Cracked surrounding rock updip type deep hole sealing device and sensor grouting installation method

Abstract

The invention provides a broken surrounding rock updip type deep hole sealing device and a sensor grouting installation method.The device comprises a grouting pipe, a slurry return pipe, a drainage pipe and a hole sealing device, the hole sealing device seals and blocks the front portion of an updip type deep hole, a sensor is arranged in the deep hole, and the lower end of the sensor penetrates out of the hole sealing device; the grouting pipe and the grout return pipe penetrate through the hole sealing device to be inserted into the hole bottom of the deep hole, a containing cavity is formed between the hole sealing device and the deep hole, and the drainage pipe penetrates through the hole sealing device to be inserted into the containing cavity. According to the arrangement mode of the grouting pipe and the grout return pipe, grout can flow from the tail end of the grouting pipe from top to bottom, and it is ensured that the whole deep hole is filled with the grout and even grouting is achieved; if the slurry is lost or bleeding occurs, the slurry can still be supplemented repeatedly. The hole sealing position and the sealing effect of the hole sealing device can be adjusted, tight sealing is ensured, slurry leakage is avoided, and the recycling function is achieved. A reliable technical scheme is provided for upward-inclined deep hole grouting, and the grouting effect of broken surrounding rock and the installation precision of a monitoring device are effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of deep tunnel engineering and underground engineering, and in particular to a fractured surrounding rock up-inclined deep hole sealing device and a sensor grouting installation method. Background Art

[0002] In deep tunnel construction and underground engineering, surrounding rock fragmentation is common, especially in up-tilt deep hole environments. Grouting and hole sealing operations are affected by rock fragmentation and complex geological conditions, often resulting in grout leakage, poor sealing effects, and other issues. This can lead to poor coupling between sensors and surrounding rocks, which in turn affects the accuracy of monitoring data.

[0003] Existing hole sealing devices are difficult to ensure effective sealing in complex and broken surrounding rocks, especially in up-inclined deep holes. Common hole sealing methods frequently cause slurry leakage and slurry failure to fill the entire deep hole during the installation of up-inclined deep hole sensors, making it impossible to achieve a reliable coupling effect and obtain accurate monitoring data. Therefore, a hole sealing device and sensor grouting installation method with simple design, convenient operation and good sealing effect is needed to ensure that the sensor can be tightly coupled with the surrounding rock and accurately collect data. Summary of the invention

[0004] According to the technical problems raised above, a sealing device for up-tilted deep holes in fractured surrounding rocks and a sensor grouting installation method are provided. The present invention can ensure good coupling between the sensor and the surrounding rock, thereby ensuring that the measurement data of the sensor is accurate. The present invention designs a sealing device and a grouting installation method for up-tilted deep holes in fractured surrounding rocks, so that the slurry is evenly distributed in the deep hole and leakage is prevented, ensuring that the sensor can stably contact the surrounding rock and accurately reflect the changes in relevant parameters of the surrounding rock.

[0005] The technical means adopted by the present invention are as follows:

[0006] A sealing device for an up-inclined deep hole in fractured surrounding rock comprises: a grouting pipe, a return grouting pipe, a drain pipe and a sealing device, wherein the sealing device is sealed at the front of the up-inclined deep hole, a sensor is arranged in the deep hole, the lower end of the sensor passes through the sealing device, the grouting pipe and the return grouting pipe both penetrate the sealing device and are inserted to the bottom of the deep hole, a containing cavity is formed between the sealing device and the deep hole, slurry is injected into the containing cavity through the grouting pipe, and the drain pipe penetrates the sealing device and is inserted into the containing 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 arranged at both ends of the silicone barrel, and the lower loading plate, the silicone barrel and the upper loading plate are combined together by a threaded screw. The threaded screw passes through the end of the lower loading plate and is connected to a fixed block.

[0008] Furthermore, the silicone barrel 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 grouting return 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, the upper loading plate is provided with a threaded hole, and 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 pipe, and the pipe opening is inclined downward.

