Mine karst fissure grouting reinforcement device and reinforcement method

Abstract

The invention relates to the technical field of mine tunnel grouting, and discloses a mine karst fissure grouting reinforcement device and a reinforcement method, comprising a shell component and a grouting component, wherein the grouting component is interconnected with the shell component, and the grouting component is located on one side of the shell component, and the grouting component transports slurry to the inside of a rock mass crack through the shell component. The invention cooperates with each other by arranging components such as a water tank and a slurry delivery pipeline, and uses a water tank and a first valve to allow water to enter a grouting pipe through a slurry delivery pipeline, and injects water into the rock mass crack. In this process, dust particles and impurities at the entrance of the rock mass crack are cleaned by water injection, and at the same time, a flow detection meter and compression springs in multiple areas are used to respectively calculate the pressure difference and flow value during the water injection process, and obtain the opening data of the rock mass crack, and the subsequent grouting method is adjusted based on the measured opening data, so that the injected slurry can be evenly filled into the cracks of different opening sizes.

Description

Technical Field

[0001] The invention relates to the technical field of mine tunnel grouting, and in particular to a mine karst fissure grouting reinforcement device and a reinforcement method. Background Art

[0002] Geotechnical engineering is about solving rock and soil engineering problems, including foundations, slopes and underground engineering. In geotechnical engineering, geotechnical grouting is a relatively important part of the work. Its essence is to use pressure to inject solidifiable slurry into the pores or cracks of rock and soil through boreholes, so as to improve the physical and mechanical properties of rock and soil. That is to say, the injection and solidification of slurry is the basis for changing the mechanical properties of reinforced rock and soil. Geotechnical grouting reinforcement device is one of the commonly used equipment in geotechnical engineering. After the mixed slurry is mixed by a mixer, it enters the underground geotechnical grouting reinforcement device through a grouting pump, and then is injected into the rock and soil from the underground geotechnical grouting reinforcement device.

[0003] For example, Chinese patent application number 202410595587.9 discloses a grouting reinforcement device and a grouting reinforcement method for mining polymer materials. The device includes a shell and several grouting pipes. A first valve is provided at one end of the grouting pipes, and a first pipe port is provided on one side of the grouting pipes. A one-way valve is provided on the first pipe port, and a second pipe port is provided on the other side of the grouting pipes. A pressure switch mechanism is provided inside the second pipe port. A grouting box is fixedly provided on the top of the shell, and a stirring mechanism is provided inside the grouting box. A water tank is fixedly provided on the top of the shell on one side of the grouting box, and a discharge port is provided at the bottom of the grouting box and the water tank. A second valve is installed at the discharge port at the bottom of the grouting box, and a discharge mechanism is provided at the bottom of the grouting box and the water tank. The device of the present invention has high grouting efficiency, simple operation and high applicability during the grouting process.

[0004] Based on the above-mentioned existing technology, during the grouting process, water is used to flow in the rock cracks to clean the dust particles in the cracks. In addition, the pressure switch mechanism is used to reasonably distribute the slurry to transport the slurry inside the rock cracks to fill the rock cracks to achieve the purpose of rock reinforcement. In this process, due to the different crack openings on the rock, the required grouting amount and grouting pressure are different. If the required grouting amount and grouting pressure cannot be adjusted in time according to the rock crack opening, the slurry cannot be evenly filled into the rock cracks, thereby affecting the overall stability of the rock after filling.

[0005] Therefore, it is necessary to solve the above problems through mine karst fissure grouting reinforcement device and reinforcement method. Summary of the invention

[0006] The purpose of the present invention is to provide a mine karst fissure grouting reinforcement device and a reinforcement method to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a grouting reinforcement device for karst fissures in a mine, comprising a shell component and a grouting component, wherein the grouting component and the shell component are interconnected, and the grouting component is located on one side of the shell component, and the grouting component transports slurry to the inside of the rock mass crack through the shell component, wherein the shell component comprises an outer shell, a slurry barrel is provided on one side of the upper surface of the outer shell, and a driving motor is provided on the outer side of the top of the slurry barrel, and a rotating shaft is provided at the output end of the driving motor, and the rotating shaft passes through the inside of the slurry barrel and is rotatably connected to the bottom of the inner wall of the slurry barrel; The outer side of the rotating shaft is provided with two rotating rings for being distributed in the upper and lower slurry areas in the slurry barrel, and the outer surface of each rotating ring is provided with stirring blades for stirring the slurry in the slurry barrel, and the bottom of the slurry barrel is provided with a mixing tube for mixing and transporting water and slurry, and a water tank is provided at the end of the mixing tube away from the slurry barrel, and the mixing tube and the bottom of the water tank are communicated with each other, and a connecting plate is provided on the side of the water tank close to the slurry barrel, and the water tank is fixed to the outer surface of the slurry barrel through the connecting plate.

[0008] Preferably, a collecting pipe for collecting liquid after the slurry and water react with each other is provided on the outside of the mixing pipe, and a slurry delivery pipeline for delivering slurry to rock mass fractures is provided below the collecting pipe, and a delivery pump for delivering slurry is provided at one end of the slurry delivery pipeline, and a fixing plate is provided on the side of the delivery pump away from the slurry delivery pipeline, and the top of the fixing plate is arranged at the bottom of the slurry barrel; The bottom of the outer shell is provided with four symmetrically arranged support seats for supporting the outer shell component and the grouting component, and each of the support seats is provided with universal wheels for easy transportation.

