A reinforcement slurry long-distance transportation transfer system and method

Abstract

The present invention provides a long-distance transfer and transportation system and method for reinforcement slurry. The system comprises: a cement feeder connected to the cement feed ports of two slurry mixing barrels through a three-way distributor; a pumping equipment feed port connected to the discharge ports of the two slurry mixing barrels through a discharge tee; a grouting pump connected to the slurry mixing barrel; a main water supply pipeline connected to the water inlets of the two slurry mixing barrels; and a main slurry supply pipeline connected to the slurry inlets of the two slurry mixing barrels; a method comprising: alternately using the two slurry mixing barrels to prepare a mixed slurry; alternately transporting the prepared mixed slurry to the slurry mixing barrels; and utilizing the grouting pump to transport the reinforcement slurry to the grouting borehole. The system and method can effectively shorten the cement transportation time in the pipeline, reduce the probability of pipe blockage accidents, and effectively improve the efficiency of floor grouting reinforcement, which is of great significance for the management of water hazards in the floor of a coal mine working face.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mine water hazard prevention and control, and particularly relates to a reinforcement slurry long-distance transportation transfer system and method. Background Art

[0002] As my country's basic energy source, coal has an irreplaceable position in the development of the national economy. It is estimated that the proportion of coal consumption will still be above 50% by 2030. In the future, coal will still be the main source of energy supply in my country. Therefore, it is crucial to effectively ensure the safe and efficient production of coal mines. However, mine water hazards, one of the five major disasters in coal mines, have always threatened the safe and efficient production of coal mines.

[0003] As a method of coal mine water hazard control, floor grouting reinforcement has become a widely used floor slab water hazard prevention method at present because of its simple construction process, easy operation, low cost and excellent reinforcement effect. The working face floor slab grouting reinforcement has two main functions: (1) After the floor slab grouting reinforcement slurry enters the floor slab cracks, the cracks can be sutured, so that the floor slab can form a whole; (2) The slurry diffuses into the cracks to seal the cracks, reinforce the floor slab, cut off the hydraulic connection between the pressurized water and the coal seam, and prevent groundwater from flowing in, thereby avoiding the occurrence of floor slab water inrush accidents. At present, floor slab grouting reinforcement also faces the problems of difficulty in long-distance slurry transportation and easy precipitation and pipe blockage. Especially when the yellow mud slurry is used, cement needs to be added to the yellow mud slurry. Due to the short solidification time of cement, the cement will be transported in the pipeline for a long time during the long-distance transportation of slurry, and precipitation and pipe blockage often occur. This not only reduces the efficiency of floor grouting reinforcement, but also increases the cost of pipeline cleaning. Summary of the Invention

[0004] To address the aforementioned issues with the existing technologies, the present invention provides a system and method for long-distance transport and transfer of reinforcement slurry. This system effectively shortens cement delivery time in pipelines, reduces the probability of pipe blockages, and improves the efficiency of floor grouting reinforcement, significantly impacting the management of floor flooding in coal mine working faces. The method features simple steps and a high degree of automation, facilitating the stable, long-distance delivery of mixed slurry.

[0005] In order to achieve the above-mentioned object, the present invention provides a long-distance transportation and transfer system for reinforcement slurry, comprising a cement feeder, a slurry mixing barrel, a pumping device, a slurry storage and mixing barrel, a grouting pump, a main water supply pipeline, a main slurry supply pipeline and an electric control cabinet;

[0006] The cement feeder, slurry mixing barrel, pumping equipment, slurry storage mixing barrel, grouting pump and electric control cabinet are all arranged in the tunnel;

[0007] The discharge port of the cement feeder is connected to the feed port of the three-way distributor, and the two discharge ports of the three-way distributor are respectively connected to the electric control valve seven and the electric control valve eight;

[0008] The slurry mixing barrel is used to prepare mixed slurry, and is provided with a cement feed port, a water inlet and a slurry inlet on the top, and a discharge port on the bottom; there are two slurry mixing barrels, which are arranged side by side below the discharge port of the cement feeder; the cement feed ports of the two slurry mixing barrels are respectively connected to the two discharge ports of the three-way distributor;

[0009] The feed port of the pumping device is connected to the discharge port of the discharge tee, the first feed port of the discharge tee is connected to the discharge port of the first slurry mixing barrel through the first branch feed pipeline, the second feed port of the discharge tee is connected to the discharge port of the second slurry mixing barrel through the second branch feed pipeline, and the discharge port of the pumping device is connected to the feed port of the slurry storage mixing barrel through the pumping discharge pipeline; the first branch feed pipeline and the second branch feed pipeline are respectively connected in series with the electric control valve five and the electric control valve six;

[0010] The feed port of the grouting pump is connected to the discharge port of the slurry storage and mixing barrel through a grouting feed pipeline, and the discharge port is connected to a grouting discharge pipeline;

[0011] The water inlet end of the main water supply pipeline is connected to the water source, a flow meter 1 is connected in series in the middle thereof, and the water outlet end thereof is connected to the water inlet of the water supply tee, the first water outlet of the water supply tee is connected to the water inlet of the first pulping and mixing barrel through the first branch water supply pipeline, and the second water outlet of the water supply tee is connected to the water inlet of the second pulping and mixing barrel through the second branch water supply pipeline; the first branch water supply pipeline and the second branch water supply pipeline are respectively connected in series with an electric control valve 1 and an electric control valve 2;

[0012] The feed end of the main slurry delivery pipeline is connected to the slurry delivery pipeline, a flow meter 2 is connected in series in the middle thereof, and the discharge end is connected to the feed port of the feed tee, the first discharge port of the feed tee is connected to the slurry inlet of the first slurry mixing barrel through the first branch slurry delivery pipeline, and the second discharge port of the feed tee is connected to the slurry inlet of the second slurry mixing barrel through the second branch slurry delivery pipeline; the first branch slurry delivery pipeline and the second branch slurry delivery pipeline are respectively connected in series with the electric control valve 3 and the electric control valve 4; the slurry delivery pipeline is connected to the equipment for preparing yellow mud slurry on the ground, so as to transport the prepared yellow mud slurry to the underground;

[0013] The electric control cabinet is respectively connected to the cement feeder, slurry mixing barrel, pumping equipment, slurry storage mixing barrel, grouting pump, electric control valve one, electric control valve two, electric control valve three, electric control valve four, electric control valve five, electric control valve six, electric control valve seven and electric control valve eight.

