A method and system for steep thick ore body slicing and caving with fill

Abstract

The application provides a combined mining method and system of inclined slicing caving and filling for steeply inclined thick ore body. The method adopts the method of dividing several mining middle sections by the upper and lower reverse ore layer inclination, dividing several mining sections in the mining middle section by the upper and lower reverse ore layer inclination, and dividing several panels at a certain distance along the ore layer strike. The section panel pseudo-inclined cutting up mountain is excavated by the section communication roadway, the section panel pseudo-inclined cutting up mountain is connected to the section return air roadway, the panel return air communication roadway is excavated in the upper panel surrounding rock of the diamond panel of the mining section, the ore body is mined by the upper and lower one by one inclined slicing in the mining middle section, the main ore room is mined and filled, the cutting up mountain protection pillar on both sides of the ore body in the diamond panel of the mining section is retreated after the main ore room is mined, the mining section panel ore body is mined, and the filling is performed in time after the mining, the ore resources in the caving dead angle can be recovered to the maximum, and the steeply inclined thick ore body is safely, efficiently and economically mined.

Description

Technical Field

[0001] This application relates to the field of mining technology, and in particular to a method and system for combined mining of steeply inclined thick ore bodies by sloping layered caving and filling. Background Technology

[0002] Currently, the main methods for mining steeply dipping thick ore bodies are backfilling and caving. Backfilling can meet safety and environmental protection requirements, but the ore body is mined slowly, limiting the mine's production capacity. Caving can effectively improve mining efficiency, but the roof is prone to collapse. Moreover, when using caving to mine thick ore bodies, the edges of the caving funnel have dead angles, which can easily cause mining safety hazards or resource losses.

[0003] Therefore, there is an urgent need to provide a technical solution that addresses the shortcomings of the existing technology. Summary of the Invention

[0004] The purpose of this application is to provide a method and system for combined mining of steeply dipping thick ore bodies by sloping layered caving and filling, in order to solve or alleviate the problems existing in the prior art.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] This application provides a method for combined caving and backfilling mining of steeply inclined thick ore bodies, comprising: Step S101, dividing the ore body perpendicular to the strike of the ore body into multiple mining sections according to the dip of the ore layer, and further dividing each mining section into multiple mining sub-sections according to the dip of the ore layer; simultaneously, dividing the ore body into multiple panels along the strike of the ore body at a set interval; wherein the projection of each panel on the plane is rhomboid; Step S102, constructing inclined ramps, intermediate transport tunnels, and sub-section transport tunnels on the lower wall of each mining sub-section ore body, and constructing dedicated return air shafts and sub-section return air tunnels on the upper wall of each mining sub-section ore body; wherein the intermediate transport tunnels and sub-section transport tunnels are connected by connecting roads and intermediate chutes; Step S103, dividing the ore body into sub-sections... The transport level roadway is excavated from the segmented connecting roadway at both ends of the segmented panel, cutting upwards from the pseudo-inclined cutting of the segmented panel, entering both sides of the rhomboid panel of this mining segment. In the vein near the hanging wall of the rhomboid panel, the vein segmented return air level roadway is excavated, and the segmented panel return air connecting roadway is excavated from one end of the segmented panel pseudo-inclined cutting upwards to the hanging wall surrounding rock, connecting with the segmented return air level roadway. The entire mining segment is connected to the dedicated return air shaft by the segmented return air connecting roadway. Step S104: The segmented panel ore body is divided into two parts: the cutting upward protective pillar and the main stope. The main stope is mined and backfilled using an alternating mining mode of one mining at a time. After the main stope is mined, the cutting upward protective pillar on both sides of the segmented panel ore body is mined from the hanging wall to the footwall of this mining segment, and backfilled in a timely manner after mining.

[0007] Preferably, multiple mining panels are mined simultaneously, with mining from top to bottom between the mining sections within each panel, and mining of each mining segment from top to bottom within each mining section, and adjacent mining segments are mined using an intermittent mining mode.

[0008] Preferably, the top dip angle of the mining section and mining sub-section is in the range of 40 to 50 degrees, the length of the mining sub-section along the dip angle of the ore body is in the range of 15 to 20 meters, and the length of the mining section along the dip angle of the ore body is in the range of 60 to 100 meters.

