the trend of the ore body are formed in the stopes at intervals up and down, and transportation roadways communicating with the segmented drilling roadways are formed outside the stopes; rock drilling and blasting are conducted, specifically, rock drilling and blasting are conducted on the ores above the segmented rock drilling roadways in sequence in the extending direction of the segmented rock drilling roadways, and the ores above the shallow segmented rock drilling roadways are mined firstly, so that the ores below the corresponding segmented rock drilling roadways can support rock drilling and blasting equipment during rock drilling; ore removal: the exploded ore is transported to the ground through a haulage roadway; and filling is conducted, specifically, a retaining wall is arranged in the haulage roadway, and filling operation is conducted on the mined space. The mining efficiency can be effectively improved, and the productivity is improved.

Description

Technical Field

[0001] The invention relates to the technical field of mining, in particular to a mining method for ore extraction in staged rock drilling followed by filling. Background Art

[0002] An ore body refers to a geological body that contains a sufficient amount of ore and has mining value. Mining refers to the extraction of ore from a block (or mining area). When conducting mining operations, the stope is generally arranged first, a series of tunnels are excavated, such as ventilation and pedestrian tunnels, and the stope is arranged at the bottom of the ore body. The top plate of the stope is the bottom of the ore body. After that, the stope is cemented. After the cement bottom hardens, upward mining can be carried out. In related technologies, when mining upward, the operators enter the stope space, drill blast holes on the top plate, and then charge and blast in the blast holes. After the blasting is completed, the staff enters the stope space to pry the slag and remove the danger, and use columns or anchors to support the top plate. After mining and transporting the fallen ore, the operators enter the stope space again, drill blast holes, blast and support the new top plate, and repeat until the stope is mined. At present, the upward layered filling method is usually used for ore bodies with a thickness greater than 5m and less than 20m and an inclination greater than 40°. Personnel work under the directly exposed roof, which has poor safety, and there is only one working face, resulting in low mining efficiency and low mining area production capacity. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a mining method for ore-drilling in a segmented rock drilling stage followed by backfilling, which can effectively improve the mining efficiency and increase the production capacity.

[0004] According to an embodiment of the first aspect of the present invention, a mining method of segmented rock drilling and subsequent filling includes: mining preparation, rock drilling and blasting, mining, and filling. Mining preparation: the ore body is divided into multiple mining areas along the direction of the ore body, with ore pillars left between the mining areas adjacent in the horizontal direction, and roof pillars left between the mining areas adjacent in the vertical direction. A plurality of segmented rock drilling tunnels extending along the direction of the ore body are opened at intervals in the upper and lower parts of the mining area, and a transportation tunnel connected to the segmented rock drilling tunnel is opened outside the mining area; Rock drilling and blasting: the ore above the segmented rock drilling tunnel is drilled and blasted in sequence along the extension direction of the segmented rock drilling tunnel, and the ore above the segmented rock drilling tunnel with a shallow depth is mined first, so that the ore below the corresponding segmented rock drilling tunnel can support the rock drilling and blasting equipment during rock drilling; Ore discharge: the blasted ore is transported to the ground through the transportation tunnel; Filling: retaining walls are set in the transportation tunnel to fill the space after mining.

[0005] A mining method for filling the ore after the segmented rock drilling stage according to an embodiment of the present invention has at least the following beneficial effects: compared with the upward layered filling method in the prior art, the rock drilling and blasting steps can be carried out simultaneously in multiple segmented rock drilling tunnels most of the time, and the upward layered filling method is to carry out rock drilling, blasting and transportation in a single tunnel, so the amount of ore in a single blasting in the present invention is greatly increased, which can effectively maintain high production efficiency.

[0006] According to some embodiments of the present invention, fixed wireless communication base stations and mobile wireless communication base stations are provided in the segmented rock drilling tunnel and the transport tunnel; in the rock drilling and blasting step, an intelligent rock drilling trolley with a remote wireless control function is used for rock drilling, and a remote-controlled charging trolley with a remote wireless control function is used for loading explosives; in the mining step, a remote-controlled shovel loader with a remote wireless control function is used for transportation, so as to realize unmanned automated intelligent mining.

[0007] According to some embodiments of the present invention, the rock drilling and blasting step is not performed on the connected stope before the filling step is completed on the stope.

