Novel underground cemented filling system

Abstract

The utility model relates to the technical field of underground filling, and provides a novel underground cemented filling system which comprises a main transportation roadway, a transshipment chamber, a slope ramp, a waste rock bin, an air return structure, a first crushing chamber, a second crushing chamber, a gravel temporary storage yard and a stirring chamber. The slope ramp is connected with the transshipment chamber, the waste rock bin is communicated with the slope ramp, and the air return structure is connected with the tail end of the main transportation roadway. The influence of waste rocks on the ground surface environment can be effectively reduced, dust pollution and geological disaster risks caused by ground surface stacking are reduced, secondly, the waste rocks are directly treated underground, the waste rocks are directly treated underground, and the environment is protected. According to the filling method, repeated transportation of waste rocks is reduced, the transportation distance of filling materials is reduced, and therefore the filling cost is remarkably reduced, and by optimizing the filling pipeline and reducing the requirement for filling drill holes, the distance of the filling pipeline and the maintenance cost are further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of underground filling, in particular to a novel underground cementing filling system. Background Art

[0002] In the mining process, the treatment and utilization of waste rock has always been a key issue in the development of the mining industry. Traditional methods of waste rock treatment include surface stacking and backfilling of goafs, but these methods have many problems. For example, surface stacking will occupy a large amount of land resources and may cause environmental pollution and geological disasters.

[0003] As a mining method that can effectively control rock movement and surface subsidence, backfill mining is particularly suitable for deep mining. When using waste rock cementation backfilling, the underground waste rock needs to be transported to the ground for crushing, and then mixed with cement and water and transported to the underground goaf. There is repeated transportation, and the filling station is built on the surface, which is far away from the underground goaf. The filling slurry has a long transportation distance and the comprehensive filling cost is high.

[0004] In view of this, this application is hereby filed. Utility Model Content

[0005] This application proposes a new underground cementing filling system to solve the technical problems that when the waste rock cementing filling method is used in the prior art, the underground waste rock needs to be transported to the ground for crushing, and then mixed with cement and water and transported to the underground goaf, which results in repeated transportation, and the filling station is built on the surface, which is far away from the underground goaf, and the filling slurry is transported over a long distance, resulting in high comprehensive filling costs. The above technical objectives of the utility model are achieved through the following technical solutions:

[0006] A novel underground cementing and filling system comprises a main transport tunnel, a transfer chamber, a ramp, a waste rock bin, a return air structure, a first crushing chamber, a second crushing chamber, a gravel cache yard, and a mixing chamber. The transfer chamber is arranged in the middle position of the main transport tunnel, the ramp is connected to the transfer chamber, the waste rock bin is connected to the ramp, the return air structure is connected to the tail end of the main transport tunnel, the waste rock bin is connected to the first crushing chamber, the first crushing chamber is connected to the second crushing chamber, the second crushing chamber is connected to the gravel cache yard, the gravel cache yard is connected to the mixing chamber, and the tail end of the ramp is connected to the mixing chamber.

[0007] Furthermore, the return air structure includes a return air lane and a return air skylight, the return air lane is connected to the tail end of the main transport lane, and the return air skylight is respectively arranged in the waste rock bin, the first crushing chamber, the second crushing chamber, the crushed stone buffer yard and between the mixing chamber and the return air lane.

[0008] Furthermore, connection galleries are provided between the crushed stone buffer yard and the ramp, and between the crushed stone buffer yard and the mixing chamber.

[0009] Furthermore, first transportation channels are provided between the first crushing chamber, the second crushing chamber and the ramp in pairs, and the first transportation channels are distributed in a triangular shape.

[0010] Furthermore, a second transportation channel is provided between the waste rock bin, the ramp and the first crushing chamber.

[0011] Compared with the prior art, the beneficial effects of the present utility model include:

[0012] This application can effectively reduce the impact of waste rock on the surface environment, reduce the dust pollution and the risk of geological disasters caused by surface stacking. Secondly, by directly treating waste rock underground, the repeated transportation of waste rock is reduced, the transportation distance of filling materials is shortened, thereby significantly reducing the filling cost. This application further reduces the distance and maintenance cost of the filling pipeline by optimizing the filling pipeline and reducing the demand for filling boreholes; effectively reduces the problem of repeated transportation of underground waste rock, reduces the length of the filling pipeline, reduces the comprehensive filling cost, does not require special construction of filling boreholes, and can build stations at appropriate positions according to the actual underground roadway layout and the position of the filling area in combination with the underground engineering geological conditions, reduces the distance of the filling pipeline, optimizes the filling pipeline, and reduces the filling cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of the present utility model.

