Water flowing fractured zone detection device and detection method

Abstract

The invention provides a water flowing fractured zone detection device and method, and the device comprises a water pipe which is provided with a water inlet section and a water outlet section which are sequentially arranged, and the water outlet section is used for injecting water into a detection hole in a rock stratum; the bag is arranged on the periphery of the water pipe in a sleeving manner, and the radial size of the bag is variable, so that the bag can be attached to the inner wall of the detection hole to block the detection hole; the adjusting pipe is communicated with the bag, and the adjusting pipe is used for injecting a medium into the bag so as to change the radial size of the bag; the test section is provided with a plurality of temperature measuring points at intervals along the length direction of the temperature sensing optical fiber, and the temperature sensing optical fiber can detect the temperature in the detection hole; the host is electrically connected with the temperature sensing optical fiber, and the host can receive detection data of the multiple temperature measuring points and calculate the height of the water flowing fractured zone according to the detection data. According to the technical scheme provided by the invention, the problems of complex structure and tedious detection operation of the height detection device for the water-flowing fractured zone in the prior art can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel water-conducting fracture zone detection, and in particular to a water-conducting fracture zone detection device and a detection method. Background Art

[0002] In the process of coal mining, roof maintenance is the key to maintaining stable operation of the tunnel. If the roof maintenance work is not in place, it will cause roof accidents. In severe cases, it will cause major accidents such as water seepage, spalling, and roof collapse, causing serious economic losses. Mining activities will break the original stress balance conditions of the roof, induce roof damage and deformation, cause cracks in the roof rock layer, and continue to expand to form a fracture zone. Due to the water filling in the fracture zone, leakage occurs between it and the tunnel roof, affecting the stability of the tunnel and the working face.

[0003] At present, before the mine roadway maintenance work is carried out, it is usually necessary to conduct roof maintenance condition detection and roadway roof stability detection to analyze the degree of influence of mining on the roadway roof, determine whether it is serious, and then formulate corresponding maintenance measures. The roof maintenance condition detection mainly detects the roof maintenance conditions such as the height of the fracture zone above the roadway roof, the water filling condition in the fracture zone, the water filling pressure in the fracture zone, and the strength of the roof rock layer. The roadway roof stability detection mainly detects the stability of the roadway roof rock layer to determine whether the roadway can continue to operate safely.

[0004] In the prior art, the height of the fracture zone above the tunnel roof can be measured by electrical testing and optical fiber monitoring. The optical fiber monitoring equipment is complex and the operation is very cumbersome. Electrical testing analyzes the damage of the overburden by measuring the electrical parameters such as the resistivity of the rock formation. This method can obtain the electrical distribution map of the rock formation, which helps to understand the overall damage of the rock formation, but it also has the problem of complex test structure and inconvenient operation. Summary of the invention

[0005] The present invention provides a water-conducting fracture zone detection device and a detection method, so as to solve the problems of complex structure and cumbersome detection operation of the water-conducting fracture zone height detection device in the prior art.

[0006] According to one aspect of the present invention, a water-conducting fracture zone detection device is provided, which is used to detect the depth of the water-conducting fracture zone above the tunnel roof, and the water-conducting fracture zone detection device comprises: a water pipe, which has a water inlet section and a water outlet section arranged in sequence, the water inlet section is connected to a water source, and the water outlet section is used to inject water into a detection hole in the rock formation; a bag, which is sleeved on the outer circumference of the water pipe and is located at one end of the water inlet section close to the water outlet section, and the radial size of the bag is changeable, so that the bag can fit with the inner wall of the detection hole to block the detection hole; an adjustment tube, which is connected to the bag, and the adjustment tube is used to inject a medium into the bag to change the radial size of the bag; a temperature-sensitive optical fiber, the temperature-sensitive optical fiber has a test section, and the test section is provided with a plurality of temperature measuring points at intervals along the length direction of the temperature-sensitive optical fiber, the test section and the water outlet section are both located on the same side of the bag, and the temperature-sensitive optical fiber can detect the temperature in the detection hole; a host, which is electrically connected to the temperature-sensitive optical fiber, and the host can receive detection data of the plurality of temperature measuring points and calculate the height of the water-conducting fracture zone according to the detection data.