[0014] As a preference, the electric control cabinet, cement loader, slurry mixing barrel, pumping equipment, slurry storage mixing barrel and grouting pump are arranged in sequence along the length direction of the tunnel.

[0015] The transfer system in the present invention is mainly composed of a cement feeder, a slurry mixing barrel, a pumping device, a slurry storage mixing barrel and a grouting pump, and they are connected to each other by pipelines. In this way, each device can be flexibly arranged at a suitable position in the underground tunnel according to different working conditions. Since the slurry mixing barrel for preparing the mixed slurry is located underground, it is only necessary to transport the yellow mud slurry prepared on the ground to the underground and then mix and stir it with cement and water in the slurry mixing barrel. This effectively realizes the system separation of the yellow mud slurry prepared on the ground and the mixed slurry prepared underground, thereby shortening the transportation time of the mixed slurry in the pipeline. Since the slurry storage mixing barrel has a self-stirring function, it can not only store the prepared mixed slurry, but also continuously stir the stored slurry, thereby effectively preventing the slurry from settling and clogging the pipe, and is conducive to ensuring a continuous and stable supply of reinforcement slurry. By arranging two slurry mixing barrels side by side, the mixed slurry of yellow mud slurry and cement can be prepared in turn. In this way, the continuous preparation of slurry can be achieved and the continuous and stable supply of reinforcement grouting can be guaranteed. The two slurry mixing barrels are connected respectively by a three-way distributor, and the two discharge ports of the three-way distributor are respectively provided with electric-controlled valves seven and eight, which can conveniently transport cement to different slurry mixing barrels according to different situations; the two branch water supply pipelines connected to the main water supply pipeline are respectively connected to the two slurry mixing barrels, and are respectively provided with electric-controlled valves one and two, which can conveniently transport water to different slurry mixing barrels according to different situations; the two branch slurry pipelines connected to the main slurry pipeline are respectively connected to the two slurry mixing barrels, and are respectively provided with electric-controlled valves three and four, which can conveniently transport water to different slurry mixing barrels according to different situations; the pumping equipment is respectively connected to the discharge ports of the two slurry mixing barrels through the discharge tee, and the two branch supply pipelines connected to the discharge tee are respectively provided with electric-controlled valves five and six, which can conveniently select and transport the mixed slurry in any slurry mixing barrel according to different situations, thereby facilitating the continuous and stable supply of the mixed slurry. The transfer system has a certain degree of automation, which can effectively reduce the labor intensity of underground workers in manually adding cement. While realizing the long-distance and stable transportation of slurry, it also significantly reduces the probability of pipe blockage accidents, effectively improving the grouting reinforcement effect of the coal mine working face floor, which is of great significance to improving the grouting reinforcement efficiency of the coal mine working face floor.

[0016] The present invention also provides a method for long-distance transportation and transfer of reinforcement slurry, including a long-distance transportation and transfer system of reinforcement slurry, and further comprising the following steps:

[0017] Step 1: Control the electric control valve 1, the electric control valve 3 and the electric control valve 7 to be open through the electric control cabinet, keep the electric control valve 2, the electric control valve 4 and the electric control valve 8 closed, control the cement feeder and the first slurry mixing barrel to start working, use the main water supply pipeline and the first branch water supply pipeline to supply water to the first slurry mixing barrel, use the main slurry supply pipeline and the first branch slurry supply pipeline to supply yellow mud slurry to the first slurry mixing barrel, use the cement feeder and the three-way distributor to supply cement to the first slurry mixing barrel, and at the same time, stir the mixed slurry of yellow mud slurry and cement entering the first slurry mixing barrel to ensure that the mixed slurry is fully and evenly stirred;

[0018] After this process continues for the set time, step 2 is executed;

[0019] Step 2: Control the electric control valve 1, the electric control valve 3 and the electric control valve 7 to be closed through the electric control cabinet, control the electric control valve 2, the electric control valve 4 and the electric control valve 8 to be opened, keep the cement feeder and the first slurry mixing barrel in working state, control the second slurry mixing barrel to start working, use the main water supply pipeline and the second branch water supply pipeline to supply water to the second slurry mixing barrel, use the main slurry supply pipeline and the second branch slurry supply pipeline to supply yellow mud slurry to the second slurry mixing barrel, use the cement feeder and the three-way distributor to supply cement to the second slurry mixing barrel, and at the same time, stir the mixed slurry of yellow mud slurry and cement entering the second slurry mixing barrel to ensure that the mixed slurry is fully and evenly stirred;

[0020] Synchronously, the pumping equipment and the slurry storage and mixing barrel are controlled by the electric control cabinet, the electric control valve 5 is controlled to be open, and the electric control valve 6 is kept closed. The mixed slurry stirred in the first slurry preparation and mixing barrel is transported to the slurry storage and mixing barrel by using the first branch feed pipeline and the discharge tee. At the same time, the mixed slurry entering the slurry storage and mixing barrel is stirred to prevent the slurry from settling.

[0021] After this process lasts for the set time, step three is executed;

[0022] Step 3: Control the electric control valve 1, the electric control valve 3 and the electric control valve 7 to be opened through the electric control cabinet, and control the electric control valve 2, the electric control valve 4 and the electric control valve 8 to be closed, keep the cement feeder, the first slurry mixing barrel and the second slurry mixing barrel in working state, use the main water supply pipeline and the first branch water supply pipeline to supply water to the first slurry mixing barrel, use the main slurry supply pipeline and the first branch slurry supply pipeline to supply yellow mud slurry to the first slurry mixing barrel, and use the cement feeder and the three-way distributor to supply cement to the first slurry mixing barrel;

[0023] Synchronously, the electric control cabinet controls the electric control valve six to open and the electric control valve five to close, thereby maintaining the working state of the slurry storage and mixing barrel. The second branch feed pipeline and the discharge tee are used to transport the mixed slurry in the second slurry preparation and mixing barrel to the slurry storage and mixing barrel.

