A device for sealing a deep hole in an inclined fractured rock and a method for installing a sensor

Abstract

This invention provides a sealing device for an upward-sloping deep hole in fractured surrounding rock and a grouting installation method for sensors. The device includes a grouting pipe, a return grout pipe, a drainage pipe, and a sealing device. The sealing device seals the front of the upward-sloping deep hole. A sensor is arranged inside the deep hole, with its lower end extending through the sealing device. Both the grouting pipe and the return grout pipe penetrate the sealing device and are inserted to the bottom of the deep hole. A receiving cavity is formed between the sealing device and the deep hole. The drainage pipe penetrates the sealing device and is inserted into the receiving cavity. The arrangement of the grouting pipe and the return grout pipe allows the grout to flow from top to bottom from the end of the grouting pipe, ensuring that the entire deep hole is filled and grouted evenly. If grout is lost or bleeds, it can be repeatedly replenished. The sealing position and sealing effect of the sealing device are adjustable to ensure a tight seal, prevent grout leakage, and have a recovery function. This will provide a reliable technical solution for upward-sloping deep hole grouting, effectively improving the grouting effect and the installation accuracy of the monitoring device in fractured surrounding rock.

Description

Technical Field

[0001] This invention relates to the field of deep tunnel engineering and underground engineering technology, and more particularly to a deep hole sealing device for fractured surrounding rock with an upward inclination and a sensor grouting installation method. Background Technology

[0002] In deep tunnel construction and underground engineering, fractured surrounding rock is common, especially in upsloping deep-hole environments. Grouting and sealing operations are affected by the fractured rock mass and complex geological conditions, often resulting in problems such as grout leakage and poor sealing. This can lead to poor coupling between sensors and the surrounding rock, thus affecting the accuracy of monitoring data.

[0003] Existing sealing devices struggle to guarantee effective sealing in complex, fractured surrounding rock, particularly in upward-sloping deep holes. Common sealing methods frequently result in grout leakage and incomplete filling of the deep hole during sensor installation, hindering reliable coupling and accurate monitoring data. Therefore, a simple, easy-to-operate sealing device and sensor grouting installation method are needed to ensure tight coupling between the sensor and the surrounding rock and accurate data acquisition. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a sealing device for an upward-inclined deep hole in fractured surrounding rock and a grouting installation method for a sensor. This invention ensures good coupling between the sensor and the surrounding rock, thereby guaranteeing accurate sensor measurement data. The invention designs a sealing device and a grouting installation method for an upward-inclined deep hole sensor in fractured surrounding rock, ensuring uniform distribution of grout within the deep hole and preventing grout leakage. This ensures stable contact between the sensor and the surrounding rock and accurately reflects changes in relevant parameters of the surrounding rock.

[0005] The technical means employed in this invention are as follows:

[0006] A deep hole sealing device for fractured surrounding rock with an upward inclination, comprising: a grouting pipe, a return grout pipe, a drainage pipe, and a sealing device. The sealing device seals the front of the upward inclination deep hole. A sensor is arranged inside the deep hole, with the lower end of the sensor protruding through the sealing device. The grouting pipe and the return grout pipe both penetrate the sealing device and are inserted to the bottom of the deep hole. The sealing device and the deep hole form a receiving cavity. Grout is injected into the receiving cavity through the grouting pipe, and the drainage pipe penetrates the sealing device and is inserted into the receiving cavity.

[0007] Furthermore, the sealing device includes a silicone barrel, a lower loading plate, an upper loading plate, and a threaded screw. The silicone barrel has a compression and expansion function. The lower loading plate and the upper loading plate are located at both ends of the silicone barrel. The lower loading plate, the silicone barrel, and the upper loading plate are combined together by the threaded screw. The threaded screw passes through the end of the lower loading plate and is connected to a fixing block.

[0008] Furthermore, the silicone bucket is made of compressible and expandable silicone material.

[0009] Furthermore, the silicone barrel is provided with a sensor hole for the sensor to pass through, a grouting pipe hole for the grouting pipe to pass through, a return grouting pipe hole for the return grouting pipe to pass through, a drainage pipe hole for the drainage pipe to pass through, and a threaded screw hole. The lower loading plate is provided with a through hole, and the upper loading plate is provided with a threaded hole. The threaded screw passes through the threaded hole, the threaded screw hole, and the through hole in sequence.

