Complete upward horizontal layering single-drift filling mining method for inclined thin ore body

Abstract

The invention relates to a complete new upward horizontal layering single-drift filling mining method for an inclined thin ore body. The method comprises the following steps: selecting the section size of a stoping drift; limiting an ore body inclination angle range; the ore body thickness range is limited; arranging a recovery access road; mining preparation cutting; ventilating the stope; and stoping and filling. According to the method, by optimizing the stoping route arrangement, limiting the constraint conditions and reasonably designing the mining procedures, the integrity mining of the conventional chambers and the corner ore bodies is achieved, the loss rate and the dilution rate of the ore bodies are remarkably reduced, the mining efficiency and the economic benefits are improved, and meanwhile the stability of the filling bodies is enhanced. The method has wide applicability and important popularization value, and provides important reference significance for integrity, safety and high-efficiency mining of similar mines.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of mining, and particularly relates to a complete new upward horizontal slicing single advance way filling mining method for inclined thin ore bodies. BACKGROUND

[0002] Inclined thin ore body mining is one of the difficulties in metal deposit mining, especially for valuable or high-grade inclined thin metal deposits, which usually adopts upward horizontal slicing advance way filling mining method. However, the existing technology has the following shortcomings: (1) The recovery way arrangement does not match the ore body occurrence conditions: when the upward horizontal slicing single advance way filling mining method is used to mine the inclined thin ore body, due to the difference of the ore body occurrence conditions, improper arrangement of the recovery way and selection of the way section size will lead to the difficulty in coordinating the dilution rate and loss rate, and it is difficult to meet the requirements of fine and complete mining. Taking a metal deposit with an ore body inclination of 50° and a thickness of 1 m as an example, the conventional recovery way arrangement is arranged from the upper side of the ore body, and the section size is 3 m wide by 3 m high (as shown in FIG. 1), which will cause the corner ore body to be left in the upper right corner of the ore room and lost, increasing the loss rate of the metal deposit mining. In order to reasonably recover the corner ore body, the recovery way section size is adjusted to 3.8 m wide by 3 m high (as shown in FIG. 2), which will increase the dilution rate and direct mining cost of the metal deposit mining, and even possibly increase the support cost. Figure 1 Figure 2

[0003] (2) The stability of the filling body: in the existing technology, the contact area between the filling body and the surrounding rock is limited, which is not conducive to the overall stability of the filling body in the mining area.

[0004] (3) Limitations of the mechanized long way filling mining method for steeply inclined thin and poor veins: this technology optimizes the mining and cutting engineering, uses long way filling to mine steeply inclined thin veins, and uses micro-cemented or non-cemented paste filling in the mined-out area. However, its application range is highly targeted, and for inclined thin ore bodies, the ore loss rate and dilution rate are not easy to control.

[0005] (4) Defects of the thin vein foam concrete slicing filling mining method: this technology is similar to the slicing filling of the short-hole shrinkage method, and personnel, materials and equipment components enter the stope through the manway. Its disadvantages are low recovery efficiency, poor internal ventilation effect of the stope, and difficult control of the ore loss rate and dilution rate.

[0006] In summary, the existing technology has the problems of unreasonable recovery way arrangement, insufficient stability of the filling body, and difficult control of the ore loss rate and dilution rate when mining inclined thin ore bodies, which makes it difficult to achieve safe, economic and efficient mining goals. Therefore, a new complete upward horizontal slicing single advance way filling mining method is urgently needed to solve the above technical problems. SUMMARY​​

[0007] The present application provides a new complete upward horizontal slicing single-entry filling mining method for inclined thin ore bodies, which changes the conventional arrangement direction of the recovery entry, arranges the stope from the lower side of the inclined thin ore body, and constructs the constraint relationship of the influencing factors such as the horizontal width of the corner ore body, the vertical thickness of the ore body, the ore body inclination, the entry height, and the entry width, to judge the applicable conditions for the mining of the inclined thin ore body. At the same time, the single-entry mining is divided into two process operations of conventional ore room forward mining and corner ore body reverse recovery mining, to control the loss rate and dilution rate of the ore body mining, realize the complete mining of the inclined thin ore body by using the upward horizontal slicing single-entry mining, and improve the overall stability of the filling body in the mining area.

