Underground coal mine multi-platform slurry filling system arrangement method

Abstract

The invention discloses an underground coal mine multi-platform type slurry filling system arrangement method. The method comprises the steps that 1, an underground coal mine inclined roadway is selected; step 2, determining a slurry filling and conveying system including gangue crushing, material conveying, stirring and pulping and slurry pumping in the roadway; 3, a dust removal system is determined according to the roadway airflow direction; 4, determining a power distribution system according to a power source direction; and 5, arranging a plurality of platforms in the roadway according to the association of the equipment sizes and functions of the slurry filling and conveying system, the dust removal system and the power distribution system, and arranging the multi-platform type slurry filling system on the platforms according to the system steps. According to the arrangement method for the underground multi-platform slurry filling system of the coal mine, the problems that due to the fact that the slurry filling system is arranged in a horizontal roadway without a gradient in a traditional arrangement mode, the size of the section of the roadway at the equipment arrangement position is too large, the roadway heaves and deforms, and a top plate collapses are solved.

Description

Technical Field

[0001] This invention belongs to the field of slurry filling technology, specifically relating to the layout method of a multi-platform slurry filling system in underground coal mines. Background Technology

[0002] Coal gangue is the main solid waste generated during the tunneling, mining, stripping, and washing processes in coal mines. The traditional method of coal gangue disposal is to hoist it to the surface and stockpile it. However, large-scale surface stockpiling of coal gangue forms characteristic gangue mountains in coal mines, posing a significant threat and damage to the ecological environment. Pure gangue is generated during the excavation of underground pure rock roadways or the removal of rock floor slabs. Transporting this underground gangue to the surface increases both the mine's transportation and hoisting costs and the cost of disposing of it on the surface. Therefore, using a slurry backfilling process to fill underground gangue in situ into the goaf can reduce mine production costs and improve the mine's overall economic efficiency and sustainable development capabilities.

[0003] Coal mine underground production is constrained by surrounding rock conditions and ground pressure, with roadway cross-sections generally not exceeding 4m in height and 5m in width. The slurry filling process system includes gangue crushing, transportation, mixing and slurry preparation, and pumping. The system equipment mainly consists of large-sized devices such as crushers, mixers, and industrial plunger pumps for slurry filling. Traditional layouts place the slurry filling system equipment in horizontal roadways without slope, resulting in excessively large roadway cross-sections at the equipment locations. This further leads to potential safety hazards such as roadway floor deformation and roof collapse, impacting mine safety. Summary of the Invention

[0004] The purpose of this invention is to provide a method for arranging multi-platform slurry filling systems in underground coal mines, which solves the problem that the traditional method of arranging the slurry filling system in a horizontal roadway without slope leads to an excessively large roadway cross-section at the location of the equipment, resulting in roadway floor deformation and roof collapse.

[0005] The technical solution adopted in this invention is a method for arranging a multi-platform slurry filling system in underground coal mines, comprising the following steps: Step 1: Select an inclined roadway in the coal mine; Step 2: Based on the inclined roadway, determine the slurry filling and conveying system within the roadway, which includes gangue crushing, material transportation, mixing and slurry preparation, and slurry pumping. Step 3: After the conveying system is determined, determine the dust removal system according to the airflow direction in the tunnel; Step 4: After the dust removal system is determined, determine the power distribution system according to the direction of the power source; Step 5: In the tunnel, based on the equipment size and functional relationship of the slurry filling and conveying system, dust removal system, and power distribution system, set up several platforms and place the above system steps on the platforms to complete the layout of the multi-platform slurry filling system.

[0006] The invention is further characterized by: In step 1, the slope of the inclined tunnel is 5~15°, and the length of the inclined tunnel is not less than 100m.

[0007] Step 2: The material transport equipment in the slurry filling and conveying system adopts a belt conveyor or a scraper conveyor.

[0008] In step 3, the dust removal system equipment is arranged upwind of the airflow in the tunnel.

[0009] In step 4, the power distribution system is arranged in the direction of the power source in the inclined roadway.

[0010] Step 5 includes several platforms, including a crushing equipment platform, a grinding equipment platform, a mixing equipment platform, and a pumping equipment platform. The arrangement order of these platforms is: crushing equipment platform, grinding equipment platform, mixing equipment platform, and pumping equipment platform.

[0011] Each stage of the crushing equipment is arranged on a separate platform; the grinding equipment is arranged on a separate platform; the mixing equipment and the pumping equipment are arranged together on the same platform.

[0012] In step 5, the dust removal system and the power distribution system can be arranged separately or together with the slurry filling and conveying system on one platform.

