Coal mine roadway grouting reinforcement device and construction method

Abstract

The application discloses a coal mine roadway grouting reinforcement device and a construction method, wherein the device comprises a movable board cart, a pump body, a spray gun and a material cylinder containing slurry are arranged on the board cart respectively, the pump body input end is connected to the material cylinder output end through a pipeline, and the pump body output end is connected to the spray gun input end through a pipeline; an eccentric stirring rod parallel to the axis of the material cylinder is arranged in the material cylinder, a first action mechanism is arranged in the material cylinder, and the action mechanism can drive the stirring rod to rotate circumferentially around the axis of the material cylinder to stir the slurry. The first action mechanism arranged in the material cylinder of the board cart can automatically and efficiently stir and mix the curing agent raw materials to form the slurry material required for jet grouting, thereby saving time and effort and being convenient and fast.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of roadway reinforcement, in particular to a coal mine roadway grouting reinforcement device and construction method. BACKGROUND

[0002] Roadway grouting reinforcement is a construction technology used to reinforce underground roadways or tunnels. During the construction process of underground roadways or tunnels, measures need to be taken to reinforce the ground in order to enhance its strength and stability, prevent ground collapse or sliding, and other safety issues. Roadway grouting reinforcement involves injecting slurry material into the ground to form a slurry consolidation layer, thereby improving the strength and stability of the ground. The grouting material is usually a mixture composed of cement, mortar, polymer, etc., with high viscosity and viscosity. The grouting material enters the ground through grouting pipes or holes, filling and consolidating the ground voids, forming a consolidation layer, thereby enhancing the bearing capacity and stability of the ground.

[0003] The roadway grouting reinforcement technology can choose different grouting methods according to specific conditions, such as pressure grouting, gravity grouting, jet grouting, etc. By controlling parameters such as grouting pressure, grouting speed and grouting position, the reinforcement effect on the ground can be achieved.

[0004] Among them, jet grouting usually uses special jetting equipment such as grouting pump and jet gun. The slurry material is generally composed of cement, mortar, polymer, etc., with certain viscosity and viscosity. During construction, the solidifying agent raw materials are first mixed to form slurry material, and then the slurry material is high-pressure sprayed into the ground by the jetting equipment to fill and consolidate the voids and cracks on the surface of the roadway. After the slurry material hardens on the surface of the roadway, a solid consolidation body is formed, increasing the bearing capacity and stability of the roadway, preventing ground loosening, water seepage and collapse, and ensuring the safety and durability of the project.

[0005] However, in the related art, the coal mine roadway is manually mixed with solidifying agent raw materials to form slurry material before jet grouting. This method is not only time-consuming and labor-intensive, but also very inconvenient, and the construction efficiency is also low. SUMMARY

[0006] To solve the technical problems raised in the background art, the present application provides a coal mine roadway grouting reinforcement device and construction method.

[0007] The present application adopts the following technical solution: a coal mine roadway grouting reinforcement device, comprising a movable cart, a pump body, a spray gun and a material cylinder containing slurry are arranged on the cart respectively, the input end of the pump body is connected to the output end of the material cylinder through a pipeline, and the output end of the pump body is connected to the input end of the spray gun through a pipeline;

[0008] The stirring rod is eccentrically arranged in the barrel and parallel to the axis of the barrel, and a first action mechanism is arranged in the barrel, which can drive the stirring rod to rotate around the axis of the barrel to stir the slurry.

[0009] As a further improvement of the above-mentioned solution, a plurality of first paddles in the form of strips are arranged on the stirring rod.

[0010] As a further improvement of the above-mentioned solution, the first action mechanism comprises a support shaft which is rotatably and concentrically arranged in the barrel, a cross arm which is fixed perpendicularly to the support shaft, and the stirring rod which is arranged on the cross arm.

[0011] As a further improvement of the above-mentioned solution, a driven gear is arranged at the top of the support shaft, a motor is arranged at the top of the barrel, a transmission shaft is connected to the output shaft of the motor, the bottom of the transmission shaft penetrates into the barrel, and a cogwheel which intermittently engages with the driven gear is fixed to the bottom of the transmission shaft.

[0012] As a further improvement of the above-mentioned solution, a partition is arranged in the barrel, and the barrel is divided into a stirring chamber and a storage chamber from top to bottom by the partition, the bottom of the support shaft is rotatably arranged at the top of the partition, and a material guiding valve which connects the stirring chamber and the storage chamber is arranged at the bottom of the partition.