[0008] The specific technical solution is: A new complete upward horizontal slicing single-entry filling mining method for inclined thin ore bodies, comprising the following steps: S1: Selecting the recovery entry section size: selecting the appropriate recovery entry section size according to the target mine rock stability; S2: Limiting the ore body inclination range: limiting the ore body inclination range by using the constraint condition of formula (3) according to the selected recovery entry section size; S3: Limiting the ore body thickness range: limiting the ore body thickness range that can be completely recovered by slicing single-entry under the premise of meeting steps S1 and S2, combined with the constraint conditions of formulas (1), (2), and (4); S4: Arranging the recovery entry: under the premise of meeting the constraint conditions of formulas (1)-(4), the recovery entry stope is arranged from the lower side in the vertical direction of the ore body to completely recover the conventional ore room and the corner ore body, and only one entry is arranged, while the corner ore body is left on the upper side of the ore body; Among them, the above formulas (1)-(4) are as follows: In order to meet the requirements of single-entry conditions, blasting, loading, stability of the upper side of the ore room, support, and other factors, when the inclined thin ore body is mined by using the complete upward horizontal slicing single-entry filling mining method, it is necessary to reserve appropriate size of the corner ore body, and it is necessary to constrain the quantitative relationship between the influencing factors such as the horizontal width of the corner ore body x, the vertical thickness of the ore body M, the ore body inclination α, the recovery entry height h, and the recovery entry width w, specifically, As shown in Figure 4 Through geometric analysis, it can be known that the horizontal width of the corner ore body x exists the following constraint condition: (1) In order to meet the requirements of blasting and loading and other factors, the horizontal width of the corner ore body exists the following constraint condition: x≤1.2m (2) In order to meet the requirement that the boundary ore body is triangular, the following constraint condition exists: (3) To meet the requirements of the stability of the hanging wall side ore room and support and other factors, the maximum height of the side corner ore body exists the following constraint conditions: (4) S5: Preparation and cutting: the preparation engineering such as stage along vein transportation roadway, through vein transportation roadway, preparation slope and sectional roadway is arranged in the stable rock layer of the footwall of the ore body, and the filling air return shaft is arranged near the contact line of the hanging wall of the ore body; the ore body is cut into multiple stoping access ore rooms by using the sublevel interconnection, and the blasting free surface is provided for the ore room mining and is used as the ore outlet interconnection.

[0009] S6: Stope ventilation: fresh air enters the sectional roadway and the sublevel interconnection through the preparation slope, and washes the stope head-on working face. In order to ensure good ventilation, the extraction type ventilation is adopted, and the local fan and the air cylinder are arranged to extract the dirty air of the head-on working face to the filling air return shaft 6, and then discharge to the surface.

[0010] S7: Stoping and filling: the horizontal short-hole drilling and blasting method is used to forwardly mine the access ore room, and when the mining reaches the designed length of the ore room, the filling operation is not performed, but the side corner ore body remaining in the upper part of the ore room is brushed and expanded in the direction of the mouth of the ore room along the head-on working face. The side corner ore body is mined by the short-hole drilling and blasting method, and the shovel truck is used to mine the ore. After the side corner ore body is mined, the filling operation of the entire ore room is performed. In this way, the forward drilling and blasting mining and the reverse brushing and expanding mining are used to realize the integrity mining of the conventional ore room and the side corner ore body.

[0011] Further, the specific steps of forwardly mining the access ore room in step S7 are as follows: the horizontal short-hole drilling and blasting is used to mine the ore along the mouth of the ore room to the end, and the ore after blasting is shovelled out by the shovel truck and transported to the stope ore chute (5) through the sublevel interconnection (7), and then transported to the main ore chute of the mine area through the stage along vein transportation roadway (1), and then lifted to the surface.

[0012] Further, the stoping of the side corner ore body in step S7 uses the short-hole blasting to mine the ore, and the blast hole direction is arranged along the inclined side of the triangular ore body, and the ore is gradually mined from the end of the conventional ore room to the mouth of the ore room.

