TBM (Tunnel Boring Machine)-based steeply inclined thin vein non-explosive continuous mining method

Abstract

The invention discloses a steeply inclined thin vein non-explosive continuous mining method based on a TBM (Tunnel Boring Machine), and solves the problems that corner ore bodies are difficult to dispose, the turning radius of the TBM is limited and the mining efficiency is influenced when the TBM is applied to underground ore body mining in the existing method. Ores are conveyed to a mining area draw shaft through a belt for ore removal, supporting equipment matched with a TBM is used for supporting, unmined ore is recycled through corner ore bodies generated in the TBM tunneling process, a spiral slope ramp is arranged at the end of each ore body, and small-radius turning of the TBM is achieved; according to the method, the problems that underground turning of the TBM is difficult and the TBM is difficult to enter the next layer for mining are solved by additionally arranging the spiral ramp layer changing project; the walking problem of the TBM when the next layer is stoped is ensured; and a non-metal supporting material and TBM supporting equipment are adopted, so that the stoping of the next layer is not influenced on the premise of safety, and the mining efficiency is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of mining, and particularly relates to a non-explosive continuous mining method for steeply inclined thin ore veins based on a TBM. BACKGROUND

[0002] At present, in metal / non-metal underground mines, the drilling and blasting method is mainly used for the mining of inclined and steeply inclined thin ore bodies. This method has the advantages of low cost and strong applicability. However, it has problems such as complex and discontinuous mining process, large blasting disturbance of adjacent surrounding rock / filling body, high safety risk of blasting equipment, high price, etc. Compared with the drilling and blasting method, non-explosive mechanical continuous mining has the advantages of high tunneling efficiency, small excavation disturbance, continuous operation, high safety, etc., and is expected to replace the traditional drilling and blasting method for mining in metal and non-metal mines in the future.

[0003] As known, TBM is mainly applied to long-distance tunnel or roadway construction, and its application in the field of metal and non-metal underground mining is still blank. The principle is to rely on the rotation and advancement of the cutter head, and the disc-shaped cutter breaks the rock to form the tunnel in one pass. The rock breaking advantage of TBM is outstanding, the rock breaking tool can break the rock with strong pressure and rotary force, and it has stronger adaptability to hard rock conditions; the excavation of the entire tunnel section is completed at one time, without the need for multiple movements and position adjustments, improving the continuity and efficiency of construction; the operation is in a closed mode, and the operator operates in the control room inside the main machine, away from the working face, greatly improving the safety. At present, TBM is only used for excavating roadways when applied in metal / non-metal mines, but there are still many bottlenecks in applying TBM to underground ore body mining, such as:

[0004] (1) There are certain requirements for the occurrence of ore bodies when TBM is used for underground mining. For example, if the ore body is too thin, the use of TBM for mining will result in high dilution, and if the ore body is too thick, it needs to be widened twice; if the ore body has too small a dip angle, it will result in high dilution, and the corner ore body is difficult to dispose.

[0005] (2) It is difficult to achieve TBM small-radius turning and quickly enter the upper sublevel for mining. The equipment has a large external size, and requires a large turning radius. The minimum turning radius needs to be more than 30m. In the complex spatial distribution of metal / non-metal underground mine roadway engineering, the TBM turning radius is limited. Under the condition of not affecting the designed connecting transportation and roadway and tunneling efficiency, it is difficult to add a turning radius of more than 30m, which is not convenient for TBM to turn into the next sublevel for mining, affecting the mining efficiency.

[0006] (2) TBM is a continuous tunneling method. When the stability of the ore body is poor, the stability of the long-distance stope is difficult to guarantee. In addition, when using upward sublevel filling mining, the equipment needs to walk and work on the lower sublevel filling body, which requires high strength of the filling body.

[0007] (3) TBM excavation section is circular and the disturbance to surrounding rock is small, and the support scheme designed for drilling and blasting method and arched roadway will inevitably have problems such as over-supporting or insufficient supporting.

[0008] (4) If a shovel is used for ore mining, the inverted arch must be backfilled, and the intermittent ore mining of the shovel will affect the efficiency of the continuous tunneling of the TBM.

[0009] In view of the above problems, we propose a non-explosive continuous mining method for steeply inclined thin veins based on TBM. SUMMARY

[0010] The present application aims to solve the problems of difficult disposal of corner ore body, limited TBM turning radius and low mining efficiency when TBM is applied to underground ore body mining.

