A continuous mechanized mining method for mining, supporting and transporting
Through the combination of anchor excavation machine, mining combined tape machine and single hydraulic support, continuous transportation and synchronous support of ore from the mining surface to the surface is achieved, and the limited production capacity of mining in traditional mining methods is solved. The problem of this paper improves the production efficiency and safety of the mining site.
Patent Information
- Application Number
- CN202210369527.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-04-08
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2042-04-08
AI Technical Summary
The traditional drilling and blasting mining method cannot be carried out simultaneously and parallel when operating in the same space, resulting in limited production capacity of the mining site, low labor efficiency, high production costs, and insufficient mining output and transportation efficiency of existing cantilever comprehensive excavators, which cannot be achieved. Continuous operations of mine landing, mining outage, support and transportation limit the production capacity of the mining site.
The anchor excavation machine, mining field combination tape machine and transporter are used to concentrate the mines through the vein shafts, and the tape machine in the middle section is continuously transported to realize the assembly line continuous operation of the ore from the mining surface to the surface, and through the single hydraulic support column. Carry out synchronous parallel automated support, simplify anchor network process, and reduce support costs.
The assembly line continuous operation of ore mining has been realized, which has improved mining efficiency and safety guarantees, reduced mining faces, saved production costs, reduced labor intensity and number of personnel, and improved the operating environment.
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Figure CN114837664B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of mining, and in particular to a slow-mining and branch-transportation continuous mechanized mining method. Background Art
[0002] Traditional drilling and blasting mining mainly includes processes such as rock drilling, blasting, ventilation, support, mining, and filling. When operating in the same space, it is necessary to follow a chronological order and cannot be carried out simultaneously and in parallel, resulting in limited production capacity of the mining site. A large number of working faces need to be equipped with a large number of workers and equipment. The mining and cutting workload is large, the production cost is high, and the labor efficiency is low, which seriously restricts the high-quality development of mining enterprises.
[0003] In order to solve the above problems, in recent years, mining science and technology workers have tried to introduce coal production technology and use cantilever tunneling machines to recover metal and non-metallic deposits, triggering a new round of mining technology changes.
[0004] The cantilevered excavator can directly cut and drop ore of a certain hardness, realize non-explosive continuous mining, and has a high level of mechanization, which greatly improves the efficiency of dropping ore. The currently disclosed mining method based on the cantilevered excavator is mainly used for thin ore bodies or medium-thick ore bodies. The mining is carried out with a scraper or a trackless vehicle. After a certain advance, the excavator needs to be withdrawn to facilitate the entry of the anchor net trolley to support the top of the working face, or concentrated support can be carried out after 10 to 15 meters of excavation.
[0005] From the public data and field practice, the efficiency of excavation and ore dropping by multi-purpose tunnel boring machines is high, but the production capacity and continuity of ore discharge and transportation equipment are insufficient. For example, the thin ore body mining method based on remote intelligent tunnel boring machines disclosed in the existing patent publication number CN113803071A uses trackless mining trucks to discharge ore, with low efficiency, delayed support, and no guarantee of safety. Moreover, continuous operation of ore discharge, ore discharge, support, and transportation cannot be achieved, and the production capacity of the mine is still restricted. The high efficiency of the multi-purpose tunnel boring machine cannot be fully released, and its advantages cannot be fully demonstrated.
[0006] In addition, for the professional terms mentioned in this document, those skilled in the art generally identify them as follows:
[0007] Ore body strike: the direction of the intersection of the ore body layer and the horizontal plane. Summary of the invention
[0008] The purpose of the present invention is to provide a continuous mechanized mining method for mining, branching and transportation, optimize the mining method and improve the mining efficiency.