[0013] The beneficial effects of the present application are as follows: the present application realizes the integrity mining of the conventional ore room and the side corner ore body by optimizing the stoping access arrangement, limiting the constraint conditions and reasonably designing the mining process, significantly reduces the loss rate and the dilution rate of the ore body, improves the mining efficiency and economic benefits, and enhances the stability of the filling body. The method has wide applicability and important popularization value, and provides an important reference for the integrity, safety and efficient mining of similar mines. The specific beneficial effects are as follows: (1) Achieving the integrity mining of conventional stope and corner ore body: By arranging the recovery drift from the lower side of the ore body, the corner ore body is left to the upper side of the ore body, and the forward drilling and blasting mining and reverse brushing and expanding retreat mining are used to achieve the integrity mining of conventional stope and corner ore body, avoiding the residue and loss of corner ore body in traditional method, effectively solving the problem of difficult coordination of ore loss rate and dilution rate caused by improper arrangement of recovery drift in the prior art, and significantly reducing the ore loss rate and dilution rate.

[0014] (2) Improving production capacity and economic benefits: By reasonably arranging the recovery drift and limiting the constraint conditions, the production capacity of the upward horizontal layer single drift filling mining method is improved, which can significantly reduce the direct mining cost and improve the ore recovery rate. In addition, in the process of forward drilling and blasting mining and reverse brushing and expanding retreat mining, two free surfaces are used for blasting, the blasting effect is good, the explosive consumption is small, and one blasting can reach 5m, which significantly improves the mining efficiency and economic benefits.

[0015] (3) Increasing the contact area of filling body and surrounding rock: After the recovery is completed, the conventional stope and corner ore body are filled at the same time, which can increase the contact area of the filling body and the surrounding rock on one side of the corner ore body, and is beneficial to improve the overall stability of the filling body. In addition, the corner ore body is located at the bottom, and the maximum height is not more than 1 / 3 of the height of the drift, which can realize complete filling and further enhance the stability of the filling body.

[0016] (4) Wide applicability: The present application comprehensively considers the quantitative relationship of single drift conditions, blasting, loading, upper side stope side slope stability and support and other factors, by limiting the constraint conditions of ore body inclination range, ore body thickness range and recovery drift section size, the applicable conditions of the mining method are clear, which provides an important reference for the safety and efficient mining of similar mines. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the existing recovery drift right corner corner ore body residue; Figure 2 It is a schematic diagram of the existing recovery drift right corner corner ore body residue; Figure 3 It is a schematic diagram of the existing recovery drift right corner corner ore body residue; Figure 4 It is a schematic diagram of the existing recovery drift right corner corner ore body residue; Figure 5 It is a schematic diagram of the existing recovery drift right corner corner ore body residue; Figure 6 It is a schematic diagram of the existing recovery drift right corner corner ore body residue; Figure 7Fig. 3 is a plan view of the complete upward horizontal slicing single entry filling mining method for the integrity; Figure 8 Fig. 4 is a side view of the blast hole arrangement for the corner ore body; Figure 9 Fig. 5 is a front view of the blast hole arrangement for the corner ore body; Figure 10 Fig. 6 is a schematic diagram of the middle brush extension and retreat mining filling; Figure 9 Fig. 7 is a schematic diagram of the middle brush extension and retreat mining filling; In the figure, 1 is a vein transportation roadway, 2 is a cross vein transportation roadway, 3 is a sublevel roadway, 4 is a mining preparation inclined ramp, 5 is an ore chute, 6 is a filling air return shaft, 7 is a sublevel communication roadway, 8 is a stoping entry ore room, 9 is an ore room end opening, 10 is a corner ore body, 11 is an upper wall rock, 12 is a lower wall rock, 13 is a filling body, 14 is a middle section safety pillar, 15 is an ore body, 16 is a contact zone between the corner ore body and the ore room end opening, and 17 is a blast hole. DETAILED DESCRIPTION

[0018] In order to make the technical problems and technical solutions solved by the present application clearer, 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 do not limit the present application. Example 1

[0019] A complete upward horizontal slicing single entry filling mining method for inclined thin ore bodies is as follows: S1: Selecting the stoping entry section size: according to the target mine ore rock stability, selecting the appropriate stoping entry section size; as shown in the figure, the stoping entry section size is 3m wide by 3m high for illustration. Figure 3 S2: Limiting the ore body inclination range: according to the selected stoping entry section size, using the constraint condition of formula (3), when w=h=3m, the value range of the ore body inclination α is calculated as [45°, 90°], and the ore body inclination α=50° is selected for illustration.

