A mechanized mining structure and method for a multilayer vein-like steeply inclined thin ore body

Abstract

The application discloses a mechanized mining structure and method for multilayer vein steeply inclined thin ore body, which divides the ore body into several middle sections, arranges middle section transportation roadways along the ore body, arranges several vein penetrating roadways perpendicularly to the ore body from the middle section transportation roadways, arranges vein along pull bottom roadways along the ore body from the exposed ore body between two adjacent vein penetrating roadways, arranges vein outside mining roadways along the ore body lower plate, arranges vein penetrating roadways at both ends of the vein along pull bottom roadways and vein outside mining roadways, arranges several mining accesses between the vein along pull bottom roadways and the vein outside mining roadways, arranges one ore mining auxiliary slope at each end of the vein outside mining roadways close to the vein penetrating roadways, and arranges one reverse chamber at each end of the vein outside mining roadways close to any vein penetrating roadway, which is used for the shovel truck to reverse and turn. The mining structure and method can reduce the mining and cutting engineering quantity, reduce the production cost and labor intensity, and improve the mining and cutting efficiency and the overall production capacity of the stope.

Description

Technical Field

[0001] This invention belongs to the field of underground mineral deposit mining, specifically relating to a mechanized ore extraction structure and method for multi-layered vein-shaped steeply dipping thin ore bodies. Background Technology

[0002] The thickness and dip angle of multi-layered, steeply dipping, thin ore bodies vary disorderly along the dip direction, and the vein occurrence is complex. Statistics show that shallow-hole ore-stopping currently accounts for 50.7% of the mining of such ore bodies. Traditional shallow-hole ore-stopping methods have low mechanization, high labor intensity, high safety risks, low stope production capacity, and high overall operating costs. Traditional shallow-hole ore-stopping methods generally employ funnel ore discharge along the vein roadway, or ore discharge using a loader and ore pass. For multi-vein ore bodies, in order to control the dilution rate, single-vein mining is carried out as much as possible, resulting in multiple stopes. This leads to a large number of funnels when using hopper ore discharge along the vein, resulting in a large amount of mining and cutting work, high construction costs, high labor intensity, and waste of pillar resources. Although using loader and ore pass ore discharge can eliminate the need for pillars, the engineering work of the ore pass and its auxiliary ramps is large. The ore extraction level in the stope is 3-5m higher than the transport level. To facilitate the movement of the loader, the slope of the mining area needs to be constructed, resulting in high mining and cutting costs. Moreover, under the structural parameters of long stopes (stope length of more than 100m), the long-distance round-trip transport efficiency of the loader is low, the energy consumption is high, and it is difficult to give full play to the advantages of mechanized operation. In addition, thin vein ore bodies generally vary greatly along the strike direction, resulting in the exploration layout along the vein is curved, the track laying is difficult, and the mine car operation efficiency is low. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention aims to provide a mechanized ore extraction structure and method for multi-layered vein-shaped steeply dipping thin ore bodies, which can improve the level of mechanized ore extraction from multi-layered vein-shaped steeply dipping thin ore bodies, reduce the amount of mining and cutting work, and save production costs.

[0004] To achieve the above objectives, this invention provides a mechanized ore extraction structure for multi-layered, vein-shaped, steeply dipping thin ore bodies. The underground ore body to be mined is divided into several intermediate sections. Intermediate haulage roadways are arranged along the strike of the ore body. From these intermediate haulage roadways, several cross-vein roadways are arranged perpendicular to the strike of the ore body, penetrating the ore body. From the point where one of the cross-vein roadways exposes the ore body, a cross-vein bottom-pull roadway is arranged along the strike of the ore body towards the adjacent cross-vein roadway. Both ends of the cross-vein bottom-pull roadway are connected to the cross-vein roadways. Between two adjacent cross-vein roadways… A vein-exit ore roadway is arranged along the footwall of the ore body. Both ends of the vein-exit ore roadway are connected to the cross-vein roadway, and the connection point is the ore outlet. Several ore outlet routes are arranged between the vein-pull-down roadway and the vein-exit ore roadway. At each end of the vein-exit ore roadway, near the cross-vein roadway, an auxiliary ore outlet ramp is arranged. A reversing chamber is arranged near either end of the vein-exit ore roadway near the cross-vein roadway. The outlet of the reversing chamber is connected to the opening of the ore outlet route at the far end on the same side.