[0009] Preferably, the segmented plate area pseudo-inclined cutting uphill is inclined in both the vertical and horizontal directions.

[0010] Preferably, the segmented panel pseudo-inclined cutting of the upper and lower footwalls at one end of the connecting channel of the panel covers the ore body of this segmented panel.

[0011] Preferably, in step S104, the main stope includes: the main stope divides the segmented panel into multiple long strips at preset intervals perpendicular to the dip of the ore body, forming a diamond-shaped access roadway; the diamond-shaped access roadway is horizontally excavated from one end of the segmented panel's pseudo-inclined cutting uphill section to the other end, connecting to the panel's return air connecting roadway; in the diamond-shaped access roadway, retreat mining is carried out from one end of the segmented panel's pseudo-inclined cutting uphill section connecting to the panel's return air connecting roadway to the other end of the segmented panel's pseudo-inclined cutting uphill section; wherein, the diamond-shaped access roadway mining adopts an adjacent access roadway interval mining mode; in response to the diamond-shaped access roadway mining, when the mining of an adjacent access roadway begins, the adjacent diamond-shaped access roadway that has been mined is backfilled.

[0012] Preferably, during the diamond-shaped approach mining, upward fan-shaped blast holes are excavated from the diamond-shaped approach mining tunnel towards both sides and the top for caving mining.

[0013] This application embodiment also provides a combined mining system for steeply inclined thick ore bodies with sloping layered caving and backfilling, including: a segmentation unit configured perpendicular to the ore body strike, dividing the ore body into multiple mining sections according to the dip of the ore layer, and further dividing each mining section into multiple mining sub-sections according to the dip of the ore layer; simultaneously, dividing the ore body into multiple panels along the ore body strike at a set interval; wherein the projection of each panel on the plane is rhomboid; a first auxiliary unit configured to install ramps, intermediate transport tunnels, and sub-section transport tunnels on the lower wall of each mining sub-section ore body, and to install dedicated return air shafts and sub-section return air tunnels on the upper wall of each mining sub-section ore body; wherein the intermediate transport tunnels and sub-section transport tunnels are connected by connecting roads and intermediate chutes; a second auxiliary unit configured to access the ore bodies of each mining sub-section ore body. The segmented transport roadway is excavated from the segmented connecting roadways at both ends of the segmented panel, cutting upwards at a pseudo-inclined angle, entering both sides of the rhomboid panel of this mining segment. Within the vein of the rhomboid panel near the hanging wall, a segmented return airway is excavated. A connecting roadway is then excavated from one end of the segmented panel, cutting upwards at a pseudo-inclined angle, into the surrounding rock within the hanging wall vein, connecting to the segmented return airway. The entire mining segment is connected to a dedicated return air shaft via the segmented return airway connecting roadway. The backfilling unit is configured to divide the segmented panel ore body into two parts: a cutting-up protective pillar and a main stope. The main stope is backfilled and backfilled using an alternating mining pattern. After the main stope is backfilled, the cutting-up protective pillars on both sides of the segmented panel are mined from the hanging wall to the footwall, and backfilled promptly after mining.

[0014] Compared with the closest prior art, the combined mining method for steeply dipping thick ore bodies with inclined layered caving and backfilling provided in this application has at least the following technical effects:

[0015] Vertically to the ore body strike, the ore body is divided into multiple mining sections according to the dip direction of the ore layer. Each mining section is further divided into multiple mining sub-sections according to the dip direction of the ore layer. Simultaneously, along the ore body strike, the ore body is divided into multiple panels that project as rhombuses on the plane at predetermined intervals. Inclined ramps, intermediate transport horizontal tunnels, and sub-section transport horizontal tunnels are constructed in the hanging wall of each mining sub-section. Dedicated return air shafts and sub-section return air horizontal tunnels are constructed in the hanging wall of each mining sub-section. The intermediate transport horizontal tunnels and sub-section transport horizontal tunnels are connected by connecting tunnels and intermediate chutes. The sub-section panels are excavated from the sub-section transport horizontal tunnels of each mining sub-section via the sub-section connecting tunnels at both ends of the sub-section panels, cutting through a pseudo-dipping pattern. The mining section proceeds uphill, entering both sides of the rhomboid panel of the ore body. Within the vein near the hanging wall of the rhomboid panel, segmented return air tunnels are excavated. A pseudo-inclined section of the panel at one end cuts through the surrounding rock of the hanging wall to create a panel return air connection tunnel, which connects to the segmented return air tunnel. The entire mining section is connected to a dedicated return air shaft via the segmented return air connection tunnel. The ore body of the segmented panel is divided into two parts: the cutting uphill protective pillars and the main stope. The main stope is mined and backfilled using an alternating mining pattern. After the main stope is mined, the cutting uphill protective pillars on both sides of the ore body of this mining section are mined from the hanging wall to the footwall, and backfilled promptly after mining.