[0020] S3: Limiting the ore body thickness range: under the premise of w=h=3m and α=50°, combining the constraint conditions of formulas (1), (2) and (4), the maximum thickness of the single entry slicing that can be completely mined is calculated as 1.01m.

[0021] The complete slicing single entry filling mining method refers to arranging only one stoping entry stope along the strike to realize the complete mining of the conventional ore room and the corner ore body of the thin ore body. It needs to meet the requirements of single entry condition, blasting, loading, upper wall side ore room side slope stability and support, etc., and has specific application conditions in actual application.

[0022] The complete slicing single entry filling mining method refers to arranging only one stoping entry stope along the strike to realize the complete mining of the conventional ore room and the corner ore body of the thin ore body. It needs to meet the requirements of single entry condition, blasting, loading, upper wall side ore room side slope stability and support, etc., and has specific application conditions in actual application.

[0023] The thickness of the ore body is related to the size of the recovery access section and the dip angle of the ore body. The calculation and comparison using constraint conditions (1) to (4) show that: 1) When the size of the recovery access section is 3m wide by 3m high, the maximum thickness of the ore body that can be completely recovered by the single-layer single-access method is 0.7m, 1.01m, 1.31m, and 2.61m when the dip angle of the ore body is 45°, 50°, 55°, and 80°, respectively. Therefore, the maximum thickness of the ore body that can be completely recovered by the single-layer single-access method increases with the increase of the dip angle of the ore body.

[0024] 2) When the dip angle of the ore body is 50°, the maximum thickness of the ore body that can be completely recovered by the single-layer single-access method is 1.01m and 1.35m when the size of the recovery access section is 3m wide by 3m high and 4m wide by 4m high, respectively. Therefore, the maximum thickness of the ore body that can be completely recovered by the single-layer single-access method increases with the increase of the size of the recovery access section.

[0025] According to the above comparison, for a certain mine, the dip angle and thickness of the ore body generally vary greatly. When the size of the recovery access section recommended based on the stability of the ore and rock is a range value, the dip angle of the ore body is first used to determine the height of the recovery access section based on constraint conditions (2) and (4), then the size of the recovery access section is determined based on constraint condition (3), and finally the maximum vertical thickness of the ore body suitable for the present application is determined based on constraint condition (1), thereby determining the exploitable area of the present complete single-layer single-access filling mining method.

[0026] S4: Arranging the recovery access Under the premise of meeting the constraint conditions of equations (1) to (4), the ore body suitable for the present complete upward horizontal single-layer single-access filling mining method is as follows: the size of the recovery access section is 3m wide by 3m high, the dip angle of the ore body is 50°, and the vertical thickness of the ore body is 1m. For thin ore bodies, the recovery access stope is mined along the strike direction. To completely recover conventional ore rooms and corner ore bodies, the recovery access stope is arranged from the footwall side in the vertical direction of the ore body strike, and only one access is arranged.

[0027] S5: Preparation and cutting The preparation engineering stages, such as the along-vein transportation roadway 1, the through-vein transportation roadway 3, the preparation inclined ramp 4, and the sublevel roadway 3, are arranged in the stable rock layer of the ore body footwall, and the filling air return shaft 6 is arranged near the contact line of the ore body hanging wall. The ore body is cut into multiple recovery access ore rooms 8 by the sublevel communication passage 7, and the blasting free face for ore room mining and the ore outlet communication passage are provided.

[0028] S6: Stope ventilation Fresh air flows through the mining slope 4 into the sublevel drift 3 and the sublevel connection 7, and washes the stope head face. In order to ensure good ventilation, the extraction type ventilation is adopted, and the local fan and the air duct are arranged to send the dirty air of the head face to the filling return air shaft 6, and then to the surface.

