Water flowing crack blocking method and equipment

Abstract

The invention provides a water flowing fracture blocking method. The water flowing fracture blocking method comprises the steps that a drill bit is controlled to excavate to a preset blocking position; and the jet liquid is pressurized through the pressure device, so that the jet liquid carries out surrounding rock crushing on the rock mass around the plugging position, and a plugging space is formed. And a refrigerant is injected into the plugging space, so that the jet liquid is cooled to be below the melting point. And cement mortar is injected into the plugging space until all jet liquid in the plugging space is replaced by the cement mortar. The drilling hole is formed, the rock mass is subjected to jet breaking at the preset plugging position, the plugging space is formed, then the jet liquid is cooled through the refrigerant, the jet liquid is solidified and expands, the rock mass around the plugging space is extruded, the water flowing fractures are sealed after being extruded, and therefore plugging of the water flowing fractures is achieved. And finally, the plugged space is fixed in the mode of grouting the plugged space, and therefore plugging of the unexposed water flowing fractures is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of stratum grouting, and in particular to a method and equipment for plugging water-conducting fractures. Background Art

[0002] Grouting is an effective method to improve the surrounding rock structure and mechanical properties of rock mass, significantly improve the strength and impermeability of broken rock mass, and improve the safety of underground projects. It has been widely used in the development and utilization of underground spaces such as mining and tunnels. In practice, the effectiveness of grouting depends on whether the water-conducting fissures can be completely blocked. However, the existing grouting technology can only block the exposed stratum fissures, and often cannot achieve the treatment effect for the unexposed fissures. Summary of the invention

[0003] In view of this, the purpose of the present application is to provide a method and device for plugging water-conducting fractures.

[0004] Based on the above purpose, the present application provides a method for sealing water-conducting fissures, comprising: controlling a drill bit to advance to a preset sealing position. Pressurizing a jet liquid through a pressure device so that the jet liquid crushes the surrounding rock mass around the sealing position to form a sealing space. The jet liquid is mixed with the crushed rock mass in the sealing space. A refrigerant is injected into the sealing space to cool the jet liquid to below the melting point. Cement mortar is injected into the sealing space until all the jet liquid in the sealing space is replaced by cement mortar.

[0005] In some embodiments, controlling the drill bit to advance to a preset plugging position specifically includes: opening a vertical section drill hole at a preset drilling position until the drilling depth reaches a preset excavation depth. Controlling the drill bit to build a deflection along a preset deflection trajectory until the excavation direction of the drill bit points to the plugging position. Controlling the drill bit to excavate to the plugging position along the excavation direction after the deflection.

[0006] In some embodiments, after the drilling depth reaches the preset excavation depth, the method further includes: installing a casing into the drilled hole and fixing the casing, wherein the outer diameter of the casing is smaller than the inner diameter of the drilled hole.

[0007] In some embodiments, the jet liquid is pressurized by a pressure device so that the jet liquid crushes the rock mass around the blocking position to form a blocking space, which specifically includes: moving the jet port of the pressure device to the blocking position to block the borehole. The pressure device is controlled to pressurize the jet liquid so that the jet liquid is ejected from the jet port. The jet port is controlled to rotate and spray the jet liquid toward the inner wall of the borehole until a blocking space is formed at the blocking position. The blocking space is an annular space sleeved outside the borehole.

[0008] The present application also provides a water-conducting fissure plugging device, including: a drill bit, a power unit, a pressure device, a refrigerant filling device, a grouting device and a jet device. The power unit is connected to the side of the drill bit away from the excavation surface of the drill bit, and is used to drive the drill bit to drill a hole and excavate to a preset plugging position. The jet device is arranged on the side of the excavation surface away from the drill bit, and is used to spray liquid around the plugging position. The pressure device is connected to the jet device, and is used to pressurize the jet liquid so that the jet liquid is ejected from the jet device to form a plugging space. The refrigerant filling device is connected to the jet device, and is used to inject refrigerant into the jet device so that the refrigerant flows into the plugging space. The grouting device is connected to the jet device, and is used to inject cement mortar into the jet device so that the cement mortar replaces the liquid in the plugging space.