[0007] Furthermore, a plurality of water outlet holes are arranged on the side wall of the water outlet section, and the plurality of water outlet holes are arranged at intervals along the extension direction of the water outlet section. The test section is arranged in the water outlet section, and the extension direction of the test section is the same as that of the water outlet section.

[0008] Furthermore, a perforation is provided on the water inlet section, the perforation is located on a side of the bag away from the water outlet section, the temperature sensing optical fiber is passed through the perforation, and the test section is passed through the perforation in the water outlet section.

[0009] Furthermore, the water-conducting fracture zone detection device also includes a guide wheel, which is arranged at the end of the water outlet section away from the water inlet section, and the guide wheel can guide the moving direction of the water pipe in the detection hole.

[0010] Furthermore, the water-conducting fracture zone detection device also includes a circulation pipeline, which is located outside the detection hole. A flow monitoring meter, a pressure monitoring meter and a bag control valve group are sequentially arranged on the circulation pipeline. One end of the circulation pipeline is connected to a water source, and the water inlet section and the regulating pipe are both connected to the circulation pipeline. The flow monitoring meter, the pressure monitoring meter, the water pipe and the bag control valve group are arranged in sequence, and the regulating pipe is connected to the bag control valve group. The bag control valve group can control the radial size of the bag according to the detection data of the flow monitoring meter and the pressure monitoring meter; the circulation pipeline also includes a first control valve, which is located between the pressure monitoring meter and the bag control valve group. The first control valve, the circulation pipeline and the bag control valve group are connected through a first three-way valve, and the first control valve is connected to the water inlet section.

[0011] Furthermore, the bag control valve group includes a second control valve and a pressure relief valve, the second control valve is connected to the circulation pipeline, the regulating pipe, the pressure relief valve and the second control valve are connected through a second three-way valve, and the second control valve is connected to the first three-way valve.

[0012] According to another aspect of the present invention, a detection method for a water-conducting fracture zone detection device is provided. The detection method is applied to the above-mentioned water-conducting fracture zone detection device, and the detection method comprises the following steps: step one, drilling a detection hole in the roof of the tunnel; step two, sending a water pipe, a bag and a temperature-sensitive optical fiber of the water-conducting fracture zone detection device into the detection hole; step three, injecting water into the bag to isolate the detection hole; step four, injecting water into the water pipe, and obtaining detection data through different temperature measuring points of the test section of the temperature-sensitive optical fiber; step five, confirming the height range of the water-conducting fracture zone according to the detection data.

[0013] Furthermore, step three specifically includes: injecting water into the bag for a preset time, observing the monitoring data of the flow monitoring meter and the pressure monitoring meter, controlling the amount of water injected into the bag according to the monitoring data, and when the monitoring data reaches a preset value, the bag isolates the detection hole.

[0014] Furthermore, the test section has a relatively set top and bottom, and step five specifically includes: obtaining detection data of the top, if the data of the top is within a preset range, the test section is within the water-conducting fracture zone, if the data of the top is not within the preset range, the test section is not within the water-conducting fracture zone.

[0015] Furthermore, if the change value of the data at the top is within a preset range, the test section is within the water-conducting fracture zone, and the detection method also includes: performing pressure relief treatment on the bag, pushing the water pipe, bag and temperature-sensitive optical fiber into the detection hole by a preset length, and repeating the above steps three to five until the detection data at the top changes; if the change value of the data at the top is not within the preset range, the test section is not within the water-conducting fracture zone, and the detection method also includes: performing pressure relief treatment on the bag, withdrawing the water pipe, bag and temperature-sensitive optical fiber from the detection hole by a preset length, and repeating the above steps three to five until the change value of the data at the top is within the preset range.