[0005] In the above-mentioned ore extraction structure, the vein-side bottom roadway is excavated following the vein's direction, serving as an exploration roadway and simultaneously as a recovery ore extraction roadway; the vein-outside ore extraction roadway serves as a ore transport roadway, designed as a straight, trackless roadway to improve equipment passage efficiency; the ore extraction auxiliary ramp is used to assist in unloading ore; the reversing chamber is used for reversing and turning around, and is located on the side of the vein-crossing roadway opposite to the ore extraction entrance's diagonal direction. That is, if the ore extraction entrance is arranged diagonally to the left, the reversing chamber is located near the right-side vein-crossing roadway; if the ore extraction entrance is arranged diagonally to the right, the reversing chamber is located near the left-side vein-crossing roadway. The outlet of the reversing chamber is connected to the opening of the ore extraction entrance at the very end of the same side, facilitating the reversing and turning around of the loader in the ore extraction entrance on the same side.

[0006] Furthermore, the adjacent through-vessel tunnels are spaced 100-200m apart.

[0007] Furthermore, the distance between the out-of-vein ore roadway and the bottom-pulling roadway along the vein is 8-12m.

[0008] Furthermore, the ore exit route forms an angle of 45° to 70° with the vein ore exit roadway, and the distance between adjacent ore exit routes is 8 to 10 meters.

[0009] Furthermore, a 3-5m rock pillar is left between the reversing chamber and the adjacent vein roadway to ensure the safety and stability of the reversing chamber; the long axis of the reversing chamber is perpendicular to the vein roadway at 90°; the difference between the length of the reversing chamber and the total length of the loader is ≥0.6m, the difference between the width of the reversing chamber and the width of the loader is ≥1.2m, and the difference between the height of the reversing chamber and the height of the loader is ≥0.6m.

[0010] Furthermore, the slope of the ore extraction auxiliary slope is controlled at 5-10%, and it is constructed using waste rock or wooden planks.

[0011] For thin ore body mining, small scrapers are generally used for ore extraction. The unloading height of the scraper bucket is generally lower than the receiving height of the smallest commonly used mine car. Therefore, an auxiliary ore extraction ramp is required to allow the scraper to directly load ore onto the mine car. At both ends of the ore extraction roadway near the vein inlet, a scraper ramp is constructed using waste rock or wooden planks to raise the scraper bucket when unloading ore onto the mine car, thus completing the unloading process. The slope of the auxiliary ore extraction ramp is controlled between 5% and 10%. Assuming the horizontal length L of the auxiliary ore extraction ramp, the slope β, the maximum unloading height h1 of the scraper, and the receiving height h2 of the mine car, the following condition should be met: L×tanβ+h1-h2≥0.1m.

[0012] Furthermore, at both ends of the vein-side bottom roadway, near the cross-vein roadway, a flexible end partition wall is installed. The flexible end partition wall is 2-3m away from the nearest ore exit roadway on the same side. The flexible end partition wall includes a steel frame, a protective net, and a flexible partition layer. The steel frame is inserted into the rock surrounding the vein-side bottom roadway and fixed. The protective net is tied to the steel frame and fixed in the vein-side bottom roadway by hooks anchored in the rock of the roadway. The flexible partition layer is tied to the protective net on the side facing the stope. Its function is to isolate the collapsed ore and rock in the vein-side bottom roadway during stope mining, preventing the ore and rock fragments from collapsing into the cross-vein roadway and affecting mine car transportation and personnel passage, while ensuring safe space at the bottom entrances and exits of the ventilation shafts at both ends.

[0013] The steel frame end should be inserted into the rock to a depth of not less than 300mm; the mesh size of the protective net should not be greater than 300mm×300mm, the spacing between adjacent hooks should not exceed 300mm, and the hook should be anchored into the rock of the roadway to a depth of not less than 300mm.

