A ground reinforcement technology for fully mechanized mining face passing through structural fracture zone

Abstract

The present invention discloses a ground construction reinforcement process for a fully mechanized mining face passing through a structural fracture zone, which relates to the technical field of coal mine production and comprises the following steps: step 1, determining parameters such as the length, width, and depth of the fracture zone, and recording these parameters, and then determining a reinforcement range based on the influence range of the fracture zone; step 2, formulating a suitable grouting scheme based on the parameters of the fracture zone and in combination with geological conditions, and selecting suitable reinforcement materials; step 3, drilling a hole in the fracture zone, removing loose matter in the hole, and then uniformly filling and grouting the hole at a suitable position using grouting equipment; step 4, after the grouting is completed, inspecting the reinforcement effect at the fracture zone to ensure that the reinforcement quality of the fracture zone meets the working requirements; in the process of drilling, removing loose matter in the hole makes the hole less likely to be blocked by the loose matter, and by setting the bottom end of the grouting pipe in a pointed cone state, the blocked position can be dredged.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine production, in particular to a ground construction reinforcement process for a fully mechanized mining face passing through a structural fracture zone. Background Art

[0002] Tectonic fracture zones are zones of fracture within geological structures caused by structural deformations such as faults, slips, and folds. These zones are characterized by their distribution along tectonic lines, varying in width, length, and depth, and are often closely related to the degree of fracture development in the strata. The presence of these zones can pose safety risks to underground coal mining operations, such as rock spalling and roof collapse.

[0003] In order to improve the safety of underground coal mining, it is generally necessary to manage and reinforce the broken zone. Common methods for reinforcing and managing broken zones include advance grouting reinforcement. When implementing this method, grouting equipment is required. However, during the filling process, uneven filling may occur due to local blockage of the drill hole, thereby affecting the reinforcement effect of the broken zone. The purpose of the present invention is to provide a ground construction reinforcement process for a fully mechanized mining face passing through a structural broken zone. Summary of the Invention

[0004] The technical problem solved by the present invention is: when implementing the existing method for reinforcing the structural broken zone of the comprehensive mining working face, grouting equipment needs to be used for grouting, but during the filling process, uneven filling is easily caused by local blockage of the drill hole, thereby affecting the reinforcement effect of the broken zone.

[0005] The present invention can be implemented by the following technical solution: A ground reinforcement process for a fully mechanized mining face passing through a structural fracture zone comprises the following steps:

[0006] Step 1: Determine the length, width, depth and other parameters of the broken zone, record these parameters, and then determine the reinforcement range based on the impact range of the broken zone;

[0007] Step 2: Based on the parameters of the fracture zone and the geological conditions, formulate an appropriate grouting plan and select appropriate reinforcement materials;

[0008] Step 3: Drill holes in the broken zone, remove loose materials in the holes, and then use grouting equipment to evenly fill the holes at appropriate locations;

[0009] Step 4: After grouting is completed, check the reinforcement effect of the broken zone to ensure that the reinforcement quality of the broken zone meets the work requirements.

[0010] A further technical improvement of the present invention is that in step three, the grouting equipment includes a slurry mixing box, a filling pump and a grouting pipe. The grouting pipe is connected to the slurry mixing box through the filling pump. A plurality of grouting holes are opened on the side wall of the grouting pipe, and the bottom of the grouting pipe is set in a pointed cone shape.

[0011] A further technical improvement of the present invention is that: a shell is fixedly connected to the inside of the grouting pipe, and two strip plates are symmetrically slidably connected to the inside of the shell. The two strip plates are fixedly connected to a No. 1 rod on the side away from each other, and the other end of the No. 1 rod passes through and is slidably connected to the side wall of the shell. The two strip plates are also fixed to a plurality of No. 1 springs on the side away from each other, and the other end of the No. 1 spring is fixed to the inner wall of the shell.

