Upward continuous sublevel rock drilling stage ore removal subsequent filling mining method

Abstract

The invention discloses an upward continuous sublevel rock drilling stage ore removal subsequent filling mining method, which comprises the following steps of: 1) dividing an ore body into a plurality of continuous chambers, namely cemented filling chambers and non-cemented filling chambers which are arranged at intervals; the vertical direction of the ore block is a stage height, and is divided into a plurality of sections along the stage height; (2) the cemented filling chambers are firstly mined in a segmented mode from bottom to top, then the non-cemented filling chambers are mined, and the cemented filling chambers are mined at the segmented height one segment height prior to the non-cemented filling chambers; and (3) each section comprises a rock drilling roadway and an undercutting trench roadway, and a perforation area shared by the undercutting trench roadway of the lower section and the rock drilling roadway of the upper section forms a perforation unit. According to the method, the roof is formed through segmented drilling blast hole design, local stress concentration is reduced, surrounding rock deformation is delayed, disturbance influences are reduced, and the stoping efficiency and the overall stability are improved.

Description

Technical Field

[0001] This invention relates to a mining method, and more particularly to a mining method for subsequent backfilling after ore extraction in an upward continuous segmented drilling stage. Background Technology

[0002] The upward continuous segmented drilling staged ore extraction followed by backfilling mining method and roof-connection technology is a modern mining approach that combines deep-hole blasting, segmented drilling, staged ore extraction, and backfilling processes. Through structural parameter optimization, graded application of backfill materials, and innovation in blasting techniques, it gradually achieves the goal of safe, efficient, and low-cost green mining. The upward continuous segmented drilling staged ore extraction followed by backfilling mining method improves drilling and ore extraction efficiency, reduces disturbance to the surrounding rock, lowers ground pressure risks, adapts to changes in ore body morphology, and reduces ore dilution. Cemented and non-cemented backfill stops are arranged alternately. Cemented backfill stops are mined first from bottom to top, followed by non-cemented backfill stops. At each segment height, cemented backfill stops are mined one segment height ahead of non-cemented backfill stops. Cemented materials possess certain compressive strength and bonding properties, providing medium-strength support for mining areas or structures. Non-cemented materials have relatively simple construction processes and fast construction speeds, which can shorten the construction cycle and improve construction efficiency. High-strength cemented materials, due to their high compressive strength and bonding properties, can provide more stable support for mining areas or structures, effectively preventing accidents such as roof collapse and slope collapse. The zoned application of high-strength cemented filling, cemented filling, and non-cemented filling ensures operational safety while reducing production costs.

[0003] Traditional backfilling and roof connection methods rely on material performance and process optimization, and the roof connection rate depends on manual intervention. Slurry settling and segregation can easily lead to empty roofs, affecting roof stability, and making it difficult to achieve complete roof connection under complex geological conditions. Among traditional backfilling and roof connection methods, gravity-flow roof connection utilizes the gravity-flow characteristics of the backfill slurry to fill the goaf through natural flow, but it is prone to empty roofs due to slurry settling, resulting in unstable roof connection effects. Pressurized roof connection uses pumping equipment to pressurize the backfill material, causing it to flow into the roof connection space along pipelines, but the equipment is complex, costly, and difficult to construct. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a mining method with high resource utilization, strong adaptability, safety and reliability, which is a continuous upward segmented rock drilling stage followed by backfilling.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention includes the following steps: 1) The ore body is divided into several continuous ore rooms, which are cemented filling ore rooms and non-cemented filling ore rooms arranged at intervals; the vertical direction of the ore block is the stage height, and it is divided into several segments along the stage height; 2) Mining cemented backfilled ore chambers in sections from bottom to top, followed by mining uncemented backfilled ore chambers. At each section height, cemented backfilled ore chambers are mined one section height higher than uncemented backfilled ore chambers. 3) Each segment includes a drilling tunnel and a bottom trench tunnel. The drilling area shared by the bottom trench tunnel of the lower segment and the drilling tunnel of the upper segment constitutes a drilling unit. During mining, each drilling unit drills upward fan-shaped medium-deep blast holes from the bottom trench tunnel and the drilling tunnel to drill and blast the subdivided ore body. 4) After the cemented or non-cemented filling ore body is mined out, a filling borehole is drilled downward from the filling approach of the drilling unit to fill the void. 5) After continuous mining and filling from bottom to top to the uppermost section, the uppermost roof is formed by designing and drilling blast holes; 6) Arrange the uppermost section filling access route in the uppermost section of the ore body, and construct the uppermost filling borehole and the uppermost filling venting borehole through the uppermost section filling access route to the stope.