[0013] In step 5, when both the power distribution system and the dust removal system are located at the same end of the inclined roadway, either on or below the slope, the power distribution system is arranged outside the dust removal system.

[0014] In step 5, there are 6 to 8 platforms, which are arranged sequentially from the top of the slope to the bottom along the inclined roadway.

[0015] The beneficial effects of this invention are: The method for arranging a multi-platform slurry filling system in underground coal mines provided by this invention achieves a reasonable arrangement of slurry filling system equipment, making more rational use of underground roadway space, avoiding extensive excavation of underground roadways, reducing the cross-sectional area of ​​equipment chambers, and reducing the large cross-sectional size caused by the arrangement of large equipment in underground roadways by setting up several small platforms in inclined roadways, thus ensuring safe production in the mine. This arrangement method can be promoted and applied in the underground arrangement of slurry filling systems and similar systems in coal mines. Attached Figure Description

[0016] Figure 1This is a flowchart of the layout method of the multi-platform slurry filling system in underground coal mines according to the present invention; Figure 2 This is a schematic diagram of the horizontal slurry filling system layout in Embodiment 7 of the present invention; Figure 3 This is a schematic diagram of the layout of the multi-platform slurry filling system in Embodiment 7 of the present invention. Figure 4 This is a cross-sectional view of the roadway orientation of the horizontal slurry filling system layout method in Embodiment 7 of the present invention; Figure 5 This is a cross-sectional view of the roadway orientation of the multi-platform slurry filling system layout method in Embodiment 7 of the present invention; Figure 6 This is a schematic diagram of the slurry filling system layout in Embodiment 8 of the present invention; In the diagram, 1. Dust removal equipment, 2. Primary crusher, 3. Secondary crusher, 4. One belt conveyor, 5. Tertiary crusher, 6. Two belt conveyors, 7. Powder buffer silo, 8. Three belt conveyors, 9. Paddle mixer, 10. Spiral mixer, 11. Filling industrial plunger pump, 12. Power distribution equipment, 13. Tunnel roof, 14. Original tunnel floor, 15. Excavated area of ​​original tunnel floor, 16. Excavated area of ​​tunnel floor, 17. One scraper conveyor, 18. Two scraper conveyors, 19. Three scraper conveyors, 20. Horizontal buffer silo, 21. Four scraper conveyors, 22. Wet ball mill, 23. Mixing tank. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0018] Example 1 The proposed layout method for a multi-platform slurry filling system in underground coal mines in this embodiment is as follows: Figure 1 As shown, it includes the following steps: Step 1: Select an inclined roadway in the coal mine; Step 2: Based on the inclined roadway, determine the slurry filling and conveying system within the roadway, which includes gangue crushing, material transportation, mixing and slurry preparation, and slurry pumping. Step 3: After the conveying system is determined, determine the dust removal system according to the airflow direction in the tunnel; Step 4: After the dust removal system is determined, determine the power distribution system according to the direction of the power source; Step 5: In the tunnel, based on the equipment size and functional relationship of the slurry filling and conveying system, dust removal system, and power distribution system, set up several platforms and place the above system steps on the platforms to complete the layout of the multi-platform slurry filling system.

[0019] Example 2 The proposed layout method for a multi-platform slurry filling system in underground coal mines in this embodiment is as follows: Figure 1 As shown, it includes the following steps: Step 1: Select an inclined roadway in the coal mine; In step 1, the slope of the inclined roadway is 5~15°, and the length of the inclined roadway is not less than 100m; Step 2: Based on the inclined roadway, determine the slurry filling and conveying system within the roadway, which includes gangue crushing, material transportation, mixing and slurry preparation, and slurry pumping. Step 3: After the conveying system is determined, determine the dust removal system according to the airflow direction in the tunnel; Step 4: After the dust removal system is determined, determine the power distribution system according to the direction of the power source; Step 5: In the tunnel, based on the equipment size and functional relationship of the slurry filling and conveying system, dust removal system, and power distribution system, set up several platforms and place the above system steps on the platforms to complete the layout of the multi-platform slurry filling system.