[0011] At present, when TBM is applied to underground ore body mining, the corner ore body is difficult to dispose, the TBM turning radius is limited, and the mining efficiency is affected. In view of the above problems, we propose a non-explosive continuous mining method for steeply inclined thin veins based on TBM. In short, when the method is implemented, first, different sizes of TBM cutters are used to excavate sectional connecting drifts, TBM stope excavation is used for mining, belts are used to transport ore to the ore district chute for ore mining, and TBM supporting equipment is used for support. The corner ore body generated during TBM excavation is used to recover unsampled ore, and a spiral ramp is set at the end of the ore body to realize TBM small radius turning. The present application solves the problems of difficult TBM turning in the mine and difficult entry into the next sublevel mining by adding a spiral ramp turning layer project. When filling, the cemented filling is filled immediately after mining to ensure the walking of TBM in the next sublevel mining. Non-metallic support materials and TBM supporting equipment are used to ensure safety without affecting the next sublevel mining. Instead of a shovel, a belt is used for continuous ore mining to maintain continuity of mining and ore mining, improve mining efficiency, and replace traditional drilling and blasting method to achieve safe, efficient and continuous mining.

[0012] The present application is implemented as follows: a non-explosive continuous mining method for steeply inclined thin veins based on TBM, comprising:

[0013] S1, cutting and preparation, different sizes of TBM cutters are used to excavate sectional connecting drifts;

[0014] S2, stope excavation, TBM stope excavation is used for mining instead of the traditional drilling and blasting method of rock drilling, charging and blasting;

[0015] S3, mining, excavating a mining area chute on one side of the corresponding sublevel connecting gallery of each ore room, installing a belt at the rear end of the TBM, the belt passing through the sublevel connecting gallery to the mining area chute, and transporting the ore to the mining area chute by the belt for mining;

[0016] S4, filling and supporting, supporting by the supporting equipment matched with the TBM during the TBM excavation, and constructing a filling retaining wall at a certain distance interval near the two sublevel connecting galleries in order to reduce the exposed area and time of the mining area, and the filling pipeline passing through the filling air return shaft and being erected to the mining area through the sublevel connecting gallery for filling;

[0017] S5, ventilation, setting one filling air return shaft in each ore room, and assisting ventilation by the local ventilation fan, and returning air through the sublevel connecting gallery;

[0018] S6, corner ore body recovery, recovering unsampled ore by the corner ore body generated during the TBM excavation;

[0019] S7, recovery process when the thickness of the ore body suddenly changes, drilling a horizontal medium-length hole to blast the thickened part of the ore body for recovery in the case of sudden thickness change of the ore body during excavation;

[0020] S8, spiral ramp turning layer engineering, the TBM turning needs a turning radius of more than 30 m, therefore, a spiral ramp is arranged at the end of the ore body to realize the TBM small-radius turning and quickly enter the next sublevel recovery.

[0021] Preferably, the sublevel connecting gallery is excavated by the TBM, the periphery is expanded into a three-center arch to facilitate the TBM passing, spiral ramps are arranged at both ends of the ore body to meet the turning requirements of the TBM, and the TBM turns around at the end of the spiral ramp at the end of the ore body after the recovery of the current sublevel to enter the next sublevel recovery.

[0022] Preferably, in step S4, no support is used for stable conditions, and the TBM matched equipment anchor net support is used for local broken sections, and non-metallic support materials are used to avoid the influence of the anchor rod of the lower sublevel on the equipment during the recovery of the upper sublevel.

[0023] Preferably, in step S6, the corner ore body is the part that the cutter head fails to excavate after the TBM excavation, and the unsampled ore is recovered by caving the corner ore body.

[0024] Preferably, in step S6, the medium-length hole and the shallow hole are drilled to cave the corner ore body, the blast hole is arranged in a fan shape, the blast hole diameter is 38-42 mm, the hole depth is 1.5-2.5 m, and the specific hole depth is determined according to the actual ore and rock.

[0025] Preferably, in step S8, the spiral ramp layer transfer engineering turning mode is a spiral upward convenient TBM to turn at a small radius and quickly reach the next sublayer, the turning path is a spiral ramp turning set at the end of the ore body after the recovery of a sublayer, and the spiral ramp turning is also set at the other end of the ore body after the recovery of a second sublayer to turn around, and so on.