[0024] Synchronously, the grouting pump is controlled by the electric control cabinet to transport the mixed slurry in the slurry storage and mixing barrel to the location of the grouting drill hole, providing pump pressure for grouting reinforcement of the working face bottom plate;

[0025] After this process lasts for the set time, proceed to step 4;

[0026] Step 4: Control the electric control valve 1, the electric control valve 3 and the electric control valve 7 to be closed through the electric control cabinet, and control the electric control valve 2, the electric control valve 4 and the electric control valve 8 to be open, keep the cement feeder, the first slurry mixing barrel and the second slurry mixing barrel in working state, use the main water supply pipeline and the second branch water supply pipeline to supply water to the second slurry mixing barrel, use the main slurry supply pipeline and the second branch slurry supply pipeline to supply yellow mud slurry to the second slurry mixing barrel, and use the cement feeder and the three-way distributor to supply cement to the second slurry mixing barrel;

[0027] Synchronously, the electric control cabinet controls the electric control valve 5 to open and the electric control valve 6 to close, thereby maintaining the working state of the slurry storage and mixing barrel. The first branch feed pipeline and the discharge tee are used to transport the mixed slurry in the first slurry preparation and mixing barrel to the slurry storage and mixing barrel.

[0028] Synchronously, the grouting pump is kept in working condition, and the mixed slurry in the slurry storage and mixing barrel is transported to the location of the grouting drill hole by the grouting pump, providing pump pressure for the grouting reinforcement of the working face bottom plate;

[0029] After this process continues for the set time, step five is executed;

[0030] Step 5: Control the electric control valve 1, the electric control valve 3 and the electric control valve 7 to be opened through the electric control cabinet, and control the electric control valve 2, the electric control valve 4 and the electric control valve 8 to be closed, keep the cement feeder, the first slurry mixing barrel and the second slurry mixing barrel in working state, use the main water supply pipeline and the first branch water supply pipeline to supply water to the first slurry mixing barrel, use the main slurry supply pipeline and the first branch slurry supply pipeline to supply yellow mud slurry to the first slurry mixing barrel, and use the cement feeder and the three-way distributor to supply cement to the first slurry mixing barrel;

[0031] Synchronously, the electric control cabinet controls the electric control valve six to open and the electric control valve five to close, thereby maintaining the working state of the slurry storage and mixing barrel. The second branch feed pipeline and the discharge tee are used to transport the mixed slurry in the second slurry preparation and mixing barrel to the slurry storage and mixing barrel.

[0032] Synchronously, the grouting pump is kept in working condition, and the mixed slurry in the slurry storage and mixing barrel is transported to the location of the grouting drill hole by the grouting pump, providing pump pressure for the grouting reinforcement of the working face bottom plate;

[0033] After this process continues for the set time, step six is ​​executed;

[0034] Step 6: Repeat steps 4 and 5 until the grouting requirements are completed, and then proceed to step 7;

[0035] Step 7: Use the electric control cabinet to control the electric control valve 1, electric control valve 3, electric control valve 7, electric control valve 2, electric control valve 4 and electric control valve 8 to close, control the cement feeder, slurry mixing barrel, pumping equipment, slurry storage mixing barrel and grouting pump to stop working and end the operation.

[0036] In steps 1, 3, and 5, the electric control cabinet performs closed-loop control on the electric control valve 1 through the water supply flow signal fed back in real time by the flow meter 1, and performs closed-loop control on the electric control valve 3 through the yellow mud flow fed back in real time by the flow meter 2. The cement supply is controlled by controlling the operating time of the cement feeder and the opening time of the electric control valve 5, thereby achieving the set proportion of water, yellow mud, and cement.

[0037] Furthermore, in order to realize the automated proportioning process of water, yellow mud and cement, in step 2 and step 4, the electric control cabinet performs closed-loop control on the electric control valve 2 through the water supply flow signal fed back by the flow meter 1 in real time, and performs closed-loop control on the electric control valve 4 through the yellow mud flow fed back by the flow meter 2 in real time, and controls the cement supply by controlling the operating time of the cement feeder and the opening time of the electric control valve 6, thereby realizing the set proportion of water, yellow mud and cement.

[0038] This method has simple steps and a high degree of automation. It can prepare mixed slurry by using two slurry-making mixing barrels in turn through selective output. At the same time, the slurry prepared in the two slurry-making mixing barrels can be output to the slurry storage mixing barrel for storage by using pumping equipment in turn, so as to achieve continuous preparation of mixed slurry. The slurry storage mixing barrel is used to store the mixed slurry, and then the grouting pump is used to transport the mixed slurry to the grouting borehole. The buffering effect of the slurry storage mixing barrel can be used to simultaneously match the relationship between the slurrying efficiency and the grouting rate, which is conducive to achieving long-distance and stable output of the mixed slurry. The method of using a yellow mud slurry conveying pipeline to transport the yellow mud prepared on the ground to the well to prepare the mixed slurry can effectively avoid the phenomenon of precipitation and pipe blockage in the pipeline during the long-distance transportation of the slurry due to the short setting time of cement, effectively improving the grouting efficiency of the base plate and reducing the cost of pipeline cleaning. This method is applicable to coal mines where the working face of the mine faces water inrush from the floor and needs grouting reinforcement, especially when the simple yellow mud grouting reinforcement effect is not good and a mixed slurry of loess and cement or pure cement slurry is required. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A schematic structural diagram of the system in the present invention;

[0040] Figure 2 Schematic diagram of the arrangement of the system in the well of the present invention;

[0041] Figure 3 Schematic diagram of the arrangement of various devices in the lane of the system of the present invention;

[0042] Figure 4 yes Figure 3 A top view of

[0043] Figure 5 The figure is a schematic diagram of the pipeline connection between the cement feeder, the main water pipeline, the main slurry pipeline and the two slurry mixing barrels in the system of the present invention.