[0009] In some embodiments, the drill bit further comprises a positioning device and a position adjustment device. The positioning device is used to obtain the position of the drill bit, and the position adjustment device is used to adjust the excavation direction of the drill bit so that the drill bit excavates to the blocking position.

[0010] In some embodiments, the position adjustment device includes at least four protrusions. The at least four protrusions are arranged on a side away from the excavation face of the drill bit and are evenly arranged along the outer peripheral surface of the drill bit, and are used to adjust the protrusion heights of the at least four protrusions according to a preset excavation direction so that the excavation face of the drill bit is tilted toward the excavation direction.

[0011] In some embodiments, the drill bit further comprises a water stopper, which is arranged between the power unit and the injection device and is used to block the gap between the drill bit and the borehole.

[0012] In some embodiments, the injection device includes a rotating mechanism and at least two injection ports. The rotating mechanism is used to drive the at least two injection ports to rotate around the central axis of the drill bit, and the at least two injection ports are used to inject jet liquid, refrigerant and cement mortar.

[0013] In some embodiments, the number of the injection ports is 3, and the jet liquid, refrigerant and cement mortar are respectively ejected from the 3 injection ports.

[0014] As can be seen from the above, the water-conducting fissure plugging method provided by the present application is to open a borehole, and jet-crush the rock mass at a preset plugging position to form a plugging space, and then cool the jet liquid through a refrigerant to solidify and expand the jet liquid, squeeze the rock mass around the plugging space, and seal the water-conducting fissure after being squeezed, thereby achieving the plugging of the water-conducting fissure. Finally, the plugging space is fixed by grouting into the plugging space, thereby achieving the plugging of the unexposed water-conducting fissure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 A schematic diagram of a flow chart of a water-conducting fissure plugging method provided in an embodiment of the present application;

[0017] Figure 2 A schematic diagram of a process of excavating to a blocking position provided in an embodiment of the present application;

[0018] Figure 3 A schematic diagram of the flow chart of the jet method provided in the embodiment of the present application;

[0019] Figure 4 A schematic diagram of the structure of a water-conducting fissure plugging device provided in an embodiment of the present application;

[0020] Figure 5 A schematic diagram of the stratum structure after drilling a hole according to the method provided in the embodiment of the present application;

[0021] Figure 6 A schematic diagram of the formation structure during jet crushing according to the method provided in the embodiment of the present application;

[0022] Figure 7 A schematic diagram of the stratum structure during freezing according to the method provided in the embodiment of the present application;

[0023] Figure 8 This is a schematic diagram of the stratum structure after grouting is completed according to the method provided in an embodiment of the present application.

[0024] Figure numerals: 1-drill bit; 11-positioning device; 12-position adjustment device; 121-protrusion; 13-water stopper; 2-injection device; 21-rotation mechanism; 22-injection port. DETAILED DESCRIPTION

[0025] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0026] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0027] like Figure 1 As shown, the present application provides a method for plugging water-conducting fractures, comprising:

[0028] Step S1, controlling the drill bit to advance to a preset blocking position.

[0029] Step S2, pressurizing the jet liquid by a pressure device, so that the jet liquid crushes the rock mass around the blocking position to form a blocking space, wherein the jet liquid is mixed with the crushed rock mass in the blocking space.

[0030] Step S3, injecting refrigerant into the sealed space to cool the jet liquid to below the melting point.

[0031] Step S4, injecting cement mortar into the plugging space until all the jet liquid in the plugging space is replaced by the cement mortar.

[0032] In this embodiment, if Figure 5 As shown, by making the drill advance to the preset blocking position, the water-conducting fissure can be blocked at the preset blocking position. Preferably, the blocking position can be set in the middle of multiple water-conducting fissures that have been explored, and the drill hole is set roughly perpendicular to the water-conducting fissure, so that in a single blocking operation, multiple water-conducting fissures in front of and behind the blocking space can be blocked.