[0008] According to some embodiments of the present invention, the rock drilling and blasting step and the mining step are performed simultaneously in the non-adjacent stopes.

[0009] According to some embodiments of the present invention, the stope is ventilated from bottom to top after the rock drilling and blasting step.

[0010] According to some embodiments of the present invention, after the rock drilling and blasting step, unstable areas in the stope are reinforced.

[0011] According to some embodiments of the present invention, the reinforcement of unstable areas in the mining area includes one or more of the following steps: installing short anchor rods to protect the roof, installing short anchor rods and anchor nets for combined support, excavating short through veins at unstable roof plates and reinforcing the top wall of the mining area by prestressed anchor cables.

[0012] According to some embodiments of the present invention, the transport tunnel includes a through-vein tunnel, a loading access tunnel, a mine-discharging tunnel, and a chute. The chute is vertically arranged and the lower end of the chute is connected to the mine-discharging tunnel. The mine-discharging tunnel is horizontally opened and extends along the direction of the ore body. The mine-discharging tunnel is used to transport ore to the ground, the loading access tunnel is used to connect the lowest segmented rock drilling tunnel and the mine-discharging tunnel, and the through-vein tunnel is used to connect the segmented rock drilling tunnel and the chute.

[0013] According to some embodiments of the present invention, adjacent vein-crossing tunnels are connected in the horizontal direction via segmented transport tunnels.

[0014] According to some embodiments of the present invention, the rock drilling and blasting step is to drill a plurality of fan-shaped holes upward in the segmented rock drilling tunnel, fill the fan-shaped holes with explosives, and blast the ore.

[0015] A method for mining by subdividing the rock into sections and then filling the rock in the subsequent drilling process according to an embodiment of the present invention has at least the following beneficial effects:

[0016] (1) In multiple segmented rock drilling tunnels, the rock drilling and blasting steps can be carried out simultaneously most of the time, and the amount of ore blasted in a single blasting is greatly increased, which can effectively maintain high production efficiency;

[0017] (2) Use intelligent rock drilling rigs, intelligent charging rigs and intelligent scrapers with remote wireless control functions to achieve unmanned automated intelligent mining, which can improve work efficiency while reducing the risk of injury to mining employees;

[0018] (3) The bottom-up exhaust method can effectively and quickly exhaust dust and prevent dust from accumulating under the action of gravity.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0021] Figure 1 It is an implementation layout diagram of a mining method for mining in a staged rock drilling phase followed by backfilling according to an embodiment of the present invention;

[0022] Figure 2 for Figure 1 The cross-section along line II-II;

[0023] Figure 3 for Figure 1 The cross section along line III-III in the middle;

[0024] Figure 4 for Figure 1 Sectional view along line IV-IV.

[0025] Figure Number:

[0026] Stope 100, mine pillar 101, top pillar 110;

[0027] 200 staged rock drilling tunnels;

[0028] Transport tunnel 300, vein tunnel 310, ore loading tunnel 320, ore exit tunnel 330, chute 340;

[0029] Prestressed anchor cable 400;

[0030] Staged transport lane 500;

[0031] Scalloped holes 600;

[0032] Gravel 700;

[0033] Filling 800. DETAILED DESCRIPTION

[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0035] In the description of the present invention, it should be understood that descriptions involving orientation, such as orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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.