[0044] In the figure: 1. Electric control cabinet, 2. Cement loader, 3. Slurry mixing barrel, 4. Slurry storage mixing barrel, 5. Grouting pump, 6. Tunnel, 7. Main slurry pipeline, 8. Flow meter one, 9. Water supply tee, 10. Main water pipeline, 11. Electric control valve one, 12. Electric control valve seven, 13. Electric control valve two, 14. Three-way distributor, 15. Electric control valve eight, 16. Pumping equipment, 17. First branch water pipeline, 18. Second branch water pipeline, 19. First branch slurry pipeline, 20. Second branch slurry pipeline, 21. Electric control valve three, 22. Electric control valve four, 23. Flow meter two. Implementation Method

[0045] The present invention will be further described below.

[0046] like Figures 1 to 5 As shown, the present invention provides a long-distance transportation and transfer system for reinforcement slurry, including a cement feeder 2, a slurry mixing barrel 3, a pumping device 16, a slurry storage and mixing barrel 4, a grouting pump 5, a main water pipeline 10, a main slurry pipeline 7 and an electric control cabinet 1;

[0047] The cement feeder 2, slurry mixing barrel 3, pumping equipment 16, slurry storage mixing barrel 4, grouting pump 5 and electric control cabinet 1 are all arranged in the tunnel 6;

[0048] The discharge port of the cement loader 2 is connected to the feed port of the three-way distributor 14, and the two discharge ports of the three-way distributor 14 are respectively connected to the electric control valve 7 12 and the electric control valve 8 15; the cement loader 2 is used to add cement to the slurry mixing barrel, so as to effectively reduce the labor intensity of the underground workers who manually add cement;

[0049] The slurry mixing barrel 3 is used to prepare a mixed slurry, and a cement feed port, a water inlet and a slurry inlet are provided on the top thereof, and a discharge port is provided on the bottom thereof; there are two slurry mixing barrels 3, and they are arranged side by side below the discharge port of the cement feeder 2; the cement feed ports of the two slurry mixing barrels 3 are respectively connected to the two discharge ports of the three-way distributor 14; the slurry mixing barrel 3 is used to prepare a mixed slurry of yellow mud slurry and cement;

[0050] The feed port of the pumping device 16 is connected to the discharge port of the discharge tee, the first feed port of the discharge tee is connected to the discharge port of the first slurry mixing barrel 3 through the first branch feed pipeline, the second feed port of the discharge tee is connected to the discharge port of the second slurry mixing barrel 3 through the second branch feed pipeline, and the discharge port of the pumping device 16 is connected to the feed port of the slurry storage mixing barrel 4 through the pumping discharge pipeline; the first branch feed pipeline and the second branch feed pipeline are respectively connected in series with the electric control valve 5 and the electric control valve 6;

[0051] The feed port of the grouting pump 5 is connected to the discharge port of the slurry storage and stirring barrel 4 through a grouting feed pipeline, and its discharge port is connected to a grouting discharge pipeline; the slurry storage and stirring barrel 4 is used to store and buffer the mixed slurry prepared by the slurry making and stirring barrel 3, and continuously stir the mixed slurry to prevent the slurry from settling, and at the same time provide slurry for the grouting pump 5 delivery equipment to ensure a good matching relationship between the slurry making rate and the grouting rate; the grouting pump 5 is used to pump the mixed slurry stored in the slurry storage and stirring barrel 4 into the grouting borehole, and can adjust the grouting pressure according to the amount of slurry sucked into the borehole and the grouting rate.

[0052] The water inlet end of the main water supply pipeline 10 is connected to the water source, a flow meter 8 is connected in series in the middle thereof, and the water outlet end thereof is connected to the water inlet of the water supply tee 9. The first water outlet of the water supply tee 9 is connected to the water inlet of the first pulping and mixing barrel 3 through the first branch water supply pipeline 17, and the second water outlet of the water supply tee 9 is connected to the water inlet of the second pulping and mixing barrel 3 through the second branch water supply pipeline 18; the first branch water supply pipeline 17 and the second branch water supply pipeline 18 are respectively connected in series with an electric control valve 11 and an electric control valve 2 13;

[0053] The feed end of the main slurry delivery pipeline 7 is connected to the slurry delivery pipeline, a flow meter 2 23 is connected in series in the middle thereof, and the discharge end is connected to the feed port of the feed tee, the first discharge port of the feed tee is connected to the slurry inlet of the first slurry mixing barrel 3 through the first branch slurry delivery pipeline 19, and the second discharge port of the feed tee is connected to the slurry inlet of the second slurry mixing barrel 3 through the second branch slurry delivery pipeline 20; the first branch slurry delivery pipeline 19 and the second branch slurry delivery pipeline 20 are respectively connected in series with an electric control valve 3 21 and an electric control valve 4 22; the slurry delivery pipeline is connected to the equipment for preparing yellow mud slurry on the ground, so as to transport the prepared yellow mud slurry to the well;

[0054] The electric control cabinet 1 is used for the integrated control of various equipment, and is respectively connected to the cement feeder 2, the slurry mixing barrel 3, the pumping equipment 16, the slurry storage mixing barrel 4, the grouting pump 5, the electric control valve 1 11, the electric control valve 2 13, the electric control valve 3 21, the electric control valve 4 22, the electric control valve 5, the electric control valve 6, the electric control valve 7 12 and the electric control valve 8 15.

[0055] As a preferred embodiment, the electric control cabinet 1 , cement loader 2 , slurry mixing barrel 3 , pumping equipment 16 , slurry storage mixing barrel 4 and grouting pump 5 are arranged in sequence along the length direction of the tunnel 6 .