[0014] Furthermore, the steel frame material is I-beams.

[0015] Furthermore, the protective net is a steel mesh or a flexible mesh, wherein the flexible mesh can be selected as one or more of steel wire rope mesh, nylon rope mesh, and polyester fiber flexible mesh.

[0016] Furthermore, the flexible partition is made of flexible material, such as geotextile, burlap sacks, foam boards, or discarded ventilation ducts, which has a certain pressure-relief effect and can withstand the influence of ore lateral pressure and blasting vibration.

[0017] Based on the same inventive concept, the present invention also provides a mechanized ore extraction method for multi-layered vein-shaped steeply dipping thin ore bodies, comprising the following steps:

[0018] S1, using the above-mentioned ore extraction structure, construct a bottomless, flat-bottomed ore extraction structure;

[0019] S2, mining and ore collapse begin at the mining site, and the ore falls into the aforementioned vein-side roadway;

[0020] S3, the mining area is equipped with loader and mine car group as ore extraction equipment. The mine car group enters any one of the through-vein roadways at both ends of the mining area and stops at the ore extraction point of the through-vein ore extraction roadway to prepare to receive ore.

[0021] S4, the loader enters the ore outlet roadway and loads ore into the ore outlet path. With the central position as the boundary, different methods are used for ore outlets on the left and right sides:

[0022] S4.a, On the same side as the ore outlet path, the loader moves forward in the ore outlet path to load ore, then reverses and turns to the vein ore outlet roadway, and then moves forward along the vein ore outlet roadway to the ore outlet, using the ore outlet auxiliary ramp to unload ore onto the ore car, and after unloading ore, it re-enters the ore outlet path to start the next ore loading operation.

[0023] S4.b, on the side opposite to the diagonal direction of the ore exit route, the loader first moves forward in the ore exit route to load ore, then reverses and turns to enter the ore exit roadway, continues to reverse to the end reversing chamber, then moves forward to complete the U-turn, and moves forward to the ore exit point. It then uses the ore exit auxiliary ramp to unload ore onto the ore car. After unloading, it reverses again to enter the reversing chamber, turns around and moves out in the diagonal direction of the ore exit route, and enters the ore exit route to start the next ore loading operation.

[0024] S5, calculate the number of times the loader extracts ore per day on each access route to ensure uniform ore extraction in each access route and maintain uniform settlement of the ore pile surface in the stope;

[0025] S6, after the mining operation was completed, a large amount of ore was released;

[0026] S7 uses a remote-controlled loader to recover the triangular ore piles in the bottom roadway along the vein, completing all ore extraction work.

[0027] In step S3 above, the selected mine car bucket volume should be kept as close as possible to the loader bucket volume, that is, one bucket of ore from the loader should just fill one mine car; in step S4 (S4.a, S4.b), when unloading ore, the loader should drive onto the ore discharge auxiliary ramp made of waste rock or wooden planks, and use the slope of the ramp to raise the loader bucket. At this time, the maximum unloading height of the bucket should be 0.1~0.3m higher than the ore receiving height of the mine car, so as to complete the unloading smoothly; in step S5, in order to maintain uniform settlement of the ore pile surface in the mining area, the loader should discharge ore evenly in each ore discharge route. The number of times the loader discharges ore per day in each ore discharge route is calculated as follows;

[0028] Assuming the overall production capacity of the shallow-hole ore-holding method is Q (t / d), and the average weight of the ore and rock is K (t / m³), then... 3 The ore loosening coefficient α, and the bucket capacity of both the loader and the mine car are W (m³). 3The vehicle's full-load coefficient is b, the number of ore exit routes is n, and the daily ore output of the mining area is A (m³). 3 / d), the amount of ore loaded by the loader each time is B (m 3 / times), each route needs to mine C times per day (times / d). Therefore:

[0029] Daily ore output from the mining area A = Q / K × a (m 3 / d);

[0030] The amount of ore loaded by the loader each time is B = W × b (m³). 3 / Second-rate);

[0031] The number of times each route produces ore per day is C = (Q / K×a×n) / (W×b) (times / d);

[0032] Calculating the ore output and number of extractions for each access route using the above method can ensure uniform ore distribution in the mining area, keep the ore pile surface as flat as possible, and improve the efficiency of mining operations.