[0010] Furthermore, the end of the grouting pipe is a right-angle elbow with the pipe opening tilted downwards.

[0011] Furthermore, one end of the drain pipe inserted into the receiving cavity is close to or flush with the inner end face of the sealing device.

[0012] The present invention also provides a grouting installation method for an upward-inclined deep-hole sensor in fractured surrounding rock, using the above-mentioned upward-inclined deep-hole sealing device for fractured surrounding rock, comprising the following steps:

[0013] Step 1: Hole Cleaning: After the deep hole drilling is completed, the deep hole is thoroughly cleaned.

[0014] Step 2, Sensor and Pipeline Pre-installation: Pass the sensor, grouting pipe, return grout pipe and drainage pipe through the sealing device and push them into the predetermined position in the deep hole;

[0015] Step 3: Installation of the sealing device: Push the sealing device into the front of the deep hole, and compress and expand the silicone barrel by turning the threaded screw of the sealing device to block the deep hole and perform preliminary sealing.

[0016] Step 4, Water Injection Test: After sealing, first plug the drain pipe, then inject water through the grouting pipe and check if water flows out of the return grout pipe. If there is leakage or the return grout pipe does not produce water for a long time, adjust the threaded screw to loosen the sealing device, adjust the sealing position, and slightly move the sealing position into the deeper hole. Reseal and re-inject water until water flows out of the return grout pipe, then the sealing is successful. Loosen the drain pipe to release the accumulated water.

[0017] Step 5, Grouting: After confirming successful sealing, inject grout through the grouting pipe. When grout flows out of the return grout pipe, it indicates that the deep hole has been filled with grout and the sealing effect is good.

[0018] Step 6: Disassembly of the sealing device: Loosen the silicone barrel by adjusting the threaded screw, remove the sealing device, and reuse it;

[0019] Step 7: Sensor Data Acquisition: The sensor is connected to the host to acquire data in order to monitor and analyze parameter changes in the deep borehole in the deep fractured surrounding rock.

[0020] Furthermore, the sealing device is formed by casting liquid silicone using a mold. The mold includes an outer cylinder, an inner cylinder, a lower pressure plate, an upper pressure plate, a threaded screw pre-drilled hole, a fixing rod, a grouting pipe pre-drilled hole, a return grouting pipe pre-drilled hole, a drainage pipe pre-drilled hole, a silicone injection port, and a silicone observation port. The outer cylinder is fitted over the inner cylinder, and both the outer and inner cylinders are connected between the lower and upper pressure plates. The lower and upper pressure plates are connected by multiple fixing rods. There is a casting space between the inner and outer cylinders. The upper pressure plate is provided with threaded screw pre-drilled holes, grouting pipe pre-drilled holes, return grouting pipe pre-drilled holes, drainage pipe pre-drilled holes, a silicone injection port, and a silicone observation port. The lower pressure plate is provided with blind holes corresponding to the threaded screw pre-drilled holes, grouting pipe pre-drilled holes, return grouting pipe pre-drilled holes, and drainage pipe pre-drilled holes.

[0021] Furthermore, the lower pressure plate is provided with a first groove and a second groove, the upper pressure plate is provided with a third groove and a through hole in the middle, the two ends of the outer cylinder are engaged in the first groove and the third groove, one end of the inner cylinder is engaged in the second groove, and the other end is engaged in the through hole.

[0022] Furthermore, the preparation process of the sealing device includes the following steps:

[0023] Step 1, Mold Preparation: Align the grooves of the outer cylinder, inner cylinder, lower pressure plate, and upper pressure plate with the grooves, and assemble them into a mold using multiple fixing rods; insert rods of the same diameter into the threaded screw pre-drilled holes, grouting pipe pre-drilled holes, return grout pipe pre-drilled holes, and drainage pipe pre-drilled holes provided on the mold to avoid silicone filling;

[0024] Step 2, Silicone Injection: Apply release agent to both the inner wall of the outer cylinder and the outer wall of the inner cylinder. Inject liquid silicone into the casting space between the outer and inner cylinders through the silicone injection port. During the injection process, observe the liquid level and filling status of the silicone through the silicone observation port to ensure that the silicone evenly fills the internal space of the mold.

