Multi-layer composite structure underground wet spraying concrete mixing plant

Abstract

The utility model discloses an underground wet-spraying concrete mixing plant with a multi-layer composite structure, and belongs to the technical field of mining. Comprising a gravel storage chamber, a dosing machine chamber, a stirrer chamber and an auxiliary material chamber which are sequentially communicated, and the height of a bottom plate of the stirrer chamber is lower than that of bottom plates of the dosing machine chamber and the auxiliary material chamber; the sandstone material storage chamber is communicated with the batching machine chamber through a forklift transportation connection way; a batching machine storage bin, a gravel weighing hopper and a horizontal conveying belt are arranged in the batching machine chamber, and the front end of the horizontal conveying belt extends into the stirrer chamber; the mixer chamber is communicated with the main slope ramp through the cement tanker linking way; a concrete mixing tank and a cement vertical tank are arranged in the mixer chamber; the auxiliary material chamber is internally communicated with the main slope ramp through a roadway, a cement horizontal tank, an additive tank and a mixing water tank are arranged in the auxiliary material chamber, and the additive tank and the mixing water tank are communicated to the upper part of the cement vertical tank through pipelines.

Description

Technical Field

[0001] The utility model belongs to the technical field of mining, and in particular relates to an underground wet spraying concrete mixing station with a multi-layer composite structure. Background Art

[0002] With the growth of demand for mineral resources in my country, deep resource mining has become the norm. In order to ensure safe production in mines, underground support has become increasingly important, and wet shotcrete support has become increasingly widely used. The traditional method for preparing wet shotcrete slurry is to establish a wet shotcrete mixing station on the surface. The mixing station is responsible for the proportioning and mixing of wet shotcrete materials. Its advantages are low construction cost, relatively simple planning and construction, but the layout of the wet shotcrete mixing station on the surface requires a large industrial site, and the prepared wet shotcrete slurry needs to be transported to the underground working face for spraying by concrete tankers through ramps. The purchase cost and wear cost of concrete tankers are high, the number of concrete tankers required is large, and the transportation cost of concrete slurry is also high. This also increases the transportation burden of the ramp. At the same time, in the long-distance transportation of wet shotcrete slurry, it is easy to cause the quality of concrete slurry to continue to decline as the cement hydration reaction proceeds. If there are sudden problems such as ramp blockage, the slurry in the concrete tanker may be at risk of hardening and solidification. Therefore, the establishment of an underground wet shotcrete mixing station has become the best choice for deep well mining.

[0003] Since the concrete slurry making equipment is relatively large in size, including sand, gravel, cement feeding, slurry making, loading and other slurry making process links, the mixing station structure is relatively complex. Surface wet spraying concrete mixing station is generally not limited by the surface space, usually adopts a plane layout, such as cement tank, sand and gravel silo, slurry making system and mixing water, admixture system are basically in a plane with a small height difference.

[0004] If the underground mixing station is designed according to the construction concept of the surface mixing station, the construction of the underground mixing station requires the excavation of a huge underground space. At the same time, the greater the depth of the underground mixing station, the more severe the ground pressure will be. The stability of the large underground chamber becomes a very difficult problem. Although various high-strength support technologies may solve the stability problem of the above-mentioned deep ultra-large chambers, their construction costs will also increase exponentially. Therefore, the traditional layout of the surface wet spraying mixing station is difficult to adapt to the construction of underground wet spraying concrete mixing stations under deep high-stress conditions.

[0005] How to reasonably design an underground wet shotcrete mixing station in deep mines to meet the engineering needs of underground concrete slurry production while minimizing the excavation space of the chamber has become an engineering problem that is expected to be solved. Utility Model Content

[0006] In order to solve the problem of building a mixing station underground and reduce the excavation of chambers to the maximum extent, the utility model provides an underground wet spraying concrete mixing station with a multi-layer composite structure.