[0056] The transfer system in the present invention is mainly composed of a cement feeder, a slurry mixing barrel, a pumping device, a slurry storage mixing barrel and a grouting pump, and they are connected to each other by pipelines. In this way, each device can be flexibly arranged at a suitable position in the underground tunnel according to different working conditions. Since the slurry mixing barrel for preparing the mixed slurry is located underground, it is only necessary to transport the yellow mud slurry prepared on the ground to the underground and then mix and stir it with cement and water in the slurry mixing barrel. This effectively realizes the system separation of the yellow mud slurry prepared on the ground and the mixed slurry prepared underground, thereby shortening the transportation time of the mixed slurry in the pipeline. Since the slurry storage mixing barrel has a self-stirring function, it can not only store the prepared mixed slurry, but also continuously stir the stored slurry, thereby effectively preventing the slurry from settling and clogging the pipe, and is conducive to ensuring a continuous and stable supply of reinforcement slurry. By arranging two slurry mixing barrels side by side, the mixed slurry of yellow mud slurry and cement can be prepared in turn. In this way, the continuous preparation of slurry can be achieved and the continuous and stable supply of reinforcement grouting can be guaranteed. The two slurry mixing barrels are connected respectively by a three-way distributor, and the two discharge ports of the three-way distributor are respectively provided with electric-controlled valves seven and eight, which can conveniently transport cement to different slurry mixing barrels according to different situations; the two branch water supply pipelines connected to the main water supply pipeline are respectively connected to the two slurry mixing barrels, and are respectively provided with electric-controlled valves one and two, which can conveniently transport water to different slurry mixing barrels according to different situations; the two branch slurry pipelines connected to the main slurry pipeline are respectively connected to the two slurry mixing barrels, and are respectively provided with electric-controlled valves three and four, which can conveniently transport water to different slurry mixing barrels according to different situations; the pumping equipment is respectively connected to the discharge ports of the two slurry mixing barrels through the discharge tee, and the two branch supply pipelines connected to the discharge tee are respectively provided with electric-controlled valves five and six, which can conveniently select and transport the mixed slurry in any slurry mixing barrel according to different situations, thereby facilitating the continuous and stable supply of the mixed slurry. The transfer system has a certain degree of automation, which can effectively reduce the labor intensity of underground workers in manually adding cement. While realizing the long-distance and stable transportation of slurry, it also significantly reduces the probability of pipe blockage accidents, effectively improving the grouting reinforcement effect of the coal mine working face floor, which is of great significance to improving the grouting reinforcement efficiency of the coal mine working face floor.

[0057] The present invention also provides a method for long-distance transportation and transfer of reinforcement slurry. Taking the grouting reinforcement of the bottom plate of the 1503 working face of a coal mine as an example, the layout concept of a long-distance transportation and transfer system of reinforcement slurry is shown in Figure (1); the original slurry pipeline of the mine is arranged in the return air lane of the south wing, and the underground grouting transfer system is designed to be arranged in the connecting lane near the 1503 working face, that is, the 1505 return air connecting lane, as shown in Figure (2); the cross-sectional view of the underground transfer system equipment layout is shown in Figure (3), and the plan view of the equipment layout is shown in Figure (4); the specific steps include:

[0058] Step 1: Control the electric control valve 11, the electric control valve 3 21 and the electric control valve 7 12 to be open through the electric control cabinet 1, keep the electric control valve 2 13, the electric control valve 4 22 and the electric control valve 8 15 closed, control the cement feeder 2 and the first slurry mixing barrel 3 to start working, use the main water supply pipeline 10 and the first branch water supply pipeline 17 to supply water to the first slurry mixing barrel 3, use the main slurry supply pipeline 7 and the first branch slurry supply pipeline 19 to supply yellow mud slurry to the first slurry mixing barrel 3, use the cement feeder 2 and the three-way distributor 14 to supply cement to the first slurry mixing barrel 3, and at the same time, stir the mixed slurry of yellow mud slurry and cement entering the first slurry mixing barrel 3 to ensure that the mixed slurry is fully and evenly stirred;

[0059] After this process continues for the set time, step 2 is executed;

[0060] Step 2: Control the electric control valve 11, the electric control valve 3 21 and the electric control valve 7 12 to be closed through the electric control cabinet 1, control the electric control valve 2 13, the electric control valve 4 22 and the electric control valve 8 15 to be opened, keep the cement feeder 2 and the first slurry mixing barrel 3 in working state, control the second slurry mixing barrel 3 to start working, use the main water supply pipeline 10 and the second branch water supply pipeline 18 to supply water to the second slurry mixing barrel 3, use the main slurry supply pipeline 7 and the second branch slurry supply pipeline 20 to supply yellow mud slurry to the second slurry mixing barrel 3, use the cement feeder 2 and the three-way distributor 14 to supply cement to the second slurry mixing barrel 3, and at the same time, stir the mixed slurry of yellow mud slurry and cement entering the second slurry mixing barrel 3 to ensure that the mixed slurry is fully and evenly stirred;

[0061] Synchronously, the pumping equipment 16 and the slurry storage and stirring barrel 4 are controlled by the electric control cabinet 1 to operate, the electric control valve 5 is controlled to be open, and the electric control valve 6 is kept closed. The mixed slurry stirred in the first slurry preparation and stirring barrel 3 is transported to the slurry storage and stirring barrel 4 by using the first branch feed pipeline and the discharge tee. At the same time, the mixed slurry entering the slurry storage and stirring barrel 4 is stirred to prevent the slurry from settling.

[0062] After this process lasts for the set time, step three is executed;

[0063] Step 3: Control the electric control valve 1 11, the electric control valve 3 21 and the electric control valve 7 12 to be open through the electric control cabinet 1, and control the electric control valve 2 13, the electric control valve 4 22 and the electric control valve 8 15 to be closed, keep the cement feeder 2, the first slurry mixing barrel 3 and the second slurry mixing barrel 3 in working state, use the main water supply pipeline 10 and the first branch water supply pipeline 17 to supply water to the first slurry mixing barrel 3, use the main slurry supply pipeline 7 and the first branch slurry supply pipeline 19 to supply yellow mud slurry to the first slurry mixing barrel 3, and use the cement feeder 2 and the three-way distributor 14 to supply cement to the first slurry mixing barrel 3;

[0064] Synchronously, the electric control cabinet 1 controls the electric control valve 6 to open and the electric control valve 5 to close, maintaining the working state of the slurry storage and mixing barrel 4, and uses the second branch feed pipeline and the discharge tee to transport the mixed slurry in the second slurry preparation and mixing barrel 3 to the slurry storage and mixing barrel 4;