[0020] Example 3 The proposed layout method for a multi-platform slurry filling system in underground coal mines in this embodiment is as follows: Figure 1 As shown, it includes the following steps: Step 1: Select an inclined roadway in the coal mine; In step 1, the slope of the inclined roadway is 5~15°, and the length of the inclined roadway is not less than 100m; Step 2: Based on the inclined roadway, determine the slurry filling and conveying system within the roadway, which includes gangue crushing, material transportation, mixing and slurry preparation, and slurry pumping. Step 2: The material transport equipment in the slurry filling and conveying system adopts a belt conveyor or a scraper conveyor; Step 3: After the conveying system is determined, determine the dust removal system according to the airflow direction in the tunnel; Step 4: After the dust removal system is determined, determine the power distribution system according to the direction of the power source; Step 5: In the tunnel, based on the equipment size and functional relationship of the slurry filling and conveying system, dust removal system, and power distribution system, set up several platforms and place the above system steps on the platforms to complete the layout of the multi-platform slurry filling system.

[0021] Example 4 The proposed layout method for a multi-platform slurry filling system in underground coal mines in this embodiment is as follows: Figure 1 As shown, it includes the following steps: Step 1: Select an inclined roadway in the coal mine; In step 1, the slope of the inclined roadway is 5~15°, and the length of the inclined roadway is not less than 100m; Step 2: Based on the inclined roadway, determine the slurry filling and conveying system within the roadway, which includes gangue crushing, material transportation, mixing and slurry preparation, and slurry pumping. Step 2: The material transport equipment in the slurry filling and conveying system adopts a belt conveyor or a scraper conveyor; Step 3: After the conveying system is determined, determine the dust removal system according to the airflow direction in the tunnel; In step 3, the dust removal system equipment is arranged upwind of the airflow in the tunnel; Step 4: After the dust removal system is determined, determine the power distribution system according to the direction of the power source; Step 5: In the tunnel, based on the equipment size and functional relationship of the slurry filling and conveying system, dust removal system, and power distribution system, set up several platforms and place the above system steps on the platforms to complete the layout of the multi-platform slurry filling system.

[0022] Example 5 The proposed layout method for a multi-platform slurry filling system in underground coal mines in this embodiment is as follows: Figure 1 As shown, it includes the following steps: Step 1: Select an inclined roadway in the coal mine; In step 1, the slope of the inclined roadway is 5~15°, and the length of the inclined roadway is not less than 100m; Step 2: Based on the inclined roadway, determine the slurry filling and conveying system within the roadway, which includes gangue crushing, material transportation, mixing and slurry preparation, and slurry pumping. Step 2: The material transport equipment in the slurry filling and conveying system adopts a belt conveyor or a scraper conveyor; Step 3: After the conveying system is determined, determine the dust removal system according to the airflow direction in the tunnel; In step 3, the dust removal system equipment is arranged upwind of the airflow in the tunnel; Step 4: After the dust removal system is determined, determine the power distribution system according to the direction of the power source; In step 4, the power distribution system is arranged in the direction of the power source in the inclined roadway; Step 5: In the tunnel, based on the equipment size and functional relationship of the slurry filling and conveying system, dust removal system, and power distribution system, set up several platforms and place the above system steps on the platforms to complete the layout of the multi-platform slurry filling system.

[0023] Example 6 The proposed layout method for a multi-platform slurry filling system in underground coal mines in this embodiment is as follows: Figure 1 As shown, it includes the following steps: Step 1: Select an inclined roadway in the coal mine; In step 1, the slope of the inclined roadway is 5~15°, and the length of the inclined roadway is not less than 100m; Step 2: Based on the inclined roadway, determine the slurry filling and conveying system within the roadway, which includes gangue crushing, material transportation, mixing and slurry preparation, and slurry pumping. Step 2: The material transport equipment in the slurry filling and conveying system adopts a belt conveyor or a scraper conveyor; Step 3: After the conveying system is determined, determine the dust removal system according to the airflow direction in the tunnel; In step 3, the dust removal system equipment is arranged upwind of the airflow in the tunnel; Step 4: After the dust removal system is determined, determine the power distribution system according to the direction of the power source; In step 4, the power distribution system is arranged in the direction of the power source in the inclined roadway; Step 5: In the roadway, based on the equipment size and functional relationship of the slurry filling and conveying system, dust removal system, and power distribution system, set up several platforms and place the above system steps on the platforms to complete the layout of the multi-platform slurry filling system. In step 5, the platforms include a crushing equipment platform, a grinding equipment platform, a mixing equipment platform, and a pumping equipment platform. The arrangement order of the platforms is: crushing equipment platform, grinding equipment platform, mixing equipment platform, and pumping equipment platform. Each stage of the crushing equipment is arranged on a separate platform; the grinding equipment is arranged on a separate platform; the mixing equipment and the pumping equipment are arranged on the same platform. In step 5, the dust removal system and the power distribution system can be arranged separately or together with the slurry filling and conveying system on one platform; In step 5, when both the power distribution system and the dust removal system are located at the same end of the inclined roadway, either on or below the slope, the power distribution system is arranged outside the dust removal system. In step 5, there are 6 to 8 platforms, which are arranged sequentially from the top of the slope to the bottom along the inclined roadway.