[0009] Preferably, the interior of the mixing tube and the collecting tube are interconnected, and two first valves are respectively provided at both ends of the mixing tube, and the two first valves are respectively arranged near the bottom of the water tank and the bottom of the slurry barrel, and the two first valves are respectively used to control the water in the water tank and the slurry in the slurry barrel to transport water and slurry into the mixing tube.

[0010] Preferably, the grouting assembly includes a mounting plate, at least a plurality of delivery pipes are provided on a side of the mounting plate away from the outer shell assembly, and each of the delivery pipes is provided with a grouting pipe for grouting into rock cracks at one end away from the mounting plate, and the delivery pipes located at both ends of the top and bottom of the mounting plate are provided with plugging heads, and a second valve for controlling the entry of slurry into the rock cracks is provided inside the end of each grouting pipe away from the mounting plate, and the end of the grouting pipe located at the bottom of the mounting plate facing the mounting plate is connected to the grouting pipeline.

[0011] Preferably, a connecting pipe for slurry transmission is provided between two adjacent grouting pipes, the connecting pipes located at both ends of the top and bottom of the mounting plate are provided with plugging heads, and the number of the connecting pipes corresponds to the number of the grouting pipes provided, and an active valve for controlling slurry delivery is provided inside one end of each connecting pipe close to the grouting pipe, and a flow meter for detecting the flow rate of the grouting pipe is provided in the grouting pipe close to the bottom of the mounting plate.

[0012] Preferably, an electromagnetic slider is provided on the outer side of the movable valve, and the movable valve is slidably arranged on the inner wall of the connecting pipe through the electromagnetic slider, and three protective plates for protecting the electromagnetic slider are provided on the outer surface of the electromagnetic slider, and a limit block for moving the movable valve is provided on one side of the movable valve, and a support rod for moving the movable valve and the limit block is provided inside the limit block, and a compression spring is provided at the end of the support rod away from the limit block, and the support rod passes through the inner diameter of the compression spring.

[0013] Preferably, an electromagnet is provided on the outer side of the end of the support rod away from the movable valve, and a magnetic block that is compatible with the electromagnet is provided on the end of the movable valve facing the support rod. The electromagnet is used to electromagnetically control the magnetic block and the movable valve to move along the inside of the electromagnetic slider.

[0014] Preferably, a return pipe for conveying water is provided on the top of the water tank, and the end of the return pipe away from the water tank passes through the mounting plate and is interconnected with the grouting pipe on the top of the mounting plate. The return pipe is used to guide the water input into the rock cracks through the grouting pipe to the inside of the water tank.

[0015] The method of using the mine karst fissure grouting reinforcement device is as follows: S1. Use screws to place the mounting plate on the outer surface of the rock crack, then insert the grouting pipe into the grouting area of ​​the rock crack, first deliver water to the mixing pipe, then start the delivery pump to deliver water to the grouting pipe through the grouting pipe and inject it into the rock crack, so as to clean the dust particles and impurities in the crack and the grouting pipe, and also achieve the purpose of wetting the inner wall of the crack; S2, then use the flow meter in the grouting pipe to measure and store the flow at the grouting pipe outlet, use the data provided by the flow meter to calculate the opening data in the rock mass cracks, and pre-adjust the subsequent grouting pressure and the grouting amount at the grouting pipe outlet according to the opening data in the rock mass cracks; S3. Then close the first valve at the bottom of the water tank, and then quickly open the first valve at the bottom of the slurry barrel, so that the internal slurry enters the collecting pipe along the mixing pipe and is transported to the inside of the slurry delivery pipeline. It is transported to the grouting pipe through the delivery pump, and the grouting work is completed to achieve the purpose of filling the slurry into the rock cracks to complete the reinforcement.

[0016] Technical effects and advantages of the present invention: 1. The present invention sets a water tank, a grouting pipeline and other components to cooperate with each other, uses the water tank and the first valve to allow water to enter the grouting pipe through the grouting pipeline, and injects water into the rock cracks. This process not only uses water injection to clean dust particles and impurities at the entrance of the rock cracks, but also uses a flow detection meter and compression springs in multiple areas to calculate the pressure difference and flow value during the water injection process and obtain the opening data of the rock cracks. The subsequent grouting method is adjusted based on the measured opening data, so that the injected slurry can be evenly filled into the cracks of different opening sizes.

[0017] 2. The present invention sets the mutual cooperation of components such as movable valves and electromagnetic sliders, uses the electromagnetic slider to slide longitudinally along the inner wall of the conveying pipe, changes the position of the electromagnetic slider and the movable valve, and according to the calculated crack opening, two groups of adjacent movable valves and the electromagnetic slider cooperate with each other, and use the extrusion method of the slurry in the connecting pipe to achieve the purpose of local increase, which is suitable for use scenarios with small rock crack openings. In addition, multiple groups of movable valves in different areas are set to an open state through electromagnetic sliding, so that the pressure value in each area can be ensured to be lower than the preset value, which is suitable for use scenarios with large rock crack openings. After such adjustment, the purpose of ensuring that the slurry is evenly filled in rock cracks with different openings and completing the reinforcement is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a front view of the overall structure of the present invention; Figure 3 It is a schematic diagram of the overall structure assembly of the present invention; Figure 4 It is a schematic diagram of the overall structure of the present invention in an open state; Figure 5 It is a schematic diagram of the movable valve and related structures of the present invention; Figure 6 It is a cross-sectional view of the connecting pipe structure of the present invention; Figure 7 for Figure 6 The enlarged structural diagram at A in the middle; Figure 8 This is a schematic diagram of the cleaning state of the electromagnet and the movable valve of the present invention; Fig. 9 This is a schematic diagram of the regional distribution of the connecting pipe and the movable valve of the present invention; Fig.10 For the present invention Figure 4 Enlarged structural diagram at B in the middle.