[0026] Compared with the prior art, the embodiment of the application has the following beneficial effects:

[0027] The application adds a spiral ramp layer transfer engineering to solve the problem that the TBM is difficult to turn and enter the next sublayer for mining in the underground; the cemented filling is filled when mining to ensure the walking of the TBM when recovering the next sublayer; the non-metallic supporting material and the TBM supporting equipment are used to ensure safety without affecting the recovery of the next sublayer; the belt continuous ore drawing is used instead of the shovel-truck to keep the continuity of the recovery and ore drawing, improve the mining efficiency, and replace the traditional drilling and blasting method to achieve safe, efficient and continuous recovery.

[0028] In the embodiment of the application, the TBM is applied to the upward drift filling mining method, compared with the drilling and blasting method, the TBM mining makes the full-face one-time forming, has high tunneling efficiency, small excavation disturbance, and the TBM mining process is continuous from one end of the ore body to the other end, and the longer the trend of the inclined and steeply inclined thin ore vein is, the more obvious the advantage is.

[0029] In the embodiment of the application, the spiral ramp layer transfer engineering is added in the preparation engineering to realize the TBM turning at a small radius in the underground, and quickly enter the next sublayer for recovery after the recovery of a sublayer, reduce the engineering quantity required by the TBM turning, and use the stope and sublayer communication way, use the belt conveyor to transport the ore to the mine shaft for ore drawing, do not use the shovel-truck intermittent ore drawing, effectively improve the TBM tunneling efficiency; and adopt a closed operation, the operator operates in the internal control room of the main machine, away from the working face, and the safety is greatly improved.

[0030] In this embodiment of the invention, the preparatory engineering is similar to that of the traditional drill-and-blast method, mainly including stage transport roadways, layered connecting roads, preparatory ramps, mining area ore passes, and backfilling return air shafts, etc., and an additional spiral ramp transfer engineering is added; during mining, each layer is mined using TBM tunneling, eliminating processes such as rock drilling, charging, wiring, and blasting; during ore extraction, the ore is transported to the mining area ore pass using belt conveyors through the mining area and layered connecting roads; during support, no support is provided in stable conditions; in locally fractured sections, TBM-equipped anchor mesh (spraying) support is used, and non-metallic support materials are used as much as possible to avoid the impact of lower layer anchor bolts on the equipment during the upper layer mining process; during backfilling, in order to reduce the exposed area and time of the mining area, backfilling retaining walls are constructed near the two layered connecting roads at certain intervals, and backfilling pipelines are erected to the mining area through the backfilling return air shaft and layered connecting roads for backfilling, and finally, belt conveyors are used to transport the ore to the mining area ore pass. Attached Figure Description

[0031] Figure 1 A front view of the application of a TBM-based non-explosive continuous mining method for steeply dipping thin veins is shown.

[0032] Figure 2 yes Figure 1 Schematic diagram of the cross section along the middle II-II direction.

[0033] Figure 3 yes Figure 1 Schematic diagram of cross section along line III-III.

[0034] Figure 4 The cross-sectional view of the segmented connecting roadway provided by the present invention is shown.

[0035] Figure 5 A schematic diagram of the spiral ramp transition engineering required for the TBM provided by the present invention is shown.

[0036] Figure 6 This invention illustrates a method for recovering corner ore bodies left during TBM mining.

[0037] In the diagram: 1-Stage transport roadway, 2-Mining ramp, 3-Sectional connecting roadway, 4-Layered connecting roadway, 5-Mining area ore pass, 6-Ore pass connecting roadway, 7-Backfilling return air shaft, 8-Corner ore body. Detailed Implementation

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application; the application described in this specification and claims and the aforementioned drawings will be understood to include all modifications equivalent in scope to the embodiments described herein. The terms "comprise", "comprising", "including", "containing", "have" and "having" and any variations thereof are intended to cover a non-exclusive inclusion. The terms "first", "second", and the like specify different objects, not a specific order.

[0039] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive or alternative embodiments. It is expressly understood that the embodiments described herein are merely examples from a whole class of comparable embodiments which those skilled in the art will readily appreciate.