[0024] Example 7 This embodiment proposes a multi-platform slurry filling system layout method for the Huangling No. 2 Coal Mine, with a gangue processing capacity of 200,000 tons per year. The processing technology involves crushing the gangue into gangue powder with a particle size no larger than 3 mm, adding water and stirring to form a high-concentration gangue slurry, wherein the gangue particles no larger than 3 mm account for no less than 70% by mass. The prepared high-concentration gangue slurry is then transported to the underground goaf area for filling using a filling industrial plunger pump. Traditional layout methods include... Figure 2 As shown, the technical solution of this invention includes the following steps: A 110m long inclined underground roadway with a 7° slope was selected, and the upper part of the roadway was horizontal. Figure 3 As shown; Adopted and Figure 2The same slurry filling process is shown, which consists of three stages of crushing, two stages of mixing, and one stage of pumping. The three stages of crushing equipment are a primary crusher 2, a secondary crusher 3, and a tertiary crusher 5. The primary crusher 2 is a through-type crusher, the secondary crusher 3 is a toothed roller crusher, and the tertiary crusher 5 is a cage crusher. The mixing method is two-stage continuous mixing. The primary mixing equipment is a paddle mixer 9, and the secondary mixing equipment is a spiral mixer 10. The paddle mixer 9 is a paddle twin-shaft mixer, and the spiral mixer 10 is a spiral twin-shaft mixer. The primary pumping equipment is a filling industrial plunger pump 11, with two units, one in use and one on standby. The material is transferred between belt conveyors, with one belt conveyor 4, two belt conveyors 6, and three belt conveyors 8. The airflow direction in the tunnel is from uphill to downhill, therefore the dust removal equipment 1 is arranged on the slope; The power source is located on the slope, therefore the power distribution equipment 12 is arranged on the slope and outside the dust removal equipment 1; like Figure 3 As shown, six platforms are set up according to the slurry filling system process, arranged sequentially from the top of the slope to the bottom. The first platform is equipped with power distribution equipment 12 and dust removal equipment 1; the second platform is equipped with a primary crusher 2; the third platform is equipped with a secondary crusher 3 and a belt conveyor 4; the fourth platform is equipped with a tertiary crusher 5 and two belt conveyors 6; the fifth platform is equipped with a powder buffer silo 7 and three belt conveyors 8; and the sixth platform is equipped with a paddle mixer 9 and a spiral mixer 10. At the same time, two filling industrial plunger pumps 11 are arranged below the paddle mixer 9 and the spiral mixer 10. The roadway orientation of the horizontal slurry filling system layout method in Huangling No. 2 Coal Mine is as follows: Figure 4 As shown, the increased excavation volume in the tunnel floor excavation area is 1807 m³. 3 The distance where the roadway height exceeds 8.5m after excavation is 37.2m; the roadway orientation of the multi-platform slurry filling system layout method in Huangling No. 2 Coal Mine is as follows: Figure 5 As shown, compared to the original roadway, both the roadway roof slab 13 and the original roadway floor slab 14 are inclined. The original roadway floor slab excavation area 15 has a long strip cross section, while the roadway floor slab excavation area 16, using the existing method, has a stepped cross section. The excavation volume of the roadway floor slab excavation area 16 is increased by 1540.5 m³. 3 The distance where the tunnel height exceeds 8.5m after excavation is 17.1m.

[0025] Compared to traditional horizontal layout methods, this approach offers the following technical advantages: it shortens the length of high-altitude roadways; by adopting the underground multi-platform slurry filling system, the length of roadways exceeding 8.5m is reduced by 20.1m, and the overall excavation volume is reduced by 356.5m³. 3This greatly reduces the excavation volume of the original roadway and saves on excavation work. Similarly, the layout method of the multi-platform slurry filling system in coal mines of this invention makes it easier to maintain the long-term stability of the roadway under high ground pressure and high stress environments.