[0019] In the figure: 1. grouting assembly; 101. mounting plate; 102. grouting pipe; 103. connecting pipe; 104. delivery pipe; 105. plugging head; 106. second valve; 107. electromagnetic slider; 108. support rod; 109. electromagnet; 110. limit block; 111. movable valve; 112. protection plate; 2. shell assembly; 201. drive motor; 202. slurry barrel; 203. outer shell; 204. support seat; 205. connecting plate; 206. water tank; 207. slurry delivery pipeline; 208. rotating ring; 209. rotating shaft; 210. stirring blade; 211. reflux pipeline; 212. fixing plate; 213. delivery pump; 214. collecting pipe; 215. mixing pipe; 216. first valve. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0021] like Figure 1-10 As shown, the present embodiment discloses a grouting reinforcement device for karst fissures in a mine, comprising a housing component 2 and a grouting component 1, wherein the grouting component 1 is connected to the housing component 2, and the grouting component 1 is located on one side of the housing component 2, and the grouting component 1 transports slurry to the inside of the rock mass crack through the housing component 2, and the housing component 2 comprises an outer shell 203, a slurry barrel 202 is provided on one side of the upper surface of the outer shell 203, and a driving motor 201 is provided on the outer side of the top of the slurry barrel 202, and a rotating shaft 209 is provided on the output end of the driving motor 201, and the rotating shaft 209 passes through the interior of the slurry barrel 202 and is rotatably connected to the bottom of the inner wall of the slurry barrel 202, and a grouting component 209 is provided on the outer side of the rotating shaft 209 for distributing the slurry on the upper surface of the slurry barrel 202. There are two rotating rings 208 in the upper and lower slurry areas, and the outer surface of each rotating ring 208 is provided with a stirring blade 210 for stirring the slurry in the slurry barrel 202. The bottom of the slurry barrel 202 is provided with a mixing tube 215 for mixing and transporting water and slurry, and the outer side of the mixing tube 215 is provided with a collecting pipe 214 for collecting the liquid after the slurry and water react with each other, and a slurry delivery pipeline 207 for transporting slurry to rock fractures is provided below the collecting pipe 214, and a delivery pump 213 for slurry delivery is provided at one end of the slurry delivery pipeline 207, and a fixed plate 212 is provided on the side of the delivery pump 213 away from the slurry delivery pipeline 207, and the top of the fixed plate 212 is set at the bottom of the slurry barrel 202.

[0022] By injecting water into the rock cracks through the grouting pipe 102 at the rock cracks, impurities such as dust particles at the crack entrance and inside the cracks can be cleaned. Therefore, a water tank 206 is provided at the end of the mixing tube 215 away from the slurry barrel 202. In order to smoothly transport the water in the water tank 206 to the mixing tube 215, the mixing tube 215 is connected to the bottom of the water tank 206. In order to prevent the water tank 206 from falling off or being damaged during operation, a connecting plate 205 is provided on the side of the water tank 206 close to the slurry barrel 202. The water tank 206 is fixed to the outer surface of the slurry barrel 202 through the connecting plate 205. The mixing tube 215 is connected to the inside of the collecting pipe 214. In order to separately control the water in the water tank 206 and the slurry in the slurry barrel 202, two first valves 216 are provided at both ends of the mixing tube 215. The two first valves 216 are respectively arranged near the bottom of the water tank 206 and the slurry barrel. At the bottom of 202, two first valves 216 are respectively used to control the water in the water tank 206 and the slurry in the slurry barrel 202 to transport water and slurry to the mixing tube 215. In order to ensure the stability of the outer shell component 2 and the grouting component 1 during work, four symmetrically arranged support seats 204 are provided at the bottom of the outer shell 203 for supporting the outer shell component 2 and the grouting component 1, and each support seat 204 is provided with a universal wheel for easy transportation. When in use, the grouting pipe 102 is inserted into the rock crack, and then the mixing tube 215 is opened close to the first valve 216 in the water tank 206, and the water in the water tank 206 is transported along the mixing tube 215 to the inside of the slurry delivery pipeline 207, and the slurry water is transported to the inside of the rock crack by the delivery pump 213. In this process, the dust particles and impurities at the crack are cleaned by the flow of water to avoid the slurry from sticking at the outlet of the grouting pipe 102 during the subsequent grouting process, which affects the grouting amount of the grouting pipe 102.

[0023] It should be noted that: during the initial grouting work, it is necessary to open pre-buried holes between the karst cracks in the same number as the grouting pipes 102, and when grouting reinforcement or flushing the cracks with clean water, it is only necessary to insert the grouting pipes 102 into the pre-buried holes.

[0024] In order to collect the water injected into the cracks for next use and avoid frequent waste of water resources, a return pipe 211 for conveying water is provided on the top of the water tank 206, and the end of the return pipe 211 away from the water tank 206 passes through the mounting plate 101 and is interconnected with the grouting pipe 102 on the top of the mounting plate 101. The return pipe 211 is used to guide the water input into the rock cracks through the grouting pipe 207 to the inside of the water tank 206. When in use, after the dust particles and impurities inside the rock cracks are cleaned by water injection, the water is discharged into the return pipe 211 through the grouting pipe 102 on the top of the mounting plate 101 and directly injected into the water tank 206, thereby completing the purpose of collecting water and saving water resources.