[0006] Furthermore, in step 3), the cemented filling stope is mined by indirect mining blasting; the non-cemented filling stope is mined first on one side of the cemented filling stope, and then the other side of the cemented filling stope is mined.

[0007] Furthermore, in step 3), the blasted ore is extracted from the ore extraction tunnel.

[0008] Furthermore, in step 4), the void filling process involves high-strength cemented filling of the bottom and top of the stope void at every interval from bottom to top, with the remaining parts being cemented filling; the filling process for non-cemented stopes is the same as that for cemented stopes, with high-strength cemented filling of the bottom and top of the non-cemented stope void at every interval from bottom to top, with the remaining parts being non-cemented filling.

[0009] Furthermore, the high-strength cemented backfill is used in the bottom 5-10m and top 5-10m of the medium-thick ore body; and in the bottom 10-15m and top 5-10m of the thick ore body.

[0010] Furthermore, in step 5), the uppermost top plate is an irregularly shaped top plate; the irregularly shaped top plate is stepped, with one side boundary of the upper platform located below the uppermost filling borehole discharge port, and the lower platform facing the other side at a downward slope.

[0011] Furthermore, the location of the uppermost filling borehole discharge port is on the intersection line between the boundary of the irregular top plate and the boundary of the adjacent two-step mining body, which is 2-3m above the boundary of the platform.

[0012] Furthermore, the lower surface of the irregularly shaped top plate has a slope of 3 to 4 degrees.

[0013] Furthermore, the irregular roof plate forms a step 3-5m above the rock drilling chamber on one side of the boundary of the adjacent two mining steps, and the step height is 1.5-2m.

[0014] Furthermore, both the uppermost filling boreholes and the uppermost filling venting boreholes are designed in rows along the strike of the stope, with the uppermost filling venting borehole rows located between the uppermost filling borehole rows; the uppermost filling boreholes extend obliquely downwards to the boundary between the lower segment stope and the previous strike stope of the lower segment, with the discharge port located at the boundary of the previous strike stope of the lower segment; the row spacing of the uppermost filling boreholes in the medium-thick ore body is half the length of the stope; the row spacing of the uppermost filling boreholes in the thick ore body is 20-25m.

[0015] The beneficial effects of adopting the above technical solution are as follows: This invention takes the mining process and cutting engineering of the top-to-bottom continuous segmented rock drilling stage and subsequent backfilling method as the starting point, makes full use of the original mining preparation and cutting engineering design for backfilling boreholes, and forms the roof through segmented rock drilling borehole design, thereby reducing local stress concentration, delaying surrounding rock deformation, reducing disturbance impact, improving mining efficiency and overall stability, and can economically and effectively solve the problems of high safety risk and poor geological adaptability of traditional backfilling. Attached Figure Description

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0017] Figure 1 This is a cross-sectional view of the medium-thick ore body along the strike of the ore body in the upward continuous segmented drilling stage of this invention; Figure 2 This is a cross-section of the medium-thick ore body perpendicular to the ore body strike during the upward continuous segmented drilling stage of this invention; Figure 3 This is a diagram of the upward continuous segmented rock drilling stage of the present invention, showing the upward continuous excavation and filling of the lower section of the thick ore body; Figure 4 This is a diagram showing the excavation and filling of the uppermost section of a thick ore body in the upward continuous segmented rock drilling stage of this invention. Figure 5 This is a diagram illustrating the steps of excavation and filling of a medium-thick ore body stope in the upward continuous segmented rock drilling stage of this invention. Figure 6 This is a diagram of steps S1-S4 of the upward continuous segmented rock drilling stage for excavation and filling of medium-thick ore bodies in this invention. Figure 7 Figures S5-S7 show the steps S5-S7 of the upward continuous segmented rock drilling stage for excavation and filling of medium-thick ore bodies in this invention. Figure 8Figures S8-S12 show the steps of excavation and filling of the medium-thick ore body in the upward continuous segmented rock drilling stage of this invention.