[0007] To this end, the utility model adopts the following technical solutions:

[0008] A multi-layer composite structure underground wet shotcrete mixing station, comprising a sand and gravel storage chamber, a batching machine chamber, a mixer chamber and an auxiliary material chamber connected in sequence, the bottom plate height of the mixer chamber is lower than the bottom plates of the batching machine chamber and the auxiliary material chamber; a gravel bin and a sand bin are arranged in the sand and gravel storage chamber, the gravel bin and the sand bin are connected to the ground surface through a vertical shaft, and the sand and gravel storage chamber and the batching machine chamber are connected through a forklift transportation link; a batching machine storage bin, a sand and gravel weighing hopper and a horizontal transport belt are arranged in the batching machine chamber, and the front end of the horizontal transport belt extends to the mixer Inside the mixer chamber; the mixer chamber is connected to the main ramp through a cement tanker connecting road; the auxiliary material chamber is connected to the main ramp through a laneway; a concrete mixing tank and a cement vertical tank are provided in the mixer chamber, and the discharge port of the cement vertical tank is connected to the feed port of the concrete mixing tank through a screw feeder; a cement horizontal tank is provided in the auxiliary material chamber, and the cement horizontal tank is connected to the cement vertical tank through a pipeline, and the cement horizontal tank is used to transport cement to the cement vertical tank; an additive tank and a mixing water tank are also provided in the auxiliary material chamber, and the additive tank and the mixing water tank are connected to the upper part of the cement vertical tank through a pipeline.

[0009] Furthermore, it also includes a control system, which is used to control the opening and closing of the sand and gravel weighing hopper, horizontal conveyor belt, concrete mixing tank, cement vertical tank, screw feeder, cement horizontal tank, admixture tank and mixing water tank.

[0010] Furthermore, the sand and gravel silo includes a gravel silo and a sand silo.

[0011] Furthermore, the cement tank, admixture tank and mixing water tank are located in the same tunnel, and the admixture tank is located between the cement tank and the mixing water tank.

[0012] Furthermore, it also includes a loading chamber, which is located at the same level as the mixer chamber and is connected to the cement tank truck connecting road.

[0013] Furthermore, it also includes a sedimentation tank. The loading chamber is dug under the ground in a slope to form a sedimentation tank. A clear water tank is provided on one side of the sedimentation tank. The overflow of the sedimentation tank is connected to the clear water tank, and a filtering device is provided on the overflow port.

[0014] Furthermore, a folding steel frame is fixed above the sedimentation tank, and the folding steel frame includes columns fixed on the left and right sides of the tail of the sedimentation tank, and the two columns are arranged in parallel; the middle parts of the two columns are respectively connected to cantilever steel frames, and the two cantilever steel frames are arranged along the top edge of the sedimentation tank and the tail ends are respectively rotatably connected to the two columns; a steel strand is connected between the middle part of the cantilever steel frame and the top of the column, and the winding steel strand drives the cantilever steel frame to be retracted.

[0015] Furthermore, a clean water pump and a float valve are installed in the clean water tank, and the clean water pump is used to discharge the water in the clean water tank into the underground sewage pipe.

[0016] The beneficial effects of the utility model are:

[0017] 1. Sand and gravel are placed from the surface to the sand and gravel storage chamber through the sand and gravel shaft, and there is no need for mining trucks to transport them from the surface to the underground through the ramp, which alleviates the congestion of the ramp and improves the material transportation efficiency;

[0018] 2. The gravel storage hopper, horizontal transport belt and main structure of the mixing station (mainly the mixing and slurry making system and the slurry unloading, loading and transportation system) are designed at different levels and spatial positions, which not only reduces the spatial size of the main structure chamber of the mixing station, greatly improves the stability of the main structure chamber, but also simplifies the complexity of the main structure chamber and reduces the difficulty of construction;

[0019] 3. Since the sand and gravel enter the mixing tank through a horizontal belt, compared with the traditional belt or lifting bucket feeding method, the height of the main structure chamber is reduced, which is conducive to the convenience of chamber construction, as well as the stability of the chamber and reduces construction costs;