[0033] like Figure 6 As shown, the jet liquid is used to crush the surrounding rock perpendicular to the drilling direction at the plugging position and mix with the crushed rock mass, thereby forming a plugging space with a specific shape filled with crushed rock mass and jet liquid. The type of jet liquid is not limited and can be reasonably selected according to actual application needs.

[0034] Preferably, in order to reduce the use cost of the jet liquid, the jet liquid can be water.

[0035] like Figure 7 As shown, the refrigerant is used to cool the jet liquid, causing the jet liquid to condense and expand, thereby squeezing the inner wall of the sealing space, thereby achieving the purpose of squeezing the rock mass to seal the water-conducting fractures. The type of refrigerant is not limited and can be reasonably selected according to actual application needs. For example, it can be one of liquid nitrogen, dry ice and liquid argon.

[0036] Preferably, in order to achieve stronger fluidity and reduce the cost of using the refrigerant, the refrigerant may be liquid nitrogen.

[0037] like Figure 8 As shown in the figure, since the formation temperature is usually high, the jet liquid will melt after solidification, which will cause the blocked water-conducting fissures to rebound. Therefore, cement grouting is also required to reinforce the blocking space. By continuously introducing cement mortar to exchange heat with the solidified jet liquid, the jet liquid is accelerated to melt and gradually replaced by cement mortar. After the cement mortar is solidified, the blocking space is fixed.

[0038] In some embodiments, Figure 2 As shown, step S1 specifically includes:

[0039] Step S11, drilling a vertical section at a preset drilling position until the drilling depth reaches a preset excavation depth.

[0040] Step S12, controlling the drill bit to build inclination along a preset inclination trajectory until the excavation direction of the drill bit points to the blocking position.

[0041] Step S13, controlling the drill bit to advance along the excavation direction after the deflection to the blocking position.

[0042] In this embodiment, since the water-conducting fissures to be blocked are distributed in a direction perpendicular to the horizontal plane, Figure 5 As shown, it is necessary to open a drill hole in a direction perpendicular to the water-conducting fissures so that the sealing space can be opened in parallel with the water-conducting fissures. When the jet liquid is frozen, the jet liquid expands in a direction perpendicular to the water-conducting fissures, thereby pressing and sealing the water-conducting fissures.

[0043] Therefore, in actual application, in order to realize the opening of horizontal boreholes, it is necessary to first open vertical boreholes, excavate to the preset vertical section depth, and then continue to dig forward by creating an inclination until the central axis of the drill bit points to the preset blocking position, and then start excavating towards the blocking position at a nearly horizontal angle until it reaches the preset blocking position.

[0044] As an optional implementation method, in actual application, after the vertical section is excavated, the focus of the vertical section drilling is used as the starting point of the deflection section drilling, and the vertical height of the deflection section needs to meet 2 = Among them, h2 is the vertical height required for the inclined section.

[0045] The end point of the deflection section is the starting point of the layer-following section. The plugging space is constructed by continuously excavating the drill bit to the plugging position. There can be multiple plugging positions and plugging spaces. The length of the rock layer that can be treated in each plugging space is L, which satisfies the formula Among them, k is the freezing expansion coefficient of the jet liquid, L2 is the length of the jet breakup section, and φ is the porosity of the treatment area.

[0046] In some embodiments, after step S11, the method further includes:

[0047] Step S111, installing a casing into the borehole and fixing the casing, wherein the outer diameter of the casing is smaller than the inner diameter of the borehole.

[0048] In this embodiment, the casing is used to support the vertical section to prevent the vertical section borehole from being damaged during the plugging process.