[0016] On the one hand, compared with the caving method for mining steeply inclined thick ore bodies, the intermittent mining mode with separate access routes allows for timely backfilling after caving, resulting in a small exposed width and effectively ensuring ore recovery and backfilling. Furthermore, the backfilling of each access route does not affect each other, and multiple sections and multiple access routes can be caved simultaneously, resulting in more mining faces and greater production capacity. The design of the inclined access route also avoids the existence of dead zones in caving mining, enabling the comprehensive recovery of ore resources.

[0017] On the other hand, a complete and smooth ventilation circuit was formed during the cutting construction, effectively ensuring the safety and health of the workers. The direction of the pseudo-inclined cutting uphill is to ensure that the pseudo-inclined cutting uphill section of the panel at one end of the connecting panel return air passage covers the ore body of this panel in the footing. In the diamond-shaped approach return roadway, the mining is carried out from the pseudo-inclined cutting uphill section of the panel at one end of the connecting panel return air passage to the pseudo-inclined cutting uphill section of the panel at the other end. This allows the mining activities of the upper plate mining approach to be carried out under the protection of the unmined ore body of the lower plate mining approach, ensuring safer mining operations. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. Wherein:

[0019] Figure 1This is a schematic flowchart of a method for combined caving and backfilling mining of a steeply inclined thick ore body according to some embodiments of this application;

[0020] Figure 2 This is a front view of the mining operation carried out using the inclined layered caving and backfilling combined mining method for steeply dipping thick ore bodies provided in the embodiments of this application.

[0021] Figure 3 for Figure 2 AA view in the illustrated embodiment;

[0022] Figure 4 for Figure 2 BB view in the illustrated embodiment;

[0023] Figure 5 This is a front view of a single segmented panel provided according to an embodiment of this application;

[0024] Figure 6 for Figure 5 The top view of the view shown;

[0025] Figure 7 This is a structural schematic diagram of a combined stratified caving and backfilling mining system for a steeply inclined thick ore body, according to some embodiments of this application.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Inclined ramp; 2. Intermediate transport level roadway; 3. Segmented transport level roadway; 4. Intermediate ore pass; 5. Segmented connecting roadway; 6. Segmented panel pseudo-inclined cutting uphill; 7. Diamond-shaped access roadway for mining; 8. Panel vein return airway; 9. Cutting uphill protective pillar; 10. Panel return air connecting roadway; 11. Segmented return airway; 12. Segmented return air connecting roadway; 13. Dedicated return air shaft; 14. Upward fan-shaped blast hole. Detailed Implementation

[0028] The present application will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation and not by way of limitation. In fact, those skilled in the art will recognize that modifications and variations can be made to the present application without departing from the scope or spirit thereof. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present application encompass such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0029] When mining steeply dipping thick ore bodies, both traditional backfilling and caving methods have drawbacks and cannot effectively balance the contradiction between mining efficiency and safety. Based on this, the applicant proposes a combined caving-backfilling mining method for steeply dipping thick ore bodies. This method involves dividing the ore body into several mining sections from top to bottom against the dip of the ore layer, and further dividing each mining section into several mining sub-sections against the dip of the ore layer. At the same time, the ore body is divided into several panels at certain intervals along the strike of the ore layer. During the mining of the ore body, the mining is carried out in two steps: from top to bottom between mining sections and from top to bottom within each mining section, with one mining step followed by one caving step. This method organically combines the high efficiency of caving mining with the good safety of backfilling mining, and can maximize the recovery of ore resources in the caving dead zones.

[0030] First, it should be noted that when mining gently dipping, dipping, and steeply dipping deposits, one or more main transport roadways aligned with the strike are excavated at certain vertical intervals within the mining area, dividing the mining area vertically into mining sections. These mining sections are called stages (i.e., mining sections in this application).

