A gently inclined medium-thick ore deposit full-section long-pass filling mining method

Abstract

The application discloses a kind of gently inclined medium-thick deposit full section long drift filling mining method, it is related to mining technical field.The application includes the following steps: (1) panel division;(2) preparation engineering;(3) panel transport system installation;(4) long drift mechanized stoping;(5) long drift filling;(6) continuous production operation.Long drift stope is arranged along the ore body trend, and the upper and lower sections do not affect each other, realize multiple sections in panel simultaneous operation, improve production efficiency;Use shallow hole drilling machine blasting or tunneling machine cutting drop ore, drift filling mining, ore room once stoping is completed, stoping rate is high;Utilize panel belt conveyor roadway and belt conveyor system, solve the problem of ore mining, transport and carry;In the process of stoping, work is realized mechanized operation, operation intensity is low, and operation safety is high;Adopt all tailings and cement as filling material, utilize the flexible characteristics of long drift stope goaf filling method, improve the efficiency of mining and filling cycle, guarantee production capacity and mine safety.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mining, in particular to a full middle section long drift filling mining method for gently inclined medium-thick ore deposit. BACKGROUND

[0002] The gently inclined medium-thick ore body (inclination 5°-30°, thickness 5m-15m) accounts for a large proportion in the metal and non-metal underground mines in China. The gently inclined medium-thick ore body in China is mainly mined by the room-and-pillar method, the sublevel open stope method with the lower foot structure, the sublevel caving method and the filling method. There are technical problems in the mining process, such as the ore cannot be transported by gravity, the roof management is difficult, the mining and cutting cost is high, and the production efficiency is low. In the mining process of the gently inclined medium-thick ore body, new ideas, new technologies and new equipment are introduced, the application of mechanized mining technology is promoted, and the production efficiency is improved, the production cost is reduced, and the production safety is ensured. A mining method for gently inclined medium-thick phosphate ore deposit is disclosed in CN115653601A, wherein the ore room drift is vertically arranged, the upper sublevel drift is overlaid on the top of the lower sublevel, and multiple stopes can be operated simultaneously in one panel. However, the method cannot realize the simultaneous operation of multiple sublevels in the panel, and the mining efficiency is low. In addition, drilling and blasting are required in the mining process, and the transportation path is long after the ore is dropped, which makes the recovery process complex. SUMMARY

[0003] The present application aims to provide a full middle section long drift filling mining method for gently inclined medium-thick ore deposit, which solves the problems of complex process and low efficiency of the existing mining method.

[0004] To solve the above technical problems, the present application adopts the following technical scheme: a full middle section long drift filling mining method for gently inclined medium-thick ore deposit, comprising the following steps:

[0005] S1. Panel division: divide the whole ore along the ore body strike into several panels, divide the panel into multiple middle sections, and then divide the middle section into several sublevels. The sublevel is mined by upward sequential mining, multiple sublevels in a single panel are operated simultaneously, and each sublevel is arranged along the ore body strike to form a long drift stope;

[0006] S2. Preparation engineering: arrange a panel belt conveyor roadway in the middle position of the panel along the pseudo-inclined direction of the ore body, and the belt conveyor roadway is arranged in the ore body or the surrounding rock of the upper and lower panels; arrange a preparation inclined ramp on both sides of the belt conveyor roadway in the horizontal direction of the panel along the pseudo-inclined direction of the ore body; arrange a cutting roadway between the preparation inclined ramp and the long drift stope; arrange a sublevel connecting tunnel along the ore body strike, which is used to connect the belt conveyor roadway, the preparation inclined ramp, the cutting roadway and the long drift stope; the cutting roadway is arranged in the ore body along the pseudo-inclined direction of the ore body; the sublevel connecting tunnel connects the cutting roadways of adjacent panels; and no chute is arranged;

[0007] S3. Disc area transportation system installation: installing belt conveyor in disc area belt conveyor roadway; setting up ore feeding device at intersection of disc area belt conveyor roadway and sublevel connection road for feeding ore to belt conveyor;