[0009] The mining system provided by the present invention comprises the following steps:
[0010] Step 1, ore body division:
[0011] Step 1.1, dividing the ore body into several middle sections according to the occurrence of the ore body, dividing the middle section into several subsections, setting multiple layers in the subsection, dividing the layers into several pan areas along the ore body strike, and arranging at least two stopes in the pan areas along the ore body strike;
[0012] Step 1.2, each middle section is arranged along the strike of the ore body; a vein chute is arranged along the ore-rock boundary line of the lower plate of the ore body and in the center of the plate area, the bottom of the chute is connected with the middle section transport tunnel through the middle section plate area connecting road, and a middle section tunnel belt conveyor is arranged in the middle section transport tunnel at this location, and the middle section tunnel belt conveyor is connected with the bottom of the chute through the middle section connecting belt conveyor;
[0013] Step 2, arranging a cutting tunnel and a stope belt conveyor tunnel in the stope: the cutting tunnel is arranged along the end of one side of the stope perpendicular to the direction of the ore body, and the stope belt conveyor tunnel is arranged along the direction of the ore body at the boundary line of the ore and rock in the hanging wall vein;
[0014] Step 3, Mining Equipment Arrangement:
[0015] Step 3.1, arranging a stope conveying belt conveyor and an end transfer belt conveyor: the stope conveying belt conveyor is arranged in the stope belt conveyor lane, the end transfer belt conveyor is arranged in the cutting level lane, and one end of the end transfer belt conveyor is vertically connected to the stope conveying belt conveyor, and the other end of the end transfer belt conveyor is connected to the chute;
[0016] Step 3.2, the integrated digging and anchoring machine and the accompanying movable belt conveyor enter the mining area: the integrated digging and anchoring machine faces the mining surface, and the integrated digging and anchoring machine and the mining area conveying belt conveyor can be moved forward together along the mining area conveying belt conveyor;
[0017] Step 4, mining and mining:
[0018] Step 4.1, the mined ore is transported by the integrated mining and anchoring machine to the accompanying movable belt conveyor, and then transported to the stope transport belt conveyor. The stope transport belt conveyor transports the ore to the end transfer belt conveyor and unloads it into the chute;
[0019] Step 4.2: The ore is lowered through the chute to the middle section connecting belt conveyor, then transferred to the middle section main tunnel belt conveyor and transported to the main chute to be lifted to the surface.
[0020] In the above method, key equipment such as ore dropping and transporting, such as integrated digging and anchoring machines, combined belt conveyors in the mining area and conveyors, are used. The ore is discharged in a centralized manner through the chute, and the belt conveyor in the middle section of the tunnel is used for continuous transportation. The whole process from dropping ore at the mining face to lifting it to the surface is carried out in an uninterrupted mechanized production, truly realizing the continuous operation of ore mining in an assembly line manner, and greatly improving the mining efficiency by improving the ore discharge efficiency.
[0021] In the specific technical solution, in step 1, the ore body has an inclination angle of 40° to 90°, and the ore body thickness is 5m to 15m. The middle section height is 50 to 200m, the segment height is 12 to 20m, the layer height is 3 to 5m, and the panel length is 100 to 300m; two stopes are arranged in each panel along the strike direction, with a stope length of 50 to 150m, a width equal to the ore body thickness, and a chute diameter of 2 to 3m.
[0022] The cutting level tunnel has a height of 3 to 5 m and a width of 3 to 5 m. The belt conveyor tunnel in the mining area has a height of 3 to 5 m and a width of 3 to 5 m. The length is from one side of the mining area to the other end, that is, 50 to 150 m.
[0023] To achieve effective support, during step 4, a single hydraulic prop is required to support the roof of the goaf, and an anchor net is set up in the roof of the goaf.
[0024] Preferably, the single hydraulic prop is arranged in array in the goaf; the distance between the single hydraulic prop near the side of the lower wall of the mining area and the side wall is greater than or equal to 4m. This not only stabilizes the support structure, but also facilitates the integrated anchor miner and the accompanying movable belt conveyor to withdraw from the mining area in a timely manner.
[0025] The ore dropping and support are carried out synchronously and in parallel with automated operations. When the stability of the mine roof is good, the anchoring net process can be simplified and the support cost can be reduced.
[0026] Preferably, a support pad is provided on the top of the single hydraulic support to strengthen the supporting effect on the roof of the goaf.
[0027] Preferably, the continuous mechanized mining method for mining, supporting and transporting further comprises step 5: after the mining of the stope is completed, the integrated digging and anchoring machine, the accompanying movable belt conveyor, the stope transport belt conveyor and the end transport belt conveyor are removed; the single hydraulic prop is withdrawn in a backward withdrawal sequence. The withdrawal in a backward withdrawal sequence is adopted to achieve safer mining operations.
[0028] Preferably, the continuous mechanized mining method for mining, supporting and transporting further includes step 6, wherein a filling retaining wall is constructed after all the single hydraulic props are withdrawn to seal the goaf; and a filling pipeline enters the goaf through a return air filling shaft.