[0033] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0034] (1) It solved the problem that the loader needs to be equipped with a chute and an auxiliary ramp for ore extraction, which reduced mining and cutting work, lowered production costs, and improved mining and cutting efficiency;

[0035] (2) It realizes the ore extraction of flat-bottomed loader without bottom pillars, reducing the ore loss rate from 15% to 5%;

[0036] (3) The traditional ore discharge hopper has been eliminated, reducing mining and cutting work and labor intensity. The ore discharge by the loader can appropriately disturb the arched bulk material, which is conducive to fluidized ore discharge and reduces blockage accidents.

[0037] (4) For long mining areas, the mine cars exit the mine from both ends of the vein separately, avoiding long-distance transport operations by the loader, greatly improving the ore extraction efficiency and reducing the labor intensity of the driver.

[0038] (5) Based on the production capacity of the mining area and the properties of the ore, the number of times each access road is used to produce ore is reasonably allocated, so as to achieve uniform ore release in the mining area, improve the flatness of the ore pile surface in the mining area, reduce the workload of leveling operations, and improve the comprehensive production capacity, production efficiency and safety guarantee of the mining area.

[0039] Instruction manual illustrations

[0040] Figure 1 This is a top view schematic diagram of the ore extraction structure in one embodiment of the present invention.

[0041] Figure 2 This is a schematic diagram of the cross-sectional configuration of the flexible partition wall at the end of the ore extraction structure according to an embodiment of the present invention.

[0042] Figure 3 This is a schematic diagram of loading ore into the second through-vein roadway in an ore extraction method according to an embodiment of the present invention.

[0043] Figure 4 This is a schematic diagram of loading ore into the first through-vein roadway in an ore extraction method according to an embodiment of the present invention.

[0044] Figure 5 This is a schematic diagram of a shovel loader loading ore onto a ore car via an auxiliary ramp in an ore extraction method according to an embodiment of the present invention.

[0045] In the diagram: 1-Outer vein ore roadway; 2-Ore exit roadway; 3-Pulleyway along the vein; 4-Reversing chamber; 5-Personnel ventilation shaft; 6-End flexible partition wall; 701-First through vein roadway; 702-Second through vein roadway; 8-Ore vein; 9-Mine car group; 10-Shovel loader; 11-Ore exit auxiliary slope; 12-Steel frame; 13-Protective net; 14-Hook. Detailed Implementation

[0046] The present invention will be described in detail below with reference to embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other. For ease of description, the words "upper," "lower," "left," and "right" appearing below only indicate that they are consistent with the upper, lower, left, and right directions of the drawings themselves, and do not limit the structure.

[0047] Example 1

[0048] In this embodiment, a tungsten-tin mine in Guangxi has an average ore body thickness of 0.4m, a dip angle of 80°, and multiple layers. It is a typical multi-layered, vein-like, steeply dipping, extremely thin ore body. A 1m thick ore body was selected. 3 The electric loader 10 is used for ore extraction. The loader 10 is 5800mm long, 1300mm wide, and has a 2000mm high cab. It is equipped with a 1m... 3 Mining car group 9 transports ore; each car is 2140mm long, 1100mm wide, and 1200mm high. A trial mining operation was conducted using the mechanized ore extraction structure and method for multi-layered, vein-like, steeply dipping thin ore bodies provided by this invention. (Reference) Figures 1 to 5 The ore extraction structure and method in this embodiment include the following steps:

[0049] S1 forms a flat-bottomed ore extraction structure without a bottom pillar;

[0050] The underground ore body to be mined is divided into several intermediate sections. Intermediate section transport roadways are arranged along the strike of the ore body. Two cross-vein roadways are arranged perpendicular to the strike of the ore body from the intermediate section transport roadways to penetrate the ore body 8. These are the first cross-vein roadway 701 and the second cross-vein roadway 702. The distance between the two cross-vein roadways (701 and 702) is 100m.