[0008] S4. Long advance mechanized mining: long advance stope 7 uses rock drilling jumbo blasting and falling ore, shovel-truck ore removal, or uses heading machine cutting and falling ore, mine shuttle car or small mine truck for ore transportation; ore in long advance stope sequentially passes through cutting roadway, sublevel connection road and disc area belt conveyor roadway into mine hoisting transportation system;

[0009] S5. Long advance filling: constructing filling shaft at the end of long advance stope; filling shaft is connected with cutting roadway of adjacent disc area; erecting filling pipeline from mining and preparation ramp or cutting roadway to long advance goaf; sequentially building retaining wall to fill long advance goaf by section; or after building retaining wall to close long advance stope at both ends, filling in whole.

[0010] S6. Continuous production operation: after completing long advance stope mining operation, filling goaf; after curing of filling body in goaf is completed, sequentially mining separated and adjacent long advance stope until all long advance stopes in the sublevel are mined out and filled.

[0011] The further technical solution is that the long advance stope arrangement step is: in each sublevel, the ore body is divided into three to four layers along the plumb direction, the layer width is 4-5 m, the layer height is 4-5 m, the long advance stope is arranged in each layer, each long advance stope is arranged horizontally along the ore body strike, the long advance stopes in each layer are arranged in steps along the ore body inclination, and the long advance stope length is the disc area length. The long advance stope section is rectangular and is supported by anchor net.

[0012] The further technical solution is that the sublevel height is 10-30 m and the disc area size is 400 m±100 m in the step S1.

[0013] The further technical solution is that the disc area belt conveyor roadway is located in the middle of the disc area, the section is 1 / 3 three-center arch, the width is 3-4 m, the height is 3-4 m, and C20 sprayed concrete support is used.

[0014] The further technical solution is that the mining and preparation ramp section is 1 / 3 three-center arch, the width is 4-5 m, the height is 4-5 m, and C20 sprayed concrete support is used.

[0015] The further technical solution is that the sublevel connection road section is 1 / 3 three-center arch, the width is 4-5 m, the height is 4-5 m, and C20 sprayed concrete support is used.

[0016] The further technical solution is that the cutting roadway section is 1 / 3 three-center arch, the width is 4-5 m, the height is 4-5 m, and anchor net support is used.

[0017] Further technical solutions are that a security ore (rock) pillar with a width of more than 6 meters is reserved between the disc area belt conveying lane and the mining and preparation slope, and a security ore (rock) pillar with a width of more than 6 meters is reserved between the mining and preparation slope and the cutting lane.

[0018] Further technical solutions are that the ore lifting device is one of a transfer machine, a crawler-type transfer crusher and a chute.

[0019] Further technical solutions are that the retaining wall for filling is a reinforced concrete retaining wall.

[0020] Further technical solutions are that the filling material is full tailings mixed with cement slurry, which is prepared and transported by a mine filling system and has a compressive strength of 2 to 6 MPa after solidification.

[0021] Further technical solutions are that the stoping operation is completed in four steps, the first step is to stop the long drift, use the drill jumbo to blast and fall the ore, use the shovel truck to take out the ore, or use the roadheader to cut and fall the ore, use the mine shuttle car or small mine truck to transport the ore; the second step is to stop the long drift, one to two long drifts are reserved between the two long drifts; the third step is to continue to stop the adjacent long drift after the long drift is completed and filled; the fourth step is to stop the first long drift in the section after the first long drift in the section is completely stopped and filled, the section connecting lane and the cutting lane are lifted by 4 to 5 meters, and the next long drift in the section is stopped; after the long drift is stopped by the roadheader or the drill jumbo, the shovel truck, the shuttle car or the small mine truck is used to take out the ore in the stope; the ore passes through the cutting lane, the section connecting lane, the ore lifting device and the disc area belt conveying lane in turn, and finally reaches the mine hoisting and transportation system and is hoisted to the ground surface; the stope ventilation is that fresh air flows into the mining and preparation slope and the disc area belt conveying lane, reaches the long drift working face through the section connecting lane, and is discharged to the ground surface through the section lane and the cutting lane.