[0040] At present, when the TBM is applied to the underground ore body mining, the corner ore body is difficult to handle, the TBM turning radius is limited, and the mining efficiency is affected. In view of the above problems, a non-explosive continuous mining method for steeply inclined thin veins based on TBM is provided. In short, when the method is implemented, first, different sizes of TBM cutters are used to excavate sectional communication drifts 3, TBM stope excavation is used for stoping, belts are used to transport ore to the ore drawing shaft 5 for ore drawing, TBM supporting equipment is used for supporting, corner ore bodies 8 generated in the TBM excavation process are used to recover unsampled ore, and a spiral ramp is arranged at the end of the ore body to realize TBM small radius turning. The present application solves the problems of difficult TBM turning and difficult entry into the next sublevel mining by adding a spiral ramp turning layer project; the cemented filling is filled during filling to ensure the walking of TBM during the next sublevel mining; the non-metallic supporting material and the TBM supporting equipment are used to ensure the safety under the premise of not affecting the next sublevel mining; the belt continuous ore drawing is used instead of the shovel loader to keep the continuity of the stoping and ore drawing, improve the mining efficiency, and replace the traditional drilling and blasting method to achieve safe, efficient and continuous stoping.

[0041] It should be noted that the TBM is a full-face tunnel boring machine (TBM, Tunnel Boring Machine), which is a large tunneling equipment used in tunnels and underground engineering. It can efficiently excavate tunnels under various geological conditions and is widely used in subway, railway, highway, water conservancy, energy and other fields.

[0042] The embodiment of the application provides a non-explosive continuous mining method for steeply inclined thin veins based on TBM, which comprises the following steps: Figures 1-3As shown, the TBM-based non-explosive continuous mining method for steeply inclined thin ore veins specifically comprises:

[0043] S1, cutting for mining preparation, using TBM cutters of different sizes to excavate sectional connecting drifts 3;

[0044] In the embodiment of the present application, when cutting for mining preparation, TBM is used to excavate sectional connecting drifts 3, Figure 4 The sectional connecting drift 3 cross-sectional view provided by the present application is shown, and the periphery is expanded into a three-center arch to facilitate TBM passage, and spiral ramp turning layer engineering is arranged at both ends of the ore body to meet the turning requirements of TBM. After TBM mining in the current layer, it turns around through the spiral ramp at the end of the ore body to enter the next layer for mining. Similar to the mining preparation engineering of the traditional drilling and blasting method, the difference is that TBM is used to excavate sectional connecting drifts, spiral ramp turning layer engineering is added to realize TBM small radius turning and rapid entry into the next layer.

[0045] S2, stope excavation, using TBM stope excavation to replace the traditional drilling and blasting method of drilling, charging, and blasting;

[0046] It should be noted that TBM is used for one-time mining of each layer of thin ore veins, replacing the traditional drilling and blasting method. Compared with the drilling and blasting method, TBM mining enables full-face one-time forming, high excavation efficiency, and small excavation disturbance. The TBM mining process is continuous from one end of the ore body to the other end, and the longer the strike of the inclined and steeply inclined thin ore vein, the more obvious the advantage.

[0047] S3, ore extraction, excavating a mining area chute 5 on one side of the sectional connecting drift 3 corresponding to each ore room, installing a belt at the rear end of the TBM, and connecting the belt to the mining area chute through the layer connecting passage 4. Ore is transported to the mining area chute 5 for ore extraction, and the ore is transported to the mining area chute 5 through the belt via the layer connecting passage;

[0048] S4, filling and supporting, supporting with TBM supporting equipment during TBM excavation, in order to reduce the exposed area and time of the stope, filling retaining walls are constructed near the two layer connecting passages 4 at certain intervals, and filling pipes pass through the filling air return shaft 7 and are erected to the stope through the layer connecting passage 4 for filling;

[0049] It is to be noted that, for the stable condition, no support is adopted, the local broken section adopts the TBM supporting equipment anchor net support, the non-metal support material is adopted, the influence of the lower layer anchor rod on the equipment in the upper layer stoping process is avoided, in the support, the stable condition is not supported, the metal anchor rod, the mesh and the like are not adopted, only the anchor net support is carried out for the local broken part, the problems of the possible excessive support and the insufficient support are solved, and the influence of the lower layer anchor rod on the upper layer stoping is avoided, and when the filling is carried out, the filling retaining wall is constructed near the two layer communication passages 4 at a certain distance, the exposed area and the time of the stope are effectively reduced, the strength of the filling body is determined according to the weight of the TBM equipment, so as to support the TBM walking.