[0014] In the figure: 1, main transportation roadway; 2, transfer chamber; 3, ramp; 4, connection gallery; 5, waste rock bin; 6, return airway; 7, first crushing chamber; 8, return air shaft; 9, second crushing chamber; 10, crushed stone buffer yard; 11, mixing chamber. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0016] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0017] To make the objectives, technical solutions, and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present utility model. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present utility model.

[0018] Please refer to the attached Figure 1 , a new type of underground cemented filling system, comprising a main transportation roadway 1, a transfer chamber 2, a ramp 3, a waste rock bin 5, a return air structure, a first crushing chamber 7, a second crushing chamber 9, a crushed stone buffer yard 10, and a mixing chamber 11. The transfer chamber 2 is arranged at the middle position of the main transportation roadway 1. The ramp 3 is connected to the transfer chamber 2. The waste rock bin 5 is communicated with the ramp 3. The return air structure is connected to the end of the main transportation roadway 1. The waste rock bin 5 is connected to the first crushing chamber 7. The first crushing chamber 7 is connected to the second crushing chamber 9. The second crushing chamber 9 is connected to the crushed stone buffer yard 10. The crushed stone buffer yard 10 is connected to the mixing chamber 11. The end of the ramp 3 is connected to the mixing chamber 11.

[0019] Adopting the above technical solutions, the main transportation roadway 1 serves as the main transportation channel, connecting the key parts of the entire filling system. The waste rock is transported to the waste rock bin 5 by a mine car through the main transportation roadway 1 and the return air roadway 6. The transfer chamber 2 is located in the middle of the main transportation roadway 1 and is used for transferring materials. The ramp 3 connects the transfer chamber 2 and the waste rock bin 5 and is used for material transportation. The waste rock bin 5 stores the waste rock mined from the underground. The return air structure includes a return air roadway 6 and a return air raise 8 and is used for ventilation inside the system. The first crushing chamber 7 and the second crushing chamber 9 are used for crushing the waste rock to the required particle size. The crushed stone buffer yard 10 temporarily stores the crushed waste rock. The mixing chamber 11 mixes the waste rock, cement, water, etc. to make a filling slurry.

[0020] It should be noted that inside the mixing chamber 11, it is composed of a motor, a pulley, a speed reducer, gears, a mixing device, a mixing drum, etc. The above components are all prior arts. The mixing drum is composed of two connected trough shapes, and it is equipped with two horizontally arranged mixing shafts inside. Mixing blades are hung on the shafts. During operation, the rotating shafts drive the blades to perform a forced mixing effect of shearing, extruding, and flipping and pushing the materials in the drum. When the mixing shafts rotate, on the one hand, the mixture at the bottom and in the middle of the mixing drum is flipped upward, and on the other hand, the mixture is pushed and pressed forward and backward along the axis respectively, so that the mixture can be quickly and evenly mixed, thus having a good mixing effect.

[0021] In some embodiments, the air return structure includes an air return roadway 6 and an air return shaft 8. The air return roadway 6 is connected to the end of the main haulage roadway 1, and the air return shaft 8 is respectively arranged between the waste rock bin 5, the first crushing chamber 7, the second crushing chamber 9, the crushed stone buffer yard 10 and the mixing chamber 11 and the air return roadway 6.

[0022] The air return roadway 6 is connected to the end of the main haulage roadway 1 and serves as a ventilation and air return passage. The air return shaft 8 is arranged between each key chamber and yard to ensure ventilation efficiency and carry away dust and heat.

[0023] In some embodiments, connection roadways 4 are provided between the crushed stone buffer yard 10 and the ramp 3, and between the crushed stone buffer yard 10 and the mixing chamber 11. The connection roadways 4 are arranged between the crushed stone buffer yard 10 and the ramp 3, and between the crushed stone buffer yard 10 and the mixing chamber 11 for material transfer.

[0024] In some embodiments, first transportation channels are provided between the first crushing chamber 7, the second crushing chamber 9 and the ramp 3 in pairs. The first transportation channels are distributed in a triangular shape. The first transportation channels connect the first crushing chamber 7, the second crushing chamber 9 and the ramp 3 to form a triangular distribution, optimizing the transportation path and improving transportation efficiency.

[0025] In some embodiments, a second transportation channel is provided between the waste rock bin 5, the ramp 3 and the first crushing chamber 7. The second transportation channel connects the waste rock bin 5, the ramp 3 and the first crushing chamber 7, providing another transportation route and increasing the flexibility and reliability of the system.