[0013] As a further improvement of the above-mentioned solution, a second action mechanism is further arranged in the barrel, which is driven to rotate by the transmission shaft and can drive the stirring rod to rotate while the stirring rod rotates around the axis of the barrel.

[0014] As a further improvement of the above-mentioned solution, the second action mechanism comprises two pulleys, one of which is fixed to the top of the stirring rod, and the other of which is fixed to the outside of the transmission shaft in a sleeved manner, and the two pulleys are connected by an elastic transmission belt.

[0015] As a further improvement of the above-mentioned solution, the transmission belt comprises a plurality of belt bodies which are elastically connected to each other in a closed loop, and the inner side of the belt body is provided with a tooth body, and the outer periphery of the pulley is provided with a groove which is matched with the tooth body.

[0016] As a further improvement of the above-mentioned solution, one end of the belt body is provided with a connecting strip, a sliding groove is arranged in the belt body, a sliding block is arranged in the sliding groove, one end of the connecting strip penetrates into the sliding groove and is fixed to the sliding block, the other end of the connecting strip is fixed to the adjacent belt body, a spring is arranged in the sliding groove, and the spring is sleeved outside the connecting strip and connected to the side wall of the sliding block and the corresponding groove wall of the sliding groove.

[0017] The application also provides a construction method for coal mine roadway grouting reinforcement applied to the device.

[0018] S1, preparation, clean the roadway surface, ensure that the surface is dry and dust-free, and perform necessary drilling and processing work;

[0019] S2, mixing the curing agent, according to specific needs, conveying the curing agent raw material to the barrel of the grouting reinforcement device for mixing and stirring to form a slurry of the curing agent;

[0020] S3, grouting process, pumping the curing agent slurry in the barrel to the spray gun through the pump body of the grouting reinforcement device to spray onto the roadway surface, and moving the device along the entire length of the roadway, gradually moving backward, and paying attention to controlling the flow and pressure of the curing agent during grouting to ensure uniform spraying;

[0021] S4, curing treatment, after uniform spraying of the curing agent slurry, allowing it to naturally cure to complete the grouting reinforcement operation of the coal mine roadway.

[0022] Compared with the prior art, the application has the following advantages:

[0023] 1. The coal mine roadway grouting reinforcement device of the application can automatically and efficiently mix and stir the curing agent raw material to form the slurry material required for jet grouting, saving time and effort, and being convenient and fast.

[0024] 2. The coal mine roadway grouting reinforcement device of the application can make the stirring rod move intermittently around the circumference of the barrel while rotating itself by the structure of the first action mechanism, thereby improving the stirring efficiency and effect of the curing agent raw material.

[0025] 3. The coal mine roadway grouting reinforcement device of the application can make the stirring rod move intermittently around the circumference of the barrel while rotating itself, and simultaneously make the second and third paddles rotate in opposite directions in the vertical plane and the fourth paddle move radially on the third paddle by the second action mechanism, thereby further increasing the contact area of the curing agent raw material for stirring and improving the stirring efficiency and effect. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a schematic view of the structure of the coal mine roadway grouting reinforcement device of the application as a whole;

[0027] Figure 2 is Figure 1 a schematic view of the cross-sectional structure of the barrel;

[0028] Figure 3Fig. 1 is a schematic structural view of a plate trolley according to the present application; Figure 2 Fig. 2 is a schematic structural view of a structure enlarged at A in Fig. 1;

[0029] Figure 4 Fig. 3 is a schematic structural view of a structure enlarged at B in Fig. 1; Figure 2 Fig. 4 is a schematic structural view of a cross section of a barrel in another state;

[0030] Figure 5 Fig. 5 is a schematic structural view of a partial cross section of a transmission belt; Figure 2 Fig. 6 is a schematic structural view of a partial top view of a transmission belt;

[0031] Figure 6 Fig. 7 is a schematic structural view of a partial top view of a transmission belt; Figure 5 Fig. 8 is a schematic structural view of a side view of a third paddle on a rotating barrel;

[0032] Figure 7 Fig. 9 is a schematic structural view of a side view of a disc body on a fixing ring; Figure 2 Fig. 10 is a schematic structural view of a cross section of a barrel in another state;

[0033] Figure 8 Fig. 11 is a schematic structural view of a side view of a third paddle on a rotating barrel; Figure 2 Fig. 12 is a schematic structural view of a side view of a disc body on a fixing ring.