[0018] Figure 9 This is a cross-sectional view of the thick ore body along the strike of the ore body in the upward continuous segmented drilling stage of this invention; Figure 10 This invention provides a vertical cross-section of the ore body perpendicular to the strike of the thick ore body in the upward continuous segmented drilling stage. Figure 11 This is a diagram showing the perforation and blasting of the lowest stope in a thick ore body during the upward continuous segmented drilling stage of this invention. Figure 12 This is a diagram showing the filling of the lowest stope and the perforation of the upper stope in the thick ore body during the upward continuous segmented drilling stage of this invention. Figure 13 This invention relates to the blasting and filling of the upper stope of a thick ore body in the upward continuous segmented drilling stage and the perforation diagram of the uppermost stope. Figure 14 This is a diagram of the blasting and filling of the uppermost stope of a thick ore body in the upward continuous segmented drilling stage of this invention. Figure 15 This is a diagram illustrating the steps of excavation and filling of a thick ore body stope in the upward continuous segmented rock drilling stage of this invention. Figure 16 This is Figure S1, which shows the steps of the upward continuous segmented rock drilling stage for thick ore body excavation and backfilling in this invention. Figure 17 This is a diagram of steps S2-S5 of the upward continuous segmented rock drilling stage for thick ore body excavation and filling in this invention. Figure 18 This is a diagram of steps S6-S12 of the upward continuous segmented rock drilling stage for thick ore body excavation and filling in this invention. Figure 19 This is a schematic diagram of the shape and structure of the irregular top plate described in this invention.

[0019] In the diagram: 1-Ladi Gutter Roadway, 2-Mining Roadway, 3-Drilling Roadway, 4-Mining Access Roadway, 5-Uppermost Stope Pillar, 6-Uppermost Sectional Filling Access Roadway, 7-Uppermost Sectional Filling Roadway, 8-Irregular Roof, 81-Upper Platform, 82-Connecting Face, 83-Lower Platform, 9-Uppermost Filling Drill Hole, 10-Uppermost Filling Venting Drill Hole, 11-Lower Sectional Filling Roadway, 12-Lower Sectional Filling Access Roadway, 13-Lower Sectional Filling Drill Hole, L1- Cemented filling stope, L2-uncemented filling stope, H-stage height, B-orebody width, I-lowest section perforation, II-lowest section ore pile, III-lowest section stope filling, IV-middle section perforation, V-middle section ore pile, VI-middle section stope filling, VII-upper section perforation, VIII-upper section ore pile, IX-upper section stope filling, B-cemented filling body, NB-uncemented filling body, HB-high-strength cemented filling body. Detailed Implementation

[0020] Figures 1-18 middle, Figure 1 , 5 Numbers 6, 7, 8, 9, 15, 16, 17, and 18 are front views along direction AA. Figure 2 , 3 1, 2, 3, and 4 are front views of the BB direction.

[0021] Figures 1-18 As shown, the upward continuous segmented drilling stage followed by backfilling mining method includes the following steps: 1) Stopes and stages: For medium-thick ore bodies with a thickness of 5-20m, stops are set along the strike of the ore body, i.e., the strike of the stops is the same as the strike of the ore body; for thick ore bodies with a thickness of 20-50m, stops are set horizontally perpendicular to the strike of the ore body, i.e., the strike of the stops is perpendicular to the strike of the ore body; according to the strike of the ore body, it is divided into several continuous stops, namely cemented backfill stops and non-cemented backfill stops, with cemented backfill stops and non-cemented backfill stops arranged alternately, such as... Figure 1 As shown. The vertical direction of the ore block is the stage height, and it is divided into several segments along the stage height.

[0022] 2) Mining sequence: Cemented-filled stops are mined in sections from bottom to top, followed by uncemented-filled stops. At each section height, cemented-filled stops are mined one section height ahead of uncemented-filled stops. For cemented-filled stops mined in one step, indirect mining blasting is used, i.e., mining one stop every other section. For uncemented-filled stops, one side of the cemented-filled stop is mined first, followed by the other side, i.e., mining one stop every three sections. The mining steps for medium-thick ore bodies are as follows: Figure 5 The steps for mining thick ore bodies are as follows: Figure 15 In the diagram, S1 to S12 represent the mining sequence of the ore chamber.