[0025] In order to ensure that the slurry injected during the grouting process can be completely and evenly filled into the rock cracks, the grouting assembly 1 includes a mounting plate 101, and at least a plurality of delivery pipes 104 are provided on the side of the mounting plate 101 away from the housing assembly 2, and each delivery pipe 104 is provided with a grouting pipe 102 for grouting into the rock cracks at one end away from the mounting plate 101, and each grouting pipe 102 is provided with a second valve 106 for controlling the slurry to enter the rock cracks at one end away from the mounting plate 101, so that the slurry in the manifold 214 is mixed and transported to the grouting pipe 102 under the guidance of the delivery pump 213 and the grouting pipeline 207, the grouting located at the bottom of the mounting plate 101 The pipe 102 is connected to the grouting pipeline 207. In order to evenly fill the slurry inside the rock crack during the grouting process, a connecting pipe 103 for slurry transmission is provided between two adjacent grouting pipes 102. In order to prevent the slurry from overflowing during the grouting process, plugging heads 105 are provided at the connecting pipes 103 at both ends of the top and bottom of the mounting plate 101, and the number of connecting pipes 103 corresponds to the number of grouting pipes 102. In order to judge whether the crack is completely filled according to the pressure and facilitate uniform grouting for rock cracks of different lengths, a movable valve 1 for controlling slurry transportation is provided inside one end of each connecting pipe 103 close to the grouting pipe 102. 11. In order to calculate the opening of the rock cracks by using the flow at the outlet of the grouting pipe 102 during the water injection cleaning process, so as to facilitate the dynamic adjustment of the grouting method according to the crack opening, a flow meter for detecting the flow of the grouting pipe 102 is provided in the grouting pipe 102 near the bottom of the mounting plate 101, wherein the flow meter is not shown in the accompanying drawings. When in use, the slurry is first injected into the grouting pipe 102 from the grouting pipe 207 by using the delivery pump 213, and then the grouting operation is performed on the inside of the rock cracks through the grouting pipe 102. In this process, since the grouting pipe 207 is only connected to the grouting pipe 102 at the bottom of the mounting plate 101, when the grouting pipe 102 at the bottom is filled, the grouting pipe 102 at the bottom is filled with slurry. When it is full, the internal pressure increases, so that the movable valve 111 will be under pressure through the limit block 110 and the compression spring, and slide upward along the outer surface of the support rod 108. When the movable valve 111 moves out of the electromagnetic slider 107, the slurry will quickly move upward along the flow point generated between the movable valve 111 and the electromagnetic slider 107 and fill into the next grouting pipe 102, and fill the rock cracks in the upper area. Similarly, multiple grouting pipes 102 and connecting pipes 103 are used to cover and fill the entire rock cracks through multiple movable valves 111 to ensure that the slurry in the cracks is evenly filled and solidified, thereby achieving the purpose of reinforcing rock cracks of different lengths.

[0026] In order to enable the movable valve 111 to detect pressure and dynamically adjust the slurry delivery amount according to the pressure values ​​in different states and change the position of the movable valve 111 according to the detected pressure state, an electromagnetic slider 107 is provided on the outer side of the movable valve 111, and the movable valve 111 is slidably arranged on the inner wall of the connecting pipe 103 through the electromagnetic slider 107. In order to protect the electromagnetic slider 107 as much as possible during its movement and avoid serious wear during long-term use, thereby reducing its service life or magnetic field disturbance causing it to be unable to move along the inner wall of the connecting pipe 103, three protective plates 112 for protecting the electromagnetic slider 107 are provided on the outer surface of the electromagnetic slider 107, and a limit block 110 for moving the movable valve 111 is provided on one side of the movable valve 111, and the inner movement of the limit block 110 is provided with a A support rod 108 is used for moving the movable valve 111 and the limit block 110. A compression spring is provided at the end of the support rod 108 away from the limit block 110, and the support rod 108 passes through the inner diameter of the compression spring. In this way, when the movable valve 111 is subjected to a pressure exceeding the elastic force of the compression spring itself, it will move along the outer surface of the support rod 108 through the limit block 110, and then the slurry in the connecting pipe 103 will be discharged upward from the gap between the movable valve 111 and the electromagnetic slider 107. An electromagnet 109 is provided on the outer side of the end of the support rod 108 away from the movable valve 111, and a magnetic block that is compatible with the electromagnet 109 is provided at the end of the movable valve 111 facing the support rod 108. The electromagnet 109 is used to electromagnetically control the magnetic block and the movable valve 111 to move along the inside of the electromagnetic slider 107.

[0027] It should be noted that the cubic law is used to establish the relationship between flow rate and crack opening, and its expression is: , where Q is the volume flow rate (the volume of water passing through the crack per unit time), W is the crack width (the dimension perpendicular to the direction of water flow), and b is the crack opening (the dimension parallel to the direction of water flow) is the pressure difference across the crack, is the dynamic viscosity of water, L is the length of the crack (the length of the water flow path), and the volume of water injected into the crack per unit time can be measured using a flow meter, and the expansion and contraction of the compression spring can be expressed as pressure. , measure the pressure difference at both ends of the crack, and estimate the crack width W and length L. The crack width and length can be measured by geological survey methods, such as observing the cracks in the core after drilling and coring. For the dynamic viscosity of water , can be taken at room temperature .