[0025] Step 3, Silicone Curing: After injecting the silicone, let the mold stand to allow the silicone to cure naturally;

[0026] Step 4, Demolding: After the silicone has fully cured, remove all parts of the mold and take out the molded silicone bucket; check the integrity of the silicone bucket, as well as the molding quality of the injection pipe hole, return pipe hole, drainage pipe hole, and sensor hole.

[0027] Step 5: Installation of upper and lower loading plates and threaded screws: Assemble the lower loading plate, silicone barrel, and upper loading plate together in the design sequence, ensuring that the threaded screw passes through the threaded hole of the upper loading plate, the threaded screw hole of the silicone barrel, and the through hole of the lower loading plate, and fix a fixing block at the end of the threaded screw to ensure that the rotation of the threaded screw can smoothly adjust the compression and expansion of the silicone barrel.

[0028] Step 6: Overall assembly and debugging: Test the overall sealing performance of the sealing device. In the deep hole, test whether the upper and lower loading plates can effectively compress the silicone barrel by turning the threaded screw, causing it to expand to the hole wall and achieve the sealing effect.

[0029] Compared with the prior art, the present invention has the following advantages:

[0030] This invention provides a simple-to-operate, highly effective sealing device and sensor grouting installation method for deep holes in complex, fractured rock conditions, particularly suitable for sensor installation in upward-inclined deep holes. The design of the grouting pipe and return pipe ensures that the grout fully fills the entire deep hole and allows for repeated grouting as needed. The compressible, expandable silicone tubing maintains tight contact with the hole wall, effectively preventing grout leakage and ensuring good coupling between the sensor and the surrounding rock, significantly improving measurement accuracy and providing accurate data support for deep rock monitoring. Furthermore, the sealing device can be easily removed and reused after the grout solidifies by adjusting the threaded screw, reducing equipment operating costs. The device is simple in structure and easy to operate, suitable for deep hole grouting of different specifications, and provides highly efficient sealing and grouting effects, especially under complex, fractured rock conditions. Its operational flexibility is reflected in the ability to adjust the sealing position and expansion degree according to actual needs via the threaded screw, ensuring flexibility and effective control during construction.

[0031] Based on the above reasons, this invention can be widely applied in fields such as deep hole sensor grouting installation under complex fractured surrounding rock conditions. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the grouting installation of an upward-tilting deep-hole sensor for fractured surrounding rock according to the present invention.

[0034] Figure 2 This is a schematic diagram of the sealing device for an upward-inclined deep hole in fractured surrounding rock according to the present invention.

[0035] Figure 3 This is a structural diagram of the sealing device of the present invention, wherein (a) is an isometric view and (b) is a front view.

[0036] Figure 4 The diagram shows the structure of the mold for preparing the sealing device of the present invention, wherein (a) is an isometric view, (b) is a structural schematic diagram of the upper pressure plate, and (c) is a structural schematic diagram of the lower pressure plate.

[0037] Figure 5 The following are physical images of the present invention, wherein (a) is a physical image of a silicone barrel being cast using a sealing device mold, and (b) is a physical image of the sealing device.

[0038] In the diagram: 1. Fractured surrounding rock; 2. Deep hole; 3. Sensor; 4. Grouting pipe; 5. Return grout pipe; 6. Drainage pipe; 7. Grout flow path; 8. Return grout path; 9. Grout; 10. Sealing device; 10-1. Silicone bucket; 10-2. Lower loading plate; 10-3. Upper loading plate; 10-4. Threaded screw; 10-5. Fixing block; 10-6. Grouting pipe hole; 10-7. Return grout. Pipe hole; 10-8, Drainage pipe hole; 10-9, Sensor hole; 11-0, Outer cylinder; 11-1, Inner cylinder; 11-2, Lower pressure plate; 11-3, Upper pressure plate; 11-4, Threaded screw reserved hole; 11-5, Fixing rod; 11-6, Grouting pipe reserved hole; 11-7, Return grout pipe reserved hole; 11-8, Drainage pipe reserved hole; 11-9, Silicone injection port; 11-10, Silicone observation port. Detailed Implementation