[0023] 3) Mining process: Each section includes a drilling roadway 3 and a bottom-cutting trench roadway 1. The drilling roadway 3 is located within the ore body, and the bottom-cutting trench roadway 1 is located outside the footwall of the ore body. Within the same section, two adjacent stops share a single ore extraction roadway 2. The bottom-cutting trench roadway 1 is connected to the ore extraction roadway 2 via an ore extraction access roadway 4. The drilling areas shared by the bottom-cutting trench roadway 1 of the lower section and the drilling roadway 3 of the upper section constitute a drilling unit. Among them, adjacent cemented-backed stops constitute a cemented-backed stope drilling unit, and adjacent non-cemented-backed stops constitute a non-cemented-backed stope drilling unit.

[0024] During mining, each drilling unit, namely the lower section's bottom-cutting ditch roadway 1 and the upper section's drilling roadway 3, involves drilling upward-facing fan-shaped medium-deep blast holes. Thus, the drilling and blasting areas of the lower section's bottom-cutting ditch roadway 1 and the upper section's drilling roadway 3 constitute a blasting unit. Adjacent cemented-filled ore blocks form cemented-filled ore block blasting units, and adjacent non-cemented-filled ore blocks form non-cemented-filled ore block blasting units. Each blasting unit involves drilling, blasting, and caving to break up the ore body into sections. The blasted ore is extracted from the ore extraction roadway 2.

[0025] The uppermost section of the medium-thick ore body has only upward-facing fan-shaped medium-deep blast holes drilled in the Ladiqiangou roadway 1; the uppermost section of the thick ore body has upward-facing fan-shaped medium-deep blast holes drilled in both the Ladiqiangou roadway 1 and the drilling roadway. The lowermost section of the thick ore body has only the Ladiqiangou roadway 1 in its stope, while the other stopes all have drilling roadways 3 and Ladiqiangou roadways 1; all stopes of the medium-thick ore body have both bottom roadways and drilling roadways.

[0026] 4) Void Filling: After the ore body of each blasting unit stope is extracted, filling boreholes are drilled downwards from the filling approach of the upper section for void filling. Cemented filling stopes are filled with cemented cement, and non-cemented filling stopes are filled with non-cemented ... The high-strength cemented backfill is used in the bottom 5-10m and top 5m of the medium-thick ore body; and in the bottom 10-15m and top 5-10m of the thick ore body.

[0027] 5) Uppermost Roof Segment: Each segment is continuously mined and filled from bottom to top. After mining to the uppermost segment, a topmost roof is formed above the uppermost stope pillar 5 by drilling blast holes. The uppermost roof is a shaped roof 8. The shaped roof of the thick ore body is stepped, consisting of an upper platform 81, a lower platform 83, and a connecting surface 82 between them. One boundary of the upper platform is located below the discharge port of the uppermost filling borehole. The discharge port of the uppermost filling borehole of the thick ore body is located on the intersection line between the upper platform boundary and the boundary of the adjacent two-step mining body, 2-3m above the upper platform boundary. The shaped lower platform of the thick ore body has a downward slope of 3-4° on the other side, extending to the stope boundary. The width of the upper platform is 4-6m, and the vertical height of the connecting surface, i.e., the step height, is 1.5-2m. The lower platform is located in the direction of the preceding stope, and the upper platform is located in the direction of the following stope.

[0028] The irregular roof of the medium-thick ore body is an inverted V-shape. The location of the uppermost filling borehole discharge point of the medium-thick ore body is on the intersection line of the upper platform boundary and the boundary of the adjacent two-step mining body, 3-4m above the upper platform boundary. Taking the discharge point of the uppermost filling borehole 9 as the base point, the slopes on both sides spread outwards to the boundaries of the two side stops at 4-5° and 9-10° respectively, forming a "︹"-shaped roof at the top of the stop. The horizontal distance between the top of the slope and the lower boundary of the ore body is 4-6m, and the vertical distance between the bottom and top of the slope, i.e., the step height, is 1.5-2m.