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

[0012] The present invention also provides a method for grouting and installing a fractured surrounding rock up-inclined deep hole sensor, using the fractured surrounding rock up-inclined deep hole sealing device, comprising the following steps:

[0013] Step 1: Borehole cleaning: After the deep hole drilling construction is completed, the deep hole is thoroughly cleaned;

[0014] Step 2: Pre-installation of sensors and pipes: Pass the sensors, grouting pipes, return grouting pipes and drainage pipes through the sealing device and push them into the predetermined position of the deep hole;

[0015] Step 3: Install the sealing device: Push the sealing device into the front of the deep hole, and compress and expand the silicone barrel by screwing the threaded screw of the sealing device to seal the deep hole for preliminary sealing;

[0016] Step 4: Water injection test: After the plugging is completed, first plug the drain pipe, inject water through the grouting pipe, and check whether there is water flowing out of the return grouting pipe; if there is water leakage or the return grouting pipe does not discharge water for a long time, adjust the threaded screw to loosen the sealing device, adjust the sealing position, move the sealing position slightly toward the inside of the deep hole, plug again, and re-inject water until water flows out of the return grouting pipe, then the plugging is successful; loosen the drain pipe to release the accumulated water;

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

[0018] Step 6: Disassemble the sealing device: loosen the silicone barrel by adjusting the threaded screw and take out the sealing device for reuse;

[0019] Step 7: Sensor data acquisition: The sensor is connected to the host computer to collect data to monitor and analyze parameter changes in the deep hole of deep fractured surrounding rock.

[0020] Furthermore, the sealing device is cast by liquid silicone through a mold, and the mold comprises an outer cylinder, an inner cylinder, a lower pressure plate, an upper pressure plate, a reserved hole for threaded screw, a fixing rod, a reserved hole for grouting pipe, a reserved hole for return grouting pipe, a reserved hole for drainage pipe, a silicone injection port and a silicone observation port, the outer cylinder is sleeved outside the inner cylinder, and the outer cylinder and the inner cylinder are both connected between the lower pressure plate and the upper pressure plate, and the lower pressure plate and the upper pressure plate are connected by multiple fixing rods, and a casting space is provided between the inner cylinder and the outer cylinder, and a reserved hole for threaded screw, a reserved hole for grouting pipe, a reserved hole for return grouting pipe, a reserved hole for drainage pipe, a silicone injection port and a silicone observation port are arranged on the upper pressure plate, and blind holes corresponding to the reserved holes for threaded screw, the reserved holes for grouting pipe, the reserved holes for return grouting pipe and the reserved holes for drainage pipe are arranged on the lower pressure plate.

[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 opened in the middle, the two ends of the outer cylinder are clamped in the first groove and the third groove, one end of the inner cylinder is clamped in the second groove, and the other end is clamped in the through hole.

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

[0023] Step 1, mold preparation: Align the outer cylinder and inner cylinder with the grooves of the lower and upper pressure plates, and assemble the mold using multiple fixing rods; plug the reserved holes for threaded screws, grouting pipes, return grouting pipes, and drainage pipes on the mold with rods of the same diameter to avoid silicone filling;

[0024] Step 2, silicone injection: the inner wall of the outer tube and the outer wall of the inner tube are coated with a release agent, and liquid silicone is injected into the casting space between the outer tube and the inner tube through the silicone injection port; during the injection process, the liquid level and filling state of the silicone are observed 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 silicone, let the mold stand to allow the silicone to cure naturally;

[0026] Step 4, demoulding: After the silicone is completely cured, remove the various parts of the mold and take out the molded silicone barrel; check the integrity of the silicone barrel, as well as the molding quality of the grouting pipe hole, return grouting pipe hole, drainage pipe hole, and sensor hole;

[0027] Step 5. Install the upper and lower loading plates and threaded screws: Assemble the lower loading plate, silicone barrel, and upper loading plate in the designed order, ensure that the threaded screws pass through the threaded holes of the upper loading plate, the threaded screw holes of the silicone barrel, and the through holes of the lower loading plate, and fix the fixing block at the end of the threaded screws to ensure that the rotation of the threaded screws can smoothly adjust the compression and expansion of the silicone barrel;