[0036] In the description of the present invention, "a plurality" means more than two. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0037] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0038] Reference Figures 1 to 4As shown, a mining method for mining in a segmented rock drilling stage followed by filling in an embodiment of the present invention includes the following steps: mining preparation, rock drilling and blasting, mining, and filling. The mining preparation step is: dividing the ore body into multiple stopes 100 along the direction of the ore body, each stope 100 is 60m long, 60m high, and has a width equal to the thickness of the ore body. A pillar 101 is left between adjacent stopes 100 in the horizontal direction, and the horizontal dimension of the pillar 101 is 3m. A top pillar 110 is left between adjacent stopes 100 in the vertical direction; the vertical dimension of the top pillar 110 is 6m. The adjacent stopes 100 are separated by the pillars 101 and the top pillars 110 to prevent the filling in the stope 100 from affecting the work of the adjacent stopes 100. A cutting slot drill is used to cut a skylight for ventilation, and the skylight also has functions such as drainage and lighting. Multiple segmented rock drilling tunnels 200 extending along the ore body are opened at intervals in the upper and lower parts of the mining area 100, and the number of segmented rock drilling tunnels 200 set in each mining area 100 is 3. The intervals between the segmented rock drilling tunnels 200 determine the depth of the fan-shaped holes 600. Therefore, the intervals between the segmented rock drilling tunnels 200 are determined by geological conditions to meet the needs of smooth rock drilling and blasting. The intervals between the segmented rock drilling tunnels 200 are preferably 15m-20m, and the cross-sectional dimensions of the segmented rock drilling tunnels 200 should be able to meet the needs of equipment such as rock drilling trolleys and charging trolleys. A transportation tunnel 300 connected to the segmented rock drilling tunnel 200 is opened outside the mining area 100; the function of the transportation tunnel 300 is to facilitate the entry and exit of equipment and ore into and out of the segmented rock drilling tunnel 200. The rock drilling and blasting steps are: rock drilling and blasting the ore above the segmented rock drilling tunnel 200 in sequence along the extension direction of the segmented rock drilling tunnel 200. The segmented rock drilling tunnel 200 divides the ore body in the mining area 100 from top to bottom into an upper segment, a middle segment, and a lower segment. The ore above the segmented rock drilling tunnel 200 with a shallow depth, i.e., the ore of the upper segment, is mined first, so that the ore below the corresponding segmented rock drilling tunnel 200 can support the rock drilling and blasting equipment during rock drilling. The mining direction of the upper segment, the middle segment, and the lower segment is the same. The upper segment is mined 4-6m before the middle segment is mined, and the middle segment is mined 4-6m before the lower segment is mined, so that when the upper segment is subjected to the rock drilling and blasting steps, the ore body of the middle segment can provide a support surface for equipment such as the rock drilling trolley and the charging trolley. The working surfaces of the upper segment, the middle segment, and the lower segment jointly form an inclined surface inclined in the mining direction. Compared with the upward layered filling method in the prior art, the three segmented rock drilling tunnels 200 in the present invention can simultaneously perform rock drilling and blasting steps most of the time, while the upward layered filling method performs rock drilling, blasting and transportation in a single tunnel. Therefore, the amount of ore in a single blasting in the present invention is greatly increased, and high production efficiency can be effectively maintained. The mining step is: transporting the blasted ore to the ground through the transportation tunnel 300; the filling step is: setting a retaining wall in the transportation tunnel 300, and using the tailings in the ore dressing plant or the waste rock generated by the development of various tunnels to fill the space after mining. Figure 1 As shown, the filling material 800 is filled into the space after mining in the stope. The three segmented rock drilling tunnels 200 of the present invention can simultaneously perform rock drilling and blasting steps most of the time. When mining the same amount of ore, compared with the upward layered filling method, the number of cycles of the rock drilling and blasting steps can be reduced, and the mining time can be reduced by more than 60%, which greatly improves the mining efficiency.

[0039] Reference Figures 1 to 4 As shown, it can be understood that fixed wireless communication base stations and mobile wireless communication base stations are set in the segmented rock drilling tunnels and transportation tunnels. In the rock drilling and blasting steps, an intelligent rock drilling trolley with remote wireless control function is used for rock drilling, and a remote-controlled charging trolley with remote wireless control function is used to install explosives. In the mining step, a remote-controlled scraper with remote wireless control function is used for transportation to realize unmanned automated intelligent mining. Fixed wireless communication base stations and mobile wireless communication base stations form a wireless communication system to provide a wireless network and reduce the risk of disconnection. The wireless communication system is connected to the external network through an optical fiber ring network to transmit signals to the intelligent rock drilling trolley, intelligent charging trolley, and intelligent scraper. The optical fiber ring network not only has the high-speed transmission capability of optical fiber, but also can ensure the normal operation of other main network nodes after any node or cable fails. The reliability of communication under complex conditions underground is guaranteed. To ensure that personnel do not enter the dangerous area inside the mining site, multiple equipment transmit data through a wireless network, and multiple mining sites and multiple equipment are linked and coordinated. While improving work efficiency, it can also reduce the risk of injury to mining employees.