[0034] Main symbol explanation:

[0035] 1, plate trolley; 2, barrel; 3, pump body; 4, support; 5, spray gun; 6, transmission shaft; 7, support shaft; 8, cross arm; 9, stirring rod; 10, first paddle; 11, cogwheel; 12, driven gear; 13, pulley; 15, transmission belt; 151, belt body; 152, connecting strip; 153, sliding groove; 154, sliding block; 155, spring; 156, tooth body; 16, cover; 17, first bevel gear; 18, second bevel gear; 19, rotating shaft; 20, second paddle; 21, third bevel gear; 22, rotating barrel; 23, third paddle; 231, first limiting groove; 24, fixing ring; 25, disc body; 251, second limiting groove; 26, fourth paddle; 27, partition plate. DETAILED DESCRIPTION

[0036] Hereinafter, the present application will be further described in conjunction with the drawings and specific embodiments. It should be noted that the following described embodiments or technical features can be combined arbitrarily to form new embodiments without conflict.

[0037] Embodiment 1

[0038] Please combine Figures 1 to 8The coal mine roadway grouting reinforcement device comprises a movable trolley 1, a pump body 3, a spray gun 5 and a material cylinder 2 containing slurry are arranged on the trolley respectively, the input end of the pump body 3 is connected to the output end of the material cylinder 2 through a pipeline, and the output end of the pump body 3 is connected to the input end of the spray gun 5 through a pipeline. A support 4 is installed on the trolley, and the spray gun 5 is installed on the support 4. The solidifying agent slurry mixed in the material cylinder can be pumped to the spray gun 5 through the pump body 3, so that subsequent roadway grouting spraying reinforcement work can be carried out.

[0039] An eccentric stirring rod 9 parallel to the axis of the material cylinder 2 is arranged in the material cylinder 2, and a first action mechanism is arranged in the material cylinder 2. The action mechanism can drive the stirring rod 9 to rotate circumferentially around the axis of the material cylinder 2 to stir the slurry, so that the stirring rod 9 can complete the stirring of the solidifying agent raw material sent into the material cylinder 2.

[0040] A plurality of first paddle blades 10 in the form of strips are arranged on the stirring rod 9, so as to increase the contact area with the solidifying agent raw material and improve the stirring efficiency and effect.

[0041] Specifically, the first action mechanism comprises a support shaft 7 concentrically arranged in the material cylinder 2, a horizontal arm 8 perpendicular to the support shaft 7 is fixed on the support shaft 7, and the stirring rod 9 is arranged on the horizontal arm 8.

[0042] A driven gear 12 is arranged at the top of the support shaft 7, a motor is installed at the top of the material cylinder 2, a transmission shaft 6 is connected to the output shaft of the motor, the bottom of the transmission shaft 6 penetrates into the material cylinder 2, and a missing tooth gear 11 intermittently engaged with the driven gear 12 is fixed.

[0043] A partition plate 27 is arranged in the material cylinder 2, and the material cylinder 2 is isolated into a stirring cavity and a storage cavity from top to bottom through the partition plate 27, the bottom of the support shaft 7 is rotatably arranged on the top of the partition plate 27, and the bottom of the partition plate 27 is installed with a material guide valve communicating the stirring cavity and the storage cavity.

[0044] In this embodiment, when the solidifying agent raw material is put into the material cylinder 2, the motor is started to drive the output shaft to rotate the transmission shaft 6 and the missing tooth gear 11, so that the missing tooth gear 11 can intermittently engage the transmission to the driven gear 12, so that the support shaft 7 can intermittently drive the stirring rod 9 to rotate circumferentially around the axis of the material cylinder 2 through the horizontal arm 8, so as to realize the stirring of the solidifying agent raw material.

[0045] In order to improve the stirring effect and efficiency of the solidifying agent raw material in the material cylinder 2, the coal mine roadway grouting reinforcement device of the embodiment further comprises a second action mechanism arranged in the material cylinder 2, which is driven to rotate by the transmission shaft 6, and can drive the stirring rod 9 to rotate synchronously while the stirring rod 9 rotates circumferentially around the axis of the material cylinder 2.

[0046] Specifically, the second action mechanism comprises two pulleys 13, one of which is fixed to the top of the stirring rod 9, and the other is sleeved and fixed to the outer side of the transmission shaft 6. The two pulleys 13 are connected by a telescopic transmission belt 15, and the length of the transmission belt 15 can change while keeping tension, avoiding disengagement from the pulley 13.