[0049] As an optional implementation, the vertical section is drilled with a 311mm diameter drill bit. After entering the complete bedrock for 10m, a 273mm casing is lowered and cement is used to fix the pipe in the entire hole. After the strength reaches the standard, a 215mm drill bit is used to drill. After reaching the designed end hole position of the vertical section, a 168mm casing is lowered and cement is used to fix the pipe in the entire hole, and the well is washed. The end hole position is the starting point of the inclination section.

[0050] In some embodiments, Figure 3 As shown, step S2 specifically includes:

[0051] Step S21, moving the injection port of the pressure device to a blocking position to block the drill hole.

[0052] Step S22, controlling the pressure device to pressurize the jet liquid so that the jet liquid is ejected from the ejection port.

[0053] Step S23, controlling the injection port to rotate and inject the jet liquid toward the inner wall of the borehole until a blocking space is formed at the blocking position, wherein the blocking space is an annular space sleeved outside the borehole.

[0054] In this embodiment, the pressure device is used to pressurize the jet liquid, so as to crush the rock mass around the blocking position. The jet port is controlled to perform rotational jetting on the inner wall of the borehole, thereby forming an annular blocking space, and the jet liquid in the annular blocking space is cooled and expanded and solidified, so that the stress generated by the expansion is directed in a direction perpendicular to the water-conducting fracture, thereby directionally squeezing the rock mass and reducing the impact of the solidified jet liquid on the rock mass in other directions.

[0055] As can be seen from the above embodiments of the present application, the present application forms a blocking space by opening a borehole and jet-breaking the rock mass at a preset blocking position, and then cools the jet liquid through a refrigerant, causing the jet liquid to solidify and expand, and squeezes the rock mass around the blocking space, so that the water-conducting fissures are squeezed and closed, thereby achieving the blocking of the water-conducting fissures. Finally, the blocking space is fixed by grouting into the blocking space, thereby achieving the blocking of the unexposed water-conducting fissures.

[0056] like Figure 4 As shown, the present application also provides a water-conducting fracture plugging device, including: a drill bit 1, a power unit, a pressure device, a refrigerant filling device, a grouting device and a jetting device 2.

[0057] The power unit is connected to a side of the drill bit 1 away from the excavation face of the drill bit 1, and is used to drive the drill bit 1 to drill a hole and excavate to a preset blocking position.

[0058] The injection device 2 is arranged on a side of the excavation face away from the drill bit 1, and is used to inject liquid around the blocking position.

[0059] The pressure device is connected to the injection device 2 and is used to pressurize the jet liquid so that the jet liquid is ejected from the injection device 2 to form a blocked space.

[0060] The refrigerant filling device is connected to the injection device 2 and is used to inject refrigerant into the injection device 2 so that the refrigerant flows into the blocked space.

[0061] The grouting device is connected to the injection device 2 and is used to inject cement mortar into the injection device 2 so that the cement mortar replaces the liquid in the sealed space.

[0062] In this embodiment, the power unit is used to provide a driving force and a rotational force to the drill bit 1, so that the drill bit 1 can be excavated to a preset blocking position.

[0063] The injection device 2 is used for injecting jet liquid, refrigerant and cement mortar around the borehole. The injection device 2 also includes at least one injection port 22 for allowing the liquid to be injected to flow out from the injection port 22 .

[0064] Preferably, the number of injection ports 22 is the same as the type of liquid to be injected into the borehole. By providing dedicated injection ports 22 and corresponding delivery pipelines for different types of liquids to be injected, corresponding injection ports 22 and pipelines can be used for different types of liquids, thereby avoiding mixing or damage to the pipeline and injection ports 22 when injecting different types of liquids.

[0065] The pressure device is used to pressurize the jet liquid so that the jet liquid is ejected at high speed from the ejection port 22 of the ejection device 2, thereby breaking the rock formation around the blocking position.

[0066] The refrigerant filling device is used to fill the injection device 2 with refrigerant, so that the refrigerant can flow into the sealed space to cool the temperature of the injection liquid to below the freezing point.