[0065] Synchronously, the grouting pump 5 is controlled by the electric control cabinet 1 to work, and the mixed slurry in the slurry storage and mixing barrel 4 is transported to the location of the grouting drill hole by the grouting pump 5, providing pump pressure for the grouting reinforcement of the working face bottom plate;

[0066] After this process lasts for the set time, proceed to step 4;

[0067] Step 4: Control the electric control valve 11, the electric control valve 3 21 and the electric control valve 7 12 to be closed through the electric control cabinet 1, and control the electric control valve 2 13, the electric control valve 4 22 and the electric control valve 8 15 to be open, keep the cement feeder 2, the first slurry mixing barrel 3 and the second slurry mixing barrel 3 in working state, use the main water supply pipeline 10 and the second branch water supply pipeline 18 to supply water to the second slurry mixing barrel 3, use the main slurry supply pipeline 7 and the second branch slurry supply pipeline 20 to supply yellow mud slurry to the second slurry mixing barrel 3, and use the cement feeder 2 and the three-way distributor 14 to supply cement to the second slurry mixing barrel 3;

[0068] Synchronously, the electric control cabinet 1 controls the electric control valve 5 to open and the electric control valve 6 to close, maintaining the working state of the slurry storage and mixing barrel 4, and uses the first branch feed pipeline and the discharge tee to transport the mixed slurry in the first slurry preparation and mixing barrel 3 to the slurry storage and mixing barrel 4;

[0069] Synchronously, the grouting pump 5 is kept in working condition, and the mixed slurry in the slurry storage and mixing barrel 4 is transported to the location of the grouting drill hole by the grouting pump 5, providing pump pressure for the grouting reinforcement of the working surface floor;

[0070] After this process continues for the set time, step five is executed;

[0071] Step 5: Control the electric control valve 1 11, the electric control valve 3 21 and the electric control valve 7 12 to be open through the electric control cabinet 1, and control the electric control valve 2 13, the electric control valve 4 22 and the electric control valve 8 15 to be closed, keep the cement feeder 2, the first slurry mixing barrel 3 and the second slurry mixing barrel 3 in working state, use the main water supply pipeline 10 and the first branch water supply pipeline 17 to supply water to the first slurry mixing barrel 3, use the main slurry supply pipeline 7 and the first branch slurry supply pipeline 19 to supply yellow mud slurry to the first slurry mixing barrel 3, and use the cement feeder 2 and the three-way distributor 14 to supply cement to the first slurry mixing barrel 3;

[0072] Synchronously, the electric control cabinet 1 controls the electric control valve 6 to open and the electric control valve 5 to close, maintaining the working state of the slurry storage and mixing barrel 4, and uses the second branch feed pipeline and the discharge tee to transport the mixed slurry in the second slurry preparation and mixing barrel 3 to the slurry storage and mixing barrel 4;

[0073] Synchronously, the grouting pump 5 is kept in working condition, and the mixed slurry in the slurry storage and mixing barrel 4 is transported to the location of the grouting drill hole by the grouting pump 5, providing pump pressure for the grouting reinforcement of the working surface floor;

[0074] After this process continues for the set time, step six is ​​executed;

[0075] Step 6: Repeat steps 4 and 5 until the grouting requirements are completed, and then proceed to step 7;

[0076] Step seven: Control the electric control valve 1 11, the electric control valve 3 21, the electric control valve 7, the electric control valve 2 13, the electric control valve 4 22 and the electric control valve 8 15 through the electric control cabinet 1 to close, control the cement feeder 2, the slurry mixing barrel 3, the pumping equipment 16, the slurry storage mixing barrel 4 and the grouting pump 5 to stop working, and end the operation.

[0077] In order to realize the automated proportioning process of water, yellow mud and cement, in step 1, step 3 and step 5, the electric control cabinet 1 performs closed-loop control on the electric control valve 11 through the water supply flow signal fed back in real time by the flow meter 18, and performs closed-loop control on the electric control valve 3 21 through the yellow mud flow fed back in real time by the flow meter 2 23. The cement supply amount is controlled by controlling the operating time of the cement feeder 2 and the opening time of the electric control valve 5, thereby realizing the set proportion of water, yellow mud and cement.

[0078] In step 2 and step 4, the electric control cabinet 1 performs closed-loop control on the electric control valve 2 13 through the water supply flow signal fed back in real time by the flow meter 1 8, and performs closed-loop control on the electric control valve 4 22 through the yellow mud flow fed back in real time by the flow meter 2 23, and controls the cement supply by controlling the operating time of the cement feeder 2 and the opening time of the electric control valve 6, thereby realizing the set proportion of water, yellow mud and cement.

[0079] This method has simple steps and a high degree of automation. It can prepare mixed slurry by using two slurry-making mixing barrels in turn through selective output. At the same time, the slurry prepared in the two slurry-making mixing barrels can be output to the slurry storage mixing barrel for storage by using pumping equipment in turn, so as to achieve continuous preparation of mixed slurry. The slurry storage mixing barrel is used to store the mixed slurry, and then the grouting pump is used to transport the mixed slurry to the grouting borehole. The buffering effect of the slurry storage mixing barrel can be used to simultaneously match the relationship between the slurrying efficiency and the grouting rate, which is conducive to achieving long-distance and stable output of the mixed slurry. The method of using a yellow mud slurry conveying pipeline to transport the yellow mud prepared on the ground to the well to prepare the mixed slurry can effectively avoid the phenomenon of precipitation and pipe blockage in the pipeline during the long-distance transportation of the slurry due to the short setting time of cement, effectively improving the grouting efficiency of the base plate and reducing the cost of pipeline cleaning. This method is applicable to coal mines where the working face of the mine faces water inrush from the floor and needs grouting reinforcement, especially when the simple yellow mud grouting reinforcement effect is not good and a mixed slurry of loess and cement or pure cement slurry is required.