[0020] 4. Vertical tanks are the inevitable choice for cement transportation, metering and adding to mixing tanks, but the height of the vertical tanks is large, and the excavation and support of the chambers to accommodate the vertical tanks are relatively difficult. The use of small-volume vertical tanks can solve this problem well; the cement storage capacity of small-volume vertical tanks is limited, and cannot meet the requirements of cement consumption and reserve for slurry making, so a combination of vertical tanks + horizontal tanks is adopted; the height of the horizontal tank is small, and the capacity of the horizontal tank can be achieved by increasing the length of the horizontal tank. For shaft and tunnel engineering, the excavation construction, construction cost and stability of the horizontal chamber are significantly better than those of tall vertical chambers. Therefore, the combination of vertical tanks + horizontal tanks is adopted, which not only solves the requirements for cement storage, but also realizes the need to use vertical tanks to transport cement for wet spraying slurry making, and also reduces the spatial volume of the main chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the plan layout of the underground wet shotcrete mixing station of the utility model;

[0022] Figure 2It is a schematic diagram of the layout of the batching machine chamber, the mixer chamber and the auxiliary material chamber of the utility model;

[0023] Figure 3 This is the equipment layout diagram of the utility model batching machine chamber;

[0024] Figure 4 This is a schematic diagram of the utility model transport tanker receiving materials on a liftable steel frame;

[0025] Figure 5 This is a display diagram of the utility model that can lift and lower the steel frame;

[0026] Figure 6 This is a lifting display diagram of the utility model that can lift the steel frame;

[0027] Figure 7 This is a schematic diagram of the utility model scraper cleaning a sedimentation tank;

[0028] Figure 8 This is a position relationship diagram of the sedimentation tank and the clean water tank of the utility model;

[0029] In the figure: 10- batching machine chamber, 101- stone bin, 102- sand bin, 103- sand and gravel weighing hopper, 104- batching machine storage bin, 105- horizontal transport belt, 106- forklift transport connection road, 107- sand and gravel waiting hopper;

[0030] 20-mixer chamber, 201-concrete mixing tank, 202-cement metering hopper, 203-cement vertical tank, 204-screw feeder, 205-loading chamber, 206-cement metering hopper, 207-cement tank truck access road, 208-entry and exit vehicle access road;

[0031] 30- auxiliary material chamber, 301- car wash chamber, 302- material chamber, 303- control chamber, 304- maintenance chamber, 305- cement tank, 306- admixture tank, 307- mixing water tank;

[0032] 401-sedimentation tank, 402-clean water tank, 403-clean water pump, 404-overflow port, 405-pumping main pipe;

[0033] 5-liftable steel frame, 501-column, 502-first cantilever steel frame, 503-second cantilever steel frame, 504-steel wire rope. DETAILED DESCRIPTION

[0034] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0035] like Figure 1 and 2As shown, a multi-layer composite structure underground wet spraying concrete mixing station includes a sand and gravel storage chamber, a batching machine chamber 10, a mixer chamber 20 and an auxiliary material chamber 30 which are connected in sequence, and the bottom plate height of the mixer chamber 20 is lower than the bottom plate heights of the batching machine chamber 10 and the auxiliary material chamber 30.

[0036] like Figure 1 As shown, a gravel bin 101 and a sand bin 102 are provided in the gravel storage chamber, and the gravel bin 101 and the sand bin 102 are connected to the surface through a vertical shaft. The gravel storage chamber and the batching machine chamber 10 are connected through a forklift transportation link 106; the gravel required for slurrying in the mixing station is transported from the surface to the vertical shaft, and then slid from the vertical shaft to the gravel storage chamber underground. When slurrying, the gravel is transported from the gravel bin by a forklift. The mixer chamber 20 is connected to the main ramp through a cement tanker link 207; the auxiliary material chamber 30 is connected to the main ramp through a roadway. The batching machine chamber 10 is provided with a batching machine storage bin 104, a gravel weighing hopper 103 and a horizontal conveying belt 105, and the front end of the horizontal conveying belt 105 extends into the mixer chamber 20; the mixer chamber 20 is connected to the main ramp through a cement tanker connecting road 207; the auxiliary material chamber 30 is connected to the main ramp through a roadway;