[0047] The transmission belt 15 comprises a plurality of elastic belt bodies 151, which are connected to each other at the ends and arranged in a closed loop.

[0048] One end of the belt body 151 is inserted with a connecting strip 152, a sliding groove 153 is formed in the belt body 151, a sliding block 154 is arranged in the sliding groove 153, one end of the connecting strip 152 extends into the sliding groove 153 and is fixed on the sliding block 154, the other end of the connecting strip 152 is fixed on the adjacent other belt body 151, a spring 155 is arranged in the sliding groove 153, the spring 155 is sleeved on the outer side of the connecting strip 152, and the two ends are connected to the side wall of the sliding block 154 and the corresponding groove wall of the sliding groove 153 respectively. When the spring 155 is not deformed, the two adjacent belt bodies 151 are in contact at the ends.

[0049] The inner side of the belt body 151 is provided with a tooth body 156, and the outer circumferential side of the pulley 13 is provided with a groove (not indicated) matched with the tooth body 156, so that the pulley 13 can stably drive the transmission belt 15.

[0050] In this embodiment, when the transmission shaft 6 rotates to indirectly make the stirring rod 9 rotate intermittently around the axis of the barrel 2, the stirring rod 9 is also rotated by the pulley 13 and the transmission belt 15, so as to improve the stirring effect and efficiency of the curing agent raw material in the barrel 2.

[0051] In addition, in order to further improve the stirring effect and efficiency of the curing agent raw material in the barrel 2, a cover 16 is fixed to the bottom of the horizontal arm 8, the stirring rod 9 penetrates into the cover 16 and is fixed with a first bevel gear 17, a rotating shaft 19 parallel to the horizontal arm 8 is rotatably inserted into the centrifugal side of the cover 16, one end of the rotating shaft 19 extends into the cover 16 and is fixed with a second bevel gear 18 engaged with the first bevel gear 17, and a plurality of second paddles 20 in strip shape are installed on the other end of the rotating shaft 19. The rotation of the stirring rod 9 drives the second paddles 20 to rotate in the vertical plane through the first bevel gear 17, the second bevel gear 18 and the rotating shaft 19, so as to further improve the contact area, stirring effect and efficiency of the curing agent raw material in the barrel 2.

[0052] Furthermore, in this embodiment, a third conical tooth 21 is installed in the housing 16. The third conical tooth 21 is symmetrically distributed on the centrifugal side of the first conical tooth 17 relative to the second conical tooth 18. A rotating cylinder 22 concentric with the rotating shaft 19 is rotatably inserted on the centrifugal side of the housing 16. The rotating shaft 19 passes through the rotating cylinder 22 and can rotate relative to the rotating cylinder 22. One end of the rotating cylinder 22 extends into the housing 16 and is fixedly connected to the third conical tooth 21. The outer periphery of the other end is provided with multiple plate-shaped third blades 23.

[0053] When the stirring rod 9 rotates through the first bevel tooth 17 and the third bevel tooth 21, the third bevel tooth 21 rotates synchronously with the second bevel tooth 18 but in opposite directions. This causes the rotating cylinder 22 to drive the third blade 23 to rotate in the vertical plane in the opposite direction to the second blade 20, so as to generate convection when the second blade 20 rotates, increase the disturbance to the curing agent raw material, and further improve the contact area, stirring effect and efficiency of the curing agent raw material in the barrel 2.

[0054] Furthermore, a fixing ring 24 concentric with the rotating cylinder 22 is fixed on the centrifugal side of the casing 16. The inner diameter of the fixing ring 24 is much larger than the outer diameter of the rotating cylinder 22, and a disc body 25 is sleeved and fixed on the outer side of the fixing ring 24. Each third blade has a first waist-shaped limiting groove 231 radially formed, and the disc body 25 has a second limiting groove 251 corresponding to the first limiting groove 231. The second limiting groove 251 has a continuous wave-like loop structure. A fourth blade 26 is slidably engaged in the first limiting groove 231, with one end of the fourth blade 26 slidably engaged in the second limiting groove 251.

[0055] Therefore, when the rotating cylinder 22 drives the third blade 23 to rotate in the vertical plane, the third blade 23 will reciprocate within the first limiting groove 231 under the combined limiting action of the first limiting groove 231 and the second limiting groove 251, thereby increasing the contact area with the curing agent raw material and greatly improving the stirring effect and efficiency.