[0016] By applying the technical solution of the present invention, multiple temperature measuring points on the test section can detect the temperature in the detection hole. When water is injected into the detection hole through the water outlet section of the water pipe and the water contacts the temperature measuring points on the test section, the temperature of the water is different from the temperature of the air in the detection hole, which will cause the detection temperature of the temperature measuring point to change, so as to know the water level in the detection hole and the change of the water level, thus simplifying the detection operation and calculation difficulty of the height of the water-conducting fracture zone. The bag can ensure the sealing of the water level during the detection process, prevent the water in the detection hole from flowing out of the detection hole, so that the water in the detection hole can only be in the detection hole or enter the surrounding fractures, thereby improving the accuracy of the temperature measuring point detection. Through the above-mentioned arrangement, the structural composition of the water-conducting fracture zone detection device is simplified, which not only facilitates the disassembly and installation between components, but also improves the convenience of the water-conducting fracture zone height detection operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic diagram showing the water-conducting fracture zone detection device provided by the present invention in a detection hole is shown;

[0019] Figure 2 The schematic diagram of the structure of the water-conducting fracture zone detection device provided by the present invention is shown;

[0020] Figure 3 The figure shows an assembly diagram of the bag, water pipe and temperature-sensing optical fiber provided by the present invention.

[0021] The above drawings include the following reference numerals:

[0022] 10. Water pipes;

[0023] 11. Water inlet section;

[0024] 111. perforation; 112. sealing ring;

[0025] 12. Water outlet section;

[0026] 122, first joint; 123, second joint;

[0027] 20. Capsule;

[0028] 30. Regulating tube;

[0029] 40. Temperature sensing optical fiber;

[0030] 50. Host;

[0031] 60. Guide wheel;

[0032] 70. Circulation pipeline;

[0033] 71. Pump body;

[0034] 81. Flow monitoring meter; 82. Pressure monitoring meter;

[0035] 83. First control valve;

[0036] 84. Second control valve;

[0037] 85. Pressure relief valve;

[0038] 86. First three-way valve; 87. Second three-way valve;

[0039] 91. Cable ties;

[0040] 01. Detection hole;

[0041] 02. Water-conducting fracture zone;

[0042] 021. Fracture zone;

[0043] 022. Collapse zone;

[0044] 03. Curved sinking zone;

[0045] 04. No impact on rock formation. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all 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.

[0047] like Figures 1 to 3 As shown, an embodiment of the present invention provides a water-conducting fracture zone detection device, which is used to detect the depth of the water-conducting fracture zone above the tunnel roof, and the water-conducting fracture zone detection device includes: a water pipe 10, a bag 20, an adjustment tube 30, a temperature-sensitive optical fiber 40 and a host 50. Among them, the water pipe 10 has a water inlet section 11 and a water outlet section 12 arranged in sequence, the water inlet section 11 is connected to the water source, and the water outlet section 12 is used to inject water into the detection hole 01 in the rock formation. The bag 20 is sleeved on the outer periphery of the water pipe 10 and is located at one end of the water inlet section 11 close to the water outlet section 12. The radial size of the bag 20 is variable, so that the bag 20 can fit with the inner wall of the detection hole 01 to block the detection hole 01. The adjustment tube 30 is connected to the bag 20, and the adjustment tube 30 is used to inject a medium into the bag 20 to change the radial size of the bag 20. The temperature-sensing optical fiber 40 has a test section, and a plurality of temperature measuring points are arranged at intervals along the length direction of the temperature-sensing optical fiber 40. The test section and the water outlet section 12 are both located on the same side of the bag 20. The temperature-sensing optical fiber 40 can detect the temperature in the detection hole 01. The host 50 is electrically connected to the temperature-sensing optical fiber 40, and the host 50 can receive the detection data of the plurality of temperature measuring points and calculate the height of the water-conducting fracture zone according to the detection data.