[0037] like Figure 2 As shown, a concrete mixing tank 201 and a cement vertical tank 203 are provided in the mixer chamber 20, and the discharge port of the cement vertical tank 203 is connected to the feed port of the concrete mixing tank 201 through a screw feeder 204; a cement horizontal tank 305 is provided in the batching machine chamber 10, and the cement horizontal tank 305 is connected to the cement vertical tank 203 through a pipeline, and the cement horizontal tank 305 is used to transport cement into the cement vertical tank 203; an admixture tank 306 and a mixing water tank are also provided in the batching machine chamber 10, and the admixture tank 306 and the mixing water tank are connected to the upper part of the concrete mixing tank 201 through a pipeline; a sand and gravel weighing hopper 103 is provided in the auxiliary material chamber 30, and the sand and gravel weighing hopper 103 is connected to the upper part of the cement vertical tank 203 through a horizontal conveyor belt.

[0038] The control system is also included, and the control system is used to control the opening and closing of the sand and gravel weighing hopper 103, the horizontal conveying belt, the concrete mixing tank 201, the cement vertical tank 203, the screw feeder 204, the cement horizontal tank 305, the admixture tank 306 and the mixing water tank. The cement horizontal tank 305, the admixture tank 306 and the mixing water tank are located in the same lane, and the admixture tank 306 is located between the cement horizontal tank 305 and the mixing water tank 307.

[0039] It also includes a loading chamber, which is at the same level as the mixer chamber 20 and is connected to the cement tanker connection road 207. It also includes a sedimentation tank 401, which is formed by digging a slope under the ground of the loading chamber. A clear water tank 402 is provided on one side of the sedimentation tank 401, and the overflow of the sedimentation tank 401 is connected to the clear water tank 402, and a filtering device is provided on the overflow port 404.

[0040] A folding steel frame is fixed above the sedimentation tank 401. The folding steel frame includes columns fixed to the left and right sides of the tail of the sedimentation tank 401. The two columns are arranged in parallel. The middle of the two columns are respectively connected to cantilever steel frames. The two cantilever steel frames are arranged along the top edge of the sedimentation tank 401 and the tail ends are rotatably connected to the two columns. A steel strand is connected between the middle of the cantilever steel frame and the top of the column. The winding steel strand drives the cantilever steel frame to be retracted. A clean water pump 403 and a float valve are installed in the clean water tank 402. The clean water pump 403 is used to discharge the water in the clean water tank 402 to the underground sewage pipe.

[0041] The size of the batching machine chamber 10 is designed as follows: (length × width × height) 7m × 10m × 5m. It is located on the left side of the topmost level of the wet shotcreting mixing station and is connected to the forklift transport liaison 106 on the left side. The size of the forklift transport liaison 106 is designed as follows: (length × width × height) 52m × 6m × 5m. It is mainly used as a channel for the scraper to load sand and gravel from the material storage shaft to the batching machine hopper. In order to facilitate the scraper to transport sand and gravel, the sand bin 102 and the gravel bin 101 are arranged in the forklift transport liaison 106. The size of the sand and gravel bin (length × width × height) is 15m × 5m × 5m, and the sand and gravel should be stacked in grades and must not be mixed with each other. The main chamber of the mixer is located in the middle of the next level of the wet shotcreting mixing station. Its size is designed as follows: (length × width × height) 12m × 10m × 20m. The spray mixer, wet spray material feeding system, and cement silo are arranged in the main chamber of the mixer, among which the loading chamber (net section specification (length × width × height) is 4m × 5m × 5m) located below the wet spray mixer is connected to the concrete transport tank truck channel (net section specification (length × width × height) is 20m × 7m × 5m), which is mainly used for loading and exiting concrete transport tank trucks; the auxiliary material chamber 30 is set on the right side of the topmost level of the wet spray mixing station, among which the cement silo horizontal tank, admixture tank 306 and mixing water tank 307 are arranged in the auxiliary material chamber 30 and connected to the cement tank truck transportation connection road on the right side. The cement tank truck transportation connection road is designed to have a size of: (length × width × height) 44m × 6m × 5m, which is mainly used to unload bulk cement in the cement tank truck into the cement horizontal tank 305.