[0029] S7: Stoping and filling The horizontal short-hole drilling and blasting method is used to forwardly mine the drift room, and when the mining reaches the designed length of the drift room, the filling operation is not performed, but the edge and corner ore bodies remaining in the upper disc of the end head face are brushed and expanded in the direction of the mouth of the drift room. The edge and corner ore bodies are dropped by the short-hole drilling and blasting method, and the ore is mined by the shovel truck. After the edge and corner ore body is mined, the filling operation of the entire drift room is performed. In this way, the forward drilling and blasting mining and the reverse brushing and expanding mining are used to realize the integrity mining of the conventional drift room and the edge and corner ore body.

[0030] After the edge and corner ore body is brushed and expanded, the filling operation is performed, which can realize the single drift filling slurry ratio without changing the original design, and the edge and corner ore body is located at the bottom, and the maximum height does not exceed 1 / 3 of the height of the drift, which can realize complete filling. In addition, the conventional drift room and the edge and corner ore body are filled at the same time, which increases the contact area of the filling body on one side of the edge and corner ore body and the surrounding rock, which is beneficial to improve the overall stability of the filling body.

[0031] After the edge and corner ore body is brushed and expanded, the filling operation is performed, which can realize the single drift filling slurry ratio without changing the original design, and the edge and corner ore body is located at the bottom, and the maximum height does not exceed 1 / 3 of the height of the drift, which can realize complete filling. In addition, the conventional drift room and the edge and corner ore body are filled at the same time, which increases the contact area of the filling body on one side of the edge and corner ore body and the surrounding rock, which is beneficial to improve the overall stability of the filling body.

[0032] Specifically, 1) Conventional drift room forward mining: forward mining along the mouth to the end of the drift room, and the ore after blasting is shovelled out by the shovel truck, transported to the stope ore chute shaft 5 through the sublevel connection 7, then transported to the main chute shaft of the mining area through the stage vein transportation roadway 1, and then lifted to the surface, and finally transported to the ore dressing plant.

[0033] Among them, Ore dropping: shallow hole drilling and blasting is adopted; Ore mining: the ore dropped by blasting is shovelled by the shovel truck, transported to the stope ore chute shaft 5 through the sublevel connection 7, then transported to the main chute shaft of the mining area through the stage vein transportation roadway 1, and then lifted to the surface.

[0034] Ventilation: fresh air flows through the mining slope 4 into the sublevel drift 3 and the sublevel connection 7, and washes the stope head face. When the air is returned, the extraction type ventilation is adopted, and the local fan and the air duct are arranged to send the dirty air of the head face to the filling return air shaft 6, and then to the surface.

[0035] 2) Corner ore body brush expansion retreat mining: the conventional ore room is mined from the ore room opening to the end opening, and the corner ore body remaining on the hanging wall side is recovered by reverse brush expansion retreat mining. The ore drawing and ventilation are consistent with the conventional ore room forward mining, and the ore drawing is different, mainly in: Ore drawing: the stripping of the corner ore body is carried out by using shallow hole blasting, and the blast hole direction is arranged along the inclined side of the triangular ore body, and the ore drawing is gradually retreated from the end opening of the conventional ore room to the ore room opening.

[0036] 3) Ore room filling: after the conventional ore room and the corner ore body are mined, filling operation is carried out. The ore room filling adopts cemented filling, a partition wall is selected and arranged to close the ore room of the mining access. The corresponding proportioned cemented filling slurry is transported to the ore room by pipeline, and the pipeline is arranged from the surface to the filling return air shaft, and then arranged into the interior of the ore room from the filling return air shaft.

[0037] 4) Safety guarantee measures In order to protect the stability of the surrounding rock of the conventional ore room during the mining of the corner ore body, the maximum height of the corner ore body should not exceed 1 / 3 of the height of the conventional ore room. Example 2

[0038] Taking a certain inclined thin ore body in a gold mine in Yunnan as an example, the maximum vertical thickness is 1m, the average inclination is 50°, the average grade is 5g / t, and the ore rock is relatively stable. The upward horizontal stratified single access filling mining method is designed to mine.