[0040] Reference Figures 1 to 4 As shown, it is understandable that the rock drilling and blasting step is not performed on the adjacent stope 100 before the stope 100 completes the filling step. When blasting is performed in one stope 100, the vibration generated by the blasting may affect the adjacent stope 100, causing the falling of gravel or collapse, resulting in injuries to personnel and damage to equipment. In order to ensure the stability of the underground structure, it is necessary not to perform the rock drilling and blasting step on the adjacent stope 100 before the stope 100 completes the filling step.

[0041] Reference Figures 1 to 4As shown, it can be understood that non-adjacent stopes 100 simultaneously carry out rock drilling and blasting steps and ore extraction steps to improve work efficiency. Multiple stopes 100 can be further grouped into one-step stopes 100 and two-step stopes 100, and the one-step stopes 100 and the two-step stopes 100 are arranged alternately. It can be foreseen that in an ore body with a basic rock quality level of level I and level II, the stopes 100 included in the one-step stope 100 are not adjacent to each other in the horizontal direction, the stopes 100 included in the two-step stope 100 are not adjacent to each other in the horizontal direction, the stopes 100 included in the one-step stope 100 are adjacent in the vertical direction, and the stopes 100 included in the two-step stope 100 are adjacent in the vertical direction. The one-step stope 100 is mined first, and then the two-step stope 100 is mined. The order of mining in the stopes 100 in the first stope 100 is from bottom to top. After the first stope 100 is fully backfilled, the second stope 100 is mined. The order of mining in the stopes 100 in the second stope 100 is from bottom to top. The stopes 100 at the same height in the first stope 100 can simultaneously carry out the rock drilling and blasting steps and the ore-exiting steps to improve the mining efficiency. The stopes 100 at the same height in the second stope 100 can simultaneously carry out the rock drilling and blasting steps and the ore-exiting steps to improve the mining efficiency. The basic quality level of the rock mass is determined by the method in the engineering rock mass classification standard with the standard number of GB 50218-94.

[0042] It can be foreseen that in the ore body with the basic rock quality level of level III and IV, the mining sequence of multiple stopes 100 is: first, the stope 100 in the middle part of the entire ore body is mined from bottom to top, and then the stopes 100 in the two wing directions are mined, so that the stopes 100 mined at the same time are distributed to form an upward arch, so as to improve the stability of the ore body and reduce the collapse and instability of the surrounding rock above.

[0043] Reference Figures 1 to 4 As shown, it can be understood that a horizontal filling return air tunnel is opened at the top of the stope 100 along the direction of the ore body. The filling return air tunnel is used for ventilation. The filling return air tunnel is also used for waste rock and tailings to pass through and fill the stope 100 below. After the rock drilling and blasting steps, the stope 100 is ventilated from bottom to top. After the ore body is blasted, the blower sends air into the segmented rock drilling tunnel 200 below, and then the air passes through the stope 100 after the blasting, and then is extracted through the filling return air tunnel. The skylight can be connected to the filling return air tunnel to discharge the air carrying dust underground. The use of a bottom-up exhaust method can effectively and quickly discharge dust and prevent dust from accumulating under the action of gravity.

[0044] Reference Figures 1 to 4As shown, it can be understood that after the rock drilling and blasting step, the unstable parts in the stope 100 are reinforced. Since the ore body is inclined, the unstable surface is usually the surrounding rock outside the ore body that is inclined toward the ore body. Before the ore extraction step, the surrounding rock is reinforced to prevent the surrounding rock from collapsing when the ore extraction step is performed.

[0045] Reference Figures 1 to 4 As shown, it can be understood that reinforcing the unstable parts in the stope 100 includes one or more of the following steps: installing short anchor rods to protect the top, installing short anchor rods and anchor nets for joint support, driving short through veins at unstable top plates, and reinforcing the top wall of the stope 100 by means of prestressed anchor cables 400. When the basic quality level of the rock mass is level I, the risk of collapse is low, and no reinforcement or a small amount of short anchor rods for top protection can be performed. When the basic quality level of the rock mass is level II, the risk of collapse is low, and short anchor rods can be installed at unstable places to protect the top for reinforcement. When the basic quality level of the rock mass is level III, the risk of collapse is high, and short anchor rods and anchor nets can be installed at unstable places for joint support for reinforcement. When the basic quality level of the rock mass is level IV, the risk of collapse is high, and short anchor rods and anchor nets can be installed at unstable places for joint support for reinforcement, and short through veins can be driven at unstable top plates, and the top wall of the stope 100 can be reinforced by means of prestressed anchor cables 400. The plurality of prestressed anchor cables 400 are distributed in a fan shape. The prestressed anchor cables 400 are anchored into the rock mass through holes in the weak structural surface of the rock mass by anchor heads, connecting the unstable part at the top of the stope 100 with the stable rock layer, thereby changing the stress state of the slope rock mass and improving the integrity and strength of the unstable rock mass of the slope.

