All-component coal gangue concrete preparation system and method

Abstract

The invention discloses an all-component coal gangue concrete preparation system which comprises a screening machine, the screening machine is connected with a first fine material gangue bin, and the screening machine is further sequentially connected with a mineral separation system, a crusher, an activating and calcining system, a grinding and material forming system and an intelligent batching system. The mineral separation system is further sequentially connected with another crusher and a third-level screening machine, the third-level screening machine is connected with a first fine material gangue bin, the third-level screening machine is further connected with a second medium material gangue bin and a third coarse material gangue bin, and the first fine material gangue bin, the second medium material gangue bin and the third coarse material gangue bin are all connected with the intelligent batching system. The intelligent batching system is connected with a mixing and stirring system. The invention further discloses a preparation method of the all-component coal gangue concrete. According to the all-component coal gangue concrete preparation system and method, the comprehensive utilization rate of coal gangue is increased, the using amount of a cement cementing material is reduced, and the mine production cost and the gangue disposal cost are reduced.

Description

Technical Field

[0001] This invention belongs to the field of concrete preparation technology, specifically relating to a system for preparing all-component coal gangue concrete and a method for preparing all-component coal gangue concrete. Background Technology

[0002] Coal gangue is a major solid waste generated during coal mining and washing. Its long-term accumulation not only occupies land but also poses environmental problems such as spontaneous combustion, dust pollution, and water pollution. Currently, large-scale disposal methods such as underground backfilling can consume some gangue, but they suffer from bottlenecks such as large system construction investment, high operating costs, and interference with mine production, placing a heavy economic and operational burden on enterprises.

[0003] Achieving high-value-added resource utilization of coal gangue is a key path to overcoming the aforementioned predicament. Mineral composition analysis of coal gangue samples from multiple locations revealed that its main component is aluminum-silicon oxide, with a content generally exceeding 50%, giving it an inherent advantage as a potential raw material for preparing cementitious materials. At the same time, coal mines have a huge demand for cement and other cementitious materials in various underground and surface engineering projects, leading to a continuous rise in the cost of purchasing them externally.

[0004] Therefore, if high-performance cementitious materials can be prepared by using coal gangue as raw material through a directional activation process, and further compounded with gangue aggregate to form full-component coal mine concrete, it is expected to simultaneously achieve multiple goals such as solid waste reduction, cost reduction, and self-sufficiency in materials, which is of great practical significance for promoting green, cost-reducing, and sustainable development of mines. Summary of the Invention

[0005] The purpose of this invention is to provide a complete coal gangue concrete preparation system, which improves the comprehensive utilization rate of coal gangue, reduces the amount of cementitious materials used, and lowers the production cost and disposal cost of mines.

[0006] Another object of the present invention is to provide a method for preparing all-component coal gangue concrete.

[0007] The technical solution adopted in this invention is a complete coal gangue concrete preparation system, including a screening machine connected to a No. 1 fine gangue bin. The screening machine is also connected in sequence to a mineral sorting system, a crusher, an activation and calcination system, a grinding and material preparation system, and an intelligent batching system. The mineral sorting system is also connected in sequence to another crusher and a three-stage screening machine. The three-stage screening machine is connected to the No. 1 fine gangue bin and is also connected to the No. 2 medium gangue bin and the No. 3 coarse gangue bin. The No. 1 fine gangue bin, the No. 2 medium gangue bin, and the No. 3 coarse gangue bin are all connected to the intelligent batching system, which is connected to a mixing system.

[0008] The invention is further characterized by: The first discharge end of the screening machine is connected to the No. 1 fine material gangue bin, the second discharge end of the screening machine is connected to the mineral sorting system, the first discharge end of the mineral sorting system is connected to the crusher, and the second discharge end of the mineral sorting system is connected to another crusher; the discharge end of the tertiary screening machine is connected to the No. 1 fine material gangue bin.

[0009] It also includes a return conveyor belt. One end of the return conveyor belt is connected to the oversized material discharge end of the three-stage screening machine. The end of the return conveyor belt connected to the oversized material discharge end of the three-stage screening machine is located on the side of the three-stage screening machine away from the feed end of the other crusher. The other end of the return conveyor belt is connected to the feed end of the other crusher. The section of the return conveyor belt connected to the feed end of the other crusher is located on the side of the other crusher near the discharge end of the mineral sorting system.