[0051] From the point where the ore body is exposed in the first cross-vein roadway 701, a cross-vein bottom roadway 3 is excavated along the strike of the ore body towards the second cross-vein roadway 702. The two ends of the cross-vein bottom roadway 3 are connected to the two cross-vein roadways (701, 702). Eight meters away from the cross-vein bottom roadway 3, a cross-vein ore outlet roadway 1 is arranged along the footwall of the ore body. The two ends of the cross-vein ore outlet roadway 1 are connected to the two cross-vein roadways (701, 702), and the connection point is set as the ore outlet. Eleven ore outlet access routes 2 are arranged between the cross-vein bottom roadway 3 and the cross-vein ore outlet roadway 1. The ore outlet access routes 2 form a 70° angle with the cross-vein ore outlet roadway 1, and the oblique direction of the ore outlet access routes 2 is towards the second cross-vein roadway 702. The distance between adjacent ore outlet access routes 2 is 8 meters.

[0052] At both ends of the ore-exit roadway 1, near the two cross-vein roadways (701, 702), waste rock is used to form an auxiliary ore-exit ramp 11. When the auxiliary loader 10 unloads ore onto the mine car, it raises its bucket to complete the unloading. According to calculations, the slope of ramp 11 is 6%, and the height of the bucket of the loader 10 after being raised is 1.3m, which is 0.1m higher than the ore-receiving height of the mine car.

[0053] A reverse chamber 4 is excavated near the first cross-vein roadway 701 in the out-of-vein ore roadway 1. The outlet of the reverse chamber 4 is connected to the opening of the ore access roadway 2 at the far end on the same side. Its long axis is at a 90° right angle to the out-of-vein ore roadway 1. A 5m rock pillar is left between the reverse chamber 4 and the cross-vein roadway. The reverse chamber 4 is 6400mm long, 2500mm wide, and 2600mm high.

[0054] Flexible partition walls 6 are installed at the ends of the bottom roadway 3 along the vein, 2m away from the nearest ore exit roadway 2. These walls isolate the collapsed ore and rock within the bottom roadway 3 along the vein, preventing the ore and rock fragments from collapsing into the cross-vein roadway and affecting mine car transportation and personnel passage. At the same time, they ensure safe space at the bottom entrances and exits of the ventilation shafts 5 at both ends.

[0055] The end flexible partition wall 6 is constructed with a steel frame 12 consisting of two I-beams horizontally and two vertically, with both ends of the I-beams inserted into the rock to a depth of 300mm. The protective netting 13 is made of full-section steel mesh with a mesh size of 100mm × 100mm. The steel mesh is tied to the steel frame 12 with wire, and the edges of the steel mesh are fixed to the bottom roadway 3 along the vein using hooks 14. The spacing between adjacent hooks 14 is 300mm, and the hooks 14 are anchored into the rock of the roadway to a depth of 300mm. The flexible partition layer is made of materials such as burlap sacks and discarded ventilation ducts, and is bound to the inner side of the steel mesh facing the stope with wire. The flexible partition layer has a certain pressure-relief effect and can withstand the influence of ore lateral pressure and blasting vibration.

[0056] S2, mining and ore collapse begin at the mining site, and the ore falls into the vein-side roadway 3;

[0057] S3, mine car group 9 first enters the second through-vein roadway 702 and stops at the ore outlet of the mine car group 9 and the mine exit roadway 1 to prepare to receive ore;

[0058] S4, the loader 10 enters the ore outlet roadway 1 and then enters the ore outlet route 2 to load ore. With the central position as the boundary, different methods are used for ore outlets on the left and right sides:

[0059] S4.a, First, start the ore extraction on the side of the second cross-vein roadway 702. The loader 10 moves forward to load ore in the ore extraction access road 2, then reverses and turns to the cross-vein ore extraction roadway 1, and then moves forward along the cross-vein ore extraction roadway 1 to the ore extraction point. It uses the ore extraction auxiliary ramp 11 to unload ore onto the mine car. After unloading, it enters the ore extraction access road 2 again to start the next ore loading operation.