[0046] Reference Figures 1 to 4 As shown, it can be understood that the transport tunnel 300 includes a through-vein tunnel 310, a loading access tunnel 320, a mine-discharging tunnel 330, and a chute 340. The chute 340 is vertically arranged and the lower end of the chute 340 is connected to the mine-discharging tunnel 330. The inclination direction of the ore body should be toward the chute 340. The mine-discharging tunnel 330 is horizontally opened and extends along the direction of the ore body. The mine-discharging tunnel 330 is located at the same horizontal plane as the lowest segmented rock drilling tunnel 200. The mine-discharging tunnel 330 is connected to the ground outlet. The mine-discharging tunnel 330 is used to transport ore to the ground, the loading access tunnel 320 is used to connect the lowest segmented rock drilling tunnel 200 and the mine-discharging tunnel 330, and the through-vein tunnel 310 is used to connect the segmented rock drilling tunnel 200 and the chute 340. The purpose of setting up the through-vein tunnel 310 is to facilitate the transportation of ore accumulated in the segmented rock drilling tunnel 200 after blasting to the mine exit tunnel 330 or to transport it to the mine exit tunnel 330 through the chute 340. The through-vein tunnel 310 can also provide a passage for the intelligent rock drilling trolley and the intelligent charging trolley entering and exiting the segmented rock drilling tunnel 200. The function of the ore loading tunnel 320, the mine exit tunnel 330, and the chute 340 is to transport as much ore as possible and improve the efficiency of transportation. Figure 1As shown, due to the effect of gravity, most of the small pieces of crushed stone 700 produced after blasting will accumulate in the lowest segmented rock drilling tunnel 200, so a plurality of ore loading access tunnels 320 can be arranged at equal intervals in a mining field 100 to improve the efficiency of ore transportation.

[0047] Reference Figures 1 to 4 As shown, it can be understood that adjacent vein tunnels 310 are connected in the horizontal direction through the segmented transport tunnel 500. The segmented transport tunnel 500 connects the various stopes 100 in the horizontal direction, so as to facilitate the transfer of equipment such as the intelligent rock drilling trolley, the intelligent charging trolley and the intelligent scraper to the next stope 100 to be mined after the mining of the stope 100 is completed. In the filling step, retaining walls are set in the segmented transport tunnel and the mining tunnel 330 to block the tailings and waste rock, so that the tailings and waste rock can effectively fill the stope after mining.

[0048] Reference Figures 1 to 4 As shown, it can be understood that the rock drilling and blasting step is to drill a plurality of fan-shaped holes 600 upward in the segmented rock drilling tunnel 200, fill the fan-shaped holes 600 with explosives, the fan-shaped holes 600 have a diameter of 76 mm and a depth of 4 m-9 m, and blast the ore. The plurality of fan-shaped holes 600 are arranged in a plurality of rows along the extension direction of the ore body, and the spacing between each row of fan-shaped holes 600 is 2.2 m, and the explosives in two or three rows of fan-shaped holes 600 are blasted each time.

[0049] It can be foreseen that the ore bodies in the upper segment, the middle segment and the lower segment are divided into multiple mining areas at equal intervals along the extension direction of the ore bodies, and the explosives in the fan-shaped holes 600 in each mining area are detonated simultaneously. The mining area in the upper segment can be aligned with the mining area in the middle segment in the vertical direction, and the mining area in the lower segment can be aligned with the mining area in the middle segment in the vertical direction. During mining, the upper segment first blasts a mining area, then transports the ore, and then blasts the mining area in the middle segment directly below the mining area and the mining area adjacent to the mining area in the horizontal direction. During the mining process, after a mining area is blasted, the mining area directly below it and the mining area adjacent to it in the horizontal direction are the mining areas to be blasted next time. Each mining field 100 needs to be mined from the mining area at the edge of the upper segment.