[0029] 6) An uppermost filling access road 6 and an uppermost filling roadway 7 are arranged in the uppermost section of the ore body. Uppermost filling boreholes 9 and venting boreholes 10 are constructed through the uppermost filling access road 6 towards the stope. Both the uppermost filling boreholes 9 and venting boreholes 10 are designed in rows along the stope strike, with the uppermost filling and venting borehole rows located between the uppermost filling borehole rows. The uppermost filling boreholes 9 extend diagonally downwards to the boundary between the lower stope section and the stope section preceding the lower stope section, with the discharge port located at the boundary of the stope section preceding the lower stope section. The row spacing of the uppermost filling boreholes 9 in the medium-thick ore body is half the length of the stope. Ideally, the row spacing between the uppermost filling boreholes 9 and venting boreholes 10 is 9–13 m, and the borehole diameter of the uppermost filling borehole 9 is 150–200 mm. The spacing between the uppermost filling boreholes 9 of the thick ore body is 20-25m, and the diameter of the uppermost filling boreholes 9 is 150-200mm.

[0030] Example 1: The following specific steps are used in the upward continuous segmented rock drilling stage ore extraction and subsequent backfilling mining method.

[0031] Figures 1-8 As shown, for a medium-thick orebody with a thickness of 5–20 m, the stopes are arranged along the strike of the orebody. The orebody width B is 5–20 m, and it is divided into several continuous stops. Cemented and non-cemented stopes are arranged alternately. The length of cemented stope L1 and the length of non-cemented stope L2 are both 60 m. The stage height H is 60–120 m. Drilling roadway 3 and bottom-cutting trench roadway 1 are designed and arranged at a distance of 9–13 m from the top of the stope. Figure 1 As shown.

[0032] Indirect mining methods were employed for blasting of cemented-filled stopes. The blasting areas of the lower section's bottom trench roadway 1 and the upper section's drilling roadway 3 constituted a cemented-filled stope blasting unit. Upward-facing fan-shaped medium-deep boreholes were drilled from the bottom trench roadway 1 and the drilling roadway 3, forming the lowermost segment perforation I. Drilling and blasting were then used to break up the segmented ore body, forming the lowermost segment ore pile II. Filling was then carried out to form the lowermost stope filling III. Figure 3As shown. In the uppermost section of the medium-thick ore body, only fan-shaped medium-deep blast holes are drilled in the bottom trench 1, forming the uppermost section perforation VII. The ore is blasted, forming the uppermost section ore pile VIII, from which ore is extracted through the ore extraction roadway 2. Then, the uppermost section stope is filled IX, as shown. Figure 4 As shown. After the stope ore body is mined, the lower section filling slurry is used to fill the voids from the upper section filling roadway 11 of the rock drilling roadway to the lower section filling access roadway 12, and then to the lower section filling borehole 13 drilled downwards. From bottom to top, every segment, the bottom 5-10m and top 5m of the stope voids are filled with high-strength cemented slurry, and the remaining parts are filled with cemented slurry. Figure 6 and 7 As shown. The same procedures are used for excavation and backfilling of the non-cemented stopes. The cemented stopes are mined in stages from bottom to top, followed by the non-cemented stopes. At each sub-level height, the cemented stopes are mined one sub-level height ahead of the non-cemented stopes. The mining steps are as follows. Figure 5 As shown.

[0033] After mining to the uppermost section, blast holes are designed to form the uppermost irregular roof 8. The uppermost section of the ore body is then equipped with an uppermost filling access roadway 6 and an uppermost filling roadway 7. The uppermost filling borehole 9 is constructed below the uppermost filling access roadway 6 towards the stope. The uppermost irregular roof 8 is laid out according to the location of the discharge port of the uppermost filling borehole 9. The discharge port is located on the intersection line between the roof 3-4m above the roof and the footwall of the ore body. Using the discharge port of the uppermost filling borehole 9 as a base point, slopes of 4-5° and 9-10° extend outwards to the stope boundary on both sides, forming a 2m high step 3-5m from the footwall boundary of the ore body. Adjacent filling boreholes are spaced 30m apart, and the interval between filling boreholes and filling / venting boreholes is 9-13m. The borehole diameter is 150mm. Figure 8 As shown.