[0029] Preferably, the bottom of the accompanying movable belt conveyor is a rubber wheel travel mechanism connected to the mine conveyor belt conveyor. The rubber wheel travel mechanism is at an angle of 30 to 90 degrees to the mine conveyor belt conveyor. This is conducive to the accompanying movable belt conveyor and the mining and anchoring integrated machine to dig together with the mine conveyor belt conveyor, ensuring the output of the falling ore while mining, and operating at the same time to achieve continuous mining.
[0030] Preferably, step 1 also includes: arranging a segmented tunnel in each segment along the direction of the ore body, the middle section transport tunnel is connected with the segmented tunnel through a segmented connecting road, and the segmented connecting road is connected with the mining area through a layered connecting road.
[0031] Preferably, the continuous mechanized mining method for mining, branching and transportation further comprises step 7, transferring to the adjacent side stope: repeating steps 2 to 6 until the stratified mining of the panel area is completed;
[0032] From the bottom plate of the mining area to the top plate height, a chute protection ring is built above the chute using prefabricated concrete rings or bricks. The protection ring is consistent with the diameter of the chute and has a thickness of 100 to 200 mm.
[0033] Compared with the related technologies, the beneficial effects of the present invention are as follows: by adopting key equipment for ore dropping, transportation and support such as an all-in-one digging and anchoring machine, a combined belt conveyor in the mining area, a conveyor and a single hydraulic support, the ore is discharged from the vein chute in a centralized manner, and the long belt conveyor in the middle transport tunnel is used for continuous transportation. The whole process from dropping ore at the mining face to lifting it to the surface is uninterruptedly mechanized, truly realizing continuous operation of ore mining in an assembly line manner, greatly improving mining efficiency and safety assurance level, reducing mining faces, saving production costs, reducing labor intensity, reducing operating personnel, and improving the working environment. It is a low-carbon, green, safe and efficient mining method. BRIEF DESCRIPTION OF THE DRAWINGS
[0034] Figure 1 The schematic diagram of the layout structure of the mining system provided by the present invention (i.e., along the Figure 4 AA cross-sectional view of FIG.
[0035] Figure 2 For along Figure 1 BB cross-sectional view;
[0036] Figure 3 For along Figure 1 Schematic diagram of CC cross-section;
[0037] Figure 4 For along Figure 1 DD cross-sectional diagram;
[0038] Figure 5 This is a schematic diagram of the arrangement structure of a single hydraulic support of the present invention;
[0039] Figure 6 It is a longitudinal cross-sectional view of the distribution of the mechanized equipment of the present invention.
[0040] In the attached figure: 1. Middle section transport tunnel; 2. Middle section panel area connecting road; 3. Segmented tunnel; 4. Segmented connecting road; 5. Layered connecting road; 6. Ramp; 7. Chute; 8. Return air filling skylight; 9. Cutting level tunnel; 10. Mining field belt conveyor tunnel; 11. Top pillar; 12. Filling area; 13. Middle section connecting belt conveyor; 14. Middle section tunnel belt conveyor; 15. Excavation and anchoring integrated machine; 16. Accompanying movable belt conveyor; 17. Mining field transport belt conveyor; 18. End transfer belt conveyor; 19. Single hydraulic support; 20. Support pad; 21. Anchor net. DETAILED DESCRIPTION
[0041] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear in the following, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.
[0042] In this embodiment, the production scale of a lead-zinc mine is 2000t / d, the average thickness of the ore body is 12m, the average inclination is 65°, and the uniaxial compressive strength of the ore body is 40-90MPa. The original mining method is a mechanized upward approach filling method, the stope production capacity is 200-250t / / d, the number of stopes that need to be mined at the same time is 8-10, the number of stopes for standby mining is 2-3, the mining labor quota is 150 people, the stope depletion rate is 12%, and the loss rate is 8%. In order to meet the production capacity requirements, 2-3 middle sections are mined at the same time, the polluted air flows in series, the air volume is large, and the fan energy consumption is high.
[0043] In order to further improve the production efficiency of the mining site, simplify the process flow, reduce labor intensity and loss indicators, and reduce labor quotas, it is proposed to adopt a continuous mechanized mining method for mining, support and transportation.
[0044] like Figure 1 As shown, the present invention provides a continuous mechanized mining method for mining, supporting and transporting, which mainly includes the following steps:
[0045] Step S1, ore body division:
[0046] Step S1.1, according to the occurrence of the ore body, the ore body is divided into 12 middle sections from top to bottom, with a middle section height of 60m. The middle section is divided into 4 subsections, with a subsection height of 14m. Each subsection is set up with 3 to 4 layers, with a layer height of 4m. The layers are divided into 10 panels along the direction of the ore body, with a panel width of 160m. Two stopes are arranged in the panel along the direction of the ore body, with a stope length of 80m. Figure 1 As shown, the top column 11, the top column thickness is 3m, and no space is left between the plates (such as Figure 4 shown).