[0022] Compared with the prior art, the present application has the beneficial effects that: a full middle section long drift filling mining method for gently inclined medium-thick ore deposit is provided, the long drift stope is arranged along the ore body, the upper and lower sections do not affect each other, multiple sections in the panel can be operated simultaneously to improve the production efficiency; the length of the long drift is relatively long, which can reach the length of the panel, and is not limited by the ore body inclination and thickness, and is convenient for one-time mining and cutting; the ore is cut and dropped by using a shallow hole drilling machine or a tunneling machine, the long drift filling mining is used, the ore room is mined once, the ore room is not expanded by arranging a rock drilling piercing pulse, and the recovery rate is high; the panel belt conveyor roadway and the belt conveyor system are used to solve the problems of ore mining and transportation; the stopes in the single panel are simultaneously operated, the multiple long drifts in the section are synchronously mined with a safe distance, the recovery process is simple, the production capacity is large, the filling efficiency is high, and the operation efficiency is high; in the recovery process, the cutting, blasting, shovel loading, ore hoisting and transportation are all mechanized operations, the production efficiency is high, the operation intensity is low, and the operation safety is high; the whole tailings and cement are used as filling materials, the long drift stope is used to fill the goaf, the goaf is treated in time, the recovery efficiency of the mining and filling cycle is improved, and the production capacity and the mine safety are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 is a schematic view of one angle of the present application.

[0024] Fig. 2 is a schematic view of another angle of the present application.

[0025] Fig. 3 is a schematic view of the side of the present application.

[0026] In the figure, 1 is a panel belt conveyor roadway, 2 is a mining preparation slope, 3 is a cutting roadway, 4 is a section communication passage, 5 is a section roadway, 6 is an ore body, and 7 is a long drift stope. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application, and are not used to limit the present application.

[0028] As shown in Figs. 1-3 , the present application first divides the ore body into a plurality of mining long drifts according to the panel, the middle section, the section and the layer: the whole mine is divided into a plurality of panels along the ore body, is divided into a plurality of middle sections according to the ore body depth, and is divided into a plurality of sections, and the sections are sequentially mined in an upward manner; the stopes in the panel are simultaneously operated, the production efficiency is improved; in each section, the ore body is divided into three to four layers along the plumb direction, and the mining long drift is arranged in each layer. Each mining long drift is horizontally arranged along the ore body.

[0029] The present application carries out the preparation cutting step: constructing the disc area belt conveyor roadway along the false inclined direction of the ore body, constructing the preparation slope, cutting roadway according to the ore body inclination, then constructing the sublevel connection way and sublevel roadway, and completing the installation of the belt conveyor and the ore feeding device.

[0030] In the present application, the sublevel height in the above ore body division and mining sequence step is preferably 10-30m, the disc area size is preferably 400m±100m, and multiple stopes in a single disc area are simultaneously operated; each sublevel is divided into long advance stope along the ore body strike, and the width along the ore body strike is preferably 3-5m; after the long advance stope is completed, the stope is filled. After the filling body in the stope is cured, the adjacent long advance stope is mined in turn until the long advance stope in the sublevel is completely mined and filled.

[0031] In the present application, the disc area belt conveyor roadway in the preparation cutting step is fixedly arranged in the middle of the disc area, the roadway slope is consistent with the angle of the false inclined direction of the ore body, the section is 1 / 3 three-center arch, the width is 3-4m, the height is 3-4m, and C20 sprayed concrete support is used; the preparation slope can adjust the position, the section is 1 / 3 three-center arch, the width is 4-5m, the height is 4-5m, and C20 sprayed concrete support is used; the cutting roadway has a section of 1 / 3 three-center arch, a width of 4-5m, and a height of 4-5m, and anchor net support is used.