[0048] The rock mass on the top plate is sequentially composed of the water-conducting fracture zone 02, the curved subsidence zone 03 and the unaffected rock layer 04. The water-conducting fracture zone 02 includes the collapse zone 022 and the fracture zone 021, which are sequentially distributed. There are many fractures distributed in the collapse zone 022 and the fracture zone 021, which can guide the water in the adjacent aquifer through the fractures, and finally destroy the structure of the water-conducting fracture zone 02 and cause collapse.

[0049] By applying the technical solution of the present invention, multiple temperature measuring points on the test section can detect the temperature in the detection hole 01. When water is injected into the detection hole 01 through the water outlet section 12 of the water pipe 10, when the water contacts the temperature measuring points on the test section, the temperature of the water is different from the temperature of the air in the detection hole 01, which will cause the detection temperature of the temperature measuring point to change, so as to know the water level in the detection hole 01 and the change of the water level, thus simplifying the detection operation and calculation difficulty of the height of the water-conducting fracture zone. The bag 20 can ensure the sealing of the water level during the detection process, prevent the water in the detection hole 01 from flowing out of the detection hole 01, so that the water in the detection hole 01 can only be in the detection hole 01 or enter the surrounding fractures, thereby improving the accuracy of the temperature measuring point detection. Through the above-mentioned setting, the structural composition of the water-conducting fracture zone detection device is simplified, which not only facilitates the disassembly and installation between components, but also improves the convenience of the water-conducting fracture zone height detection operation. At the same time, the temperature-sensing optical fiber 40 and other key components can be reused, reducing the detection cost and improving the economic benefit.

[0050] In the present application, the specific materials of the water inlet section 11 and the water outlet section 12 are not limited.

[0051] In this embodiment, the water inlet section 11 is a steel pipe, and the water outlet section 12 is a plastic pipe. The water outlet section 12 can be a plurality of plastic pipes connected by a first joint 122, and a second joint 123 is provided between the steel pipe and the plastic pipe for connection. In this way, the steel pipe has a certain structural strength and can provide support for the plastic pipe, so that the water pipe 10 can move conveniently in the detection hole 01. In addition, the diameter of the water inlet section 11 is larger than the diameter of the water outlet section 12, so that the water supply is large and the water supply is fast, and the flow rate of the water outlet section 12 is relatively uniform when the water is discharged, which further improves the accuracy of the detection.

[0052] Among them, the spacing between the temperature measuring points on the temperature-sensing optical fiber 40 is 0.5 meters, which makes it convenient to calculate the length of the temperature measuring points at different positions in the detection hole 01. By using the inclination angle of the detection hole, the height of the temperature measuring point is calculated according to the trigonometric function, and then the height of the water-conducting fracture zone is obtained.

[0053] In this embodiment, the inclination angle of the detection hole 01 is not limited, and a plurality of detection holes 01 with different inclination angles can be drilled to increase the measurement accuracy of the height of the water-conducting fracture zone.

[0054] Specifically, a plurality of water outlet holes are arranged on the side wall of the water outlet section 12, and the plurality of water outlet holes are arranged at intervals along the extension direction of the water outlet section 12. The test section is arranged in the water outlet section 12, and the extension direction of the test section and the water outlet section 12 are the same. Through the above arrangement, not only can the test section be protected by the water outlet section 12, but also the friction damage between the test section and the detection hole 01 can be avoided, and the service life of the test section can be extended. In addition, the above arrangement can make the water body evenly distributed around the test section, thereby improving the uniformity and reliability of temperature detection of the temperature-sensing optical fiber 40.

[0055] Preferably, a plurality of water outlet holes are evenly spaced and distributed on the periphery of the water outlet section 12 , so as to ensure the uniformity of water outlet from the water outlet section 12 and ensure that the water body can quickly and evenly enter the detection hole 01 .