[0031] When mining horizontal or slightly inclined deposits, if the deposit thickness does not exceed the allowable stage height, no further stages are defined within the mining area. In this case, for ease of mining operations, the mining area is divided into rectangular sections using panel transport roadways; these sections are called panels. Within a mining section, further horizontal or near-horizontal cutting creates localized ore bodies or blocks with independent ventilation, drainage, and transport functions; these are defined as segmented panels. When the cutting slope is too steep, to meet the slope requirements for personnel and equipment operation, a layout method is adopted that forms a certain angle with the slope dip to reduce the operating slope for personnel and equipment; this is defined as pseudo-inclined cutting uphill.

[0032] To prevent the passage for personnel and equipment to operate on the cutting hill from being prematurely mined during the mining process, the long strip-shaped ore body around the cutting hill that ensures its existence is defined as the cutting hill protection pillar. Within the segmented panel, the majority of the ore body that can be mined on a large scale, excluding the cutting hill protection pillar, is defined as the main stope.

[0033] Protective pillars for cutting uphill: These are long, narrow ore bodies around the cutting uphill that are left to ensure the survival of the cutting uphill and prevent the passage for personnel and equipment from being prematurely mined during the mining process.

[0034] like Figures 1 to 6 As shown, the combined mining method for steeply dipping thick ore bodies with inclined layered caving and backfilling includes:

[0035] Step S101: Vertically to the strike of the ore body, the ore body is divided into multiple mining sections according to the dip of the reverse ore layer. Each mining section is further divided into multiple mining sub-sections according to the dip of the reverse ore layer. At the same time, the ore body is divided into multiple panels along the strike of the ore body according to a set spacing.

[0036] In other words, the ore body is divided into several mining sections from top to bottom, against the dip of the ore layer. Each mining section is further divided into 4 to 6 mining sub-sections, with each sub-section extending 15 to 20 meters along the dip angle of the ore body, and each mining sub-section extending 60 to 100 meters along the dip angle of the ore body. Simultaneously, a panel is formed every 200 to 300 meters along the strike of the ore body, and these panels are rhomboid in shape. During ore body mining, the mining between panels does not interfere with each other, and multiple panels can be mined simultaneously. Within each panel, mining proceeds from top to bottom between mining sections, and within each mining section, mining sub-sections are recovered from top to bottom. Adjacent mining sub-sections are mined in an alternating pattern, with one sub-section mined and one recovered at a time.

[0037] Step S102: Install inclined ramp 1, intermediate transport level 2 and segment transport level 3 on the lower plate of each mining section ore body, and install dedicated return air shaft 13 and segment return air level 11 on the upper plate of each mining section ore body.

[0038] Among them, the intermediate transport level 2 and the sub-section transport level 3 are connected to the intermediate ore pass 4 through a connecting passage; the top dip angle of the mining intermediate section and the mining sub-section is in the range of 40 degrees to 50 degrees, thereby effectively ensuring that the caving method can be successfully caved and the ore can be loaded and transported in a concentrated manner during the mining of the access road.

[0039] Step S103: From the segmented transport roadway 3 of each mining segment, the segmented connecting roadway 5 at both ends of the segmented panel is used to excavate the pseudo-inclined cutting incline 6 of the segmented panel, entering both sides of the rhomboid panel of this mining segment. In the vein near the hanging wall of the rhomboid panel, the vein segmented return air roadway 11 is excavated, and from one end of the pseudo-inclined cutting incline 6, the panel return air connecting roadway 10 is excavated to the hanging wall surrounding rock, connecting to the segmented return air roadway 11. The entire mining segment is connected to the dedicated return air shaft 13 by the segmented return air connecting roadway 12. This forms a complete initial ventilation system for the panel. Here, the pseudo-inclined cutting incline 6 of the segmented panel is inclined in both the vertical and horizontal directions, effectively ensuring the slope requirements for equipment and personnel transportation.

[0040] Step S104: Divide the segmented panel ore body into two parts: the cutting uphill protection pillar 9 and the main stope. Use an alternating mining mode of mining one at a time to mine the main stope and backfill it. After the main stope is mined, the cutting uphill protection pillar 9 on both sides of the ore body of this segmented panel is mined from the hanging wall to the footwall. Backfill it in time after mining.