[0028] It should be noted that: According to the cubic law , the crack opening b can be calculated by substituting the collected data into the formula. For example, assuming the measured flow rate , using the compression spring to measure the pressure difference , crack width , crack length , the dynamic viscosity of water ,but , the opening of the rock crack at this time can be obtained.

[0029] When in use, first, when the grouting pipe 102 at the bottom of the mounting plate 101 has completed the grouting process to evenly fill the space in the rock crack, the grouting pipe 102 at the bottom of the mounting plate 101 can no longer be injected into the crack, and the pressure in the grouting pipe 102 will increase. In this process, when the pressure value in the grouting pipe 102 exceeds the elastic force provided by the compression spring itself, the movable valve 111 in the connecting pipe 103 at the upper part of the grouting pipe 102 will slide upward along the outer surface of the support rod 108 through the limit block 110 due to the pressure. When the movable valve 111 is no longer in contact with the inside of the electromagnetic slider 107, a gap will be generated between the movable valve 111 and the electromagnetic slider 107, which changes with the moving distance of the movable valve 111. At this time, the slurry in the grouting pipe 102 will quickly pass through the movable valve 111 and enter the next grouting pipe 102 and continue to fill the next rock crack area, and so on. The grouting degree is detected by water pressure, and as the pressure increases, the slurries in multiple grouting pipes 102 can fill each other to achieve the purpose of grouting filling inside rock cracks of different lengths.

[0030] Although the dust particles and impurities at the entrance of the rock mass cracks are cleaned by water injection in the early stage, the slurry is prevented from mixing with dust particles and impurities during the grouting process, which causes the slurry to solidify and cause blockage at the outlet of the grouting pipe 102, the opening data of the rock mass cracks are calculated using the data detected by the compression spring and the flow detection meter in the grouting pipe 102 during the water injection process, and the grouting strategy is dynamically adjusted according to the detection results to prevent the injected slurry from being unable to be uniformly filled into the rock mass cracks. When the opening value of the rock mass cracks is less than the preset value, the amount of slurry is usually reduced, and the grouting pressure is increased, so that the slurry can be effectively smoothly entered into the rock mass cracks and complete the filling and reinforcement. When the opening value is greater than the preset value, the grouting pressure is reduced, and the amount of slurry is increased at the same time, so that the slurry injected into the rock mass cracks can be uniformly and slowly filled into the rock mass cracks, thereby increasing the purpose of grouting quality.

[0031] In this process, the increase in grouting pressure will cause the pressure in the grouting pipe 102 and the connecting pipe 103 to increase, which may cause pipe bursting. In addition, when the grouting pressure decreases, the slurry will flow slowly in the pipe, which will cause the concrete on the inner wall of the connecting pipe 103 to solidify and cause blockage. At this time, the compression spring is used to judge the pressure value in each connecting pipe 103 under different conditions, and the working state of the movable valve 111 is dynamically adjusted according to the detected data to ensure that when the grouting pressure is in a high pressure state, pipe bursting is avoided, and when the grouting pressure is in a low pressure state, the slurry is prevented from condensing in the connecting pipe 103 to cause blockage. The specific adjustment process is as follows: A flow meter is used to detect the water injection volume at the outlet of the grouting pipe 102, and during the water injection process, a plurality of compression springs arranged in the movable valve 111 in the connecting pipe 103 are used to measure the pressure values ​​at different water injection points. The opening data of the rock fractures are calculated according to the cubic law shown above, and corresponding adjustments are made according to different opening values.

[0032] It is worth noting that: the plurality of grouting pipes 102 and the plurality of correspondingly arranged connecting pipes 103 (for specific distribution areas, please refer to Fig. 9 ) are respectively recorded as T, T0, T1 and T2 (in actual use, it depends on the length of the rock crack. If the length of the crack is longer in actual use, only the grouting pipe 102 and the connecting pipe 103 need to be added).

[0033] If the calculated opening data of the rock crack is higher than the preset value, it means that the width of the rock crack is higher than the preset value. At this time, the delivery pump 213 is controlled to reduce the output voltage to reduce the pressure of the slurry flowing along the slurry delivery pipeline 207, thereby achieving the purpose of pressure reduction. When the slurry in the slurry delivery pipeline 207 moves along its inner wall to the inside of the grouting pipe 102 near the bottom of the mounting plate 101, the electromagnet 109 at the end of the support rod 108 in each active valve 111 cooperates with the magnetic block on the limit block 110 to rely on the magnetic force to move the active valve 111 and the limit block 110 along the outer surface of the support rod 108 in the direction away from the electromagnetic slider 107, so that each active valve 111 remains in an open state (all active valves 111 in the T, T0, T1 and T2 areas are closed). 11), so that the slurry inside each grouting pipe 102 (all grouting pipes 102 in areas T, T0, T1 and T2) is injected into the rock cracks at a uniform speed. During the grouting process, when the grouting pipe 102 area at the bottom of the mounting plate 101 has completed the uniform grouting work, the slurry will directly enter the next grouting pipe 102 through the movable valve 111 along the connecting pipe 103, and continue the grouting work until the grouting work inside the entire rock crack is completed. The initial open state of the movable valve 111 is that the subsequent slurry directly enters the next grouting pipe 102 without causing a high pressure state, thereby realizing low-pressure grouting. At the same time, the second valve 106 in the end of the rock crack of multiple grouting pipes 102 can be used to adjust the injection amount of slurry.