[0056] like Figure 3 As shown, a perforation 111 is provided on the water inlet section 11, and the perforation 111 is located on the side of the bag 20 away from the water outlet section 12. The temperature sensing optical fiber 40 is inserted into the perforation 111, and the test section is inserted into the water outlet section 12 through the perforation 111. The above structure ensures the stability and safety of the temperature sensing optical fiber 40 in the detection hole 01, which not only improves the stability of the temperature sensing optical fiber 40 in the detection hole, but also reduces the risk of the temperature sensing optical fiber 40 being damaged in complex geological conditions, and ensures the continuity and integrity of the detection data.

[0057] Furthermore, a sealing ring 112 is provided at the contact point between the perforation 111 and the temperature-sensitive optical fiber 40 to prevent the water in the water outlet section 12 from leaking from the perforation 111 .

[0058] Specifically, the temperature-sensing optical fiber 40 located outside the water outlet section 12 is fixed to the outer wall of the water outlet section 12 by a plurality of fixing ties 91 to ensure that the temperature-sensing optical fiber 40 is straightened and firmly tied to avoid excessive bending of the temperature-sensing optical fiber 40 and resulting in inaccurate detection results.

[0059] Preferably, the temperature-sensing optical fiber 40 located outside the water outlet section 12 is covered with a sheath to prevent the temperature-sensing optical fiber 40 from being damaged.

[0060] like Figure 2 As shown, the water-conducting fracture zone detection device further includes a guide wheel 60, which is arranged at the end of the water outlet section 12 away from the water inlet section 11, and the guide wheel 60 can guide the moving direction of the water pipe 10 in the detection hole 01. The setting of the guide wheel 60 can guide and direct the movement of the water pipe 10, so that the movement of the water pipe 10 is more stable, the moving efficiency and positioning accuracy of the water pipe 10 in the detection hole 01 are improved, the operating flexibility and positioning accuracy of the detection device in the detection process are significantly improved, and the deviation and jamming of the water pipe 10 in the detection hole 01 can be effectively avoided, thereby improving the detection efficiency of the water-conducting fracture zone detection device.

[0061] In the present application, the water-conducting fracture zone detection device also includes a circulation pipeline 70, which is located outside the detection hole 01. A flow monitoring meter 81, a pressure monitoring meter 82 and a bag control valve group are sequentially arranged on the circulation pipeline 70. One end of the circulation pipeline 70 is connected to a water source, and the water inlet section 11 and the regulating pipe 30 are both connected to the circulation pipeline 70. The flow monitoring meter 81, the pressure monitoring meter 82, the water pipe 10 and the bag control valve group are arranged in sequence. The regulating pipe 30 is connected to the bag control valve group. The bag control valve group can control the radial size of the bag 20 according to the detection data of the flow monitoring meter 81 and the pressure monitoring meter 82.

[0062] Through the above settings, the expansion degree of the bag can be adjusted in real time through the detection data of the flow monitoring meter 81 and the pressure monitoring meter 82 to ensure that it fits tightly with the hole wall of the detection hole 01, thereby ensuring the blocking effect of the bag 20 on the detection hole 01. Even in the case of changes in the hole diameter or unstable geological conditions, the bag 20 can maintain a good fit with the hole wall of the detection hole 01, thereby improving the adaptability and safety of the detection device.

[0063] The water-conducting fracture zone detection device further includes a pump body 71 , which is connected to the circulation pipeline 70 , and the pump body 71 is used to pump water from a water source into the circulation pipeline 70 .

[0064] like Figure 2 As shown, the circulation pipeline 70 also includes a first control valve 83, which is located between the pressure monitoring gauge 82 and the bag control valve group. The first control valve 83, the circulation pipeline 70 and the bag control valve group are connected through a first three-way valve 86, and the first control valve 83 is connected to the water inlet section 11.