[0067] Preferably, the refrigerant may be a cryogenic liquid. The type of the cryogenic liquid is not limited and may be one of liquid nitrogen, liquid carbon dioxide and liquid argon. A reasonable selection may be made according to actual application requirements.

[0068] The grouting device is used to inject cement mortar into the injection device 2, so that the cement mortar exchanges heat with the solidified jet liquid, so that the jet liquid melts and is replaced by the cement mortar. After the cement mortar solidifies, the cement mortar provides support for the sealed space to prevent the reduction of internal stress in the bottom layer from causing the water-conducting cracks to form again.

[0069] As an optional implementation, the power unit can be a high-performance drilling rig with a thrust range of 0 to 20,000 KN, which can be adjusted according to the hardness of the formation, and a speed range of 0 to 300 r / min, which can be adjusted according to the drilling speed and formation characteristics. The power unit is equipped with a thrust display, a speed display, and a drilling trajectory display. The display has a resolution of 1920x1080 pixels and a high-definition display to ensure that the information is clearly visible. The thrust display can display the thrust of the drilling rig in real time to help operators adjust the drilling pressure; the speed display is used to monitor the rotation speed of the drilling rig to ensure the stable output of the rotary jet system; and the drilling trajectory display is a key information receiving center, which receives data from the directional unit and displays the trajectory of the borehole in real time, so that the operator can accurately grasp the drilling progress and direction.

[0070] As an optional embodiment, the injection device may include at least two injection ports, which can realize high-pressure injection of water, cement slurry, two-liquid cement slurry, liquid nitrogen, etc., and the injection port is dedicated for injecting liquid nitrogen. The injection device is installed on the rotating shaft of the drill pipe, and the rotating shaft allows the injection port to maintain the same direction during the rotation of the drill bit.

[0071] As an optional embodiment, the pressure device may include a jet port on a rotary jet grouting integrated drill bit;

[0072] The radius of rock jetting satisfies the formula:

[0073]

[0074] Where: r is the radius of jet rock crushing, m; V is the water volume m3; d is the nozzle diameter, m; p is the injection pressure, MPa; σk is the rock strength parameter, which depends on the occurrence conditions and mechanical parameters; ω is the angular velocity of drill bit rotation, rad / s.

[0075] The radius of the jet rock crushing can be adjusted according to the lithology of the jet area and the radius required by the project.

[0076] In some embodiments, the drill bit 1 further includes a positioning device 11 and a position adjustment device 12 .

[0077] The positioning device 11 is used to obtain the position of the drill bit 1, and adjust the excavation direction of the drill bit 1 through the position adjustment device 12, so that the drill bit 1 excavates to the blocking position.

[0078] In this embodiment, since it is necessary to incline the borehole during the excavation process so that the drill bit 1 can advance to the correct blocking position, in order to achieve the incline of the borehole, a position adjustment device 12 is required to be provided to deflect the drill bit 1 toward the blocking position; in order to enable the drill bit 1 to accurately reach the preset blocking position, a positioning device 11 is also required to be installed on the drill bit 1, so as to adjust the excavation direction of the drill bit 1 in time.

[0079] As a preferred embodiment, the positioning device 11 is equipped with at least two high-precision GPS locators. The accuracy of these locators is ≤5m, and they can send the precise position information of the drill bit to the power unit in real time, providing the operator with an accurate reference for the drilling position. The data transmission frequency is 1Hz, and the data is transmitted in real time to ensure the timeliness of the information. Through GPS positioning, the operator can monitor the movement trajectory of the drill bit in real time to ensure the accuracy of the drilling operation.

[0080] In some embodiments, the position adjustment device 12 includes at least four protrusions 121 .

[0081] At least four protrusions 121 are arranged on a side away from the excavation face of the drill bit 1 and are evenly arranged along the outer circumference of the drill bit 1, and are used to adjust the protruding height of the at least four protrusions 121 according to a preset excavation direction so that the excavation face of the drill bit 1 is tilted toward the excavation direction.