[0047] Step S1.2: each middle section is arranged along the ore body direction, and each segment is arranged along the ore body direction, and a segmented laneway 3 (such as Figure 2 The vein chute 7 is arranged along the ore-rock boundary line of the lower plate of the ore body and in the center of the plate area (as shown in FIG. Figure 1 , Figure 2 As shown), the chute diameter is 2.5m, shared by the left and right sides of the stope (as shown Figure 1 The middle section transport tunnel 1 is connected to the segment tunnel 3 through the segment connecting road 4. The middle section transport tunnel 1 is provided with a ramp 6 (as shown in FIG. Figure 4 As shown in Figure 3 As shown, the bottom of the chute 7 is connected to the middle transport tunnel 1 through the middle panel area connecting road 2, and a middle tunnel belt conveyor 14 is set in the middle transport tunnel 1. The middle tunnel belt conveyor 14 is connected to the bottom of the chute 7 through the middle connecting belt conveyor 13, and the middle connecting belt conveyor 13 is set in the middle panel area connecting road 2. Figure 4 As shown, the segmented connecting road 4 is connected to the mining area through a layered connecting road 5, and the layered connecting road 5 is arranged in the center of the panel area.
[0048] Step S2, arranging the cutting level tunnel 9 and the belt conveyor tunnel 10 in the stope: Figure 2 As shown, the cutting level tunnel 9 is arranged along the end of one side of the stope, perpendicular to the ore body, with a height of 4m and a width of 4m. The stope belt conveyor tunnel 10 is arranged along the ore body at the boundary line of the ore rock in the upper wall vein, and the stope belt conveyor tunnel 10 is kept straight as much as possible, with a height of 4m, a width of 4m, and a length from one side of the stope to the other side, that is, 80m.
[0049] In areas where the uniaxial compressive strength of the ore body is 40 to 60 MPa, the downward layered mining process is adopted, and operations are carried out under the artificial roof of the filling body to ensure safety; in areas where the uniaxial compressive strength of the ore body is 60 to 90 MPa, the upward layered mining process is adopted.
[0050] Step S3, mining equipment layout (such as Figure 2 , Figure 6 shown):
[0051] Step S3.1, arrange the mining field conveyor belt conveyor 17 and the end transfer belt conveyor 18: the mining field conveyor belt conveyor 17 is arranged in the mining field conveyor belt conveyor tunnel 10, the end transfer belt conveyor 18 is arranged in the cutting level tunnel 9, and one end of the end transfer belt conveyor 18 is vertically connected to the mining field conveyor belt conveyor 17, and the other end of the end transfer belt conveyor 18 is connected to the chute 7.
[0052] Step S3.2, the integrated miner and anchor machine 15 and the accompanying movable belt conveyor 16 enter the mining area: the integrated miner and anchor machine 15 faces the mining surface, and the tail is connected to the accompanying movable belt conveyor 16. The bottom of the accompanying movable belt conveyor 16 is a rubber wheel walking mechanism, which is at a 90° angle to the mining area belt conveyor tunnel 10. The integrated miner and anchor machine 15 and the mining area transport belt conveyor 17 can be pushed forward together along the mining area transport belt conveyor 17.
[0053] Step S4, mining and mining:
[0054] Step S4.1, the mined ore is transported by the integrated mining and anchoring machine 15 to the accompanying movable belt conveyor 16, and then transported to the stope transport belt conveyor 17. The stope transport belt conveyor 17 transports the ore to the end transfer belt conveyor 18 and unloads it into the chute (such as Figure 2 shown).
[0055] Step S4.2, the ore is vibrated and discharged from the bottom of the chute 7 and evenly lowered to the middle section connecting belt conveyor 13, and then transferred to the middle section main roadway belt conveyor 14 and transported to the main chute to be lifted to the surface concentrator. The height difference between the front and rear of each combined belt conveyor is 300-500mm, which meets the continuous transportation of ore.
[0056] Step S4.3, such as Figure 6 As shown, a single hydraulic prop 19 is used to support the roof of the goaf, and an anchor net 21 is set in the roof of the goaf. In this way, when the stability of the roof of the goaf is good, the anchor net process can be simplified and the support cost can be reduced.