[0010] The outer wall of the activation and calcination system is equipped with a temperature control interface and a temperature adjustment component. The connection end of the temperature adjustment component is detachably connected to the temperature control interface. The temperature adjustment component is located on the side of the activation and calcination system near the discharge end of the crusher, and the temperature adjustment component and the discharge end of the activation and calcination system are diagonally distributed.

[0011] The intelligent batching system is equipped with a signal receiving interface on the top and also includes a parameter input module. The signal output end of the parameter input module is connected to the signal receiving interface through a wire. The parameter input module is installed on the side of the intelligent batching system near the feeding end of the mixing system, and is adjacent to the material feeding end of the intelligent batching system. Another technical solution adopted in this invention is a method for preparing all-component coal gangue concrete, specifically including the following steps: Step 1: Feed the coal gangue into the screening machine for screening; Step 2: After screening, the materials are fed into the No. 1 fine gangue bin and the mineral sorting system respectively. Step 3: The clay rock gangue separated by the sorting system is crushed by a crusher, then sent to the activation and calcination system, and then sent to the grinding and material processing system to be ground into gangue-based cementitious material. Step 4: The non-clay rock gangue separated by the sorting system is crushed by another crusher and then sent to a three-stage screening machine. After screening, it enters bins 1, 2 and 3. Step 5: Input the requirements into the intelligent batching system, and send the gangue-based cementitious material and materials from each bin to the mixing system according to the proportion, and mix with water to produce concrete.

[0012] Another feature of the technical solution adopted in this invention is that... Step 2 specifically involves: coal gangue smaller than 10mm after screening enters the No. 1 fine gangue bin, while coal gangue larger than 10mm enters the mineral sorting system.

[0013] In step 3, the calcination temperature of the activated calcination system is 800~1200℃.

[0014] Step 4 is as follows: The non-clay rock gangue separated by the mineral sorting system is crushed by another crusher and then sent to a three-stage screening machine. After screening, the material smaller than 10mm goes into bin 1, the material of 10~20mm goes into bin 2, the material of 20~30mm goes into bin 3, and the material larger than 30mm is returned to another crusher via a return conveyor belt.

[0015] In step 5, the concrete mix ratio for the bottom paving of underground roadways is: gangue-based cementitious material: coarse material: medium material: fine material: water = 1: (1.5~2): (1~1.5): (0.5~1): (0.45~0.55); the concrete mix ratio for the side support of the goaf-retaining roadway is: gangue-based cementitious material: fine material: water = 1: (2~3): (0.4~0.5); the gangue-based cementitious material for paste filling is: medium material: fine material: water = 1: (2~2.5): (2.5~3): (1~1.5).

[0016] The beneficial effects of this invention are: This invention provides a complete coal gangue concrete preparation system and method, which uses coal gangue as the sole raw material and coordinates multiple systems such as mineral sorting, activation calcination, gradation control, and intelligent batching to prepare gangue concrete suitable for different mining construction projects. This technical approach not only fully utilizes coal gangue resources, effectively improving its comprehensive utilization rate, but also significantly reduces reliance on external cementitious materials such as cement, simultaneously lowering mine production costs and gangue disposal costs. The entire process aligns with the concept of green mining development and provides a complete and feasible engineering solution for the high-value-added large-scale utilization of coal gangue. It achieves high-value-added resource utilization of all components of coal gangue, significantly reducing the use of traditional cementitious materials such as cement and gangue disposal costs, resulting in significant economic and environmental benefits. Attached Figure Description

[0017] Figure 1 This is a flowchart of the method for preparing all-component coal gangue concrete according to the present invention.