[0039] If the existing mining access is arranged from the hanging wall side, there is a problem of losing part of the lower corner ore body. Therefore, the complete upward horizontal stratified single access filling mining method for inclined thin ore body provided by the present application is adopted, and the specific implementation steps are as follows: S1: Selecting the cross section size of the mining access The ore rock of the mine is relatively stable, but the vertical thickness of the ore body is only 1m. In order to ensure mechanized mining and control the dilution rate, the cross section size of the mining access is designed to be 3m wide and 3m high. At this time, the stratified height is 3m, the segmented height is 15m, and the middle section height is 60m.

[0040] S2: Limiting the range of ore body inclination According to the selected cross section size of the mining access, using the constraint condition of formula (3), when w=h=3m, it can be known that the value range of the ore body inclination a is [45°, 90°]. The average inclination a of the ore body of a certain gold mine in Yunnan is 50°, which is within the value range, and the complete upward horizontal stratified single access filling mining method of the present application can be used for mining.

[0041] S3: Limiting the range of ore body thickness Given w=h=3m and α=50°, and combining the constraints of equations (1), (2) and (4), the maximum thickness of the ore body that can be intactly mined using a single-path layered method can be calculated to be 1.01m. The maximum vertical thickness (1m) of the ore body in a gold mine in Yunnan is less than this calculated value, and the intact upward horizontal layered single-path filling mining method of this invention can be used for mining.

[0042] S4: Determine the mining approach route Under the premise of satisfying the constraints of equations (1) to (4), the ore body occurrence conditions applicable to the integrity-upward horizontal layered single-entry filling mining method are as follows: the cross-sectional dimensions of the mining access are 3m wide × 3m high, the dip angle of the ore body is 50°, and the maximum vertical thickness of the ore body is 1m. For example Figure 7 Figure 8 As shown, for complete mining of conventional stops and corner ore bodies, only one mining access stop 8 needs to be arranged. The mining access stop 8 is arranged from the footwall in the direction perpendicular to the strike of the ore body, and the corner ore body 10 remains on the hanging wall of the ore body.

[0043] S5: Precision Cutting like Figures 5-7 As shown, the preparatory works, including the stage-along-vein transport roadway 1, the cross-vein transport roadway 2, the preparatory ramp 4, the segmented roadway 3, and the ore pass 5, are arranged in the stable rock strata of the footwall of the ore body. The backfill air shaft 6 is located near the contact line of the hanging wall of the ore body. The ore body is cut into multiple mining access stops 8 using the layered connecting roadway 7, which also provides blasting free faces and mining connection roads for stop mining.

[0044] S6: Mining area ventilation Fresh air flows through the pre-mining ramp 4 into the section roadway 3 and the layered connecting roadway 7, washing the working face of the stope. To ensure good ventilation, an exhaust ventilation system is used, with local fans and ventilation ducts installed to draw the stale air from the working face of the stope 8 in the return mining roadway to the backfill return air shaft 6, and then discharge it to the surface.

[0045] S7: Mining and Backfilling like Figure 7 As shown, using a Boomer 281 drilling rig, the horizontal shallow-hole drilling and blasting method is employed for forward mining of the stope 8. During ore extraction, a JW-2D loader is used to load the blasted ore, which is then transported via the layered connecting roadway 7 to the ore pass 5 in the stope, and then via the staged along-vein transport roadway 1 to the main pass in the mining area, and finally hoisted to the surface. When forward mining reaches the end of the stope 9, backfilling is not carried out. At this time, along the working face of the end of the stope 9 towards the stope opening, the remaining corner ore body 10 in the hanging wall is excavated and expanded. The corner ore body 10 is drilled using a pneumatic rock drill, and the ore is extracted using the shallow-hole drilling and blasting method, with the ore extraction method consistent with that of a conventional stope. After the corner ore body 10 is extracted, all stope mining work is completed.