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

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

[0030] The present invention provides a deep hole sealing device and a sensor grouting installation method which are easy to operate, have good sealing effect and are suitable for complex broken surrounding rocks, and are particularly suitable for the installation of sensors in up-inclined deep holes. The design of the grouting pipe and the return grouting pipe ensures that the slurry can fully fill the entire deep hole, and repeated grouting can be performed as needed. The compressible and expandable silicone barrel is in close contact with the hole wall, effectively preventing the slurry from leaking out, thereby ensuring good coupling between the sensor and the surrounding rock, significantly improving the measurement accuracy, and providing accurate data support for deep surrounding rock monitoring. In addition, the sealing device can be easily taken out and reused by adjusting the threaded screw after the slurry solidifies, thereby reducing the cost of equipment use. The device has a simple structure and is easy to operate. It is suitable for deep hole grouting of different specifications, especially under complex broken surrounding rock conditions, and can provide efficient sealing and grouting effects. Its operational flexibility is reflected in the fact that the sealing position and expansion degree can be flexibly adjusted according to actual needs through the adjustment of the threaded screw, ensuring the flexibility and effect control of the construction process.

[0031] Based on the above reasons, the present invention can be widely promoted in the fields of deep hole sensor grouting installation under complex broken surrounding rock conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

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

[0034] Figure 2 The present invention is a schematic diagram of a sealing device for an up-inclined deep hole in a crushed surrounding rock.

[0035] Figure 3 1 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 structural diagram of the mold for preparing the sealing device of the present invention, wherein (a) is an axonometric diagram, (b) is a schematic structural diagram of the upper pressing plate, and (c) is a schematic structural diagram of the lower pressing plate.

[0037] Figure 5 These are physical pictures of the present invention, wherein (a) is a physical picture of casting a silicone barrel using a sealing device mold, and (b) is a physical picture of the sealing device.

[0038] In the figure: 1, broken surrounding rock; 2, deep hole; 3, sensor; 4, grouting pipe; 5, return grouting pipe; 6, drainage pipe; 7, grouting slurry flow route; 8, return grouting route; 9, slurry; 10, sealing device; 10-1, silicone barrel; 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 grouting Pipe hole; 10-8, drainage pipe hole; 10-9, sensor hole; 11-0, outer tube; 11-1, inner tube; 11-2, lower pressure plate; 11-3, upper pressure plate; 11-4, reserved hole for threaded screw; 11-5, fixing rod; 11-6, reserved hole for grouting pipe; 11-7, reserved hole for return grouting pipe; 11-8, reserved hole for drainage pipe; 11-9, silicone injection port; 11-10, silicone observation port. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

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

[0042] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be clear that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0043] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

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

[0045] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0046] like Figure 1 , Figure 2 and Figure 3As shown, the present invention provides an up-inclined deep hole sealing device for fractured surrounding rock, which is suitable for grouting installation of deep hole sensors under complex fractured surrounding rock conditions, and includes a special grouting pipe 4, a return grouting pipe 5, a drain pipe 6, and a sealing device 10. An up-inclined deep hole 2 is drilled on the fractured surrounding rock 1, and a sensor 3 is arranged in the deep hole 2. The sealing device 10 is sealed and blocked at the front of the up-inclined deep hole 2, and the lower end of the sensor 3 passes through the sealing device 10. The grouting pipe 4 and the return grouting pipe 5 are both inserted through the sealing device 10 to the bottom of the up-inclined deep hole 2; a receiving cavity is formed between the sealing device 10 and the deep hole 2, and the drain pipe 6 is inserted through the sealing device 10 into the deep hole 2 (in the receiving cavity), and one end of the drain pipe 6 inserted into the receiving cavity is close to the inner end surface of the sealing device 10, or is flush with the inner end surface of the sealing device 10. Slurry 9 is injected into the receiving cavity through the grouting pipe 4. The sealing device 10 is composed of a silicone barrel 10-1, a lower loading plate 10-2, an upper loading plate 10-3 and a threaded screw 10-4. The lower loading plate 10-2 and the upper loading plate 10-3 are arranged 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 two threaded screws 10-4. The silicone barrel 10-1 is made of compressible and expandable silicone material. 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 return grouting pipe hole 10-7 for the return grouting pipe 5 to pass through, a drainage pipe hole 10-8 for the drainage pipe 6 to pass through and two threaded screw holes. The upper loading plate 10-3 is provided with a threaded hole for passing the threaded screw 10-4, and the threaded screw hole of the lower loading plate 10-2 is a through hole. The threaded screw 10-4 passes through the threaded hole, the threaded screw hole and the through hole in sequence, and the end of the threaded screw 10-4 that passes through the through hole is connected to the fixed block 10-5.