[0012] A further technical improvement of the present invention is that a water inlet pipe passes through and is fixedly connected to the top center of the shell, and the other end of the water inlet pipe is connected to a water pump.

[0013] A further technical improvement of the present invention is that a guide hole is opened on the side wall of the strip plate, and the other end of the guide hole extends to the inside of the No. 1 rod, and a nozzle is fixedly connected to the end of the No. 1 rod close to the grouting hole, and the nozzle is connected to the guide hole.

[0014] A further technical improvement of the present invention is that: a No. 2 rod is also passed through and slidably connected to the side wall of the strip plate, one end of the No. 2 rod located between the two strip plates is fixedly connected to a baffle, and the baffle is fixedly connected to a sealing ring on the side close to the guide hole, a No. 2 spring is fixedly connected to the shoulder of the other end of the No. 2 rod, and the other end of the No. 2 spring is fixedly connected to the side wall of the strip plate.

[0015] A further technical improvement of the present invention is that a stirring rod is passed through and rotatably connected to the top of the slurry stirring box, and a plurality of stirring blades are fixedly connected to the outer wall of the stirring rod.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. In the present invention, during the drilling process, loose objects in the hole are removed to prevent the hole from being blocked by loose objects. By setting the bottom end of the grouting pipe in a pointed cone state, the blocked position can be cleared during the insertion of the grouting pipe into the drilled hole, thereby avoiding the problem of uneven filling caused by local blockage of the drilled hole during the filling process.

[0018] 2. In the present invention, water in the water tank is pumped into the space between the two strip plates by a water pump, so that the two strip plates move away from each other, and then the No. 1 rod moves toward a position close to the grouting hole, which will poke the slurry in the grouting hole and avoid the problem of uneven filling due to blockage of the grouting hole.

[0019] 3. In the present invention, when the two strip plates move away from each other, the No. 2 rod will come into contact with the inner wall of the grouting pipe, so that the No. 2 rod drives the partition to move, so that the opening of the diversion hole is no longer blocked by the partition. At this time, the water between the two strip plates will squeeze into the diversion hole and be sprayed out from the nozzle. Since the end of the No. 1 rod is already in the grouting hole at this time, the nozzle will clean the slurry on the inner wall of the grouting hole, thereby improving the anti-blocking effect of the grouting hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0021] Figure 1 is a process flow chart of the present invention;

[0022] Figure 2 It is a schematic diagram of the partial cross-sectional structure connection of the grouting equipment in the present invention;

[0023] Figure 3 It is a schematic diagram of the partial cross-sectional structure connection of the grouting pipe in the present invention;

[0024] Figure 4 For the present invention Figure 3 A partial enlarged view of point A in the middle;

[0025] Figure 5 For the present invention Figure 4 A partial enlarged view of point B in the middle.

[0026] In the figure: 1. Slurry mixing box; 2. Feeding port; 3. Stirring rod; 4. Stirring blade; 5. Grouting pipe; 6. Filling pump; 7. Grouting hole; 8. Shell; 9. Strip plate; 10. Rod No. 1; 11. Spring No. 1; 12. Water inlet pipe; 13. Diversion hole; 14. Nozzle; 15. Rod No. 2; 16. Spring No. 2; 17. Sealing ring. DETAILED DESCRIPTION

[0027] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0028] See also Figure 1 As shown, a ground construction reinforcement process for a fully mechanized mining face passing through a structural fracture zone includes the following steps:

[0029] Step 1: Determine the length, width, depth and other parameters of the broken zone, record these parameters, and then determine the reinforcement range based on the impact range of the broken zone;

[0030] Step 2: Based on the parameters of the fracture zone and the geological conditions, formulate an appropriate grouting plan and select appropriate reinforcement materials;

[0031] Step 3: Drill holes in the broken zone, remove loose materials in the holes, and then use grouting equipment to evenly fill the holes at appropriate locations;

[0032] Step 4: After grouting is completed, check the reinforcement effect of the broken zone to ensure that the reinforcement quality of the broken zone meets the work requirements.