[0046] It should be noted that, in the process of recovery, as shown in Figures 9-10 The free face of the corner ore body 10 is formed near the side of the ore room, and the drilling face is also provided. When the corner ore body 10 is expanded, the corner ore body is blasted with the contact zone 16 of the end of the ore room, and the two free faces exist when the corner ore body 10 is blasted by using the short-hole drilling, the blasting effect is good, and the unit consumption of explosives is small. The actual blasting can reach 5m, the opening position of the blast hole is located at the midpoint of the right-angle side of the corner ore body 10 near the side of the ore room, which is parallel to the inclined side of the triangular corner ore body, the diameter of the blast hole 17 is 43mm, and the interval is 2m.

[0047] Filling: as shown in Figure 8 After the recovery of the recovery entry ore room 8 and the corner ore body 10, the whole filling operation is carried out. At this time, the filling does not need to change the original design of the single-entry cemented filling slurry ratio (the sand-cement ratio is 1:8), and the strength of the filling can reach 2MPa after curing for 7 days. In addition, from the next layer of the recovery entry ore room 8, the filling body 13 can be seen: ① the bottom corner of the upper disc side of the entry ore room will show a certain expansion trace; ② the conventional ore room and the corner ore body are filled at the same time, which increases the contact area of the filling body on one side of the corner ore body and the surrounding rock, which is beneficial to improve the overall stability of the filling body.

[0048] The present application is described in detail through specific and preferred embodiments, but those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and any modification, equivalent replacement, etc. within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A complete new upward horizontal slicing single pass fill mining method of inclined thin ore bodies, characterized in that, The method comprises the following steps: S1: selecting the size of the stoping drift section: selecting the appropriate size of the stoping drift section according to the target mine rock stability; S2: limiting the range of the ore body dip angle: limiting the ore body dip angle according to the selected size of the stoping drift section by using the constraint condition of formula (3); S3: limiting the range of the ore body thickness: under the premise of meeting steps S1 and S2, the thickness of the ore body that can be completely recovered by the single drift is limited by combining the constraint conditions of formulas (1), (2) and (4); S4: arranging the stoping drift: under the premise of meeting the constraint conditions of formulas (1)-(4), the stoping drift is arranged from the lower side to the upper side in the vertical direction of the ore body, and only one drift is arranged for the complete recovery of the conventional ore room and the corner ore body, and the corner ore body is left on the upper side of the ore body; S5: stoping and filling: first, the ore room is mined in the forward direction, and when the designed length of the ore room is reached, the filling operation is not performed, but the corner ore body on the upper side is expanded and mined towards the ore room opening; after the corner ore body is mined, the filling operation of the entire ore room is performed; Wherein, the above formulas (1)-(4) are as follows: In order to meet the single drift condition, blasting, loading, stability of the side slope of the upper side of the ore room and support requirements, when the inclined thin ore body is mined by the complete upward horizontal single drift filling mining method, it is necessary to reserve appropriate size of the corner ore body, and it is necessary to constrain the quantitative relationship between the influencing factors such as the horizontal width x of the corner ore body, the vertical thickness M of the ore body, the ore body dip angle α, the stoping drift height h and the stoping drift width w, and specifically, The horizontal width x of the corner ore body is subject to the following constraint condition: （1） x≤1.2m (2) In order to meet the triangular shape of the boundary ore body, the following constraint condition exists: （3） In order to meet the requirements of the stability of the side slope of the upper side of the ore room and support, the maximum height of the corner ore body exists the following constraint condition: （4）。 2. A complete new on- level slicing single pass cut and fill mining method for inclined thin ore bodies according to claim 1, characterized in that, The specific steps of the forward mining of the ore room in step S5 are as follows: the ore is blasted by horizontal shallow hole drilling from the ore room opening to the end, and then the blasted ore is shovelled out by the shovel truck and transported to the mine ore chute (5) through the layered communication passage (7), and then transported to the main chute of the mine area through the stage along the vein transportation roadway (1), and then lifted to the ground.

3. A complete new rise horizontal slicing single pass fill stoping method of inclined thin ore bodies according to claim 1 or 2, characterized in that, The stoping of the corner ore body in step S5 uses shallow hole blasting to fall the ore, and the blast hole direction is arranged along the inclined side of the triangular ore body, and the ore is gradually mined from the end of the conventional ore room to the ore room opening.

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