[0047] like Figure 2 As shown, when the sealing device 10 is in use, the threaded screw 10-4 rotates to cause the upper loading plate 10-2 and the lower loading plate 10-3 to compress the silicone barrel 10-1, and 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 the grouting is completed and the slurry 9 solidifies, the compressed silica gel barrel 10-1 is loosened by adjusting the threaded screw 10-4, and the sealing device 10 is taken out to achieve the reuse of the device.

[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 tight sealing and no leakage, so as to improve the sealing effect.

[0050] The special grouting pipe 4 and the return grouting pipe 5 are inserted into the bottom of the upward-inclined deep hole 2, so that the slurry 9 can flow along the grouting slurry flow route 7 from the mouth of the grouting pipe 4 from top to bottom to fill the entire deep hole 2, and the return grouting pipe 5 is used to monitor whether the grouting is full and there is no slurry leakage. If the slurry 9 is lost or seeping, it can be repeatedly replenished through the grouting pipe 4. The return grouting pipe 5 has a return grouting route 8 inside.

[0051] The end of the special grouting pipe 4 is designed to be a right-angle elbow, and the pipe mouth is tilted downward to optimize the flow direction of the slurry 9 and ensure that the deep hole 2 is filled more evenly and thoroughly.

[0052] The arrangement of the grouting pipe and the return grouting pipe of the present invention allows the slurry to flow from the end of the grouting pipe from top to bottom, ensuring that the entire deep hole is filled and grouting is uniform; if the slurry is lost or seeping, it can still be repeatedly replenished. The sealing position and sealing effect of the sealing device can be adjusted to ensure a tight seal, no leakage, and a recovery function. This will provide a reliable technical solution for up-tilt deep hole grouting, effectively improving the grouting effect of the fractured surrounding rock and the installation accuracy of the monitoring device.

[0053] The present invention also provides a method for grouting and installing a fractured surrounding rock up-inclined deep hole sensor, which uses the fractured surrounding rock up-inclined deep hole sealing device and comprises the following steps:

[0054] Step 1: Borehole cleaning: After the drilling of deep hole 2 is completed, deep hole 2 should be thoroughly cleaned to ensure that there is no residue in the hole.

[0055] Step 2: Pre-installation of sensor 3 and pipeline: Connect sensor 3 according to the design, pass sensor 3, grouting pipe 4, return grouting 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 to the inside of the hole, close to the hole opening), and compress and expand the silicone barrel 10-1 by screwing the threaded screw 10-4 of the sealing device 10 to seal the deep hole 2 and achieve 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 grouting pipe hole 10-7, the drainage pipe hole 10-8, and the sensor hole 10-9, thus playing a sealing role.

[0057] Step 4: Water injection test: After the plugging is completed, first plug the drain pipe 6, inject water through the grouting pipe 4, and check whether there is water flowing out of the return grout pipe 5. If there is water leakage or the return grout pipe 5 does not discharge 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 toward the inside of the deep hole 2, plug again, and re-inject water until water flows out of the return grout pipe 5, then the plugging is successful. Loosen the drain pipe 6 to release the accumulated water.

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

[0059] Step 6: Disassembly of the 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 taken out for reuse.

[0060] Step 7: Sensor 3 data acquisition: Sensor 3 is connected to the host computer to collect data to monitor and analyze parameter changes in the deep hole of deep fractured surrounding rock.

[0061] like Figure 4 As shown, the sealing device 10 is cast with liquid silicone through a mold. The mold includes an outer cylinder 11-0, an inner cylinder 11-1, a lower pressing plate 11-2, an upper pressing plate 11-3, a reserved hole for a threaded screw 11-4, a fixing rod 11-5 (a mold fixing forming rod), a reserved hole for a grouting pipe 11-6, a reserved hole for a return grouting pipe 11-7, a reserved hole for a drainage pipe 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 barrel 10-1 meet the sealing requirements. The outer cylinder 11-0 is sleeved on the outer side of the inner cylinder 11-1. The outer cylinder 11-0 and the inner cylinder 11-1 are both 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 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. 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 clamped in the first groove and the third groove, one end of the inner cylinder 11-1 is clamped in the second groove, and the other end is clamped in the through hole.