[0033] See also Figures 2 to 5 As shown, in the above step three, the grouting equipment includes a slurry mixing box 1, and a feeding port 2 is fixedly connected to the top of the slurry mixing box 1 for adding slurry raw materials. A motor is also fixedly installed on the top of the slurry mixing box 1, and a stirring rod 3 is passed through the top of the slurry mixing box 1 and rotatably connected. One end of the stirring rod 3 located in the slurry mixing box 1 is fixedly connected to a plurality of stirring blades 4, and the top end of the stirring rod 3 is fixedly connected to the output shaft of the motor; when working, the slurry raw material is poured into the slurry mixing box 1 from the feeding port 2, and then the motor is started, so that the motor drives the stirring rod 3 to rotate, and the stirring rod 3 drives the plurality of stirring blades 4 to rotate together, so as to achieve uniform stirring of the slurry;

[0034] Furthermore, in the above step three, the grouting equipment also includes a grouting pipe 5, which is connected to the slurry mixing box 1 through a filling pump 6, that is, the slurry mixing box 1 is connected to the input end of the filling pump 6, and the grouting pipe 5 is connected to the output end of the filling pump 6. A plurality of grouting holes 7 are provided on the side wall of the grouting pipe 5, and the bottom of the grouting pipe 5 is configured in a pointed cone to facilitate the insertion of the grouting pipe 5 into the grouting hole 7; when working, the grouting pipe 5 is inserted into the grouting hole 7, and the slurry is pumped into the grouting pipe 5 through the filling pump 6, so that the slurry is discharged from the grouting hole 7 to realize the grouting effect on the broken zone. Since there are multiple grouting holes 7, when one or several grouting holes 7 are blocked, the remaining grouting holes 7 can still be used, so that the grouting effect can be carried out continuously.

[0035] In order to avoid clogging of the grouting hole 7, a shell 8 is fixedly connected to the inside of the grouting pipe 5. The slurry entering from the filling pump 6 will enter the space between the inner wall of the grouting pipe 5 and the outer wall of the shell 8. Two strip plates 9 are symmetrically slidably connected inside the shell 8. The two strip plates 9 are fixedly connected to a No. 1 rod 10 on the side away from each other. The other end of the No. 1 rod 10 passes through and is slidably connected to the side wall of the shell 8. The position of the No. 1 rod 10 and the grouting hole 7 corresponds to each other. The two strip plates 9 are also fixedly connected to a plurality of No. 1 springs 11 on the side away from each other, and the other end of the No. 1 spring 11 is fixedly connected to the inner wall of the shell 8. The No. 1 spring 11 is used to reset the strip plates 9; a water inlet pipe 12 is passed through and fixedly connected at the top center position of the shell 8, and the other end of the water inlet pipe 12 is connected to the water pump, and the input end of the water pump is connected to the water tank;

[0036] When preventing the grouting hole 7 from being blocked, it is necessary to start the water pump, which draws water from the water tank into the space between the two strip plates 9, causing the two strip plates 9 to move in opposite directions, compressing the No. 1 spring 11, and then causing the No. 1 rod 10 to move toward a position close to the grouting hole 7, poking the slurry in the grouting hole 7 to avoid blockage of the grouting hole 7 and avoiding local blockage during the filling process, resulting in uneven filling. Then, when the water pump stops working, disconnect the connection between the water pump output end and the grouting pipe 5. Due to the elastic force of the No. 1 spring 11, the strip plate 9 will return to its initial position to facilitate the next work.