[0039] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0042] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0043] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0044] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0045] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0046] like Figure 1 , Figure 2 and Figure 3As shown, this invention provides an upward-sloping deep-hole sealing device for fractured surrounding rock, suitable for deep-hole sensor grouting installation under complex fractured surrounding rock conditions. It includes a specially designed grouting pipe 4, a return grout pipe 5, a drainage pipe 6, and a sealing device 10. An upward-sloping deep hole 2 is drilled in the fractured surrounding rock 1. A sensor 3 is arranged inside the deep hole 2. The sealing device 10 seals the front part of the upward-sloping deep hole 2, with the lower end of the sensor 3 protruding from the sealing device 10. Both the grouting pipe 4 and the return grout pipe 5 pass through the sealing device 10 and are inserted to the bottom of the upward-sloping deep hole 2. A receiving cavity is formed between the sealing device 10 and the deep hole 2. The drainage pipe 6 passes through the sealing device 10 and is inserted into the deep hole 2 (within the receiving cavity). One end of the drainage pipe 6 inserted into the receiving cavity is close to or flush with the inner end face of the sealing device 10. Grout 9 is injected into the receiving cavity through the grouting pipe 4. The sealing device 10 consists of a silicone barrel 10-1, a lower loading plate 10-2, an upper loading plate 10-3, and threaded screws 10-4. The lower loading plate 10-2 and the upper loading plate 10-3 are located at both ends of the silicone barrel 10-1. The lower loading plate 10-2, the silicone barrel 10-1, and the upper loading plate 10-3 are connected together by two threaded screws 10-4. The silicone barrel 10-1 is made of compressible and expandable silicone material. The silicone barrel 10-1 has a sensor hole 10-9 for the sensor 3 to pass through, a grouting pipe hole 10-6 for the grouting pipe 4 to pass through, a return grouting pipe hole 10-7 for the return grouting pipe 5 to pass through, a drain pipe hole 10-8 for the drain pipe 6 to pass through, and two threaded screw holes. The upper loading plate 10-3 has a threaded hole for the threaded rod 10-4 to pass through, and the threaded rod hole of the lower loading plate 10-2 is a through hole. The threaded rod 10-4 passes through the threaded hole, the threaded rod hole and the through hole in sequence, and the end of the threaded rod 10-4 that passes through the through hole is connected to the fixing block 10-5.

[0047] like Figure 2 As shown, when the sealing device 10 is in use, the threaded screw 10-4 rotates to compress the silicone barrel 10-1 by the upper loading plate 10-2 and the lower loading plate 10-3. The silicone barrel 10-1 expands to the hole wall to seal the deep hole 2, ensuring the sealing of the hole and the sealing performance of the device.

[0048] After grouting is completed and the grout 9 has solidified, the compressed silicone barrel 10-1 is loosened by adjusting the threaded screw 10-4, and the sealing device 10 is taken out, so that the device can be reused.

[0049] The sealing device 10 can adjust the threaded screw 10-4 to loosen the silicone barrel 10-1 according to the actual sealing effect, adjust the sealing position, and perform sealing multiple times to ensure a tight seal and prevent leakage, thereby improving the sealing effect.

[0050] The specially designed grouting pipe 4 and return grout pipe 5 are inserted into the bottom of the upward-sloping deep hole 2, allowing the grout 9 to fill the entire deep hole 2 from top to bottom along the grout flow path 7 from the opening of the grouting pipe 4. The return grout pipe 5 monitors whether the grouting is complete and whether there is any leakage. If the grout 9 is lost or bleeds, it can be repeatedly replenished through the grouting pipe 4. The return grout pipe 5 has a return grout path 8 inside.

[0051] The end of the specially designed grouting pipe 4 is designed as a right-angle elbow with the pipe opening tilted downwards, which optimizes the flow direction of the grout 9 and ensures that the deep hole 2 is filled more evenly and thoroughly.