[0041] Specifically, when the main stope is backfilled using an alternating mining mode of one mining at a time, the main stope is divided into multiple long strips at preset intervals in the opposite direction to the dip of the ore body, forming a diamond-shaped approach. That is, the main stope is divided into several long strips at intervals of 20 meters in the opposite direction to the dip of the ore body, forming a diamond-shaped approach. The diamond-shaped approach backfilling roadway 7 is horizontally excavated from the pseudo-inclined cutting uphill 6 at one end of the diamond-shaped approach to the return air connecting roadway 10 at the other end of the approach.

[0042] Subsequently, in the diamond-shaped access roadway 7, the section of the panel pseudo-inclined cutting uphill 6, connecting one end of the panel return air connecting roadway 10, is withdrawn from the other end of the section of the panel pseudo-inclined cutting uphill 6. The access road withdrawal also adopts an alternating mining mode between adjacent access roads, allowing multiple access roads to be withdrawn simultaneously to meet the mine's production capacity requirements. During withdrawal, upward fan-shaped blast holes 14 are successively excavated from the diamond-shaped access roadway 7 towards both sides and the top for caving mining. The blast hole depth is 8 to 12 meters, the row spacing is 1 meter, and 5 to 8 rows of ore body are caved in a single blast.

[0043] In response to the diamond-shaped approach mining, when mining an adjacent approach begins, the adjacent diamond-shaped approach that has already been mined is backfilled. That is to say, when adjacent diamond-shaped approaches are mined in an alternating mining mode, one approach is mined at a time until mining of the adjacent approach begins, the adjacent diamond-shaped approach that has already been mined is backfilled in a timely manner.

[0044] In this application, the orientation of the pseudo-inclined cut-up incline must ensure that the footwall of the pseudo-inclined cut-up incline 6 at one end of the connecting panel return airway 10 covers the ore body of this segmented panel. That is, viewed from top to bottom, the footwall of the pseudo-inclined cut-up incline 6 at one end of the connecting panel return airway 10 is the main ore body of this segmented panel. During diamond-shaped approach mining, retreat mining must be carried out from one side of the pseudo-inclined cut-up incline 6 at one end of the connecting panel return airway 10 to the other side of the pseudo-inclined cut-up incline 6 at the other end.

[0045] After the main stope is mined, the cutting and protective pillars 9 on both sides of the ore body in this section are mined from the hanging wall to the footwall. After mining, they are backfilled in time.

[0046] For steeply dipping thick ore bodies, traditional mining methods such as caving offer high production capacity but are not safe enough and suffer from incomplete resource recovery. Backfilling methods, on the other hand, limit mine production capacity. This application proposes a combined caving-backfilling mining method with inclined layers. The method involves dividing the ore body into several mining sections dipping downwards against the ore's dip, and further dividing each mining section into sub-sections dipping downwards against the ore's dip. Simultaneously, the working roadway along the ore body is divided into several panels at regular intervals. During ore body mining, the mining is carried out in two steps: dipping between mining sections from top to bottom, and dipping within each mining section from top to bottom, alternating dipping and layering. Combining caving and backfilling methods, with each section (i.e., the access road) dipping every other section, and then backfilling immediately after each access road, allows for simultaneous caving or backfilling of multiple working faces, increasing production capacity. Timely backfilling also ensures mining safety. Furthermore, the design of inclined mining sections, inclined sub-sections, and access roads reduces the amount of unrecoverable ore in the caving funnel dead zone, maximizing ore resource recovery. It effectively solves the shortcomings of traditional mining methods in mining steeply inclined thick ore bodies, which cannot simultaneously mine the ore body efficiently and safely. Through the design of inclined stratification and pseudo-inclined cutting uphill, it realizes simultaneous caving and backfilling of multiple access routes, and achieves safe, efficient and economical mining of steeply inclined thick ore bodies.

[0047] like Figure 5 As shown, this application also provides a combined mining system for steeply inclined thick ore bodies with sloping caving and backfilling, including: a segmentation unit 701, a first auxiliary unit 702, a second auxiliary unit 703, and a backfilling unit 704.

[0048] Among them, the segmentation unit 701 is configured to be perpendicular to the ore body strike, dividing the ore body into multiple mining sections according to the dip of the reverse ore layer, and each mining section is further divided into multiple mining segments according to the dip of the reverse ore layer; at the same time, the ore body is divided into multiple panels along the ore body strike according to a set spacing, and the projection of each panel on the plane is a rhombus.