[0050] S5, ventilation, each mine chamber is provided with a filling return air shaft 7, auxiliary ventilation is carried out by using a local fan, and the return air is passed through the layer communication passage 4;

[0051] In the embodiment of the present application, the local fan auxiliary ventilation mentioned is that when the TBM is excavated in each layer, the local fan is used to send the fresh air flow in the filling return air shaft into the stope working face, and the dirty air is discharged.

[0052] S6, corner ore body 8 recovery, the unsampled ore is recovered through the corner ore body 8 generated in the TBM excavation process; in the step S6, the corner ore body 8 is the part which is not excavated by the cutter head after the TBM excavation, and the unsampled ore is recovered through the corner ore body 8, Figure 6 The corner ore body 8 recovery mode left by the TBM mining provided by the present application is shown, the corner ore body 8 is drilled and blasted in a medium-length hole and a shallow hole, the blast hole is arranged in a fan shape, the blast hole diameter is 38-42mm, the hole depth is 1.5-2.5m, and the specific hole depth is determined according to the actual mine rock.

[0053] S7, stoping process when the ore body thickness suddenly changes, aiming at the change of the ore body thickness, the sudden change of the ore body thickness in the excavation process, the TBM does not completely sample the ore, and the part of the thickened ore body is recovered by drilling a horizontal medium-length hole and blasting;

[0054] S8, spiral ramp turning layer engineering, the TBM turning needs a turning radius of more than 30m, therefore, the spiral ramp is arranged at the end of the ore body to realize the small-radius turning and quick entering of the TBM into the next layer stoping.

[0055] It should be noted that, Figure 5 The application provides a TBM required spiral ramp transfer layer engineering schematic diagram, in step S8, the spiral ramp transfer layer engineering turning mode is spiral upward turning for conveniently turning the TBM at a small radius and quickly reaching the next sublayer, the turning path is the spiral ramp turning arranged at the end of the ore body after mining of one sublayer, and the spiral ramp turning is also arranged at the other end of the ore body after mining of the second sublayer, and the turning is repeated.

[0056] In the embodiment, Figure 1 The application provides an application front view of the TBM based steeply inclined thin ore vein non-explosive continuous mining method. The sublevel connection way 4 is longitudinally provided with multiple layers, at least one group of sectional connection drifts 3 is arranged in the sublevel connection way 4, the sectional connection drift 3 and the sublevel connection way 4 form a stage transportation roadway 1, and the sublevel connection ways 4 are connected through the mining preparation inclined ramp 2. One side of the mining area chute 5 is provided with a chute connection way 6, one end of the chute connection way 6 away from the mining area chute 5 is connected with the filling air return shaft 7 and the mining preparation inclined ramp 2, and the mining area chute 5 is used for discharging dirty air.

[0057] In conclusion, the application provides the TBM based steeply inclined thin ore vein non-explosive continuous mining method. The spiral ramp transfer layer engineering is additionally arranged to solve the problem that the TBM is difficult to turn and enter the next sublayer for mining in the mine. The cemented filling is adopted during filling to ensure the walking of the TBM during mining of the next sublayer. The non-metallic supporting material and the TBM supporting equipment are adopted to ensure the safety and not affect the mining of the next sublayer. The belt continuous ore discharge is used to replace the shovel-truck, the continuity of the mining and ore discharge is maintained, the mining efficiency is improved, and the traditional drilling and blasting method is replaced to achieve safe, efficient and continuous mining.

[0058] In the embodiment, the TBM is applied to the upward drift filling mining method, compared with the drilling and blasting method, the TBM mining enables the full-face one-time forming, the tunneling efficiency is high, the excavation disturbance is small, the TBM mining process is continuous from one end of the ore body to the other end, and the longer the trend of the inclined and steeply inclined thin ore vein is, the more obvious the advantage is.

[0059] In the embodiment, the spiral ramp transfer layer engineering is additionally arranged in the mining preparation engineering, the TBM can turn at a small radius in the mine, and can quickly enter the next sublayer for mining after mining of one sublayer, the engineering quantity required by the TBM turning is reduced, the ore is transported to the mining area chute 5 for ore discharge by using the belt conveyor, the intermittent ore discharge by using the shovel-truck is not adopted, the TBM tunneling efficiency is effectively improved, the closed operation is adopted, the operator operates in the internal control room of the main machine, is far away from the working face, and the safety is greatly improved.