[0050] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A mining method for mining by subdividing the ore into subdivided stages and then filling the ore, characterized in that: The following steps are involved: Mining preparation: dividing the ore body into a plurality of stopes (100) along the direction of the ore body, leaving ore pillars (101) between the stopes (100) adjacent in the horizontal direction, leaving top pillars (110) between the stopes (100) adjacent in the vertical direction, opening a plurality of segmented rock drilling tunnels (200) extending along the direction of the ore body at intervals in the upper and lower parts of the stope (100), and opening a transport tunnel (300) connected to the segmented rock drilling tunnel (200) outside the stope (100); Rock drilling and blasting: rock drilling and blasting are performed on the ore above the segmented rock drilling tunnel (200) in sequence along the extension direction of the segmented rock drilling tunnel (200), and the ore above the segmented rock drilling tunnel (200) with a shallow depth is mined first, so that the ore below the corresponding segmented rock drilling tunnel (200) can support the rock drilling and blasting equipment during rock drilling; Ore unloading: transporting the blasted ore to the surface through the transport tunnel (300); Filling: a retaining wall is set in the transport tunnel (300) to fill the space after mining.

2. The method for mining by subdividing the rock into sections and then filling the rock after drilling according to claim 1, characterized in that: A fixed wireless communication base station and a mobile wireless communication base station are arranged in the segmented rock drilling tunnel (200) and the transport tunnel (300). In the rock drilling and blasting step, an intelligent rock drilling trolley with a remote wireless control function is used for rock drilling, and a remote-controlled charging trolley with a remote wireless control function is used for loading explosives. In the mining step, a remote-controlled shovel loader with a remote wireless control function is used for transportation, so as to realize unmanned automated intelligent mining.

3. The method for mining by subdividing the rock into sections and then filling the rock after the subdividing the rock into sections according to claim 1, characterized in that: The rock drilling and blasting step is not performed on the connected stope (100) before the filling step is completed in the stope (100).

4. The method for mining by subdividing the rock into sections and then filling the rock after drilling according to claim 1, characterized in that: The non-adjacent stopes (100) simultaneously carry out the rock drilling and blasting step and the ore extraction step.

5. The method for mining by subdividing the rock into sections and then filling the rock after drilling according to claim 1, characterized in that: After the rock drilling and blasting step, the stope (100) is ventilated from bottom to top.

6. The method for mining by subdividing the rock into sections and then filling the rock after the subdividing the rock into sections according to claim 1, characterized in that: After the rock drilling and blasting step, unstable areas in the stope (100) are reinforced.

7. The method for mining by subdividing the rock into sections and then filling the rock after drilling according to claim 6, characterized in that: The reinforcement of unstable areas in the mining area (100) comprises one or more of the following steps: installing short anchor rods to protect the roof, installing short anchor rods and anchor nets for combined support, excavating short through-veins at unstable roof plates, and reinforcing the top wall of the mining area (100) by means of prestressed anchor cables (400).

8. The method for mining by subdividing the rock into sections and then filling the rock after drilling according to claim 1, characterized in that: The transport tunnel (300) comprises a through-vein tunnel (310), a loading access tunnel (320), a mine-discharging tunnel (330), and a chute (340). The chute (340) is vertically arranged and the lower end of the chute (340) is connected to the mine-discharging tunnel (330). The mine-discharging tunnel (330) is horizontally opened and extends along the direction of the ore body. The mine-discharging tunnel (330) is used to transport ore to the ground. The loading access tunnel (320) is used to connect the lowest segmented rock drilling tunnel (200) and the mine-discharging tunnel (330). The through-vein tunnel (310) is used to connect the segmented rock drilling tunnel (200) and the chute (340).

9. The method for mining by subdividing the rock into sections and then filling the rock after the subdividing the rock into sections according to claim 8, characterized in that: The adjacent vein-penetrating lanes (310) are connected in the horizontal direction via a segmented transport lane (500).

10. The method for mining by subdividing the rock into multiple stages and then filling the rock after the subdividing the rock into multiple stages according to claim 1, characterized in that: The rock drilling and blasting step comprises drilling a plurality of fan-shaped holes (600) upward in the segmented rock drilling tunnel (200), filling the fan-shaped holes (600) with explosives, and blasting the ore.

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