[0049] The first auxiliary unit 702 is configured to install a ramp 1, a mid-level transport level 2 and a segment transport level 3 on the lower plate of each mining section ore body, and a dedicated return air shaft 13 and a segment return air level 11 on the upper plate of each mining section ore body. The mid-level transport level 2 and the segment transport level 3 are connected by a connecting road and a mid-level chute 4.

[0050] The second auxiliary unit 703 is configured to excavate from the segment transport roadway 3 of each mining segment through the segment connecting roadway 5 at both ends of the segment panel into the pseudo-inclined cutting incline 6 of the segment panel, enter the rhomboid panel of this mining segment, and excavate the segment return air roadway 11 in the vein near the hanging wall of the rhomboid panel. The segment return air roadway 10 is excavated from one end of the segment panel pseudo-inclined cutting incline 6 into the surrounding rock of the hanging wall vein and connects with the segment return air roadway 11. The entire mining segment is connected to the dedicated return air shaft 13 by the segment return air roadway 12.

[0051] The backfilling unit 704 is configured to divide the segmented panel ore body into two parts: the cutting uphill protection pillar 9 and the main stope. The main stope is backfilled and backfilled using an alternating mining mode of one mining at a time. After the main stope is backfilled, the cutting uphill protection pillar 9 on both sides of the ore body of this segmented panel is backfilled from the hanging wall to the footwall. Backfilling is carried out in a timely manner after mining.

[0052] The combined mining system for mining steeply inclined thick ore bodies with sloping caving and backfilling provided in this application embodiment can realize the steps and processes of any of the above-mentioned combined mining methods for mining steeply inclined thick ore bodies with sloping caving and backfilling, and achieve the same technical effect, which will not be repeated here.

[0053] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for combined mining of steeply dipping thick ore bodies with inclined layered caving and backfilling, characterized in that, include: Step S101: Vertically to the strike of the ore body, the ore body is divided into multiple mining sections according to the dip of the reverse ore layer. Each mining section is further divided into multiple mining sub-sections according to the dip of the reverse ore layer. At the same time, the ore body is divided into multiple panels along the strike of the ore body at a set interval. The projection of each panel on the plane is a rhombus. Step S102: Install ramps, intermediate transport level tunnels and segmented transport level tunnels on the lower plate of each mining section ore body, and install dedicated return air shafts and segmented return air level tunnels on the upper plate of each mining section ore body; wherein, the intermediate transport level tunnel and segmented transport level tunnel are connected by connecting tunnels and intermediate chute. Step S103: From the segment transport roadway of each mining segment, the segment connecting roadway at both ends of the segment panel is excavated to the pseudo-inclined cutting uphill of the segment panel, entering both sides of the rhomboid panel of this mining segment. In the vein of the rhomboid panel near the hanging wall, the segment return air roadway is excavated, and from one end of the segment panel, the pseudo-inclined cutting uphill is excavated to the hanging wall surrounding rock to the panel return air connecting roadway and the segment return air roadway. The entire mining segment is connected to the dedicated return air shaft by the segment return air connecting roadway. Step S104: Divide the segmented panel ore body into two parts: the cutting uphill protection pillar and the main stope. Use an alternating mining mode of mining one at a time to mine the main stope and backfill it. After the main stope is mined, the cutting uphill protection pillar on both sides of the ore body of this segmented panel is mined from the hanging wall to the footwall. Backfilling is done in time after mining. The main stope for mining includes: The main stope is perpendicular to the dip of the ore body and diverts the segmented panel into multiple long strips according to the preset spacing, forming a diamond-shaped approach. The diamond-shaped approach is horizontally excavated from one end of the segmented panel through the pseudo-inclination cutting uphill to the other end, connecting the panel return air connecting roadway. In the diamond-shaped access roadway, the section panel pseudo-inclined cutting uphill side at one end of the connecting panel return air access road is withdrawn to the section panel pseudo-inclined cutting uphill side at the other end; among them, the diamond-shaped access roadway back mining adopts the adjacent access roadway interval mining mode; When mining the diamond-shaped approach, and starting to mine the adjacent approach, the adjacent diamond-shaped approach that has been mined is backfilled; when mining the diamond-shaped approach, the upward fan-shaped blast holes are excavated row by row from the diamond-shaped approach mining roadway to the two sides and the top for caving mining, and the depth of the blast holes is 8 to 12 meters, the row spacing is 1 meter, and 5 to 8 rows of ore body are caved in one blast.