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

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

[0064] Step 1, mold preparation: Align the outer cylinder 11-0, inner cylinder 11-1 with the grooves of the lower pressing plate 11-2 and upper pressing plate 11-3, and then assemble them using four fixing rods 11-5 to ensure that the various parts of the mold are tightly combined. Plug the threaded screw reserved holes 11-4, grouting pipe reserved holes 11-6, return grouting pipe reserved holes 11-7, and drainage pipe reserved holes 11-8 on the mold with rods of the same diameter to avoid 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 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, monitor the liquid level and filling status of the silicone through the silicone observation port 11-10 to ensure that the silicone fills the internal space of the mold evenly. Observe the change of the silicone liquid level in the casting space through the silicone observation port 11-10. The silicone liquid level gradually rises. When it is about to overflow the silicone observation port 11-10, the silicone fills the entire casting space and the interior is filled with silicone.

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

[0067] Step 4, demoulding: After the silicone is completely cured, remove the various parts of the mold and take out the molded silicone barrel 10-1. Check the integrity of the silicone barrel 10-1, especially the molding quality of the functional holes (grouting pipe hole 10-6, return grouting 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 order. 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, and fix the upper 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.

[0069] Step 6, overall assembly and debugging: Check the overall sealing performance of the sealing device 10. In the deep hole 2, by screwing the threaded screw 10-4, test whether the upper and lower loading plates can effectively compress the silicone barrel 10-1, expand it 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, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements 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 crushed surrounding rock up-tilt, characterized in that: include: A grouting pipe (4), a return grouting pipe (5), a drainage pipe (6) and a hole sealing device (10); the hole sealing device (10) is sealed and blocked at the front of the upward-inclined deep hole (2); a sensor (3) is arranged in the deep hole (2); the lower end of the sensor (3) passes through the hole sealing device (10); the grouting pipe (4) and the return grouting pipe (5) both pass through the hole sealing device (10) and are inserted to the bottom of the deep hole (2); a receiving cavity is formed between the hole sealing device (10) and the deep hole (2); slurry (9) is injected into the receiving cavity through the grouting pipe (4); and the drainage pipe (6) passes through the hole sealing device (10) and is inserted into the receiving cavity.

2. The up-inclined deep hole sealing device for crushed surrounding rock according to claim 1 is characterized in that: The sealing device (10) comprises 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 arranged at two 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 through 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 fixed block (10-5).

3. The up-inclined deep hole sealing device for crushed surrounding rock according to claim 2 is characterized in that: The silica gel barrel (10-1) is made of compressible and expandable silica gel material.

4. The up-inclined deep hole sealing device for crushed surrounding rock according to claim 2 is characterized in that: 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 grouting return pipe hole (10-7) for the return grouting pipe (5) to pass through, a drainage pipe hole (10-8) for the drainage pipe (6) to pass through, and a threaded screw hole; the lower loading plate (10-2) is provided with a through hole; the upper loading plate (10-3) is provided with a threaded hole; and the threaded screw (10-4) passes through the threaded hole, the threaded screw hole, and the through hole in sequence.

5. The up-inclined deep hole sealing device for crushed surrounding rock according to claim 1 is characterized in that: The end of the grouting pipe (4) is a right-angle elbow pipe, and the pipe opening is inclined downward.

6. The up-inclined deep hole sealing device for crushed surrounding rock according to claim 1 is characterized in that: One end of the drainage pipe (6) inserted into the accommodating cavity is close to the inner end surface of the sealing device (10), or is flush with the inner end surface of the sealing device (10).