[0032] In the present application, the sublevel connection way in the preparation cutting step has a section of 1 / 3 three-center arch, a width of 4-5m, and a height of 4-5m, and C20 sprayed concrete support is used; the sublevel roadway has a section of 1 / 3 three-center arch, a width of 4-5m, and a height of 4-5m, and C20 sprayed concrete support is used.

[0033] The present application carries out the preparation cutting step: constructing the disc area belt conveyor roadway along the false inclined direction of the ore body, constructing the preparation slope, cutting roadway according to the ore body inclination, then constructing the sublevel connection way and sublevel roadway, and completing the installation of the belt conveyor and the ore feeding device. In the present application, the sublevel height in the above ore body division and mining sequence step is preferably 10-30m, the disc area size is preferably 400m±100m, and multiple stopes in a single disc area are simultaneously operated; each sublevel is divided into long advance stope along the ore body strike, and the width along the ore body strike is preferably 3-5m; after the long advance stope is completed, the stope is filled. After the filling body in the stope is cured, the adjacent long advance stope is mined in turn until the long advance stope in the sublevel is completely mined and filled.

[0034] In the present application, the long advance section is rectangular with a width of 4-5m and a height of 4-5m, and is supported by anchor net; the long advance section has a width of 4-5m and a height of 4-5m along the ore body; the length of the long advance section is about 1 / 2 of the length of the panel; a filling connecting lane or filling well is constructed at the end of the long advance section to communicate with the adjacent cutting lane.

[0035] In the present application, the long advance section can be blasted by a drilling jumbo and the ore can be discharged by a shovel truck. Alternatively, the long advance section can be cut by a heading machine and the ore can be transported by a shuttle truck or a small mine truck.

[0036] In the present application, the filling retaining wall is constructed after the stoppage of the mining operation. The retaining wall is constructed at the junction of the long advance section and the cutting lane. The retaining wall is provided with a filling pipeline interface, and the filling slurry can be introduced into the mined-out area of the long advance section through the filling pipeline. After curing, the filling body has a compressive strength.

[0037] In the present application, the retaining wall can be constructed by pouring reinforced concrete.

[0038] In the present application, the filling body is prepared by mixing full tailings and cement slurry, and is prepared and transported by a mine filling system. After curing, the filling body has a strength of not less than 2MPa.

[0039] Firstly, the present application can adapt to different ore bodies, and multiple sections in the whole panel can be simultaneously mined, and the ground pressure activity can be effectively controlled. The panel belt transportation lane and the belt transportation system can solve the problems of ore discharge and transportation, and can solve the problems of large cutting engineering amount, difficult construction and management caused by the traditional ore pass.

[0040] In the preparation engineering, the panel belt transportation lane, the preparation slope and the cutting lane need to be reserved with ore or surrounding rock as a security pillar according to the results of rock mechanics research, thereby effectively improving the engineering safety.

[0041] In the mining process, the long advance sections in multiple sections in the whole panel are simultaneously mined with a safe distance, and the mined-out area is treated immediately after the mining operation. After the curing of the filling body, the adjacent long advance sections are mined, thereby effectively controlling the ground pressure. This method can utilize the production capacity of the whole panel, and all the long advance sections in the whole panel do not need to be reserved with a pillar between the panels, a section pillar and a panel pillar. The mined-out area can be treated in time, thereby effectively improving the safety of the long advance section mining.

[0042] In the filling process, the long advance section is horizontally arranged and both ends are cutting lanes, so that the retaining wall and the filling pipeline can be flexibly arranged. The section filling or the whole filling can be used to improve the roof contact rate of the filling body in the mined-out area.

[0043] To further illustrate the present application, the following examples are provided in detail.