[0034] During the low-pressure grouting process, the compression springs in the T, T0, T1 and T2 areas are detected respectively to obtain the specific pressure value in each area, and by comparing the pressure difference between the two adjacent areas, it is possible to detect whether the slurry is blocked in the connecting pipe 103. If the compression spring is detected by the compression spring to be higher than the preset value, and the compression spring in the adjacent T area is lower than the preset value, it means that the slurry is blocked between the T area and the T0 area. At this time, the electromagnetic sliders 107 in the T area and the T0 area are respectively controlled to slide back and forth along the inner wall of the connecting pipe 103 to detect the blockage. The position of the plug, when solidification and blockage are detected in the T0 area, the electromagnetic slider 107 and the movable valve 111 in the T0 area are controlled to move to the blockage, and then the electromagnet 109 on the internal support rod 108 is controlled to make the movable valve 111 frequently open and close. The vibration generated by the knocking of the electromagnetic slider 107 by the movable valve 111 is used to clean the slurry at the blockage. After the adjustment is completed, the expansion and contraction amount of the compression spring in the T0 area is compared with that of the compression spring in the T area. If both are restored to the preset value range, it means that the adjustment method is effective, and the grouting work can be continued.

[0035] If after the above adjustment method, it is detected that the expansion and contraction amount of the compression spring in the T0 area has decreased but is still higher than the preset value, and the expansion and contraction amount of the compression spring in the adjacent T area has increased but is still lower than the preset value, at this time, the electromagnetic slider 107 and the movable valve 111 in the T0 area are controlled to approach the blockage, and the electromagnet 109 in the T0 area is controlled to keep the movable valve 111 always open, and then the electromagnetic slider 107 and the movable valve 111 in the T area are moved toward the direction of the T0 area, and the electromagnet 109 in the T area is used during the movement. 09 Control the movable valve 111 so that it is always in a closed state during the movement process, so that during the movement of the electromagnetic slider 107 and the movable valve 111 in the T area, the slurry located in the T area and the T0 area will be squeezed at one end, so that the internal slurry is quickly pushed to the movable valve 111 in the T0 area and rushed to the blockage. In this process, the slurry passing through the T0 area will generate a high-pressure water flow due to the squeezing force, thereby flushing the slurry solidified on the inner wall of the connecting pipe 103, thereby achieving the purpose of high-pressure flushing of the solidified slurry on the inner wall of the connecting pipe 103.

[0036] It is worth noting that: if the slurry in other areas (areas T1 and T2) solidifies and causes blockage, the adjustment method is the same as the above adjustment method, and will not be repeated here.

[0037] If the calculated opening data of the rock mass crack is lower than the preset value, it means that the width of the rock mass crack is lower than the preset value. First, the first valve 216 at the bottom of the water tank 206 and the first valve 216 at the bottom of the slurry barrel 202 are opened respectively, so that the water and the slurry are contacted and mixed inside the manifold 214 along the mixing pipe 215, and are transported to the inside of the conveying pipeline through the manifold 214. In this way, the water and the slurry can be contacted and mixed with each other, thereby achieving the purpose of reducing the slurry concentration and increasing the fluidity. Then, the conveying pump 213 is controlled to increase the output voltage, so that the pressure of the slurry flowing along the slurry conveying pipeline 207 is increased. The force is increased, thereby achieving the purpose of increasing the grouting pressure. When the slurry in the slurry delivery pipeline 207 moves along its inner wall to the grouting pipe 102 near the bottom of the mounting plate 101, the electromagnetic slider 107 in the T area is first used to move along the inner wall of the connecting pipe 103 toward the grouting pipe 102 in the T area, and then the electromagnet 109 on the support rod 108 in the T area is used to control the magnetic block so that the movable valve 111 always keeps in close contact with the electromagnetic slider 107. In this way, the movable valve 111 and the electromagnetic slider 107 will press the slurry in the T area during the synchronous movement, thereby further achieving the pressure increase. Then, the electromagnet 109 in the T area stops releasing the magnetic repulsion force on the magnetic block, so that the active valve 111 in the T area will be quickly opened due to the high pressure state, and the slurry will quickly pass through the T area into the T0 area, and then the active valve 111 in the T area is controlled to be in a closed state, and the electromagnetic slider 107 and the active valve 111 in the T area are moved toward the T0 area. During the movement of the electromagnetic slider 107 and the active valve 111 in the T area, the active valve 111 in the T0 area and the electromagnetic slider 107 are controlled to move toward the T area. At the same time, the active valve 111 in the T0 area The door 111 also remains in a closed state, so that the slurry in the T0 area will be squeezed by the extrusion pressure at both ends of the T area and the T0 area respectively, thereby achieving the purpose of pressurizing the grouting pipe 102 in the T0 area, and so on. The subsequent increase method of the T1 area and the T2 area is consistent with the adjustment method of the first two areas, and the top grouting pipe 102 in the T2 area only needs to control the electromagnetic slider 107 and the active valve 111 in the T2 area to move toward the top of the T2 area. During the movement, the active valve 111 in the T2 area remains closed, thereby achieving the purpose of squeezing the slurry to achieve pressurization.