[0060] S4.b After completing the ore extraction on the side of the second cross-vein roadway 702, the mine car group 9 enters the first cross-vein roadway 701 and stops at the ore extraction point where it meets the out-of-vein ore extraction roadway 1 to prepare for receiving ore; the loader 10 begins the ore extraction operation on the side of the first cross-vein roadway 701. The loader 10 first moves forward to load ore in the ore extraction access road 2, then reverses and turns to enter the out-of-vein ore extraction roadway 1, continues to reverse to the end reversing chamber 4, then moves forward to complete the turnaround, moves forward to the ore extraction point, uses the ore extraction auxiliary ramp 11 to unload ore onto the mine car, and after unloading, reverses again to enter the reversing chamber 4, turns around and drives out diagonally in the ore extraction access road 2, and enters the ore extraction access road 2 to start the next ore loading operation;

[0061] S5, the loader 10 evenly discharges ore in each ore discharge route 2, maintaining uniform settlement of the ore pile surface in the stope; the number of times each route discharges ore per day is calculated as follows;

[0062] The overall production capacity of the mining area is 150 tons per day, and the average weight of the ore and rock is 2.7 tons per cubic meter. 3 The ore loosening coefficient is 1.6, and the loader 10 and the mine car bucket capacity are both 1.0 (m³). 3 The vehicle's full-load coefficient is 0.85, there are 11 ore exit routes (2 routes), and the daily ore output from the mining area is 88 (m³). 3 / d), the loader 10 can load 0.85 (m³) of ore per load. 3 / time), each route needs to produce ore 9.3 times per day. Depending on the actual ore production situation, the number of times each route produces ore can be controlled between 9 and 10 times.

[0063] S6, after the mining operation was completed, a large amount of ore was released;

[0064] S7 uses a remote-controlled loader 10 to recover the triangular ore pile in the bottom roadway 3 along the vein, completing all ore extraction work.

[0065] In this embodiment, the comprehensive production capacity of the mining area can reach 150t / d, with a dilution rate of 60% and a loss rate of 5%. In the 100m long vein ore roadway 1, the loader 10 evenly extracts ore to both ends of the vein roadway, avoiding long-distance back-and-forth operations of the loader 10 and improving ore extraction efficiency.

[0066] Comparative Example 1

[0067] A tungsten-tin mine in Guangxi has an average ore body thickness of 0.4m and a dip angle of 80°. The ore body occurs in multiple layers and is a typical multi-layered, vein-like, steeply dipping, extremely thin ore body. The mine is being mined using the traditional manual shallow-hole ore-keeping method.

[0068] A 5m base pillar was installed, and a wooden + concrete funnel was used as the ore extraction structure. The ore cars were loaded into the transport roadway along the vein. There were 19 funnels in total, spaced 5m apart. The construction time for each funnel averaged 3 days, requiring manual pneumatic drilling, resulting in extremely high labor intensity. Due to frequent ore arching and blockage, and the fact that the ore cars occupied most of the space in the roadway, worker handling was difficult and inefficient. The overall production capacity of the stope was less than 70t / d, and the ore loss rate was 15%.

[0069] As can be seen from Comparative Example 1 and Example 1, the mechanized ore extraction structure and method for multi-layered vein-shaped steeply inclined thin ore bodies provided by the present invention greatly improves the level of ore extraction mechanization and the comprehensive production capacity of the mining area, while effectively reducing ore loss rate, labor intensity of workers and safety risks.

[0070] The above embodiments should be understood as being used only to illustrate the present invention more clearly, and not to limit the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art fall within the scope defined by the appended claims.