[0044] A sedimentary phosphate deposit in Yunnan, the ore bed is controlled by the depositional environment, stable distribution, the development of two layers of ore, namely the upper and lower ore layer, and both have industrial value. The upper ore layer lithology is mainly phosphorite, the top is dolomitic phosphorite, the bottom is dolomitic siliceous banded phosphorite. The average thickness of 6.5 m, the average content of P2O5 is 22%. Interlayer lithology is mainly clay shale, the bedding is not obvious, weathered to soil, thickness of 0-3.08 m. The lower ore layer lithology is mainly banded phosphorite, sand-like phosphorite and gravel-like phosphorite. The top is interbedded with gray-black chert band. The average thickness of 5.5 m, the average content of P2O5 is 26%. With underlying Yuhucun group conformable contact, with obvious scouring surface. The roof of the ore bed is phosphorus dolomite, siliceous lump dolomite, hard; the floor is siliceous rock, lithology hard. The occurrence of the ore bed is generally strike NE-SW, dip SE, dip angle generally 2°-31°, average dip angle 15°.

[0045] The mining method is described as follows:

[0046] (1) Panel division: the whole mine is divided into several panels along the strike of the ore body 6, and is divided into multiple sections according to the depth of the ore body 6, and then the sections are divided into several subsections, and the uplink sequential mining is used in the subsections; several panels are divided along the strike of the ore body 6, and multiple sections in the panels are operated simultaneously, and each section is arranged along the strike according to the thickness of the ore body 6.

[0047] In the above panel division steps, the section height is 90 m, the subsection height is 30 m, the panel size is 400 m, and multiple sections in the whole section are operated simultaneously; a long advance is arranged in each section, and the long advance is 4 m wide and 4 m high along the strike of the ore body.

[0048] (2) Preparation engineering: a panel belt conveyor roadway 1 is arranged at the middle position of the panel along the pseudo-inclined direction of the ore body 6, and the belt conveyor roadway 1 can be arranged in the upper and lower wall rocks of the ore body or in the ore body 6 according to the stability of the ore body and the ore body wall rock; a preparation inclined ramp 2 is arranged on both sides of the panel belt conveyor roadway 1 horizontally along the pseudo-inclined direction of the ore body 6, and the preparation inclined ramp 2 can be arranged in the upper and lower wall rocks of the ore body 6 or in the ore body 6 according to the stability of the ore body 6 and the ore body wall rock; a cutting roadway 3 is arranged between the preparation inclined ramp 2 and the stope 7; a section connecting passage 5 is arranged along the strike of the ore body 6, which is used to connect the panel belt conveyor roadway 1, the preparation inclined ramp 2, the cutting roadway 3 and the long advance stope 7; the cutting roadway 3 is arranged in the ore body 6 along the pseudo-inclined direction of the ore body 6; the section connecting passage 5 is arranged to connect the cutting roadways 3 of adjacent panels; no chute is arranged;

[0049] In the above preparation engineering, the panel belt conveyor roadway is arranged in the middle of the panel, along the pseudo-inclined direction of the ore body, the roadway slope is 15°, the section is 1 / 3 three-center arch, the width is 4m, the height is 4m, and C20 sprayed concrete support is adopted; the preparation slope is arranged along the pseudo-inclined direction of the ore body, the average slope of the roadway is 15°, the section is 1 / 3 three-center arch, the width is 4m, the height is 4m, and C20 sprayed concrete support is adopted; the section of the sublevel connection way is 1 / 3 three-center arch, the width is 4m, the height is 4m, and C20 sprayed concrete support is adopted; the cutting roadway is arranged along the pseudo-inclined direction of the ore body, the average slope of the roadway is 15°, the section is 1 / 3 three-center arch, the width is 4m, the height is 4m, and anchor net support is adopted; a 6m wide security ore (rock) pillar is reserved between the panel belt conveyor roadway and the preparation slope; a 6m wide security ore (rock) pillar is reserved between the preparation slope and the cutting roadway;

[0050] (3) Panel transportation system installation: install a belt conveyor in the panel belt conveyor roadway 1; set an ore feeding device at the intersection of the panel belt conveyor roadway 1 and the sublevel connection way 4, for feeding ore to the belt conveyor;

[0051] In the above panel transportation system installation, a crawler-type transfer crusher is selected as the ore feeding device.