[0026] Example 8 The proposed arrangement method for the multi-platform slurry filling system in the Hujiahe Coal Mine in this embodiment has a gangue processing capacity of 200,000 tons per year. The gangue is crushed and ground into gangue powder with a particle size no larger than 1 mm, then mixed with water to form a gangue slurry with a mass concentration of 70%. This slurry is then transported to the underground goaf area for filling using an industrial plunger pump. The specific implementation of this invention is as follows: Select a 120m long inclined underground roadway with a slope of 5°. Figure 6 As shown; The slurry filling process consists of two-stage crushing, one-stage grinding, one-stage mixing, and one-stage pumping. The two-stage crushing equipment includes a primary toothed roller crusher and a secondary toothed roller crusher. The primary grinding equipment is a wet ball mill (22). The primary mixing equipment is a mixing tank (23). The primary pumping equipment is a filling industrial plunger pump, with one unit. Material transfer between stages is achieved using scraper conveyors, with one scraper conveyor (17), two scraper conveyors (18), three scraper conveyors (19), and four scraper conveyors (21). The airflow direction in the tunnel is from uphill to downhill, therefore the dust removal equipment 1 is arranged on the slope; Since the power source is located downhill, the power distribution equipment 12 is located downhill. like Figure 6 As shown, six platforms are set up according to the slurry filling system process, arranged sequentially from the top of the slope to the bottom of the slope; the first platform is equipped with dust removal equipment 1 and a primary toothed roller crusher, the second platform is equipped with a secondary toothed roller crusher, the third platform is equipped with a horizontal buffer bin 20, the fourth platform is equipped with a wet ball mill 22, the fifth platform is equipped with a mixing tank and a filling industrial plunger pump, and the sixth platform is equipped with power distribution equipment 12.

[0027] The application of this method to the layout of multi-platform slurry filling systems in underground coal mines demonstrates its scalability. It can be applied to the layout of gangue slurry filling systems and similar gangue disposal systems in underground coal mines, reducing the excavation area and actual height of roadways, which is beneficial to roadway stability and maintenance.

Claims

1. A method for arranging a multi-platform slurry filling system in underground coal mines, characterized in that, Includes the following steps: Step 1: Select an inclined roadway in the coal mine; Step 2: Based on the inclined roadway, determine the slurry filling and conveying system within the roadway, which includes gangue crushing, material transportation, mixing and slurry preparation, and slurry pumping. Step 3: After the conveying system is determined, determine the dust removal system according to the airflow direction in the tunnel; Step 4: After the dust removal system is determined, determine the power distribution system according to the direction of the power source; Step 5: In the tunnel, based on the equipment size and functional relationship of the slurry filling and conveying system, dust removal system, and power distribution system, set up several platforms and place the above system steps on the platforms to complete the layout of the multi-platform slurry filling system.

2. The method for arranging a multi-platform slurry filling system in underground coal mines according to claim 1, characterized in that, The slope of the inclined tunnel mentioned in step 1 is 5~15°, and the length of the inclined tunnel is not less than 100m.

3. The method for arranging a multi-platform slurry filling system in underground coal mines according to claim 1, characterized in that, The material transport equipment in the slurry filling and conveying system described in step 2 is a belt conveyor or a scraper conveyor.

4. The method for arranging a multi-platform slurry filling system in underground coal mines according to claim 1, characterized in that, The dust removal system equipment described in step 3 is arranged upwind of the airflow in the tunnel.

5. The method for arranging a multi-platform slurry filling system in underground coal mines according to claim 1, characterized in that, In step 4, the power distribution system is arranged in the direction of the power source in the inclined roadway.

6. The method for arranging a multi-platform slurry filling system in underground coal mines according to claim 1, characterized in that, The platforms mentioned in step 5 include a crushing equipment platform, a grinding equipment platform, a mixing equipment platform, and a pumping equipment platform. The arrangement order of the platforms is: crushing equipment platform, grinding equipment platform, mixing equipment platform, and pumping equipment platform.

7. The method for arranging a multi-platform slurry filling system in underground coal mines according to claim 6, characterized in that, Each stage of the crushing equipment is arranged on a separate platform; the grinding equipment is arranged on a separate platform; and the mixing equipment and the pumping equipment are arranged on the same platform.

8. The method for arranging a multi-platform slurry filling system in underground coal mines according to claim 1, characterized in that, The dust removal system and power distribution system mentioned in step 5 can be arranged separately or together with the slurry filling and conveying system on a single platform.

9. The method for arranging a multi-platform slurry filling system in underground coal mines according to claim 1, characterized in that, When both the power distribution system and the dust removal system mentioned in step 5 are located at the same end of the inclined roadway, either on or below the slope, the power distribution system is arranged outside the dust removal system.

10. The method for arranging a multi-platform slurry filling system in underground coal mines according to claim 1, characterized in that, The number of platforms mentioned in step 5 is 6 to 8, and the platforms are arranged sequentially from the top of the slope to the bottom of the slope along the inclined roadway.

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