7. A method for installing a deep hole sensor in an up-tilt manner in a fractured surrounding rock by grouting, characterized in that: The use of the crushed surrounding rock up-inclined deep hole sealing device according to any one of claims 1 to 6 comprises the following steps: Step 1: Borehole cleaning: After the deep hole (2) is drilled, the deep hole (2) is thoroughly cleaned; Step 2: Pre-installation of the sensor (3) and the pipeline: the sensor (3), the grouting pipe (4), the return grouting pipe (5) and the drainage pipe (6) are passed through the sealing device (10) and pushed into the predetermined position of the deep hole (2); Step 3: Installing the 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 twisting the threaded screw (10-4) of the sealing device (10), thereby sealing the deep hole (2) and performing preliminary sealing; Step 4: water injection test: after the plugging is completed, first plug the drain pipe (6), inject water through the grouting pipe (4), and check whether there is water flowing out of the return grout pipe (5); if there is water leakage or the return grout pipe (5) does not discharge water for a long time, adjust the threaded screw (10-4) to loosen the sealing device (10), adjust the sealing position, and slightly move the sealing position toward the inside of the deep hole (2), plug again, and re-inject water until water flows out of the return grout pipe (5), then the plugging is successful; loosen the drain pipe (6) to release the accumulated water; Step 5, grouting: After confirming that the sealing is successful, inject slurry (9) through the grouting pipe (4). When the slurry (9) flows out of the return grouting pipe (5), it indicates that the deep hole (2) has been filled with the slurry (9) and the sealing effect is good; Step 6: Disassembling the 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 collect data to monitor and analyze parameter changes in the deep hole of the deep fractured surrounding rock.

8. The method for grouting and installing a deep hole sensor in an up-tilt fractured surrounding rock according to claim 7 is characterized in that: The sealing device (10) is cast with liquid silicone through a mold, and the mold comprises 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 reserved hole (11-4), a fixing rod (11-5), 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 outer cylinder (11-0) is sleeved outside the inner cylinder (11-1), and the outer cylinder (11-0) and the inner cylinder (11-1) are both connected between the lower pressure plate (11-2) and the upper pressure plate (11-3). The plate (11-2) and the upper pressing plate (11-3) are connected by a plurality of fixing rods (11-5); a casting space is provided between the inner tube (11-1) and the outer tube (11-0); a threaded screw rod 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 silica gel injection port (11-9) and a silica gel observation port (11-10) are provided on the upper pressing plate (11-3); and blind holes corresponding to the threaded screw rod 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) are provided on the lower pressing plate (11-2).

9. The method for grouting and installing a deep hole sensor in an up-tilt fractured surrounding rock according to claim 8 is characterized in that: The lower pressing plate (11-2) is provided with a first groove and a second groove, the upper pressing plate (11-3) is provided with a third groove and a through hole opened in the middle, the two ends of the outer cylinder (11-0) are clamped in the first groove and the third groove, one end of the inner cylinder (11-1) is clamped in the second groove, and the other end is clamped in the through hole.

10. The method for grouting and installing a deep hole sensor in an up-tilt fractured surrounding rock according to claim 9, characterized in that: The preparation process of the sealing device (10) comprises the following steps: Step 1, mold preparation: the outer cylinder (11-0), the inner cylinder (11-1) are aligned with the grooves of the lower pressing plate (11-2) and the upper pressing plate (11-3), and a plurality of fixing rods (11-5) are used to assemble the mold; 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) provided on the mold are plugged with rods of the same diameter to avoid silicone filling; Step 2, silicone injection: the inner wall of the outer cylinder (11-0) and the outer wall of the inner cylinder (11-1) are coated with a release agent, and liquid silicone is injected 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, the liquid level and filling state of the silicone are observed through the silicone observation port (11-10) to ensure that the silicone uniformly fills the internal space of the mold; Step 3, silicone curing: After injecting silicone, let the mold stand to allow the silicone to cure naturally; Step 4, demoulding: After the silicone is completely cured, remove the various components of the mold and take out the molded silicone barrel (10-1); check the integrity of the silicone barrel (10-1), as well as the molding quality of the grouting pipe hole (10-6), the return grouting pipe hole (10-7), the drainage pipe hole (10-8), and the sensor hole (10-9); Step 5, installation of the upper and lower loading plates and the threaded screw (10-4): Assemble the lower loading plate (10-2), the silicone barrel (10-1), and the upper loading plate (10-3) together according to the design 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), and fix the upper 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: Inspect the overall sealing performance of the sealing device (10). In the deep hole (2), by rotating the threaded screw (10-4), test whether the upper and lower loading plates can effectively compress the silicone barrel (10-1) to expand it to the hole wall and achieve the sealing effect.

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