2. The method for combined mining of steeply dipping thick ore bodies with inclined layered caving and backfilling according to claim 1, characterized in that, Multiple mining blocks are mined simultaneously. Within each block, mining is carried out from top to bottom between different mining sections. Within each mining section, mining segments are back-mined from top to bottom, and adjacent mining segments are back-mined using an intermittent mining mode.

3. The method for combined mining of steeply dipping thick ore bodies with inclined layered caving and backfilling according to claim 1, characterized in that, The top dip angle of the mining section and mining sub-section is in the range of 40 to 50 degrees. The length of the mining sub-section along the dip angle of the ore body is in the range of 15 to 20 meters. The length of the mining section along the dip angle of the ore body is in the range of 60 to 100 meters.

4. The method for combined mining of steeply dipping thick ore bodies with inclined layered caving and backfilling according to claim 1, characterized in that, The segmented panel area pseudo-inclined cutting uphill is inclined in both the vertical and horizontal directions.

5. The method for combined mining of steeply dipping thick ore bodies with inclined layered caving and backfilling according to claim 4, characterized in that, The segmented panel, with its pseudo-inclined cutting along the upper and lower footwalls, encompasses the ore body of this segmented panel.

6. A combined mining system for steeply dipping thick ore bodies with inclined layered caving and backfilling, characterized in that, include: The segmentation unit is configured to be perpendicular to the ore body strike and to divide the ore body into multiple mining sections according to the dip of the reverse ore layer. Each mining section is further divided into multiple mining sub-sections according to the dip of the reverse ore layer. At the same time, the ore body is divided into multiple panels along the strike of the ore body at a set interval. The projection of each panel on the plane is a rhombus. The first auxiliary unit is configured to have ramps, intermediate transport level tunnels and segmented transport level tunnels laid in the lower plate of each mining section ore body, and dedicated return air shafts and segmented return air level tunnels laid in the upper plate of each mining section ore body; wherein, the intermediate transport level tunnel and segmented transport level tunnels are connected by connecting tunnels and intermediate chute. The second auxiliary unit is configured to excavate from the segmented transport roadway of each mining segment through the segmented connecting roadway at both ends of the segmented panel, cutting uphill from the pseudo-inclination of the segmented panel, entering both sides of the rhomboid panel of this mining segment, excavating the segmented return air roadway within the vein near the hanging wall of the rhomboid panel, and excavating the panel return air connecting roadway from the pseudo-inclination of the segmented panel at one end to the surrounding rock within the hanging wall vein, connecting with the segmented return air roadway. The entire mining segment is connected to the dedicated return air shaft by the segmented return air connecting roadway. The backfilling unit is configured to divide the segmented ore body into two parts: a cutting incline protection pillar and a main stope. The main stope is backfilled and backfilled using an alternating mining pattern. After the main stope is backfilled, the cutting incline protection pillars on both sides of the ore body in this segment are mined from the hanging wall to the footwall, and backfilled promptly after mining. The main stope backfilling unit includes: The main stope is perpendicular to the dip of the ore body and diverts the segmented panel into multiple long strips according to the preset spacing, forming a diamond-shaped approach. The diamond-shaped approach is horizontally excavated from one end of the segmented panel through the pseudo-inclination cutting uphill to the other end, connecting the panel return air connecting roadway. In the diamond-shaped access roadway, the section panel pseudo-inclined cutting uphill side at one end of the connecting panel return air access road is withdrawn to the section panel pseudo-inclined cutting uphill side at the other end; among them, the diamond-shaped access roadway back mining adopts the adjacent access roadway interval mining mode; When mining the diamond-shaped approach, and starting to mine the adjacent approach, the adjacent diamond-shaped approach that has been mined is backfilled; when mining the diamond-shaped approach, the upward fan-shaped blast holes are excavated row by row from the diamond-shaped approach mining roadway to the two sides and the top for caving mining, and the depth of the blast holes is 8 to 12 meters, the row spacing is 1 meter, and 5 to 8 rows of ore body are caved in one blast.

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