[0038] During the high-pressure grouting process, the compression springs in areas T, T0, T1 and T2 are detected respectively to obtain the specific pressure value in each area, and the pressure values ​​in the four areas are compared respectively. At this time, if the pressure of the compression spring in a certain area is higher than the preset value, it means that the pressure value of this area needs to be adjusted in time to make the pressure values ​​of the four areas in a balanced state. If it is not adjusted in time, there will be a risk of pipe burst during the long-term grouting process. At this time, the compression springs in the four areas are used to detect the pressure value of each area respectively. If the displacement sensor is used to detect that the expansion and contraction amount of the compression spring in the T0 area is higher than the preset value, where the displacement sensor is not shown in the illustration, the electromagnetic slider 107 and the movable valve 111 in the T1 area are controlled to move toward the direction of the T0 area, and then the electromagnet 109 in the T1 area is used to keep the movable valve 111 in the open state. During this process, the electromagnetic slider 107 in the T area will move The slurry in the T0 area, where the pressure is much higher than that in other areas, is quickly squeezed into the interior of the T1 area. Then, when the T1 area moves to the lowest end (the end position of the connecting pipe 103 in the T area close to the grouting pipe 102), the electromagnet 109 is used to control the movable valve 111 to be quickly closed, so that the squeezed slurry will always be in the T1 area. Then the electromagnetic slider 107 in the T1 area is controlled to move toward the T2 area. At this time, the electromagnetic slider 107 in the T2 area is moved downward. During the movement, the electromagnet 109 is controlled to close the movable valve 111, and the slurry pushed by the electromagnetic slider 107 in the T1 area is squeezed, so that the slurry in the T1 area and the T2 area is discharged from the grouting pipe 102 in the T1 area, thereby achieving a state of depressurizing the T0 area, protecting the connecting pipe 103 in the T0 area, and avoiding pipe bursting during long-term high-pressure grouting.

[0039] It should be noted that: the compression springs in the four areas are used to detect the pressure value of each area respectively, and the area with the highest pressure value and the area with the lowest pressure value are determined. The above-mentioned adjustment method can be used to quickly transport the slurry in the high-pressure area to the grouting pipe 102 in the low-pressure area, which not only achieves the purpose of pressure relief, but also can perform pressure compensation for the grouting pipe 102 in the low-pressure area. The above-mentioned adjustment method only requires that when the electromagnetic slider 107 in the T2 area moves toward the T1 area, the active valve 111 is opened through the electromagnet 109, so that the slurry in the T1 area will quickly enter the T2 area, thereby completing the purpose of transferring the slurry in the high-pressure area.

[0040] It should be noted that in this solution, a displacement sensor is used to detect the displacement of the spring, so as to determine the pressure value of the compressed spring at this time, so as to adjust the grouting strategy in time to avoid pipe bursting during long-term high-pressure grouting.

[0041] The method of using the mine karst fissure grouting reinforcement device is as follows: S1. Use screws to place the mounting plate 101 on the outer surface of the rock crack, then insert the grouting pipe 102 into the grouting area of ​​the rock crack, first deliver water to the mixing pipe 215, then start the delivery pump 213 to deliver water to the grouting pipe 102 through the grouting pipeline 207 and inject it into the rock crack, so as to clean the dust particles and impurities in the crack and the grouting pipe 102, and also achieve the purpose of wetting the inner wall of the crack; S2, then using the flow meter in the grouting pipe 102 to measure and store the flow at the outlet of the grouting pipe 102, using the data provided by the flow meter to calculate the opening data in the rock mass cracks, and pre-adjust the subsequent grouting pressure and the grouting amount at the outlet of the grouting pipe 102 according to the opening data in the rock mass cracks; S3, then close the first valve 216 at the bottom of the water tank 206, and then quickly open the first valve 216 at the bottom of the slurry barrel 202, so that the internal slurry enters the collecting pipe 214 along the mixing pipe 215, and is transported to the inside of the slurry delivery pipeline 207, and is transported to the grouting pipe 102 through the delivery pump 213, and the grouting work is completed, so as to achieve the purpose of filling the slurry to reinforce the rock cracks.

[0042] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A grouting reinforcement device for karst fissures in a mine, comprising a housing component (2) and a grouting component (1), wherein the grouting component (1) and the housing component (2) are interconnected, and the grouting component (1) is located on one side of the housing component (2), and the grouting component (1) transports slurry into the interior of a rock mass fissure through the housing component (2), characterized in that: The housing assembly (2) comprises an outer shell (203), a slurry barrel (202) is provided on one side of the upper surface of the outer shell (203), a driving motor (201) is provided on the outer side of the top of the slurry barrel (202), a rotating shaft (209) is provided at the output end of the driving motor (201), and the rotating shaft (209) passes through the interior of the slurry barrel (202) and is rotatably connected to the bottom of the inner wall of the slurry barrel (202); Two rotating rings (208) for being distributed in the upper and lower slurry areas in the slurry barrel (202) are provided on the outer side of the rotating shaft (209); a stirring blade (210) for stirring the slurry in the slurry barrel (202) is provided on the outer side of each rotating ring (208); a mixing pipe (215) for mixing and transporting water and slurry is provided at the bottom of the slurry barrel (202); a water tank (206) is provided at one end of the mixing pipe (215) away from the slurry barrel (202); the mixing pipe (215) and the bottom of the water tank (206) are in communication with each other; a connecting plate (205) is provided on the side of the water tank (206) close to the slurry barrel (202); and the water tank (206) is fixed to the outer side of the slurry barrel (202) via the connecting plate (205).