[0034] Example 2: The following specific steps are used in the upward continuous segmented rock drilling stage followed by backfilling mining method.

[0035] Figures 9-18 As shown, for a thick ore body with a thickness of 20–50 m, the stopes are set perpendicular to the strike of the ore body. The ore body width B is 20–50 m, divided into several continuous stops. Cemented and non-cemented stops are arranged alternately. The width of cemented stope L1 is 20–25 m, and the width of non-cemented stope L2 is 20–25 m. The stage height H is 60–120 m. Drilling roadways 3 and bottom-cutting trenches 1 are designed and arranged at a distance of 4–6 m from the top of the lower stopes. Figure 9 As shown.

[0036] Indirect mining methods are employed, including blasting to extract cemented-fill stopes. The blasting areas of the lower section's bottom trench roadway 1 and the upper section's drilling roadway 3 constitute a cemented-fill stope blasting unit. Upward-facing fan-shaped medium-deep boreholes are drilled from the bottom trench roadway 1 and the drilling roadway 3 to form the lowermost segment perforation I. Drilling and blasting are then used to break up the segmented ore body, forming the lowermost segment ore pile II. Then, the lowermost segment stope III is filled through the lowermost segment filling borehole 13. Figure 11 and 12 As shown. The lowest section of the thick ore body contains only the bottom-cutting channel 1. The middle section of the ore body has a drilling channel 3 within the ore body, and the bottom-cutting channel 1 is located outside the footwall of the ore body. Upward-facing fan-shaped medium-deep blast holes are drilled to form the middle section perforation IV. The two ore bodies share a single ore extraction channel 2. The ore pile V formed by blasting the ore in the middle section is extracted through ore extraction channel 2. Then, the middle section of the ore body is filled VI, as shown. Figure 12-14 As shown. A drilling roadway 3 is constructed within the uppermost stope body, and a bottom-cutting trench roadway 1 is constructed outside the footwall of the ore body. Upward-facing fan-shaped deep boreholes are drilled to form the uppermost stope VII. Ore is blasted to form the uppermost ore pile VIII. Ore is extracted from the uppermost stope and the adjacent next exit roadway 2. Then, the uppermost stope is filled IX, as shown. Figure 13 and 14 As shown.

[0037] After the stope ore body is extracted, filling boreholes are drilled downwards through a segmented filling approach in the self-drilling roadway 1 to fill the voids. From bottom to top, high-strength cemented filling is applied to the bottom 10-15m and top 5-10m of the stope voids at every segment, while the remaining areas are cemented filling. Figure 16 and 17 As shown; the same procedures are used, but a three-mining-one-mining method is selected for the excavation and filling of the non-cemented backfilling ore body. The cemented backfilling ore body is mined in stages from bottom to top, followed by the non-cemented backfilling ore body. At each sub-level height, the cemented backfilling ore body is mined one sub-level height ahead of the non-cemented backfilling ore body. The mining steps are as follows. Figure 15 As shown.

[0038] After mining to the uppermost section, blast holes are designed to form the uppermost irregular roof 8. An uppermost filling access road 6 and an uppermost filling roadway 7 are arranged in the uppermost section of the ore body. The uppermost filling borehole 9 is constructed below the uppermost filling access roadway 6 towards the stope. The uppermost irregular roof 8 is laid according to the location of the discharge port of the uppermost filling borehole 9. The discharge port is located on the intersection line between the roof boundary and the boundary of the adjacent two-step ore body, 2-3m above the roof boundary. A 2m high step is formed at a slope of 3-4°, 7-10m below the uppermost filling access roadway 6, extending outwards towards the adjacent stope boundary. Adjacent filling boreholes are spaced 20-25m apart. The borehole diameter for both filling and venting boreholes is 150-200mm. Figure 18 As shown.