[0052] The arrangement of the grouting pipes and return pipes in this invention allows the grout to flow from top to bottom through the end of the grouting pipe, ensuring complete filling of the deep hole and uniform grouting. If grout loss or bleeding occurs, it can be repeatedly replenished. The sealing position and sealing effect of the sealing device are adjustable, ensuring a tight seal, preventing grout leakage, and also possessing a recovery function. This will provide a reliable technical solution for upward-inclined deep-hole grouting, effectively improving the grouting effect of fractured surrounding rock and the installation accuracy of the monitoring device.

[0053] The present invention also provides a grouting installation method for an upward-inclined deep-hole sensor in fractured surrounding rock, using the above-mentioned upward-inclined deep-hole sealing device for fractured surrounding rock, comprising the following steps:

[0054] Step 1: Drilling and cleaning: After the drilling of deep hole 2 is completed, deep hole 2 should be thoroughly cleaned to ensure that there are no residues inside the hole.

[0055] Step 2, Sensor 3 and Pipeline Pre-installation: Connect sensor 3 according to the design, pass sensor 3, grouting pipe 4, return grout pipe 5 and drainage pipe 6 through sealing device 10 and push them into the predetermined position of deep hole 2 to ensure accurate positioning.

[0056] Step 3: Installation of the sealing device 10: Push the sealing device 10 into the shallow part of the deep hole 2 (the front part of the deep hole 2, i.e., a distance from the hole opening into the hole, located near the hole opening). By turning the threaded screw 10-4 of the sealing device 10, the silicone barrel 10-1 is compressed and expanded, sealing the deep hole 2 and achieving a preliminary sealing effect. The compression and expansion of the silicone barrel 10-1 will reduce the size of the grouting pipe hole 10-6, the return grout pipe hole 10-7, the drainage pipe hole 10-8, and the sensor hole 10-9, thus achieving a sealing effect.

[0057] Step 4, Water Injection Test: After sealing, first block the drain pipe 6, then inject water through the grouting pipe 4 and check if water flows out of the return grout pipe 5. If there is leakage or the return grout pipe 5 does not produce water for an extended period, adjust the threaded screw 10-4 to loosen the sealing device 10, adjust the sealing position, and slightly move the sealing position into the deep hole 2. Reseal and re-inject water until water flows out of the return grout pipe 5, indicating successful sealing. Loosen the drain pipe 6 to release the accumulated water.

[0058] Step 5, Grouting: After confirming successful sealing, inject grout 9 through grouting pipe 4. When grout 9 flows out of return grout pipe 5, it indicates that deep hole 2 has been filled with grout 9 and the sealing effect is good.

[0059] Step 6: Disassembly of sealing device 10: If necessary, the silicone barrel 10-1 can be loosened by adjusting the threaded screw 10-4, and the sealing device 10 can be removed for reuse.

[0060] Step 7: Sensor 3 Data Acquisition: Sensor 3 is connected to the host to acquire data in order to monitor and analyze parameter changes in the deep borehole in the deep fractured surrounding rock.

[0061] like Figure 4 As shown, the sealing device 10 is formed by casting liquid silicone using a mold. The mold includes an outer cylinder 11-0, an inner cylinder 11-1, a lower pressure plate 11-2, an upper pressure plate 11-3, a threaded screw pre-drilled hole 11-4, a fixing rod 11-5 (mold fixing rod), a grouting pipe pre-drilled hole 11-6, a return grouting pipe pre-drilled hole 11-7, a drain pipe pre-drilled hole 11-8, a silicone injection port 11-9, and a silicone observation port 11-10, which are used to ensure that the shape and function of the silicone bucket 10-1 meet the sealing requirements. The outer cylinder 11-0 is fitted over the inner cylinder 11-1. Both the outer cylinder 11-0 and the inner cylinder 11-1 are connected between the lower pressure plate 11-2 and the upper pressure plate 11-3. The lower pressure plate 11-2 and the upper pressure plate 11-3 are connected by multiple fixing rods 11-5. There is a pouring space between the inner cylinder 11-1 and the outer cylinder 11-0. The upper pressure plate 11-3 is provided with a threaded screw reserved hole 11-4, a grouting pipe reserved hole 11-6, a return grout pipe reserved hole 11-7, a drainage pipe reserved hole 11-8, a silicone injection port 11-9, and a silicone observation port 11-10. The lower pressure plate 11-2 is provided with blind holes corresponding to the threaded screw reserved hole 11-4, the grouting pipe reserved hole 11-6, the return grout pipe reserved hole 11-7, and the drainage pipe reserved hole 11-8. The lower pressure plate 11-2 is provided with a first groove and a second groove, the upper pressure plate 11-3 is provided with a third groove and a through hole in the middle, the two ends of the outer cylinder 11-0 are engaged in the first groove and the third groove, one end of the inner cylinder 11-1 is engaged in the second groove, and the other end is engaged in the through hole.