[0037] Furthermore, in order to clean the slurry on the inner wall of the grouting hole 7, a guide hole 13 is opened on the side wall of the strip plate 9, and the other end of the guide hole 13 extends to the inside of the No. 1 rod 10. The No. 1 rod 10 is fixedly connected to a nozzle 14 at one end close to the grouting hole 7, and the nozzle 14 is connected to the guide hole 13; the side wall of the strip plate 9 is also penetrated and slidably connected with a No. 2 rod 15, and the No. 2 rod 15 is fixedly connected to a baffle at one end located between the two strip plates 9, and the baffle is fixedly connected to a sealing ring 17 on one side close to the guide hole 13, and a No. 2 spring 16 is fixedly connected to the shoulder of the other end of the No. 2 rod 15, and the other end of the No. 2 spring 16 is fixedly connected to the side wall of the strip plate 9;

[0038] When cleaning the slurry on the inner wall of the grouting hole 7, start the water pump so that the water pump sends the water in the water tank into the space between the two strip plates 9, causing the two strip plates 9 to move in opposite directions. In this process, the No. 2 rod 15 will contact the inner wall of the grouting pipe 5, and the shoulder of the No. 2 rod 15 will further compress the No. 2 spring 16. At the same time, the No. 2 rod 15 drives the partition to move so that the opening of the guide hole 13 is no longer blocked by the partition. At this time, the water between the two strip plates 9 will squeeze into the guide hole 13 and spray out from the nozzle 14. Since the end of the No. 1 rod 10 is already in the grouting hole 7 at this time, the nozzle 14 will clean the slurry on the inner wall of the grouting hole 7, thereby improving the anti-blocking effect of the grouting hole 7.

[0039] When the present invention is used, the length, width, depth and other parameters of the broken zone are first determined and recorded, and then the reinforcement range is determined according to the influence range of the broken zone; then, based on the parameters of the broken zone and the geological conditions, a suitable grouting plan is formulated and suitable reinforcement materials are selected; then, holes are drilled in the broken zone to remove loose materials in the holes, and then grouting equipment is used to uniformly fill and grout at appropriate locations; after the grouting is completed, the reinforcement effect at the broken zone is inspected to ensure that the reinforcement quality of the broken zone meets the work requirements;

[0040] During grouting, the slurry raw material is poured into the slurry mixing box 1 from the feeding port 2, and the motor is started to drive the stirring rod 3 to rotate, and the stirring rod 3 drives multiple stirring blades 4 to rotate together to achieve uniform stirring of the slurry; then the slurry is pumped into the grouting pipe 5 through the filling pump 6, and the slurry will enter the space between the inner wall of the grouting pipe 5 and the outer wall of the shell 8, and finally the slurry is discharged from the grouting hole 7 to achieve grouting of the broken zone. Since there are multiple grouting holes 7, when one or several grouting holes 7 are blocked, the remaining grouting holes 7 can still be used, so that the grouting effect can be carried out all the time; in this grouting process, the water pump is started, and the water pump draws water in the water tank into the space between the two strip plates 9, so that the two strip plates 9 move in opposite directions, causing the No. 1 spring 11 to be compressed, and then the No. 1 rod 10 moves toward a position close to the grouting hole 7, poking the slurry in the grouting hole 7 When the water in the water tank is pumped into the space between the two strip plates 9, the two strip plates 9 will move back to their original positions to facilitate the next work. At the same time, when the water pump sends the water in the water tank into the space between the two strip plates 9, the two strip plates 9 will move back to their original positions to facilitate the next work.

[0041] In this application, the raw materials for grouting generally include the following:

[0042] Cement: Cement is an indispensable raw material for grouting. Cement-lime slurry is a commonly used grouting material, widely used in construction, groundwater control, and other areas.

[0043] Lime: Organic lime slurry is a very commonly used admixture in concrete grouting. It can increase the viscosity and viscosity of concrete grouting and improve construction quality.

[0044] Sand: Sand is one of the important components of grouting materials. Appropriate sand can make the grouting materials have better fluidity and density.

[0045] Water: The quality and content of water in grouting materials directly affect the performance of grouting materials. In addition, water is also one of the main reactants of concrete and other materials.