[0018] In the diagram, 1. Mineral sorting system, 2. Activation and calcination system, 3. Grinding and forming system, 4. Intelligent batching system, and 5. Mixing and stirring system. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0020] The all-component coal gangue concrete preparation system provided by this invention, such as Figure 1As shown, the system includes a screening machine connected to a No. 1 fine waste gangue bin. The screening machine is also sequentially connected to a mineral sorting system 1, a crusher, an activation and calcination system 2, a grinding and material processing system 3, and an intelligent batching system 4. The mineral sorting system 1 is also sequentially connected to another crusher and a three-stage screening machine, which is connected to the No. 1 fine waste gangue bin. The three-stage screening machine is also connected to a No. 2 medium waste gangue bin and a No. 3 coarse waste gangue bin. The No. 1 fine waste gangue bin, the No. 2 medium waste gangue bin, and the No. 3 coarse waste gangue bin are all connected to the intelligent batching system. The material feeding system 4 is connected to the intelligent batching system 4, which is connected to the mixing and stirring system 5; the first discharge end of the screening machine is connected to the No. 1 fine material gangue bin, the second discharge end of the screening machine is connected to the mineral sorting system 1, the first discharge end of the mineral sorting system 1 is connected to the crusher, and the second discharge end of the mineral sorting system 1 is connected to another crusher; the discharge end of the tertiary screening machine is connected to the No. 1 fine material gangue bin; it also includes a return conveyor belt, one end of which is connected to the oversized material discharge end of the tertiary screening machine. One end of the conveyor belt connected to the discharge end of the oversized material of the three-stage screening machine is located on the side of the three-stage screening machine away from the feed end of the other crusher. The other end of the return conveyor belt is connected to the feed end of the other crusher. The section of the return conveyor belt connected to the feed end of the other crusher is located on the side of the other crusher near the discharge end of the mineral sorting system 1. The outer wall of the activation and calcination system 2 is provided with a temperature control interface and also includes a temperature adjustment component. The connection end of the temperature adjustment component is detachably connected to the temperature control interface. The temperature adjustment component is located on the side of the activation and calcination system 2 near the discharge end of the crusher. The temperature adjustment component and the discharge end of the activation and calcination system 2 are diagonally distributed. The top of the intelligent batching system 4 is provided with a signal receiving interface and also includes a parameter input module for easy parameter setting. The signal output end of the parameter input module is connected to the signal receiving interface through a wire. The parameter input module is installed on the side of the intelligent batching system 4 near the feed end of the mixing and stirring system 5. The parameter input module is located adjacent to the material feed end of the intelligent batching system 4. Example 1 The all-component coal gangue concrete preparation system proposed in this embodiment, such as... Figure 1 As shown, the system includes a screening machine connected to a No. 1 fine gangue bin. The screening machine is also connected in sequence to a mineral sorting system 1, a crusher, an activation and calcination system 2, a grinding and material processing system 3, and an intelligent batching system 4. The mineral sorting system 1 is also connected in sequence to another crusher and a three-stage screening machine. The three-stage screening machine is connected to the No. 1 fine gangue bin. The three-stage screening machine is also connected to the No. 2 medium gangue bin and the No. 3 coarse gangue bin. The No. 1 fine gangue bin, the No. 2 medium gangue bin, and the No. 3 coarse gangue bin are all connected to the intelligent batching system 4. The intelligent batching system 4 is connected to a mixing and stirring system 5.

[0021] Example 2 The all-component coal gangue concrete preparation system proposed in this embodiment, such as... Figure 1As shown, the system includes a screening machine connected to a No. 1 fine material gangue bin. The screening machine is also sequentially connected to a mineral sorting system 1, a crusher, an activation and calcination system 2, a grinding and material preparation system 3, and an intelligent batching system 4. The mineral sorting system 1 is also sequentially connected to another crusher and a three-stage screening machine, which is connected to the No. 1 fine material gangue bin. The three-stage screening machine is also connected to a No. 2 medium material gangue bin and a No. 3 coarse material gangue bin. The No. 1 fine material gangue bin and the No. 2... The intermediate material gangue bin and the No. 3 coarse material gangue bin are both connected to the intelligent batching system 4, which is connected to the mixing and stirring system 5; the first discharge end of the screening machine is connected to the No. 1 fine material gangue bin, the second discharge end of the screening machine is connected to the mineral sorting system 1, the first discharge end of the mineral sorting system 1 is connected to the crusher, and the second discharge end of the mineral sorting system 1 is connected to another crusher; the discharge end of the tertiary screening machine is connected to the No. 1 fine material gangue bin.