[0062] The sealing device is simple in design and easy to operate, and is suitable for deep hole grouting projects of different specifications. Especially under complex and fractured surrounding rock conditions, it can provide efficient sealing and grouting effects and has the advantage of being reusable.

[0063] The preparation process of the sealing device 10 includes the following steps:

[0064] Step 1, Mold Preparation: Align the grooves of the outer cylinder 11-0, inner cylinder 11-1 with the grooves of the lower pressure plate 11-2 and upper pressure plate 11-3, and then assemble them using four fixing rods 11-5, ensuring that all parts of the mold are tightly joined. Insert rods of the same diameter into the threaded screw pre-drilled holes 11-4, grouting pipe pre-drilled holes 11-6, return grout pipe pre-drilled holes 11-7, and drainage pipe pre-drilled holes 11-8 on the mold, avoiding silicone filling.

[0065] Step 2, Silicone Injection: Apply release agent to the inner wall of the outer cylinder 11-0 and the outer wall of the inner cylinder 11-1. Then, prepare the liquid silicone material and inject it into the casting space between the outer cylinder 11-0 and the inner cylinder 11-1 through the silicone injection port 11-9. During the injection process, monitor the silicone level and filling status through the silicone observation port 11-10 to ensure that the silicone evenly fills the internal space of the mold. Observe the change in the silicone level in the casting space through the silicone observation port 11-10. When the silicone level gradually rises and is about to overflow the silicone observation port 11-10, the silicone has filled the entire casting space, and the interior is completely filled with silicone.

[0066] Step 3, Silicone Curing: After injecting the silicone, let the mold stand to allow the silicone to cure naturally under appropriate temperature and time conditions. The curing time of silicone depends on its material properties and usually takes several hours or longer. The specific time should be controlled according to the silicone material instructions.

[0067] Step 4, Demolding: After the silicone has fully cured, remove all parts of the mold and take out the molded silicone bucket 10-1. Check the integrity of the silicone bucket 10-1, especially the molding quality of the functional holes (grouting pipe hole 10-6, return grout pipe hole 10-7, drainage pipe hole 10-8, sensor hole 10-9).

[0068] Step 5: Installation of upper and lower loading plates and threaded screws: Assemble the lower loading plate 10-2, silicone barrel 10-1, and upper loading plate 10-3 in the designed sequence. Ensure that the threaded screw 10-4 passes through the threaded hole of the upper loading plate 10-3, the threaded screw hole of the silicone barrel 10-1, and the through hole of the lower loading plate 10-2. Fix a fixing block 10-5 to the end of the threaded screw 10-4 to ensure that the rotation of the threaded screw 10-4 can smoothly adjust the compression and expansion of the silicone barrel 10-1.