[0057] like Figure 6 As shown, multiple single hydraulic props 19 are arranged in an array in the goaf. As the integrated mining and anchoring machine 15 advances, the single hydraulic props 19 are arranged at the same time according to the increase in the goaf space. Figure 5 As shown, the spacing between multiple single hydraulic props 19 is 2 to 5 meters. The distance between the single hydraulic prop 19 near the side of the lower wall of the mining area and the wall is greater than or equal to 4 meters, which is convenient for the integrated digging and anchoring machine 15 and the accompanying movable belt conveyor 16 to withdraw from the mining area in time.
[0058] like Figure 6 As shown, a support pad 20 is provided on the top of the single hydraulic support 19. The support pad 20 is made of steel plate in a square shape with a side length of 300 mm to enhance the supporting effect on the roof of the goaf.
[0059] Step S5, after the mining is finished, the anchoring machine 15, the accompanying movable belt conveyor 16, the mining field transport belt conveyor 17 and the end transport belt conveyor 18 are removed. The single hydraulic prop 19 is withdrawn in a backward withdrawal sequence, as shown in the following example. Figure 2 As shown, withdraw first Figure 2The single hydraulic props 19 in a row on the right side are shown, and then are withdrawn row by row to the left in sequence until the single hydraulic props 19 on the leftmost side are withdrawn.
[0060] Step 6: After all the single hydraulic props 19 are removed, a filling retaining wall is constructed to seal the goaf. The filling pipeline enters the goaf from the return air filling well 8, fills the goaf and forms a filling area 12 (such as Figure 1 shown).
[0061] When upward stratified mining is adopted, the uniaxial compressive strength of the filling body of the upper 1.0-1.5m of the stope shall not be less than 2.0MPa in 28 days, and the uniaxial compressive strength of the filling body of the rest of the stope shall not be less than 1.0Mpa in 28 days. When downward mining is adopted, the uniaxial compressive strength of the filling body of the bottom 1.0-1.5m of the stope shall not be less than 4.0MPa in 28 days, and the uniaxial compressive strength of the filling body of the rest of the upper part shall not be less than 2.0MPa in 28 days, and the bottom shall be anchored to the upper and lower surrounding rocks with steel mesh and anchor rods.
[0062] Step S7, transfer to the adjacent side mining area: repeat steps S2 to S6 until the disc area stratified mining is completed. From the bottom of the mining area to the top plate height, a chute protection ring is built above the chute 7 using precast concrete rings or bricks. When upward stratified mining is adopted, the protection ring can continue to be used as the chute 7 during the upper stratified mining; when downward stratified mining is adopted, the protection ring can be used as the mining area return air filling skylight 8. The inner diameter of the protection ring is consistent with the diameter of the chute 7, and the ring thickness is 100mm.
[0063] Step S8, transfer to the upper (lower) layer stope, and repeat steps S2 to S6 until the panel area is mined.
[0064] The above mining method can achieve the following beneficial effects:
[0065] (1) It realizes mechanized and continuous production of the entire process of ore dropping, support, transportation, and simplifies the production process of the mining site.
[0066] (2) Improved production capacity of the mine. The mine production capacity is no less than 1,000 t / d, which is 400% to 500% of the traditional horizontal layered filling method.
[0067] (3) Reduced recovery loss rate and dilution rate. The continuous mechanized mining method based on the integrated mining, support and transportation of the fully-mechanized excavator has reduced the ore loss rate in the mining area to 3-5% and the dilution rate to 4-6%, which are about 50% and 60% lower than the traditional horizontal layered filling method.
[0068] (4) The number of working faces and production sections in the mining field is reduced. The continuous mechanized mining method based on the integrated mining, support and transportation of the fully-mechanized excavator is adopted. In the embodiment, the whole mine only needs to have two working faces for mining at the same time, one mining field for preparation, and one production section to meet the production capacity requirements. Compared with the traditional upward horizontal layered filling method, the number of working faces for mining is reduced by 70% to 80%, and the number of production sections is reduced by 50%. The required air volume underground is greatly reduced, and the energy consumption is significantly reduced.
[0069] (5) Reduced underground labor quota. The continuous mechanized mining method based on the integrated mining, support and transportation of the fully-mechanized excavator is adopted, and only about 40 operators are needed for the entire shift. Compared with the traditional horizontal layered filling method, the underground mining labor quota is reduced by 70% to 75%.