[0022] Example 3 The all-component coal gangue concrete preparation system proposed in this embodiment, such as... Figure 1 As shown, the system includes a screening machine connected to a No. 1 fine waste gangue bin. The screening machine is also sequentially connected to a mineral sorting system 1, a crusher, an activation and calcination system 2, a grinding and material processing system 3, and an intelligent batching system 4. The mineral sorting system 1 is also sequentially connected to another crusher and a three-stage screening machine, which is connected to the No. 1 fine waste gangue bin. The three-stage screening machine is also connected to a No. 2 medium waste gangue bin and a No. 3 coarse waste gangue bin. The No. 1 fine waste gangue bin, the No. 2 medium waste gangue bin, and the No. 3 coarse waste gangue bin are all connected to the intelligent batching system 4, which is connected to a mixing and stirring system 5. The first discharge end of the screening machine is connected to the No. 1 fine waste gangue bin, and the second discharge end of the screening machine... The material end is connected to the mineral sorting system 1. The first discharge end of the mineral sorting system 1 is connected to the crusher. The second discharge end of the mineral sorting system 1 is connected to another crusher. The discharge end of the three-stage screening machine is connected to the No. 1 fine material gangue bin. It also includes a return belt. One end of the return belt is connected to the oversized material discharge end of the three-stage screening machine. The end of the return belt connected to the oversized material discharge end of the three-stage screening machine is located on the side of the three-stage screening machine away from the feed end of the other crusher. The other end of the return belt is connected to the feed end of the other crusher. The section of the return belt connected to the feed end of the other crusher is located on the side of the other crusher close to the discharge end of the mineral sorting system 1.

[0023] Example 4 The all-component coal gangue concrete preparation system proposed in this embodiment, such as... Figure 1As shown, the system includes a screening machine connected to a No. 1 fine waste gangue bin. The screening machine is also sequentially connected to a mineral sorting system 1, a crusher, an activation and calcination system 2, a grinding and material processing system 3, and an intelligent batching system 4. The mineral sorting system 1 is also sequentially connected to another crusher and a three-stage screening machine. The three-stage screening machine is connected to the No. 1 fine waste gangue bin, and is also connected to a No. 2 medium waste gangue bin and a No. 3 coarse waste gangue bin. The No. 1 fine waste gangue bin, the No. 2 medium waste gangue bin, and the No. 3 coarse waste gangue bin are all connected to the intelligent batching system 4, which is connected to a mixing and stirring system 5. The first discharge end of the screening machine is connected to the No. 1 fine waste gangue bin, and the second discharge end of the screening machine is connected to the mineral sorting system 1. The first discharge end of the mineral sorting system 1 is connected to the crusher, and the second discharge end of the mineral sorting system 1 is connected to another crusher. The system includes a crusher connection; the discharge end of the three-stage screening machine is connected to the No. 1 fine material gangue bin; it also includes a return conveyor belt, one end of which is connected to the oversized material discharge end of the three-stage screening machine. The end of the return conveyor belt connected to the oversized material discharge end of the three-stage screening machine is located on the side of the three-stage screening machine away from the feed end of the other crusher, and the other end of the return conveyor belt is connected to the feed end of the other crusher. The section of the return conveyor belt connected to the feed end of the other crusher is located on the side of the other crusher near the discharge end of the mineral sorting system 1; the outer wall of the activation and calcination system 2 is provided with a temperature control interface, and also includes a temperature adjustment component. The connection end of the temperature adjustment component is detachably connected to the temperature control interface. The temperature adjustment component is located on the side of the activation and calcination system 2 near the discharge end of the crusher, and the temperature adjustment component and the discharge end of the activation and calcination system 2 are diagonally distributed.