2. The grouting reinforcement device for karst fissures in mines according to claim 1 is characterized in that: A collecting pipe (214) for collecting liquid after the slurry and water react with each other is provided on the outside of the mixing pipe (215), and a slurry delivery pipeline (207) for delivering slurry to rock mass fractures is provided below the collecting pipe (214), and a delivery pump (213) for delivering slurry is provided at one end of the slurry delivery pipeline (207), and a fixing plate (212) is provided on the side of the delivery pump (213) away from the grouting pipe (102), and the top of the fixing plate (212) is arranged at the bottom of the slurry barrel (202); The bottom of the outer shell (203) is provided with four symmetrically arranged support seats (204) for supporting the outer shell component (2) and the grouting component (1), and each of the support seats (204) is provided with a universal wheel inside for easy transportation.

3. The grouting reinforcement device for karst fissures in mines according to claim 2 is characterized in that: The interior of the mixing tube (215) and the collecting tube (214) are interconnected. Two first valves (216) are respectively provided at both ends of the mixing tube (215). The two first valves (216) are respectively arranged near the bottom of the water tank (206) and the bottom of the slurry barrel (202). The two first valves (216) are respectively used to control the water in the water tank (206) and the slurry in the slurry barrel (202) to transport the water and slurry into the mixing tube (215).

4. The grouting reinforcement device for karst fissures in mines according to claim 1 is characterized in that: The grouting assembly (1) comprises a mounting plate (101); at least a plurality of delivery pipes (104) are provided on a side of the mounting plate (101) away from the housing assembly (2); and a grouting pipe (102) for grouting into rock mass cracks is provided at one end of each delivery pipe (104) away from the mounting plate (101); a second valve (106) for controlling slurry to enter rock mass cracks is provided inside one end of each grouting pipe (102) away from the mounting plate (101); and the grouting pipe (102) located at the bottom of the mounting plate (101) is in communication with a grouting pipeline (207).

5. The grouting reinforcement device for karst fissures in mines according to claim 4 is characterized in that: A connecting pipe (103) for slurry transmission is provided between two adjacent grouting pipes (102); the connecting pipes (103) located at both ends of the top and bottom of the mounting plate (101) are provided with plugging heads (105); the number of the connecting pipes (103) corresponds to the number of the grouting pipes (102) provided; a movable valve (111) for controlling slurry transmission is provided inside one end of each connecting pipe (103) close to the grouting pipe (102); and a flow meter for detecting the flow rate of the grouting pipe (102) is provided inside the grouting pipe (102) close to the bottom of the mounting plate (101).

6. The grouting reinforcement device for karst fissures in mines according to claim 5 is characterized in that: An electromagnetic slider (107) is provided on the outer side of the movable valve (111), and the movable valve (111) is slidably arranged on the inner wall of the connecting pipe (103) via the electromagnetic slider (107); three protective plates (112) for protecting the electromagnetic slider (107) are provided on the outer surface of the electromagnetic slider (107); a limit block (110) for moving the movable valve (111) is provided on one side of the movable valve (111); and a support rod (108) for moving the movable valve (111) and the limit block (110) is provided inside the limit block (110); a compression spring is provided at the end of the support rod (108) away from the limit block (110), and the support rod (108) passes through the inner diameter of the compression spring.

7. The grouting reinforcement device for karst fissures in mines according to claim 6 is characterized in that: An electromagnet (109) is provided on the outer side of the end of the support rod (108) away from the movable valve (111), and a magnetic block that is compatible with the electromagnet (109) is provided on the end of the movable valve (111) facing the support rod (108). The electromagnet (109) is used to electromagnetically control the magnetic block and the movable valve (111) to move along the inside of the electromagnetic slider (107).

8. The grouting reinforcement device for karst fissures in mines according to claim 3 is characterized in that: A return pipe (211) for conveying water is provided on the top of the water tank (206), and one end of the return pipe (211) away from the water tank (206) passes through the mounting plate (101) and is connected to the grouting pipe (102) on the top of the mounting plate (101). The return pipe (211) is used to guide water input into the rock mass cracks through the grouting pipe (207) to the inside of the water tank (206).

9. A reinforcement method for a karst fissure grouting reinforcement device for a mine, the method being implemented by using the karst fissure grouting reinforcement device for a mine as claimed in claim 7, characterized in that: The specific usage steps are as follows: S1. Using screws, place the mounting plate (101) on the outer surface of the rock mass crack, then insert the grouting pipe (102) into the grouting area at the rock mass crack, first deliver water to the mixing pipe (215), then start the delivery pump (213) to deliver water to the grouting pipe (102) through the grouting pipe (207) and inject it into the rock mass crack, so as to clean the dust particles and impurities at the crack and the grouting pipe (102), and also achieve the purpose of wetting the inner wall of the crack; S2, subsequently using a flow meter in the grouting pipe (102) to measure and store the flow at the outlet of the grouting pipe (102), using the data provided by the flow meter to calculate the opening data in the rock mass fracture, and pre-adjusting the subsequent grouting pressure and the grouting amount at the outlet of the grouting pipe (102) according to the opening data in the rock mass fracture; S3, then close the first valve (216) at the bottom of the water tank (206), and then quickly open the first valve (216) at the bottom of the slurry barrel (202), so that the internal slurry enters the collecting pipe (214) along the mixing pipe (215), and is transported to the inside of the slurry delivery pipe (207), and is transported to the grouting pipe (102) by the delivery pump (213), and the grouting work is completed, so as to achieve the purpose of filling the slurry into the rock mass cracks to complete the reinforcement.

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