[0026] In some embodiments, the mixing chamber 11 is located directly above the underground empty area. The mixing chamber 11 being located directly above the underground empty area facilitates directly transporting the filling slurry to the area that needs to be filled, reducing the transportation distance and lowering energy consumption.

[0027] Process flow:

[0028] Waste rock is transported from the underground tunneling face by ore cars, through the main haulage roadway 1 to the waste rock bin 5 for storage. A load-haul-dump (LHD) vehicle feeds the waste rock into a vibrating feeder through a buffer bin and unloads it into the crushing system. The crushing system is set with three-stage crushing. Considering the underground space layout, the three-stage crushing system is designed in two chambers. Among them, the first-stage and second-stage crushing are arranged in the first crushing chamber 7, and the third-stage crushing is separately divided into the second crushing chamber 9. The crushed stones between the first crushing chamber 7 and the second crushing chamber 9 are transported by belt. Finally, the particle size of the crushed stones is controlled within -8 mm and transported to the crushed stone buffer yard 10 by a belt conveyor;

[0029] The crushed stones are transported from the crushed stone yard to the buffer weighing hopper by an LHD vehicle. The crushed stones are quantitatively measured by a weighing scale and discharged onto the transport belt below the weighing hopper, and then transported by belt to the waste rock buffer hopper above the mixing main machine and automatically discharged into the mixer during preparation.

[0030] Bulk cement is transported from the ground to the upper shaft of the filling station by ore cars, lowered to the mixing chamber 11 by an electric hoist for temporary storage, and then transported to an automatic bag opener by a feeding belt for automatic cement bag opening. After weighing, it is transported to the cement buffer hopper above the mixing main machine by a screw conveyor and automatically discharged into the mixer during preparation;

[0031] Water is supplied by the underground sump and the water volume is controlled by a water weighing scale through gravity flow or pumping.

[0032] After the waste rock, cement, and water are respectively quantitatively weighed, the automatic control system automatically controls the bottom discharge into the mixing chamber 11. Through sufficient mixing and stirring, qualified filling slurry is prepared, discharged into the slurry buffer hopper, and then enters the drag pump hopper through a chute to transport the filling slurry to the underground goaf area.

[0033] It should be understood that the above specific embodiments of the present invention are only used for exemplary illustration or explanation of the principle of the present invention, and do not constitute a limitation to the present invention. Therefore, any modifications, equivalent replacements, improvements, etc. made without departing from the spirit and scope of the present invention shall be included within the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications falling within the scope and boundary of the appended claims, or equivalent forms of such scope and boundary.

Claims

1. A new type of underground cementing filling system, characterized in that: The invention comprises a main transport tunnel (1), a transfer chamber (2), a ramp (3), a connecting tunnel (4), a waste rock bin (5), a return air structure, a first crushing chamber (7), a second crushing chamber (9), a crushed rock buffer yard (10), and a mixing chamber (11), wherein the transfer chamber (2) is arranged in the middle of the main transport tunnel (1), the ramp (3) is connected to the transfer chamber (2), the waste rock bin (5) is connected to the ramp (3), and the waste rock bin (5) is connected to the second crushing chamber (9). The first crushing chamber (7) is connected to the second crushing chamber (9), the second crushing chamber (9) is connected to the gravel buffer yard (10), the gravel buffer yard (10) is connected to the mixing chamber (11), the tail end of the ramp (3) is connected to the mixing chamber (11), and the return air structure includes a return air lane (6) and a return air skylight (8), and the return air skylight (8) is connected to the return air lane (6).

2. A novel underground cementing filling system according to claim 1, characterized in that: The return air tunnel (6) is connected to the rear end of the main transport tunnel (1), and the waste rock bin (5), the first crushing chamber (7), the second crushing chamber (9), the crushed rock buffer yard (10) and the mixing chamber (11) are respectively provided with the return air skylight (8) connected to the return air tunnel (6).

3. A novel underground cementing filling system according to claim 1, characterized in that: A connecting tunnel (4) is provided between the gravel buffer yard (10) and the ramp (3), and between the gravel buffer yard (10) and the mixing chamber (11).

4. A novel underground cementing filling system according to claim 1, characterized in that: A first transport channel is provided between each of the first crushing chamber (7), the second crushing chamber (9) and the ramp (3), and the first transport channels are distributed in a triangular shape.

5. A novel underground cementing filling system according to claim 1, characterized in that: A second transport passage is provided between the waste rock bin (5), the ramp (3) and the first crushing chamber (7).

Images