[0024] Example 5 The all-component coal gangue concrete preparation system proposed in this embodiment, such as... Figure 1As shown, the system includes a screening machine connected to a No. 1 fine waste gangue bin. The screening machine is also sequentially connected to a mineral sorting system 1, a crusher, an activation and calcination system 2, a grinding and material processing system 3, and an intelligent batching system 4. The mineral sorting system 1 is also sequentially connected to another crusher and a three-stage screening machine, which is connected to the No. 1 fine waste gangue bin. The three-stage screening machine is also connected to a No. 2 medium waste gangue bin and a No. 3 coarse waste gangue bin. The No. 1 fine waste gangue bin, the No. 2 medium waste gangue bin, and the No. 3 coarse waste gangue bin are all connected to the intelligent batching system 4. The system includes a batching system 4, which is connected to a mixing system 5; the first discharge end of the screening machine is connected to the No. 1 fine material gangue bin, the second discharge end of the screening machine is connected to the mineral sorting system 1, the first discharge end of the mineral sorting system 1 is connected to a crusher, and the second discharge end of the mineral sorting system 1 is connected to another crusher; the discharge end of the tertiary screening machine is connected to the No. 1 fine material gangue bin; it also includes a return conveyor belt, one end of which is connected to the oversized material discharge end of the tertiary screening machine. One end of the return conveyor belt connected to the oversized material discharge end of the three-stage screening machine is located on the side of the three-stage screening machine away from the feed end of the other crusher. The other end of the return conveyor belt is connected to the feed end of the other crusher. The section of the return conveyor belt connected to the feed end of the other crusher is located on the side of the other crusher near the discharge end of the mineral sorting system 1. The outer wall of the activation and calcination system 2 is provided with a temperature control interface and also includes a temperature adjustment component. The connection end of the temperature adjustment component is detachably connected to the temperature control interface. The temperature adjustment component is located on the side of the activation and calcination system 2 near the discharge end of the crusher. The temperature adjustment component and the discharge end of the activation and calcination system 2 are diagonally distributed. The top of the intelligent batching system 4 is provided with a signal receiving interface and also includes a parameter input module. The signal output end of the parameter input module is connected to the signal receiving interface through a wire. The parameter input module is installed on the side of the intelligent batching system 4 near the feed end of the mixing and stirring system 5. The parameter input module is set adjacent to the material feed end of the intelligent batching system 4. Example 6 The method for preparing all-component coal gangue concrete proposed in this embodiment, based on the aforementioned all-component coal gangue concrete preparation system, includes the following steps: Step 1: Feed the coal gangue into the screening machine for screening; Step 2: After screening, the materials are fed into the No. 1 fine gangue bin and the mineral sorting system respectively. Step 3: The clay rock gangue separated by the sorting system is crushed by a crusher, then sent to the activation and calcination system, and then sent to the grinding and material processing system to be ground into gangue-based cementitious material. Step 4: The non-clay rock gangue separated by the sorting system is crushed by another crusher and then sent to a three-stage screening machine. After screening, it enters bins 1, 2 and 3. Step 5: Input the requirements into the intelligent batching system, and send the gangue-based cementitious material and materials from each bin to the mixing system according to the proportion, and mix with water to produce concrete.

[0025] Example 7 The method for preparing all-component coal gangue concrete proposed in this embodiment, based on the aforementioned all-component coal gangue concrete preparation system, includes the following steps: Step 1: Feed the coal gangue into the screening machine for screening; Step 2: After screening, the materials are fed into the No. 1 fine gangue bin and the mineral sorting system respectively. Specifically: coal gangue smaller than 10mm after screening enters the No. 1 fine gangue bin, and coal gangue larger than 10mm enters the mineral sorting system; Step 3: The clay rock gangue separated by the sorting system is crushed by a crusher, then sent to the activation and calcination system, and then sent to the grinding and material processing system to be ground into gangue-based cementitious material. In step 3, the calcination temperature of the activated calcination system is 800~1200℃; Step 4: The non-clay rock gangue separated by the sorting system is crushed by another crusher and then sent to a three-stage screening machine. After screening, it enters bins 1, 2 and 3. Specifically: the non-clay rock gangue separated by the mineral sorting system is crushed by another crusher and then sent to a three-stage screening machine. After screening, the material smaller than 10mm goes into bin 1, the material of 10~20mm goes into bin 2, the material of 20~30mm goes into bin 3, and the material larger than 30mm is returned to another crusher via a return conveyor belt. Step 5: Input the requirements into the intelligent batching system, and send the gangue-based cementitious material and the materials in each bin to the mixing system according to the proportion, and mix with water to make concrete; In step 5, the concrete mix ratio for the bottom paving of underground roadways is: gangue-based cementitious material: coarse material: medium material: fine material: water = 1: (1.5~2): (1~1.5): (0.5~1): (0.45~0.55); the concrete mix ratio for the side support of the goaf-retaining roadway is: gangue-based cementitious material: fine material: water = 1: (2~3): (0.4~0.5); the gangue-based cementitious material for paste filling is: medium material: fine material: water = 1: (2~2.5): (2.5~3): (1~1.5).

Claims

1. A full-component coal gangue concrete preparation system, characterized in that, Including screening machine, the screening machine is connected with No. 1 fine gangue bin, the screening machine is also connected with mineral separation system (1), crusher, activation calcination system (2), grinding material system (3) and intelligent batching system (4) in proper order;The mineral separation system (1) is also connected with another crusher and three-stage screening machine in proper order, the three-stage screening machine is connected with No. 1 fine gangue bin, and the three-stage screening machine is also connected with No. 2 medium gangue bin and No. 3 coarse gangue bin, and No. 1 fine gangue bin, No. 2 medium gangue bin and No. 3 coarse gangue bin are connected with intelligent batching system (4), and the intelligent batching system (4) is connected with mixed stirring system (5).