Claims

1. A long-distance transfer and transportation system for reinforcement slurry, comprising a cement feeder (2) and a slurry mixing barrel (3); characterized in that: It also includes a pumping device (16), a slurry storage and mixing barrel (4), a grouting pump (5), a main water supply pipeline (10), a main slurry supply pipeline (7) and an electric control cabinet (1); The cement feeder (2), slurry mixing barrel (3), pumping equipment (16), slurry storage mixing barrel (4), grouting pump (5) and electric control cabinet (1) are all arranged in the tunnel (6); The discharge port of the cement feeder (2) is connected to the feed port of the three-way distributor (14), and the two discharge ports of the three-way distributor (14) are respectively connected to the electric control valve seven (12) and the electric control valve eight (15); The slurry mixing barrel (3) is used to prepare mixed slurry, and is provided with a cement feed port, a water inlet and a slurry inlet on its top, and a discharge port on its bottom; there are two slurry mixing barrels (3), which are arranged side by side below the discharge port of the cement feeder (2); the cement feed ports of the two slurry mixing barrels (3) are respectively connected to the two discharge ports of the three-way distributor (14); The feed port of the pumping device (16) is connected to the discharge port of the discharge tee, the first feed port of the discharge tee is connected to the discharge port of the first slurry mixing barrel (3) through the first branch feed pipeline, the second feed port of the discharge tee is connected to the discharge port of the second slurry mixing barrel (3) through the second branch feed pipeline, and the discharge port of the pumping device (16) is connected to the feed port of the slurry storage mixing barrel (4) through the pumping discharge pipeline; the first branch feed pipeline and the second branch feed pipeline are respectively connected in series with an electric control valve five and an electric control valve six; The feed port of the grouting pump (5) is connected to the discharge port of the slurry storage and stirring barrel (4) through a grouting feed pipeline, and the discharge port is connected to a grouting discharge pipeline; The water inlet end of the main water supply pipeline (10) is connected to a water source, a flow meter (8) is connected in series in the middle thereof, and the water outlet end thereof is connected to the water inlet of the water supply tee (9), the first water outlet of the water supply tee (9) is connected to the water inlet of the first pulping and stirring barrel (3) through the first branch water supply pipeline (17), and the second water outlet of the water supply tee (9) is connected to the water inlet of the second pulping and stirring barrel (3) through the second branch water supply pipeline (18); the first branch water supply pipeline (17) and the second branch water supply pipeline (18) are respectively connected in series with an electric control valve (11) and an electric control valve (13); The feed end of the main slurry delivery pipeline (7) is connected to the slurry delivery pipeline, wherein a flow meter 2 (23) is connected in series in the middle thereof, and the discharge end is connected to the feed port of the feed tee, the first discharge port of the feed tee is connected to the slurry inlet of the first slurry mixing barrel (3) through the first branch slurry delivery pipeline (19), and the second discharge port of the feed tee is connected to the slurry inlet of the second slurry mixing barrel (3) through the second branch slurry delivery pipeline (20); the first branch slurry delivery pipeline (19) and the second branch slurry delivery pipeline (20) are respectively connected in series with an electric control valve 3 (21) and an electric control valve 4 (22); the slurry delivery pipeline is connected to the equipment for preparing yellow mud slurry on the ground, and is used to transport the prepared yellow mud slurry to the well; The electric control cabinet (1) is respectively connected to the cement feeder (2), the slurry mixing barrel (3), the pumping equipment (16), the slurry storage mixing barrel (4), the grouting pump (5), the electric control valve 1 (11), the electric control valve 2 (13), the electric control valve 3 (21), the electric control valve 4 (22), the electric control valve 5, the electric control valve 6, the electric control valve 7 (12) and the electric control valve 8 (15).

2. A reinforcement slurry long distance transfer and transportation system according to claim 1, characterized in that: The electric control cabinet (1), cement feeder (2), slurry mixing barrel (3), pumping equipment (16), slurry storage mixing barrel (4) and grouting pump (5) are arranged in sequence along the length direction of the tunnel (6).