[0052] (4) Long drift mechanized mining: complete the mining long drift arrangement: according to the thickness of the ore body 6 and the size of the long drift, the ore body is divided into three to four layers along the plumb direction in each sublevel, and a long drift stope 7 is arranged in each layer. Each long drift stope 7 is arranged horizontally along the strike of the ore body. Along the inclination of the ore body, each layer of long drift is arranged in steps;

[0053] In the above mining long drift arrangement step, the long drift section is rectangular, with a width of 4m and a height of 4m, and anchor net support is adopted; the long drift is arranged horizontally along the strike of the ore body, and the long drift is 180m long. The sublevel height is 30m, the thickness of the upper ore layer, the interlayer, and the lower ore layer is 16m, and the ore body is divided into four layers for complete mining.

[0054] In the cutting roadway 3, the long drift stope 7 is arranged along the strike of the ore body 6, and the length of the long drift stope 7 is the length of the panel. A filling connection roadway or a filling well is constructed at the end of the stope to connect with the adjacent panel cutting roadway 3. The ore in the stope enters the mine hoisting transportation system in sequence through the cutting roadway 3, the sublevel connection way 5, and the panel belt conveyor roadway 1;

[0055] In the above long drift mechanized mining step, the long drift is 180m long, and a filling connection roadway is constructed at the end of the stope to connect with the cutting roadway. The long drift mine house uses a heading machine to cut and fall the ore, and a mine shuttle car to transport the ore.

[0056] (5) Long route filling: erect filling pipeline from the inclined ramp to the long route goaf, build retaining wall to fill the long route with paste slurry in sections, or build retaining wall at both ends of the long route stope 7, then use filling pipeline to fill the long route with paste slurry after the stope is closed;

[0057] In the above long route filling step, retaining walls are built at both ends of the long route stope to close the stope, DN250 filling pipeline interfaces are reserved at the upper part of the retaining walls, filling pipeline enters the goaf through the reserved interfaces, and whole tailings mixed with cement slurry is used as the filling body.

[0058] (6) Continuous production operation: after the long route stope 7 is mined, the goaf is filled. After the curing of the filling body in the goaf is completed, the adjacent long route stopes 7 are mined in turn until the long route stopes 7 in the section are all mined and filled.

[0059] Although the application has been described with reference to the exemplary embodiments thereof, it should be understood that modifications and variations can be made by those skilled in the art, which would fall within the scope of the disclosure. More specifically, various modifications and variations are possible in the constituent elements or layout according to the scope of the disclosure, drawings and claims. In addition to the modifications and variations of the constituent elements or layout, other uses will be apparent to those skilled in the art.