2. The all-in coal refuse concrete production system according to claim 1, wherein, The first discharge end of the screening machine is connected with No. 1 fine gangue bin, the second discharge end of the screening machine is connected with the mineral separation system (1), the first discharge end of the mineral separation system (1) is connected with the crusher, and the second discharge end of the mineral separation system (1) is connected with another crusher;The discharge end of the three-stage screening machine is connected with No. 1 fine gangue bin.

3. The all-inclusive coal refuse concrete production system of claim 2, wherein, It also includes a return belt, one end of the return belt is connected with the oversized material discharge end of the three-stage screening machine, the end of the return belt connected with the oversized material discharge end of the three-stage screening machine is located on the side of the three-stage screening machine away from the feed end of another crusher, the other end of the return belt is connected with the feed end of another crusher, and the section of the return belt connected with the feed end of another crusher is located on the side of another crusher close to the discharge end of the mineral separation system (1).

4. The all-inclusive coal refuse concrete production system of claim 3, wherein, A temperature control interface is arranged on the outer side wall of the activation calcination system (2), and a temperature adjusting assembly is further included, the connecting end of the temperature adjusting assembly is detachably connected with the temperature control interface, the temperature adjusting assembly is arranged on the side of the activation calcination system (2) close to the discharge end of the crusher, and the discharge end of the temperature adjusting assembly is diagonally distributed relative to the discharge end of the activation calcination system (2).

5. The all-inclusive coal refuse concrete production system of claim 4, wherein, A signal receiving interface is arranged on the top of the intelligent batching system (4), and a parameter input module is further included, the signal output end of the parameter input module is connected with the signal receiving interface through wires, the parameter input module is installed on the side of the intelligent batching system (4) close to the feed end of the mixed stirring system (5), and the parameter input module is arranged adjacent to the material feed end of the intelligent batching system (4).

6. A method for preparing a full component coal gangue concrete, characterized in that, The full-component coal gangue concrete preparation system according to claim 5 comprises the following steps: Step 1, the coal gangue is sent into the screening machine for screening; Step 2, after screening, the coal gangue is respectively sent into No. 1 fine gangue bin and the mineral separation system; Step 3, the clay rock gangue separated by the separation system is crushed by the crusher, then sent into the activation calcination system, and then sent into the grinding material system to be ground into gangue-based cementitious material; Step 4, the non-clay rock gangue separated by the separation system is crushed by another crusher, then sent into the three-stage screening machine, and then sent into No. 1 bin, No. 2 bin and No. 3 bin after screening; Step 5, the demand is input into the intelligent batching system, and the gangue-based cementitious material and the materials in each bin are sent into the mixed stirring system according to the proportioning ratio, mixed with water to obtain concrete.

7. The all-inclusive coal refuse concrete production method according to claim 6, characterized in that, The step 2 is specifically: the coal gangue less than 10 mm after screening is sent into the No. 1 fine gangue bin, and the coal gangue more than 10 mm is sent into the mineral separation system.

8. The all-inclusive coal refuse concrete production method according to claim 7, characterized in that, In the step 3, the calcining temperature of the activated calcining system is 800-1200 ℃.

9. The all-inclusive coal refuse concrete production method according to claim 8, characterized in that, The step 4 is specifically: the non-clay rock gangue separated by the mineral separation system is crushed by another crusher, and then is sent into a three-stage screening machine, and the gangue less than 10 mm after screening is sent into the No. 1 bin, the gangue of 10-20 mm is sent into the No. 2 bin, the gangue of 20-30 mm is sent into the No. 3 bin, and the gangue more than 30 mm is sent back to the other crusher by a return belt.

10. The all-inclusive coal refuse concrete production method according to claim 9, characterized in that, In the step 5, the concrete for the bottom of the underground roadway is mixed in a ratio of: gangue-based cementitious material: coarse material: medium material: fine material: water = 1: (1.5-2): (1-1.5): (0.5-1): (0.45-0.55); the concrete for the support of the roadway beside the gob-side entry is mixed in a ratio of: gangue-based cementitious material: fine material: water = 1: (2-3): (0.4-0.5); and the gangue-based cementitious material for the paste filling body is mixed in a ratio of: gangue-based cementitious material: medium material: fine material: water = 1: (2-2.5): (2.5-3): (1-1.5).

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