[0070] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A continuous mechanized mining method for mining, supporting and transporting, characterized in that: The following steps are involved: Step 1, ore body division: Step 1.1, dividing the ore body into several middle sections according to the occurrence of the ore body, dividing the middle section into several subsections, setting multiple layers in the subsection, dividing the layers into several pan areas along the ore body strike, and arranging at least two stopes in the pan areas along the ore body strike; Step 1.2, each middle section is arranged along the strike of the ore body; a vein chute is arranged along the ore-rock boundary line of the lower plate of the ore body and in the center of the plate area, the bottom of the chute is connected with the middle section transport tunnel through the middle section plate area connecting road, and a middle section tunnel belt conveyor is arranged in the middle section transport tunnel at this location, and the middle section tunnel belt conveyor is connected with the bottom of the chute through the middle section connecting belt conveyor; Step 2, arranging a cutting tunnel and a stope belt conveyor tunnel in the stope: the cutting tunnel is arranged along the end of one side of the stope perpendicular to the direction of the ore body, and the stope belt conveyor tunnel is arranged along the direction of the ore body at the boundary line of the ore and rock in the hanging wall vein; Step 3, Mining Equipment Arrangement: Step 3.1, arranging a stope conveying belt conveyor and an end transfer belt conveyor: the stope conveying belt conveyor is arranged in the stope belt conveyor lane, the end transfer belt conveyor is arranged in the cutting level lane, and one end of the end transfer belt conveyor is vertically connected to the stope conveying belt conveyor, and the other end of the end transfer belt conveyor is connected to the chute; Step 3.2, the integrated digging and anchoring machine and the accompanying movable belt conveyor enter the mining area: the integrated digging and anchoring machine faces the mining surface, and the integrated digging and anchoring machine and the mining area conveying belt conveyor can be moved forward together along the mining area conveying belt conveyor; Step 4, mining and mining: Step 4.1, the mined ore is transported by the integrated mining and anchoring machine to the accompanying movable belt conveyor, and then transported to the stope transport belt conveyor. The stope transport belt conveyor transports the ore to the end transfer belt conveyor and unloads it into the chute; Step 4.2: The ore is lowered through the chute to the middle section contact belt conveyor, then transferred to the middle section main tunnel belt conveyor and transported to the main chute, and lifted to the surface; Step 5: After the mining is completed, the anchoring machine, the accompanying movable belt conveyor, the mining field transport belt conveyor and the end transfer belt conveyor are removed; Step 6: construct a filling retaining wall to seal the goaf; the filling pipeline enters the goaf from the return air filling skylight; Step 7, transfer to the adjacent side mining area: repeat steps 2 to 6 until the layered mining of the panel area is completed; from the bottom plate to the top plate height of the mining area, use precast concrete rings or bricks to build a chute protection ring above the chute.
2. The continuous mechanized mining method for mining, supporting and transporting according to claim 1 is characterized in that: When performing step 4, a single hydraulic prop is required to support the roof of the goaf, and an anchor net is set up in the roof of the goaf.
3. The continuous mechanized mining method for mining, supporting and transporting according to claim 2 is characterized in that: A plurality of the single hydraulic props are arranged in an array in the goaf; the distance between the single hydraulic props near the side of the lower wall of the mining area and the side wall is greater than or equal to 4m.
4. The continuous mechanized mining method for mining, supporting and transporting according to claim 2 is characterized in that: A support pad is provided on the top of the single hydraulic support.
5. The continuous mechanized mining method for mining, supporting and transporting according to claim 2 is characterized in that: After completing step 5, the single hydraulic prop is withdrawn from the site in a backward withdrawal sequence.
6. The continuous mechanized mining method for mining, supporting and transporting according to claim 5 is characterized in that: In step 6, after all the single hydraulic props are withdrawn, a filling retaining wall is constructed.
7. The continuous mechanized mining method for mining, supporting and transporting according to claim 1, characterized in that: The bottom of the accompanying movable belt conveyor is a rubber wheel walking mechanism connected to the stope transport belt conveyor.
8. The continuous mechanized mining method for mining, supporting and transporting according to claim 1, characterized in that: The step 1 also includes: arranging a segmented tunnel in each segment along the direction of the ore body, the middle section transport tunnel is connected with the segmented tunnel through a segmented connecting road, and the segmented connecting road is connected with the mining area through a layered connecting road.
Citation Information
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Thin ore body mining method based on remote intelligent heading machine
CN113803071A
Filling mining method for continuous backstoping of gently inclined parallel medium thick ore body group
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