Claims

1. A method for long-pass backfilling mining of a gently dipping, medium-thick ore deposit, comprising the following steps: S1. Panel division: The entire mine is divided into several panels along the strike of the ore body (6). Each panel is further divided into multiple intermediate sections, and each intermediate section is further divided into several sub-sections. In each sub-section, an upward sequential mining method is adopted. Multiple sub-sections in a single panel are operated simultaneously. Each sub-section is arranged with a long access stop (7) along the strike of the ore body (6). S2. Preparatory Works: A panel conveyor belt roadway (1) is arranged in the middle of the panel along the pseudo-dip direction of the ore body (6). The panel conveyor belt roadway (1) is arranged in the surrounding rock of the upper and lower walls of the ore body or in the ore body (6). Preparatory ramps (2) are arranged on both sides of the panel conveyor belt roadway (1) in the horizontal direction and along the pseudo-dip direction of the ore body (6). A cutting roadway (3) is arranged between the preparatory ramp (2) and the long access stope (7). A segmented connecting roadway (4) is arranged along the strike of the ore body (6) to connect the panel conveyor belt roadway (1), the preparatory ramp (2), the cutting roadway (3), and the long access stope (7). The cutting roadway (3) is arranged in the ore body (6) along the pseudo-dip direction of the ore body (6). The segmented roadway (5) connects the adjacent panel cutting roadway (3). No ore pass is arranged. S3. Installation of panel transport system: Install a belt conveyor in panel belt transport roadway (1); set up a ore feeding device at the intersection of panel belt transport roadway (1) and segmented connecting roadway (4) to supply ore to the belt conveyor; S4. Mechanized mining of long access road: Long access road mining 7 uses rock drilling rigs to blast ore and shovels to extract ore, or tunneling machines to cut ore and mine shuttle cars or small mine trucks to transport ore; In the long access road mining 7, ore enters the mine hoisting and transportation system through the cutting roadway (3), the segmented connecting roadway (4), and the panel belt conveyor roadway (1) in sequence; S5. Long Advance Road Filling: A filling well is constructed at the end of the long advance road mining area (7), and the filling well is connected to the cutting roadway (3) of the adjacent panel; a filling pipeline is erected from the mining ramp (2) to the long advance road goaf, and retaining walls are built in sequence to fill the long advance road goaf in sections; or after the retaining walls are built at both ends of the long advance road mining area (7) to close it, the whole area is filled. S6. Continuous production operation: After the long access road mining operation (7) is completed, the goaf is filled; after the curing of the filling body in the goaf is completed, the adjacent long access road mining operations (7) are mined in sequence until all the long access road mining operations (7) in this section are mined and filled.

2. The method for long-pass backfilling mining of a gently dipping, medium-thick ore deposit according to claim 1, characterized in that: The steps for arranging the long access road mining area (7) are as follows: In each segment, the ore body (6) is divided into three to four layers along the plumb line, with a layer width of 4m to 5m and a height of 4m to 5m. In each layer, the long access road mining area (7) is arranged. Each long access road mining area (7) is arranged horizontally along the strike of the ore body (6), and the long access roads of each layer are arranged in a stepped manner along the dip of the ore body (6). The length of the long access road mining area (7) is the length of the panel.

3. The method for long-pass backfilling mining of a gently dipping, medium-thick ore deposit according to claim 1, characterized in that: In step S1, the segment height is 10m to 30m, and the disk area size is 400m ± 100m.

4. The method for long-pass backfilling mining of a gently dipping, medium-thick ore deposit according to claim 1, characterized in that: The cross-section of the conveyor belt transport tunnel (1) in the panel area is a 1 / 3 three-center arch, with a width of 3m to 4m and a height of 3m to 4m, and is supported by C20 shotcrete.

5. The method for long-pass backfilling mining of a gently dipping, medium-thick ore deposit according to claim 1, characterized in that: The cross-section of the mining ramp (2) is a 1 / 3 three-center arch, 4m to 5m wide and 4m to 5m high, and is supported by C20 shotcrete.

6. The method for long-pass backfilling mining of a gently dipping, medium-thick ore deposit according to claim 1, characterized in that: The section connecting road (4) has a 1 / 3 three-center arch cross section, with a width of 4m to 5m and a height of 4m to 5m, and is supported by C20 shotcrete.

7. The method for long-pass backfilling mining of a gently dipping, medium-thick ore deposit according to claim 1, characterized in that: The cut tunnel (3) has a 1 / 3 three-center arch cross section, with a width of 4m to 5m and a height of 4m to 5m, and is supported by anchor mesh.

8. The method for long-pass backfilling mining of a gently dipping, medium-thick ore deposit according to claim 1, characterized in that: The loading device is one of the following: a transfer machine, a tracked transfer crusher, or a chute.

9. A method for long-pass backfilling mining of a gently dipping, medium-thick ore deposit according to claim 1, characterized in that: The retaining wall used for filling is a reinforced concrete retaining wall.

10. A method for long-pass backfilling mining of a gently dipping, medium-thick ore deposit according to claim 1, characterized in that: The filling material is a mixture of tailings and cement slurry, which is prepared and transported by the mine filling system.

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