[0065] Specifically, the bag control valve group includes a second control valve 84 and a pressure relief valve 85, the second control valve 84 is connected to the circulation pipeline 70, the regulating pipe 30, the pressure relief valve 85 and the second control valve 84 are connected through the second three-way valve 87, and the second control valve 84 is connected to the first three-way valve 86. Through the above arrangement, the state of the bag 20 is accurately controlled, not only can the bag 20 be quickly expanded to close the detection hole 01, but also the state of the bag 20 can be flexibly adjusted during the detection process, thereby improving the adaptability and operation efficiency of the device.

[0066] According to another embodiment of the present application, a detection method for a water-conducting fracture zone detection device is provided. The detection method is applied to the water-conducting fracture zone detection device provided in the above embodiment. The detection method includes the following steps:

[0067] Step 1: Drill a detection hole 01 in the top plate of the tunnel;

[0068] Step 2: Place the water pipe 10, the bag 20 and the temperature-sensitive optical fiber 40 of the water-conducting fracture zone detection device into the detection hole 01;

[0069] Step 3, inject water into the bag 20 to block the detection hole 01;

[0070] Step 4: inject water into the water pipe 10, and obtain detection data through different temperature measurement points of the test section of the temperature sensing optical fiber 40;

[0071] Step five: confirm the height range of the water-conducting fracture zone based on the test data.

[0072] The detection method of the water-conducting fracture zone detection device provided by the present invention simplifies the detection operation of the height of the water-conducting fracture zone through the cooperation of the bag 20 and the temperature-sensitive optical fiber 40, improves the accuracy of the temperature measurement point detection, improves the efficiency of the detection, further reduces the cost, and speeds up the detection process, providing a strong guarantee for the smooth progress of coal mining. At the same time. It can significantly shorten the time for water-conducting fracture zone detection. In coal mining, this method can quickly determine the location and range of the water-conducting fracture zone, and can more accurately reflect the development of rock strata fissures, providing a scientific basis for roof management and prevention and control of water disasters, thereby improving the safety production level of coal mines.

[0073] There is no limitation on the length of the detection hole 01 , as long as it can reach the water-conducting fracture zone.

[0074] In this embodiment, the height of the water-conducting fracture zone 02 can be theoretically calculated according to the "Design Code for Water Prevention and Control in Coal Mines (GB51070-2014)", and 16m or 0.2 times the height of the water-conducting fracture zone 02 can be added as a safety distance. In this way, the height of the bottom of the detection hole 01 can be ensured to be higher than the height of the water-conducting fracture zone 02, thereby improving the detection efficiency.

[0075] Step 2 specifically includes: pushing the water-conducting fracture zone detection device to the theoretical calculated height of the water-conducting fracture zone 02 , so as to facilitate the advancement or withdrawal of the water-conducting fracture zone detection device in the detection hole 01 .

[0076] Step three specifically includes: injecting water into the bag 20 for a preset time, observing the monitoring data of the flow monitoring meter 81 and the pressure monitoring meter 82, and controlling the amount of water injected into the bag 20 according to the monitoring data. When the monitoring data reaches the preset value, the bag 20 isolates the detection hole 01, and the second control valve 84 is closed at this time.

[0077] In this way, by monitoring the flow rate and pressure changes, the expansion degree of the bladder 20 can be accurately controlled, the tightness of the closure of the detection hole can be ensured, and the detection hole can be effectively closed, thereby improving the accuracy of the detection.

[0078] In this embodiment, the preset value of the flow monitoring meter 81 is 0 m / s, and the preset value of the pressure monitoring meter 82 is 5 MPa, which indicates that the bladder 20 has been fully inflated.

[0079] In other embodiments, adjustments can be made according to actual working conditions.

[0080] The test section has a top and a bottom that are relatively set, and step five specifically includes: obtaining the detection data of the top, if the data of the top is within a preset range, the test section is within the water-conducting fracture zone, if the data of the top is not within the preset range, the test section is not within the water-conducting fracture zone. This judgment method is simple and effective, can quickly determine the location of the fracture zone, and improves the efficiency of geological exploration. At the same time, this method is simple and easy to implement, does not require complex calculations and analysis, and reduces the difficulty of operation.