[0082] In this embodiment, the position adjustment device 12 supports the drill bit 1 through at least four protrusions 121, so that the excavation surface of the drill bit 1 faces the preset excavation direction for excavation.

[0083] As a preferred embodiment, the diameter of the raised portion 121 is 50 mm (a common specification, providing sufficient deflecting force), and the material is high-strength alloy steel (large elastic modulus, not easy to deform). The remote control response time of the raised portion 121 is ≤1s, and the quick response ensures timely adjustment of the drilling trajectory. The angle between the extended lines of the axes of the four raised portions 121 is 90°, and they are located on the same plane, which is perpendicular to the axis of the drill bit 1. This design enables the drill bit 1 to maintain a stable posture during the drilling process. More advanced is that the four raised portions 121 can move up and down along the radial direction of the drill bit 1, with an adjustment range of 0-20 mm, and can be precisely adjusted according to actual needs. By precisely controlling the height of the four raised portions 121, the operator can achieve flexible control of the drilling trajectory. When the drill bit 1 needs to deflect in a certain direction, it is only necessary to lower the raised portion 121 in that direction so that the drill bit 1 is subject to less resistance in that direction, thereby achieving deflection. The deflection angle satisfies the formula Wherein, h1 is the height of the protrusion, and l is the length of the drill bit 1. The protrusion 121 is mounted on the rotating shaft of the drill rod, and the rotating shaft allows the protrusion 121 to maintain a constant direction during the rotation of the drill bit 1.

[0084] In some embodiments, the drill bit 1 further includes a water stopper 13 .

[0085] The water stopper 13 is disposed between the power unit and the injection device 2 to seal the gap between the drill bit 1 and the drill hole.

[0086] In this embodiment, the water stopper 13 is used to seal the borehole. When the jet liquid is sprayed, the borehole is sealed to prevent the jet liquid from overflowing from the borehole entrance.

[0087] As a preferred embodiment, the water stopper 13 can be made of rubber and can be inflated. When not inflated, it shrinks inside the drill bit 1 and its outer wall is not higher than the outer wall of the drill bit 1 .

[0088] In some embodiments, the injection device 2 includes a rotating mechanism 21 and at least two injection ports 22 .

[0089] The rotating device is used to drive at least two injection ports 22 to rotate around the central axis of the drill bit 1, and the at least two injection ports 22 are used to inject jet liquid, refrigerant and cement mortar.

[0090] In this embodiment, by providing corresponding injection ports 22 , dedicated injection channels can be provided for different types of liquids, thereby preventing the injection ports 22 from being blocked.

[0091] In some embodiments, the number of the injection ports 22 is three, and the jet liquid, refrigerant, and cement mortar are respectively ejected from the three injection ports 22 .

[0092] In this embodiment, three injection ports 22 are provided so that the jet liquid, refrigerant and cement mortar are ejected through the dedicated injection ports 22 , thereby preventing the injection ports 22 from being blocked.

[0093] It should be noted that the above describes some embodiments of the present application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0094] It should be noted that the embodiments of the present application can be further described in the following manner:

[0095] A method for plugging a water-conducting fracture, comprising:

[0096] Control the drill bit to advance to the preset blocking position.

[0097] The jet liquid is pressurized by a pressure device, so that the jet liquid crushes the surrounding rock mass around the blocking position to form a blocking space, wherein the jet liquid is mixed with the crushed rock mass in the blocking space.

[0098] Refrigerant is injected into the sealed space to cool the jet liquid to below the melting point.

[0099] Inject cement mortar into the plugging space until all the jet liquid in the plugging space is replaced by the cement mortar.

[0100] Optionally, controlling the drill bit to advance to a preset blocking position specifically includes:

[0101] A vertical section is drilled at the preset drilling position until the drilling depth reaches the preset excavation depth.