3. A method for long-distance transfer and transportation of reinforcement slurry, comprising a long-distance transfer and transportation system for reinforcement slurry according to claim 1 or 2, characterized in that: The following steps are also included: Step 1: Control the electric control valve 1 (11), the electric control valve 3 (21) and the electric control valve 7 (12) to be open through the electric control cabinet (1), keep the electric control valve 2 (13), the electric control valve 4 (22) and the electric control valve 8 (15) closed, control the cement feeder (2) and the first slurry mixing barrel (3) to start working, use the main water supply pipeline (10) and the first branch water supply pipeline (17) to supply water to the first slurry mixing barrel (3), use the main slurry supply pipeline (7) and the first branch slurry supply pipeline (19) to supply yellow mud slurry to the first slurry mixing barrel (3), use the cement feeder (2) and the three-way distributor (14) to supply cement to the first slurry mixing barrel (3), and at the same time, stir the mixed slurry of yellow mud slurry and cement entering the first slurry mixing barrel (3) to ensure that the mixed slurry is fully and evenly stirred; After this process continues for the set time, step 2 is executed; Step 2: Control the electric control valve 1 (11), the electric control valve 3 (21) and the electric control valve 7 (12) to be closed through the electric control cabinet (1), control the electric control valve 2 (13), the electric control valve 4 (22) and the electric control valve 8 (15) to be opened, maintain the working state of the cement feeder (2) and the first slurry mixing barrel (3), control the second slurry mixing barrel (3) to start working, use the main water supply pipeline (10) and the second branch water supply pipeline (18) to supply water to the second slurry mixing barrel (3), use the main slurry supply pipeline (7) and the second branch slurry supply pipeline (20) to supply yellow mud slurry to the second slurry mixing barrel (3), use the cement feeder (2) and the three-way distributor (14) to supply cement to the second slurry mixing barrel (3), and at the same time, stir the mixed slurry of yellow mud slurry and cement entering the second slurry mixing barrel (3) to ensure that the mixed slurry is fully and evenly stirred; Synchronously, the pumping device (16) and the slurry storage and stirring barrel (4) are controlled by the electric control cabinet (1), the electric control valve 5 is controlled to be open, and the electric control valve 6 is kept closed. The mixed slurry stirred in the first slurry preparation and stirring barrel (3) is transported to the slurry storage and stirring barrel (4) by using the first branch feed pipeline and the discharge tee. At the same time, the mixed slurry entering the slurry storage and stirring barrel (4) is stirred to prevent the slurry from settling. After this process lasts for the set time, step three is executed; Step 3: Control the electric control valve 1 (11), the electric control valve 3 (21) and the electric control valve 7 (12) to be open through the electric control cabinet (1), control the electric control valve 2 (13), the electric control valve 4 (22) and the electric control valve 8 (15) to be closed, keep the cement feeder (2), the first slurry mixing barrel (3) and the second slurry mixing barrel (3) in working state, use the main water supply pipeline (10) and the first branch water supply pipeline (17) to supply water to the first slurry mixing barrel (3), use the main slurry supply pipeline (7) and the first branch slurry supply pipeline (19) to supply yellow mud slurry to the first slurry mixing barrel (3), and use the cement feeder (2) and the three-way distributor (14) to supply cement to the first slurry mixing barrel (3); Synchronously, the electric control cabinet (1) controls the electric control valve 6 to open and controls the electric control valve 5 to close, thereby maintaining the working state of the slurry storage and stirring barrel (4), and using the second branch feed pipeline and the discharge tee to transport the mixed slurry stirred in the second slurry preparation and stirring barrel (3) to the slurry storage and stirring barrel (4); Synchronously, the grouting pump (5) is controlled by the electric control cabinet (1) to operate, and the mixed slurry in the slurry storage and mixing barrel (4) is transported to the location of the grouting drill hole by the grouting pump (5), thereby providing pump pressure for grouting reinforcement of the working surface bottom plate; After this process lasts for the set time, proceed to step 4; Step 4: Control the electric control valve 1 (11), the electric control valve 3 (21) and the electric control valve 7 (12) to be closed through the electric control cabinet (1), and control the electric control valve 2 (13), the electric control valve 4 (22) and the electric control valve 8 (15) to be opened, keep the cement feeder (2), the first slurry mixing barrel (3) and the second slurry mixing barrel (3) in working state, use the main water supply pipeline (10) and the second branch water supply pipeline (18) to supply water to the second slurry mixing barrel (3), use the main slurry supply pipeline (7) and the second branch slurry supply pipeline (20) to supply yellow mud slurry to the second slurry mixing barrel (3), and use the cement feeder (2) and the three-way distributor (14) to supply cement to the second slurry mixing barrel (3); Synchronously, the electric control cabinet (1) controls the electric control valve 5 to open and controls the electric control valve 6 to close, thereby maintaining the working state of the slurry storage and stirring barrel (4), and using the first branch feed pipeline and the discharge tee to transport the mixed slurry stirred in the first slurry preparation and stirring barrel (3) to the slurry storage and stirring barrel (4); Synchronously, the grouting pump (5) is kept in working condition, and the mixed slurry in the slurry storage and mixing barrel (4) is transported to the location of the grouting borehole by the grouting pump (5), thereby providing pump pressure for grouting reinforcement of the working surface bottom plate; After this process continues for the set time, step five is executed; Step 5: Control the electric control valve 1 (11), the electric control valve 3 (21) and the electric control valve 7 (12) to be open, and control the electric control valve 2 (13), the electric control valve 4 (22) and the electric control valve 8 (15) to be closed through the electric control cabinet (1), so as to keep the cement feeder (2), the first slurry mixing barrel (3) and the second slurry mixing barrel (3) in working state, use the main water supply pipeline (10) and the first branch water supply pipeline (17) to supply water to the first slurry mixing barrel (3), use the main slurry supply pipeline (7) and the first branch slurry supply pipeline (19) to supply yellow mud slurry to the first slurry mixing barrel (3), and use the cement feeder (2) and the three-way distributor (14) to supply cement to the first slurry mixing barrel (3); Synchronously, the electric control cabinet (1) controls the electric control valve 6 to open and controls the electric control valve 5 to close, thereby maintaining the working state of the slurry storage and stirring barrel (4), and the mixed slurry stirred in the second slurry preparation and stirring barrel (3) is transported to the slurry storage and stirring barrel (4) by using the second branch feed pipeline and the discharge tee; Synchronously, the grouting pump (5) is kept in working condition, and the mixed slurry in the slurry storage and mixing barrel (4) is transported to the location of the grouting borehole by the grouting pump (5), thereby providing pump pressure for grouting reinforcement of the working surface bottom plate; After this process continues for the set time, step six is ​​executed; Step 6: Repeat steps 4 and 5 until the grouting requirements are completed, and then proceed to step 7; Step 7: The electric control valve 1 (11), the electric control valve 3 (21), the electric control valve 7, the electric control valve 2 (13), the electric control valve 4 (22) and the electric control valve 8 (15) are all closed through the electric control cabinet (1), and the cement feeder (2), the slurry mixing barrel (3), the pumping equipment (16), the slurry storage mixing barrel (4) and the grouting pump (5) are all stopped, thus ending the operation.

4. The method for using the long-distance transfer and transportation system for reinforcement slurry according to claim 3 is characterized in that: In step 1, step 3 and step 5, the electric control cabinet (1) performs closed-loop control on the electric control valve 1 (11) through the water supply flow signal fed back in real time by the flow meter 1 (8), and performs closed-loop control on the electric control valve 3 (21) through the yellow mud flow fed back in real time by the flow meter 2 (23), and controls the cement supply by controlling the operating time of the cement feeder (2) and the opening time of the electric control valve 5, thereby achieving the set proportion of water, yellow mud and cement addition; In step 2 and step 4, the electric control cabinet (1) performs closed-loop control on the electric control valve 2 (13) through the water supply flow signal fed back in real time by the flow meter 1 (8), and performs closed-loop control on the electric control valve 4 (22) through the yellow mud flow fed back in real time by the flow meter 2 (23), and controls the cement supply by controlling the operating time of the cement feeder (2) and the opening time of the electric control valve 6, thereby achieving the set proportion of water, yellow mud and cement.

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