[0056] Example 2

[0057] This embodiment provides a construction method for grouting reinforcement of coal mine roadways applied to the device of Embodiment 1 above, including the following steps:

[0058] S1. Preparation: Clean the surface of the tunnel to ensure it is dry and dust-free, and carry out necessary drilling and treatment work.

[0059] S2. Mixed curing agent: According to specific needs, the curing agent raw materials are transported to the material cylinder of the grouting reinforcement device for mixing and stirring to form a curing agent slurry;

[0060] S3, grouting process, the solidifying agent slurry in the barrel 2 is pumped to the spray gun 5 by the pump body 3 of the grouting reinforcement device to spray to the roadway surface, and the device is grouted along the whole length of the roadway, gradually moving backward, and the flow and pressure of the solidifying agent need to be controlled during grouting to ensure uniform spraying;

[0061] S4, curing treatment, after the solidifying agent slurry is uniformly sprayed, it is naturally cured to complete the grouting reinforcement operation of the coal mine roadway.

[0062] The above-mentioned embodiments are only preferred embodiments of the present application, and cannot be used to limit the protection scope of the present application, and any non-essential changes and replacements made by those skilled in the art on the basis of the present application shall belong to the protection scope of the present application.

Claims

1. A coal mine roadway grouting reinforcement device, characterized in that, The plate car is movable, and a pump body, a spray gun and a material barrel containing slurry are arranged on the plate car respectively. An eccentric stirring rod parallel to the axis of the material barrel is arranged in the material barrel. The first action mechanism can drive the stirring rod to rotate around the axis of the material barrel to stir the slurry. The first action mechanism comprises a support shaft rotatably and concentrically arranged in the material barrel. The support shaft is provided with a horizontal arm perpendicular to the support shaft. The support shaft is provided with a driven gear at the top. The material barrel is provided with a motor at the top. The motor output shaft is connected with a transmission shaft.

2. The coal mine roadway grouting reinforcement device according to claim 1, characterized in that, The transmission shaft penetrates into the material barrel and is fixed with a missing gear intermittently engaged with the driven gear.

3. The coal mine roadway grouting reinforcement device according to claim 1, characterized in that, The second action mechanism is driven to rotate by the transmission shaft.

4. The construction method applied to the coal mine roadway grouting reinforcement device according to any one of claims 1 to 3, characterized in that, The second action mechanism comprises two pulleys. One of the pulleys is fixed to the top of the stirring rod. The other pulley is fixed to the outside of the transmission shaft. The transmission shaft is connected with the transmission shaft through an elastic transmission belt. The transmission belt comprises a plurality of elastic belt bodies. The inside of the belt body is provided with a tooth body. The outside of the belt body is provided with a groove matched with the tooth body. One end of the belt body is inserted with a connecting strip. The inside of the belt body is provided with a sliding groove. The sliding groove is provided with a sliding block. One end of the connecting strip penetrates into the sliding groove and is fixed on the sliding block. The other end of the connecting strip is fixed on the adjacent belt body. The sliding groove is provided with a spring. The spring is sleeved on the outside of the connecting strip and is connected with the sliding block side wall and the corresponding groove wall. A plurality of first paddles are arranged on the stirring rod. The material barrel is provided with a partition plate. The partition plate is arranged from top to bottom to separate the material barrel into a stirring chamber and a storage chamber. The bottom of the support shaft is rotatably arranged on the top of the partition plate. The bottom of the partition plate is provided with a material guide valve connected with the stirring chamber and the storage chamber. The method comprises the following steps: S1, preparation, cleaning the surface of the roadway, ensuring that the surface is dry and dust-free, and drilling and processing; S2, mixing the curing agent, according to the specific needs, the curing agent raw material is transported into the material barrel of the grouting reinforcement device for mixing and stirring to form the slurry of the curing agent; S3, grouting process, the curing agent slurry in the material barrel is pumped to the spray gun by the pump body of the grouting reinforcement device to spray on the surface of the roadway, and the device is moved along the whole length of the roadway, gradually moving backward, and the flow and pressure of the curing agent need to be controlled during grouting to ensure uniform spraying; S4, curing treatment, after the curing agent slurry is uniformly sprayed, it is naturally cured to complete the grouting reinforcement operation of the coal mine roadway.

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