[0102] The drill bit is controlled to build inclination along a preset inclination trajectory until the excavation direction of the drill bit points to the blocking position.

[0103] Control the drill bit to advance along the excavation direction after deflection to the blocking position.

[0104] Optionally, after the drilling depth reaches a preset excavation depth, the following steps are further included:

[0105] A casing is installed in the borehole and fixed, wherein the outer diameter of the casing is smaller than the inner diameter of the borehole.

[0106] Optionally, the jet liquid is pressurized by a pressure device so that the jet liquid breaks the surrounding rock mass around the plugging position to form a plugging space, specifically including:

[0107] Move the injection port of the pressure device to the blocking position to block the drill hole.

[0108] The pressure device is controlled to pressurize the jet liquid so that the jet liquid is ejected from the ejection port.

[0109] The jet port is controlled to rotate and spray the jet liquid toward the inner wall of the borehole until a blocking space is formed at the blocking position, wherein the blocking space is an annular space sleeved outside the borehole.

[0110] A water-conducting fissure plugging device comprises: a drill bit, a power unit, a pressure device, a refrigerant filling device, a grouting device and a jetting device.

[0111] The power unit is connected to the side of the drill bit away from the excavation face of the drill bit, and is used to drive the drill bit to drill a hole and excavate to a preset blocking position.

[0112] The injection device is arranged on a side of the excavation face away from the drill bit, and is used for injecting liquid around the blocking position.

[0113] The pressure device is connected to the injection device and is used for pressurizing the injection liquid so that the injection liquid is ejected from the injection device to form a blocked space.

[0114] The refrigerant filling device is connected to the injection device and is used for injecting refrigerant into the injection device so that the refrigerant flows into the blocked space.

[0115] The grouting device is connected to the injection device and is used to inject cement mortar into the injection device so that the cement mortar replaces the liquid in the sealing space.

[0116] Optionally, the drill bit also includes a positioning device and a position adjusting device.

[0117] The positioning device is used to obtain the position of the drill bit, and adjust the excavation direction of the drill bit through the position adjustment device so that the drill bit can be excavated to the blocking position.

[0118] Optionally, the position adjustment device includes at least 4 protrusions.

[0119] At least four protrusions are arranged on one side away from the excavation face of the drill bit and are evenly arranged along the outer peripheral surface of the drill bit, and are used to adjust the protruding height of the at least four protrusions according to a preset excavation direction so that the excavation face of the drill bit is inclined toward the excavation direction.

[0120] Optionally, the drill bit also includes a water stopper.

[0121] The water stopper is arranged between the power unit and the injection device to seal the gap between the drill bit and the drill hole.

[0122] Optionally, the injection device includes a rotating mechanism and at least two injection ports.

[0123] The rotating device is used for driving at least two injection ports to rotate around the central axis of the drill bit, and the at least two injection ports are used for injecting jet liquid, refrigerant and cement mortar.

[0124] Optionally, the number of the injection ports is 3, and the jet liquid, refrigerant and cement mortar are respectively ejected from the 3 injection ports.

[0125] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0126] In addition, to simplify the description and discussion, and in order not to make the embodiments of the present application difficult to understand, the known power supply / ground connection with the integrated circuit (IC) chip and other components may or may not be shown in the provided drawings. In addition, the device can be shown in the form of a block diagram to avoid making the embodiments of the present application difficult to understand, and this also takes into account the fact that the details of the implementation of these block diagram devices are highly dependent on the platform to be implemented in the embodiments of the present application (that is, these details should be fully within the scope of understanding of those skilled in the art). In the case of elaborating specific details (e.g., circuits) to describe exemplary embodiments of the present application, it is obvious to those skilled in the art that the embodiments of the present application can be implemented without these specific details or when these specific details are changed. Therefore, these descriptions should be considered to be illustrative rather than restrictive.

[0127] Although the present application has been described in conjunction with specific embodiments thereof, many alternatives, modifications and variations of these embodiments will be apparent to those skilled in the art in light of the foregoing description.