[0069] Step 6, Overall Assembly and Debugging: Test the overall sealing performance of the sealing device 10. In the deep hole 2, by turning the threaded screw 10-4, test whether the upper and lower loading plates can effectively compress the silicone barrel 10-1, causing it to expand to the hole wall and achieve the sealing effect.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A deep-hole sealing device for fractured surrounding rock with an upward inclination, characterized in that, include: Grouting pipe (4), return grout pipe (5), drain pipe (6) and sealing device (10), the sealing device (10) seals the front of the inclined deep hole (2), the sensor (3) is arranged in the deep hole (2), the lower end of the sensor (3) passes through the sealing device (10), the grouting pipe (4) and the return grout pipe (5) both pass through the sealing device (10) and are inserted to the bottom of the deep hole (2), the sealing device (10) and the deep hole (2) form a receiving cavity, the grout (9) is injected into the receiving cavity through the grouting pipe (4), the drain pipe (6) passes through the sealing device (10) and is inserted into the receiving cavity; The sealing device (10) includes a silicone barrel (10-1), a lower loading plate (10-2), an upper loading plate (10-3), and a threaded screw (10-4). The silicone barrel (10-1) has a compression and expansion function. The lower loading plate (10-2) and the upper loading plate (10-3) are located at both ends of the silicone barrel (10-1). The lower loading plate (10-2), the silicone barrel (10-1), and the upper loading plate (10-3) are combined together by the threaded screw (10-4). The threaded screw (10-4) passes through the end of the lower loading plate (10-2) and is connected to a fixing block (10-5). The silicone barrel (10-1) is provided with a sensor hole (10-9) for the sensor (3) to pass through, a grouting pipe hole (10-6) for the grouting pipe (4) to pass through, a grout return pipe hole (10-7) for the return grout pipe (5) to pass through, a drain pipe hole (10-8) for the drain pipe (6) to pass through, and a threaded screw hole. The lower loading plate (10-2) is provided with a through hole, and the upper loading plate (10-3) is provided with a threaded hole. The threaded screw (10-4) passes through the threaded hole, the threaded screw hole, and the through hole in sequence. The end of the drain pipe (6) inserted into the receiving cavity is close to the inner end face of the sealing device (10), or flush with the inner end face of the sealing device (10).

2. The deep hole sealing device for fractured surrounding rock with an upward inclination as described in claim 1, characterized in that, The silicone bucket (10-1) is made of compressible and expandable silicone material.

3. The deep hole sealing device for fractured surrounding rock with an upward inclination as described in claim 1, characterized in that, The end of the grouting pipe (4) is a right-angle elbow pipe with the pipe opening tilted downwards.

4. A grouting installation method for an upward-dipping deep-hole sensor in fractured surrounding rock, characterized in that, Using the fractured surrounding rock up-inclined deep hole sealing device as described in any one of claims 1-3 includes the following steps: Step 1, Drill Hole Cleaning: After the drilling of the deep hole (2) is completed, the deep hole (2) is thoroughly cleaned; Step 2, Sensor (3) and Pipeline Pre-installation: Pass the sensor (3), grouting pipe (4), return grout pipe (5) and drainage pipe (6) through the sealing device (10) and push them into the predetermined position of the deep hole (2); Step 3, Installation of sealing device (10): Push the sealing device (10) into the front of the deep hole (2), and compress and expand the silicone barrel (10-1) by turning the threaded screw (10-4) of the sealing device (10) to block the deep hole (2) and perform preliminary sealing; Step 4, Water Injection Test: After sealing, first block the drain pipe (6), inject water through the grouting pipe (4), and check whether water flows out of the return grout pipe (5); if there is leakage or the return grout pipe (5) does not produce water for a long time, adjust the threaded screw (10-4) to loosen the sealing device (10), adjust the sealing position, move the sealing position slightly into the deep hole (2), seal again, and re-inject water until water comes out of the return grout pipe (5), then the sealing is successful; loosen the drain pipe (6) to release the accumulated water; Step 5, Grouting: After confirming successful sealing, inject grout (9) through grouting pipe (4). When grout (9) flows out of return grout pipe (5), it indicates that the deep hole (2) has been filled with grout (9) and the sealing effect is good. Step 6, Disassembly of sealing device (10): Loosen the silicone barrel (10-1) by adjusting the threaded screw (10-4), and take out the sealing device (10) for reuse; Step 7: Sensor (3) data acquisition: The sensor (3) is connected to the host to acquire data in order to monitor and analyze the parameter changes in the deep hole of the deep fractured surrounding rock.