Claims

1. A method for mining followed by backfilling after ore extraction in an upward continuous segmented drilling stage, characterized in that, The steps include: 1) The ore body is divided into several continuous ore rooms, which are cemented and non-cemented ore rooms arranged at intervals; the vertical direction of the ore block is the stage height, and it is divided into several segments along the stage height. 2) Mining cemented backfilled ore chambers in sections from bottom to top, followed by mining uncemented backfilled ore chambers. At each section height, cemented backfilled ore chambers are mined one section height higher than uncemented backfilled ore chambers. 3) Each segment includes a drilling tunnel (3) and a bottom trench tunnel (1). The drilling area shared by the bottom trench tunnel (1) of the lower segment and the drilling tunnel (3) of the upper segment constitutes a drilling unit. During mining, each drilling unit drills upward fan-shaped medium-deep blast holes from the bottom trench tunnel (1) and the drilling tunnel (3) to drill and blast the subdivided ore body. 4) After the cemented or non-cemented filling ore body is mined out, the filling borehole is drilled downward from the filling access (6) of the next section of the drilling tunnel (3) of the perforation unit to fill the void. 5) After continuous mining and filling from bottom to top to the uppermost section, the uppermost roof is formed by designing and drilling blast holes; 6) Arrange the uppermost section filling access (6) in the uppermost section of the ore body, and construct the uppermost filling borehole (9) and the uppermost filling venting borehole (10) through the uppermost section filling access (6) to the stope.

2. The method for mining followed by backfilling after ore extraction in an upward continuous segmented drilling stage according to claim 1, characterized in that: In step 3), cemented filling stops are mined using indirect mining blasting; for non-cemented filling stops, one side of the cemented filling stop is mined first, and then the other side of the cemented filling stop is mined.

3. The method for mining followed by backfilling after ore extraction in an upward continuous segmented drilling stage according to claim 1, characterized in that: In step 3), the blasted ore is discharged from the ore outlet roadway (2).

4. The method for mining followed by backfilling after ore extraction in an upward continuous segmented drilling stage according to claim 1, characterized in that, In step 4), the void filling process is as follows: from bottom to top, the bottom and top of the void in the stope are filled with high-strength cemented material at every other segment, and the remaining parts are filled with cemented material. The filling process of the non-cemented stope is the same as that of the cemented stope. From bottom to top, the bottom and top of the void in the non-cemented stope are filled with high-strength cemented material at every other segment, and the remaining parts are filled with non-cemented material.

5. A method for mining followed by backfilling after ore extraction in an upward continuous segmented drilling stage according to claim 4, characterized in that: The high-strength cemented backfill is used in the bottom 5-10m and top 5-10m of the medium-thick ore body; and in the bottom 10-15m and top 5-10m of the thick ore body.

6. The method for mining followed by backfilling after ore extraction in an upward continuous segmented drilling stage according to claim 1, characterized in that: In step 5), the uppermost top plate is an irregular top plate (8); the irregular top plate (8) is stepped, with one side boundary of the upper platform (81) located below the material outlet of the uppermost filling borehole (9), and the lower platform (83) slopes downward to the other side.

7. A method for mining followed by backfilling in an upward continuous vertical deep-hole stage of ore extraction according to claim 6, characterized in that: The discharge port of the uppermost filling borehole (9) is located on the intersection line between the boundary of the upper platform of the irregular top plate (8) and the boundary of the adjacent two-step mining body, which is 2-3m above the boundary.

8. A method for mining followed by backfilling in an upward continuous vertical deep-hole stage of ore extraction according to claim 6, characterized in that: The lower surface of the irregular top plate (10) has a slope of 3 to 4 degrees.

9. A method for mining followed by backfilling in an upward continuous vertical deep-hole stage of ore extraction according to claim 6, characterized in that: The irregular roof plate (10) forms a step 3 to 5 m above the rock drilling chamber (4) on one side of the boundary of the adjacent two mining bodies, and the step height is 1.5 to 2 m.

10. A method for mining followed by backfilling in an upward continuous vertical deep-hole stage of ore extraction according to any one of claims 1-9, characterized in that: The uppermost filling borehole (9) and the uppermost filling venting borehole (10) are both designed in rows along the direction of the stope, with the uppermost filling venting borehole row located between the uppermost filling borehole rows; the uppermost filling borehole (9) extends obliquely downward to the boundary between the lower section stope and the previous direction stope of the lower section, and the discharge port is located at the boundary of the previous direction stope of the lower section; the row spacing of the uppermost filling borehole (9) of the medium-thick ore body is half the length of the stope; the row spacing of the uppermost filling borehole (9) of the thick ore body is 20-25m.

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