[0060] It should be noted that, for the foregoing embodiments, for the sake of simple description, they are all expressed as a series of action combinations, but those skilled in the art should know that the present application is not limited by the order of the described actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to the present application.

[0061] The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the protection scope of the application. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on these embodiments, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application. Although the present application has been described in detail with reference to the above embodiments, those of ordinary skill in the art can still combine, add or delete or make other adjustments to the features of the embodiments of the present application according to the circumstances without conflict and without creative labor, so as to obtain different other technical solutions which do not deviate from the concept of the present application in essence. These technical solutions also belong to the scope of the present application.

Claims

1. A non-explosive continuous mining method for steeply dipping thin veins based on TBM, characterized in that, include: S1. Precision cutting, using TBM cutter heads of different sizes to excavate segmented connecting tunnels (3); S2. Mining excavation: TBM mining excavation is used to replace the traditional drilling and blasting method of rock drilling, charging, and blasting. S3. Mining: The mining area pass (5) is excavated on one side of the segmented connecting roadway (3) corresponding to each mine. A belt is installed at the rear end of the TBM. The belt is connected to the mining area pass through the layered connecting roadway (4). The ore is transported to the mining area pass (5) by the belt for mining. S4. Filling and support: During the TBM tunneling process, the TBM is supported by the support equipment. Filling retaining walls are constructed near the two layered connecting channels (4) at certain intervals. The filling pipeline passes through the filling return air shaft (7) and is erected through the layered connecting channels (4) to the mining area for filling. S5. Ventilation: Each mine is equipped with a filling return air shaft (7), which uses local ventilation fans for auxiliary ventilation and returns air through the layered connecting passage (4); S6, Corner Ore Body (8) Recovery: Unmined ore is recovered through the corner ore body (8) generated during TBM tunneling. S7. Mining process when the ore body thickness changes abruptly: In the case of a sudden increase in ore body thickness during excavation, the TBM cannot completely recover the ore. The thickened part of the ore body is recovered by drilling horizontal medium-deep holes and blasting. S8, Spiral Inclined Ramp Transition Project: A spiral inclined ramp is set at the end of the ore body to enable the TBM to make small-radius turns and quickly enter the next layer for mining.

2. The non-explosive continuous mining method for steeply inclined thin veins based on TBM as described in claim 1, characterized in that: When cutting the mining section, the TBM is used to excavate the connecting horizontal tunnel (3), and the surrounding area is expanded into a three-center arch to facilitate the passage of the TBM. Spiral ramps are set at both ends of the ore body to meet the turning requirements of the TBM. After the mining of this layer is completed, the TBM turns around through the spiral ramp at the end of the ore body to enter the next layer for mining.

3. The non-explosive continuous mining method for steeply inclined thin veins based on TBM as described in claim 2, characterized in that: In step S4, no support is used for stable conditions, and TBM-equipped anchor mesh support is used for locally fractured sections.

4. The non-explosive continuous mining method for steeply inclined thin veins based on TBM as described in claim 3, characterized in that: In step S6, the corner ore body (8) is the part that the cutterhead could not reach after the TBM tunneling. Unmined ore is recovered by breaking down the corner ore body (8).

5. The non-explosive continuous mining method for steeply inclined thin veins based on TBM as described in claim 4, characterized in that: In step S6, the corner ore body is broken by drilling medium-deep holes and shallow holes (8), and the blast holes are arranged in a fan shape.

6. The non-explosive continuous mining method for steeply inclined thin veins based on TBM as described in claim 5, characterized in that: In step S6, the diameter of the borehole is 38-42mm and the depth is 1.5-2.5m.

7. The non-explosive continuous mining method for steeply inclined thin veins based on TBM as described in claim 1, characterized in that: In step S8, the spiral ramp turning method of the layer-turning project is a spiral ascent to facilitate the TBM to turn with a small radius and quickly reach the next layer. The turning path is a spiral ramp set at the end of the ore body after the mining of one layer, and a spiral ramp is also set at the other end of the ore body after the mining of the second layer.

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