[0128] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. A method for plugging a water-conducting fissure, comprising: Control the drill bit to advance to the preset blocking position; The jet liquid is pressurized by a pressure device so that the jet liquid crushes the rock mass around the blocking position to form a blocking space; wherein the jet liquid is mixed with the crushed rock mass in the blocking space; injecting a refrigerant into the sealed space to cool the jet liquid to below the melting point; Cement mortar is injected into the blocking space until all the jet liquid in the blocking space is replaced by the cement mortar.

2. The method for plugging water-conducting fissures according to claim 1, wherein: The controlling the drill bit to advance to a preset blocking position specifically includes: Drilling a vertical section at a preset drilling position until the drilling depth reaches the preset excavation depth; Controlling the drill bit to build inclination along a preset inclination trajectory until the excavation direction of the drill bit points to the blocking position; The drill bit is controlled to excavate to the blocking position along the excavation direction after the deflection.

3. The method for plugging water-conducting fissures according to claim 2, wherein: After the drilling depth reaches the preset excavation depth, it also includes: A casing is installed in the borehole and fixed; wherein the outer diameter of the casing is smaller than the inner diameter of the borehole.

4. The method for plugging water-conducting fissures according to claim 1, wherein: The jet liquid is pressurized by a pressure device so that the jet liquid crushes the rock mass around the blocking position to form a blocking space, which specifically includes: Moving the injection port of the pressure device to the blocking position to block the borehole; Controlling the pressure device to pressurize the jet liquid so that the jet liquid is ejected from the ejection port; The injection port is controlled to rotate and spray the jet liquid toward the inner wall of the borehole until a blocking space is formed at the blocking position; wherein the blocking space is an annular space sleeved outside the borehole.

5. A water-conducting fissure plugging device, comprising: Drill bits, power units, pressure devices, refrigerant charging devices, grouting devices and injection devices; The power unit is connected to a side of the drill bit away from the excavation face of the drill bit, and is used to drive the drill bit to drill a hole and excavate to a preset blocking position; The injection device is arranged on a side of the excavation face away from the drill bit, and is used to inject liquid around the blocking position; The pressure device is connected to the injection device and is used to pressurize the injection liquid so that the injection liquid is ejected from the injection device to form a blocked space; The refrigerant filling device is connected to the injection device and is used to inject refrigerant into the injection device so that the refrigerant flows into the blocked space; The grouting device is connected to the injection device and is used to inject cement mortar into the injection device so that the cement mortar replaces the liquid in the blocking space.

6. The water-conducting fissure plugging device according to claim 5, wherein: The drill bit also includes a positioning device and a position adjustment device; The positioning device is used to obtain the position of the drill bit, and adjust the excavation direction of the drill bit through the position adjustment device so that the drill bit excavates to the blocking position.

7. The water-conducting fissure plugging device according to claim 6, wherein: The position adjustment device includes at least 4 protrusions; The at least four protrusions are arranged on a side away from the excavation face of the drill bit and are evenly arranged along the outer peripheral surface of the drill bit, and are used to adjust the protruding height of the at least four protrusions according to a preset excavation direction so that the excavation face of the drill bit is inclined toward the excavation direction.

8. The water-conducting fissure plugging device according to claim 5, wherein: The drill bit also includes a water stopper; The water stopper is arranged between the power unit and the injection device, and is used for blocking the gap between the drill bit and the drill hole.

9. The water-conducting fissure plugging device according to claim 5, wherein the injection device comprises a rotating mechanism and at least two injection ports; The rotating device is used to drive the at least two injection ports to rotate around the central axis of the drill bit, and the at least two injection ports are used to inject the jet liquid, the refrigerant and the cement mortar. 10 . The water-conducting fissure plugging device according to claim 9 , wherein the number of the injection ports is 3, and the jet liquid, the refrigerant and the cement mortar are respectively ejected from the 3 injection ports.

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