[0046] In addition, according to the needs of the project, other raw materials such as polypropylene fiber, foaming agent, etc. can be added to achieve different effects.

[0047] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", etc. should be understood in a broad sense; the above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with a preferred embodiment, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical content disclosed above into an equivalent embodiment with equivalent changes without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification of the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A ground reinforcement process for a fully mechanized mining face passing through a structural fracture zone, characterized by: The following steps are involved: Step 1: Determine the length, width, depth and other parameters of the broken zone, record these parameters, and then determine the reinforcement range based on the impact range of the broken zone; Step 2: Based on the parameters of the fracture zone and the geological conditions, formulate an appropriate grouting plan and select appropriate reinforcement materials; Step 3: Drill holes in the broken zone, remove loose materials in the holes, and then use grouting equipment to evenly fill the holes at appropriate locations; Step 4: After grouting is completed, check the reinforcement effect of the broken zone to ensure that the reinforcement quality of the broken zone meets the work requirements; The grouting equipment comprises a slurry stirring box (1), a filling pump (6) and a grouting pipe (5), wherein the grouting pipe (5) is connected to the slurry stirring box (1) via the filling pump (6); a shell (8) is fixedly connected to the inside of the grouting pipe (5), two strip plates (9) are symmetrically slidably connected to the inside of the shell (8), a No. 1 rod (10) is fixedly connected to the two strip plates (9) on the side away from each other, the other end of the No. 1 rod (10) passes through and is slidably connected to the side wall of the shell (8), and a plurality of No. 1 springs (11) are also fixedly connected to the side away from each other of the two strip plates (9), and the other end of the No. 1 spring (11) is fixedly connected to the inner wall of the shell (8); When preventing the grouting hole (7) from being blocked, it is necessary to start a water pump, which draws water from the water tank into the space between the two strip plates (9), causing the two strip plates (9) to move in opposite directions, compressing the No. 1 spring (11), and thereby causing the No. 1 rod (10) to move toward a position close to the grouting hole (7), thereby poking the slurry in the grouting hole (7) and preventing the grouting hole (7) from being blocked.

2. A ground reinforcement process for a fully mechanized mining face passing through a structural fracture zone according to claim 1, characterized in that: In step three, a plurality of grouting holes (7) are opened on the side wall of the grouting pipe (5), and the bottom of the grouting pipe (5) is arranged in a pointed cone shape.

3. A ground construction reinforcement process for a fully mechanized mining face passing through a structural fracture zone according to claim 1, characterized in that: A water inlet pipe (12) passes through and is fixedly connected to the center position of the top of the shell (8), and the other end of the water inlet pipe (12) is connected to a water pump.

4. A ground reinforcement process for fully mechanized mining face passing through a structural fracture zone according to claim 1, characterized in that: A guide hole (13) is provided on the side wall of the strip plate (9), and the other end of the guide hole (13) extends into the interior of the No. 1 rod (10). The No. 1 rod (10) is fixedly connected with a nozzle (14) at one end close to the grouting hole (7), and the nozzle (14) is communicated with the guide hole (13).

5. A ground reinforcement process for fully mechanized mining face passing through a structural fracture zone according to claim 4, characterized in that: A second rod (15) is also passed through and slidably connected to the side wall of the strip plate (9); one end of the second rod (15) located between the two strip plates (9) is fixedly connected to a baffle, and the baffle is fixedly connected to a sealing ring (17) on the side close to the guide hole (13); a second spring (16) is fixedly connected to the shoulder of the other end of the second rod (15), and the other end of the second spring (16) is fixedly connected to the side wall of the strip plate (9).

6. A ground reinforcement process for fully mechanized mining face passing through a structural fracture zone according to claim 2, characterized in that: A stirring rod (3) is passed through and rotatably connected to the top of the slurry stirring box (1), and a plurality of stirring blades (4) are fixedly connected to the outer wall of the stirring rod (3).

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