[0081] In this embodiment, the top end is the connection between the water outlet section 12 and the guide wheel 60 , and the bottom end is the connection between the water outlet section 12 and the water inlet section 11 .

[0082] Preferably, the water supply pressure, water supply flow rate and water injection time can be recorded during the water injection process, and the changes in the detection data on the host 50 can be observed for comparison during subsequent repeated detections, which can further increase the accuracy of the detection.

[0083] If the change value of the data at the top is within a preset range, the test section is within the water-conducting fracture zone, and the detection method also includes: relieving the pressure of the bag 20, pushing the water pipe 10, the bag 20 and the temperature-sensitive optical fiber 40 into the detection hole 01 by a preset length, and repeating steps three to five above until the detection data at the top changes.

[0084] If the change value of the data at the top is not within the preset range, the test section is not within the water-conducting fracture zone, and the detection method also includes: performing pressure relief treatment on the bag 20, withdrawing the water pipe 10, the bag 20 and the temperature-sensitive optical fiber 40 from the detection hole 01 by a preset length, and repeating the above steps three to five until the change value of the data at the top is within the preset range.

[0085] In this embodiment, the preset range of the data change value is not specifically limited and can be selected according to actual working conditions. The preset length is calculated using the dichotomy method, which can not only accurately determine the boundary of the water-conducting fracture zone, but also significantly improve the detection efficiency.

[0086] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. 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 "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0087] 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 understood 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.

[0088] 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 devices or elements 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.

[0089] 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 other 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.

[0090] 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.

[0091] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A water-conducting fracture zone detection device, the water-conducting fracture zone detection device is used to detect the depth of the water-conducting fracture zone (02) above the tunnel roof, characterized in that: The water-conducting fracture zone detection device comprises: A water pipe (10) having a water inlet section (11) and a water outlet section (12) arranged in sequence, wherein the water inlet section (11) is connected to a water source, and the water outlet section (12) is used to inject water into a detection hole (01) in a rock formation; a bag (20) which is sleeved on the outer circumference of the water pipe (10) and is located at one end of the water inlet section (11) close to the water outlet section (12); the radial dimension of the bag (20) is variable, so that the bag (20) can fit with the inner wall of the detection hole (01) to block the detection hole (01); an adjusting tube (30), which is in communication with the sac (20), and is used to inject a medium into the sac (20) so as to change the radial dimension of the sac (20); a temperature-sensitive optical fiber (40), the temperature-sensitive optical fiber (40) having a test section, the test section being provided with a plurality of temperature measurement points at intervals along the length direction of the temperature-sensitive optical fiber (40), the test section and the water outlet section (12) being both located on the same side of the bag (20), and the temperature-sensitive optical fiber (40) being capable of detecting the temperature in the detection hole (01); A host (50) is electrically connected to the temperature-sensitive optical fiber (40), and the host (50) is capable of receiving detection data of a plurality of temperature measurement points and calculating the height of the water-conducting fracture zone (02) based on the detection data.

2. The water-conducting fracture zone detection device according to claim 1, characterized in that: A plurality of water outlet holes are arranged on the side wall of the water outlet section (12), and the plurality of water outlet holes are arranged at intervals along the extension direction of the water outlet section (12). The test section is arranged in the water outlet section (12), and the extension direction of the test section and the water outlet section (12) is the same.

3. The water-conducting fracture zone detection device according to claim 2, characterized in that: The water inlet section (11) is provided with a perforation (111), the perforation (111) is located on a side of the bag (20) away from the water outlet section (12), the temperature sensing optical fiber (40) is inserted into the perforation (111), and the test section is inserted into the water outlet section (12) through the perforation (111).

4. The water-conducting fracture zone detection device according to claim 3, characterized in that: The water-conducting fracture zone detection device further comprises a guide wheel (60), wherein the guide wheel (60) is arranged at an end of the water outlet section (12) away from the water inlet section (11), and the guide wheel (60) is capable of guiding the moving direction of the water pipe (10) in the detection hole (01).