5. The grouting installation method for an upward-tilting deep-hole sensor in fractured surrounding rock according to claim 4, characterized in that, The sealing device (10) is formed by casting liquid silicone using a mold. The mold includes an outer cylinder (11-0), an inner cylinder (11-1), a lower pressure plate (11-2), an upper pressure plate (11-3), a threaded screw pre-drilled hole (11-4), a fixing rod (11-5), a grouting pipe pre-drilled hole (11-6), a return grouting pipe pre-drilled hole (11-7), a drainage pipe pre-drilled hole (11-8), a silicone injection port (11-9), and a silicone observation port (11-10). The outer cylinder (11-0) is fitted over the inner cylinder (11-1). Both the outer cylinder (11-0) and the inner cylinder (11-1) are connected between the lower pressure plate (11-2) and the upper pressure plate (11-3). The plate (11-2) and the upper pressure plate (11-3) are connected by multiple fixing rods (11-5). There is a casting space between the inner cylinder (11-1) and the outer cylinder (11-0). The upper pressure plate (11-3) is provided with a threaded screw reserved hole (11-4), a grouting pipe reserved hole (11-6), a return grouting pipe reserved hole (11-7), a drainage pipe reserved hole (11-8), a silicone injection port (11-9), and a silicone observation port (11-10). The lower pressure plate (11-2) is provided with blind holes corresponding to the threaded screw reserved hole (11-4), the grouting pipe reserved hole (11-6), the return grouting pipe reserved hole (11-7), and the drainage pipe reserved hole (11-8).

6. The grouting installation method for an upward-tilting deep-hole sensor in fractured surrounding rock according to claim 5, characterized in that, The lower pressure plate (11-2) is provided with a first groove and a second groove, the upper pressure plate (11-3) is provided with a third groove and a through hole in the middle, the two ends of the outer cylinder (11-0) are engaged in the first groove and the third groove, one end of the inner cylinder (11-1) is engaged in the second groove, and the other end is engaged in the through hole.

7. The grouting installation method for an upward-dipping deep-hole sensor in fractured surrounding rock according to claim 6, characterized in that, The preparation process of the sealing device (10) includes the following steps: Step 1, Mold Preparation: Align the grooves of the outer cylinder (11-0), inner cylinder (11-1), lower pressure plate (11-2), and upper pressure plate (11-3) with the grooves, and assemble them into a mold using multiple fixing rods (11-5); insert rods of the same diameter into the threaded screw pre-drilled holes (11-4), grouting pipe pre-drilled holes (11-6), return grouting pipe pre-drilled holes (11-7), and drainage pipe pre-drilled holes (11-8) provided on the mold to avoid silicone filling; Step 2, Silicone Injection: Apply release agent to the inner wall of the outer cylinder (11-0) and the outer wall of the inner cylinder (11-1). Inject liquid silicone into the casting space between the outer cylinder (11-0) and the inner cylinder (11-1) through the silicone injection port (11-9). During the injection process, observe the liquid level and filling status of the silicone through the silicone observation port (11-10) to ensure that the silicone evenly fills the internal space of the mold. Step 3, Silicone Curing: After injecting the silicone, let the mold stand to allow the silicone to cure naturally; Step 4, Demolding: After the silicone has fully cured, remove all parts of the mold and take out the molded silicone bucket (10-1); check the integrity of the silicone bucket (10-1) and the molding quality of the injection pipe hole (10-6), return pipe hole (10-7), drainage pipe hole (10-8), and sensor hole (10-9). Step 5: Installation of upper and lower loading plates and threaded screw (10-4): Assemble the lower loading plate (10-2), silicone barrel (10-1), and upper loading plate (10-3) in the design sequence, ensuring that the threaded screw (10-4) passes through the threaded hole of the upper loading plate (10-3), the threaded screw hole of the silicone barrel (10-1), and the through hole of the lower loading plate (10-2). Fix a fixing block (10-5) at the end of the threaded screw (10-4) to ensure that the rotation of the threaded screw (10-4) can smoothly adjust the compression and expansion of the silicone barrel (10-1). Step 6, Overall assembly and debugging: Test the overall sealing performance of the sealing device (10). In the deep hole (2), test whether the upper and lower loading plates can effectively compress the silicone barrel (10-1) by turning the threaded screw (10-4) to expand it to the hole wall and achieve the sealing effect.

Images