Claims

1. A mechanized mining method of a multilayer veinous steeply inclined thin ore body, characterized in that, It comprises the following steps: S1, constructing a mechanized mining structure for multi-layered vein steeply inclined thin ore body; The mechanized mining structure for multi-layered vein steeply inclined thin ore body divides the underground ore body to be mined into several sections, arranges section transportation roadway along the ore body strike, arranges several through vein roadways penetrating the ore body perpendicularly to the ore body strike from the section transportation roadway, arranges a along-vein footwall roadway along the ore body strike from a through vein roadway, the two ends of the along-vein footwall roadway are communicated with the through vein roadway, arranges a out-of-vein ore mining roadway along the ore body footwall between two adjacent through vein roadways, the two ends of the out-of-vein ore mining roadway are communicated with the through vein roadway, the communication position is the ore mining position, arranges several ore mining accesses between the along-vein footwall roadway and the out-of-vein ore mining roadway, characterized in that, the two ends of the out-of-vein ore mining roadway close to the through vein roadway are respectively arranged with an ore mining auxiliary slope, an anti-turn chamber is arranged at a position close to any end of the through vein roadway of the out-of-vein ore mining roadway, the outlet of the anti-turn chamber is communicated with the opening of the ore mining access of the most end part on the same side; S2, starting the mining and ore falling in the stope, the ore falls into the along-vein footwall roadway; S3, the stope is arranged with a shovel-truck group as the ore mining equipment, the truck group enters any one of the through vein roadways at the two ends of the stope and stops at the ore mining position of the out-of-vein ore mining roadway to prepare for ore receiving; S4, the shovel enters the out-of-vein ore mining roadway and enters the ore mining access to load ore, the ore mining on the left and right sides of the central position is carried out in different ways: S4.a, on the same side as the oblique direction of the ore mining access, the shovel travels in the ore mining access to load ore, then reverses to turn into the out-of-vein ore mining roadway, then travels in the out-of-vein ore mining roadway to the ore mining position, uses the ore mining auxiliary slope to unload ore to the truck, after completing the unloading, enters the ore mining access again to start the next loading operation; S4.b, on the opposite side of the oblique direction of the ore mining access, the shovel travels in the ore mining access to load ore, then reverses to turn into the out-of-vein ore mining roadway, continues to reverse to the end of the anti-turn chamber, then travels to complete the turn, travels to the ore mining position, uses the ore mining auxiliary slope to unload ore to the truck, after completing the unloading, reverses into the anti-turn chamber, turns to the oblique direction of the ore mining access to drive out, enters the ore mining access to start the next loading operation; S5, calculates the ore mining frequency of the shovel in each access per day to ensure the uniform ore mining in each ore mining access and maintain the uniform subsidence of the ore heap surface in the stope; S6, after the stoping of the stope is completed, a large amount of ore is discharged; S7, uses the remote control shovel to recover the triangular ore heap in the along-vein footwall roadway to complete the whole ore mining work.

2. The method of mining according to claim 1, characterized in that, The distance between two adjacent through vein roadways is 100-200m.

3. The method of mining according to claim 1, wherein, The distance between the out-of-vein ore mining roadway and the along-vein footwall roadway is 8-12m.

4. The method of mining according to claim 1, wherein, The angle between the ore mining access and the out-of-vein ore mining roadway is 45°-70°, the distance between two adjacent ore mining accesses is 8-10m.

5. The method of mining according to claim 1, wherein, A rock pillar with a long axis direction perpendicular to the out-of-vein ore mining roadway is left between the anti-turn chamber and the adjacent through vein roadway, the size of the anti-turn chamber is larger than the size of the shovel.

6. The method of mining according to claim 1, wherein, The slope of the ore extraction auxiliary slope is controlled at 5-10%, and waste rock or wood board is used as cushion.

7. The method of mining according to claim 1, wherein, At the two ends of the along-vein bottoming roadway near the through-vein roadway, an end flexible partition wall is arranged, and is 2-3 m away from the nearest ore extraction route on the same side; the end flexible partition wall comprises a steel framework, a protective net and a flexible partition layer, the steel framework is inserted into the rock around the along-vein bottoming roadway and fixed; the protective net is bound on the steel framework and fixed in the along-vein bottoming roadway through hooks anchored in the rock of the roadway; the flexible partition layer is bound on the side of the protective net facing the stope.

8. The method of mining according to claim 7, characterized in that, The steel framework material is an I-shaped steel; the protective net is a steel mesh or a flexible net; and the flexible partition layer is a flexible material.

9. The method of mining according to claim 5, wherein, The difference between the length of the reverse chamber and the length of the scraper is greater than or equal to 0.6 m, the difference between the width is greater than or equal to 1.2 m, and the difference between the height is greater than or equal to 0.6 m.

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