5. The water-conducting fracture zone detection device according to claim 4, characterized in that: The water-conducting fracture zone detection device further comprises a circulation pipeline (70), the circulation pipeline (70) being located outside the detection hole (01), the circulation pipeline (70) being provided with a flow monitoring meter (81), a pressure monitoring meter (82) and a bag control valve group in sequence, one end of the circulation pipeline (70) being connected to a water source, the water inlet section (11) and the regulating pipe (30) being both connected to the circulation pipeline (70), the flow monitoring meter (81), the pressure monitoring meter (82), the water pipe (10) and the bag control valve group being provided in sequence, the regulating pipe (30) being connected to the bag control valve group, and the bag control valve group being capable of controlling the radial dimension of the bag (20) according to the detection data of the flow monitoring meter (81) and the pressure monitoring meter (82); The circulation pipeline (70) further comprises a first control valve (83), wherein the first control valve (83) is located between the pressure monitoring gauge (82) and the bag control valve group, wherein the first control valve (83), the circulation pipeline (70) and the bag control valve group are connected via a first three-way valve (86), and the first control valve (83) is connected to the water inlet section (11).

6. The water-conducting fracture zone detection device according to claim 5, characterized in that: The bag control valve group includes a second control valve (84) and a pressure relief valve (85), the second control valve (84) is connected to the circulation pipeline (70), the regulating tube (30), the pressure relief valve (85) and the second control valve (84) are connected via a second three-way valve (87), and the second control valve (84) is connected to the first three-way valve (86).

7. A detection method for a water-conducting fracture zone detection device, characterized in that: The detection method is applied to the water-conducting fracture zone detection device according to any one of claims 1 to 6, and the detection method comprises the following steps: Step 1: Drill a detection hole (01) in the roof of the tunnel; Step 2: inserting the water pipe (10), the bag (20) and the temperature-sensitive optical fiber (40) of the water-conducting fracture zone detection device into the detection hole (01); Step three, injecting water into the bag (20) to block the detection hole (01); Step 4, injecting water into the water pipe (10), and acquiring detection data through different temperature measurement points of the test section of the temperature-sensitive optical fiber (40); Step five: confirming the height range of the water-conducting fracture zone (02) based on the detection data.

8. The detection method according to claim 7, characterized in that: The water-conducting fracture zone detection device is the water-conducting fracture zone detection device according to claim 5, and the step three specifically comprises: Water is injected into the bag (20) for a preset time, and monitoring data of a flow monitoring meter (81) and a pressure monitoring meter (82) are observed. The amount of water injected into the bag (20) is controlled according to the monitoring data. When the monitoring data reaches a preset value, the bag (20) blocks the detection hole (01).

9. The detection method according to claim 7, characterized in that: The test section has a top end and a bottom end that are relatively arranged, and the step five specifically includes: The detection data of the top is obtained. If the data of the top is within a preset range, the test section is within the water-conducting fracture zone (02). If the data of the top is not within the preset range, the test section is not within the water-conducting fracture zone (02).

10. The detection method according to claim 9, characterized in that: If the change value of the data at the top is within the preset range, the test section is within the water-conducting fracture zone (02), and the detection method further comprises: The bag (20) is subjected to pressure relief treatment, the water pipe (10), the bag (20) and the temperature-sensitive optical fiber (40) are pushed into the detection hole (01) by a preset length, and the above steps 3 to 5 are repeated until the detection data at the top end changes; If the change value of the data at the top is not within the preset range, the test section is not within the water-conducting fracture zone (02), and the detection method further comprises: performing pressure relief treatment on the bag (20), withdrawing the water pipe (10), the bag (20) and the temperature-sensitive optical fiber (40) from the detection hole (01) by a preset length, and repeating the above steps three to five until the change value of the data at the top is within the preset range.

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