Claims

1. A multi-layer composite structure underground wet spraying concrete mixing station, characterized in that: It comprises a gravel storage chamber, a batching machine chamber (1), a mixer chamber (20) and an auxiliary material chamber (30) which are connected in sequence, wherein the bottom plate height of the mixer chamber (20) is lower than the bottom plates height of the batching machine chamber (1) and the auxiliary material chamber (30); A gravel bin (101) and a sand bin (102) are provided in the gravel storage chamber. The gravel bin (101) and the sand bin (102) are connected to the surface through a vertical shaft. The gravel storage chamber is connected to the batching machine chamber (1) through a forklift transportation connection road (106). A batching machine storage bin (104), a gravel weighing hopper (103) and a horizontal conveying belt (105) are provided in the batching machine chamber (1), and the front end of the horizontal conveying belt (105) extends into the mixer chamber (20); the mixer chamber (20) is connected to the main ramp through a cement tanker connecting road; the auxiliary material chamber (30) is connected to the main ramp through a roadway; A concrete mixing tank (201) and a cement vertical tank (203) are provided in the mixer chamber (20), and the discharge port of the cement vertical tank (203) is connected to the feed port of the concrete mixing tank (201) via a screw feeder (204); A cement horizontal tank (305) is provided in the auxiliary material chamber (30), and the cement horizontal tank (305) is connected to the cement vertical tank (203) through a pipeline. The cement horizontal tank (305) is used to transport cement to the cement vertical tank (203). An additive tank (306) and a mixing water tank are also provided in the auxiliary material chamber (30), and the additive tank (306) and the mixing water tank are connected to the upper part of the cement vertical tank (203) through a pipeline.

2. The multi-layer composite structure underground wet spraying concrete mixing station according to claim 1 is characterized in that: The system also includes a control system, which is used to control the opening and closing of the gravel weighing hopper (103), the horizontal conveying belt, the concrete mixing tank (201), the vertical cement tank (203), the screw feeder (204), the horizontal cement tank (305), the admixture tank (306) and the mixing water tank.

3. The multi-layer composite structure underground wet spraying concrete mixing station according to claim 1 is characterized in that: The gravel silo comprises a gravel silo (101) and a sand silo (102).

4. The multi-layer composite structure underground wet spraying concrete mixing station according to claim 1 is characterized in that: The cement tank (305), the admixture tank (306) and the mixing water tank are located in the same tunnel, and the admixture tank (306) is located between the cement tank (305) and the mixing water tank (307).

5. The multi-layer composite structure underground wet spraying concrete mixing station according to claim 1 is characterized in that: It also includes a loading chamber (205), which is located at the same level as the mixer chamber (20), and the loading chamber (205) is connected to the cement tank truck connecting channel.

6. The multi-layer composite structure underground wet spraying concrete mixing station according to claim 5, characterized in that: The invention also comprises a sedimentation tank (401). The loading chamber (205) is dug under the ground in a slope to form the sedimentation tank (401). A clear water tank (402) is provided on one side of the sedimentation tank (401). The overflow of the sedimentation tank (401) is connected to the clear water tank (402), and a filtering device is provided on the overflow port.

7. The multi-layer composite structure underground wet spraying concrete mixing station according to claim 6, characterized in that: A folding steel frame is fixed above the sedimentation tank (401), and the folding steel frame includes columns fixed to the left and right sides of the tail of the sedimentation tank (401), and the two columns are arranged in parallel; the middle parts of the two columns are respectively connected to cantilever steel frames, and the two cantilever steel frames are arranged along the top edge of the sedimentation tank (401) and the tail ends are respectively rotatably connected to the two columns; a steel strand is connected between the middle part of the cantilever steel frame and the top of the column, and the winding steel strand drives the cantilever steel frame to be folded.

8. The multi-layer composite structure underground wet spraying concrete mixing station according to claim 6, characterized in that: A clean water pump and a float valve are installed in the clean water tank (402), and the clean water pump is used to discharge the water in the clean water tank (402) into the underground sewage pipe.

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