Device and method for detecting hydraulic connection of rock strata based on rope coring drill

Abstract

The present invention provides a detection device and method for hydraulic connection of rock strata based on a rope coring drill, which relates to the technical field of rock strata survey, and includes: a connection mechanism for connecting an external drill pipe; a first water stop plug, a measuring pipe, a second water stop plug and a water injection pipe connected in sequence, and when the first water stop plug and the second water stop plug are pressurized, a detection chamber and a pressure chamber are formed in the borehole; a first sensor for detecting the pressure in the detection chamber; a second sensor for detecting the pressure in the pressure chamber; a processor for receiving the detection signals of the first sensor and the second sensor, and calculating the hydraulic connection value. The invention solves the technical problem that the conventional water pressure test method in the prior art cannot realize the measurement of the hydraulic connection in the vertical direction between different rock strata, realizes the evaluation of the permeability between the upper and lower rock masses, and can provide a data basis for accurately calculating the water pressure outside the tunnel.

Description

Technical Field

[0001] The invention relates to the technical field of rock stratum survey, and in particular to a detection device and method for hydraulic connection of rock strata based on a rope coring drill. Background Art

[0002] In the geological survey of water conservancy and hydropower, water pressure test is an important part of the work to evaluate the hydrogeological characteristics of rock mass. Usually, an embolism is used to isolate the borehole into a closed test space, and the test section is pressurized with water. The flow rate and pressure are measured to calculate the permeability or permeability coefficient of the rock mass, and the permeability of the rock mass is evaluated based on this.

[0003] With the advancement of drilling rig technology and techniques, rope coring drills are increasingly used in water conservancy and hydropower surveys, and the water pressure test devices that match them have also been improved. The existing patent CN21619780U discloses a slide rod lifting mechanical expansion plug suitable for rope coring drills, which greatly improves the practicability of water pressure tests on rope coring drills. The existing patent CN2018934399U discloses an expansion water-stop plug kit and a rope coring non-drilling water pressure test device, which further optimizes the structure of the water pressure test device and simplifies the test operation method.

[0004] Although the existing borehole water pressure test equipment and processes have been greatly improved, the current water pressure test method can only evaluate the permeability of the isolation section in the horizontal direction, but cannot evaluate the permeability characteristics in the vertical direction, especially between the upper and lower rock layers. After the excavation of underground caverns such as tunnels, groundwater seeps from top to bottom toward the tunnel. Therefore, the permeability characteristics of the rock layer in the vertical direction are crucial for evaluating the external water pressure characteristics of the lining after the excavation of the underground cavern and the problem of sudden water inrush. However, the conventional water pressure test based on the rope coring rig cannot achieve the evaluation of the vertical permeability performance. Summary of the invention

[0005] The object of the present invention is to provide a detection device and method for hydraulic connection of rock strata based on a rope coring drill, so as to realize the measurement of hydraulic connection in the vertical direction between upper and lower rock strata based on the rope coring drill.

[0006] The present invention provides a rock stratum hydraulic connection detection device based on a rope coring drill, comprising:

[0007] Rope coring tools, connection mechanisms and water pressure testing devices;

[0008] The rope coring drill tool comprises a driving drill pipe and an outer drill pipe, wherein the outer drill pipe is connected to the driving drill pipe;

[0009] The connecting mechanism is provided with a water inlet hole connected to the outer drill pipe, one end of the connecting mechanism is fixedly arranged in the outer drill pipe, and the other end extends to the outside of the outer drill pipe, and the position between the connecting mechanism and the outer drill pipe below the water inlet hole is blocked;

[0010] The water pressure detection device comprises a first water stop plug, a measuring tube, a second water stop plug and a water injection pipe which are connected in sequence, as well as a first sensor, a second sensor and a processor. The end of the first water stop plug which is away from the measuring tube is connected to the connecting mechanism. When the first water stop plug, the measuring tube, the second water stop plug and the water injection pipe are located in a borehole and the first water stop plug and the second water stop plug are pressurized, the inner wall of the borehole, the first water stop plug, the measuring tube and the second water stop plug form a detection cavity, and the inner wall of the borehole, the second water stop plug and the water injection pipe form a pressure cavity; the first sensor is arranged on the outer side of the measuring tube, and is used to detect the pressure in the detection cavity; the second sensor is arranged on the outer side of the water injection pipe, and is used to detect the pressure in the pressure cavity;

[0011] A plurality of connecting pipes, wherein the outer drill pipe and the driving drill pipe, the first water stop plug and the measuring pipe, and the second water stop plug and the water injection pipe are connected respectively by a connecting pipe, and the connecting pipe is provided with a through hole for a signal line of the first sensor or the second sensor to pass through;

[0012] A processor is communicatively connected to the first sensor and the second sensor, respectively, for receiving detection signals from the first sensor and the second sensor, and calculating a hydraulic connection value based on the detection signals from the first sensor and the second sensor, wherein the hydraulic connection value is a ratio of an increase in pressure in the detection chamber to an increase in pressure in the pressure chamber during a target time period.

[0013] In an optional embodiment, the first water-stop plug includes a first movable tube and a first water-stop component sleeved on the outside of the first movable tube, one end of the first movable tube is connected to the connecting mechanism, and the other end is connected to the measuring tube, the first movable tube and the first water-stop component are slidably sealed in contact, and a first water-stop cavity is formed between the outer wall of the first movable tube and the inner wall of the first water-stop component; the second water-stop plug includes a second movable tube and a second water-stop component sleeved on the outside of the second movable tube, one end of the second movable tube is connected to the connecting mechanism, and the other end is connected to the measuring tube, the second movable tube and the second water-stop component are slidably sealed in contact, a second water-stop cavity is formed between the outer wall of the second movable tube and the inner wall of the second water-stop component, the second water-stop cavity is connected to the first water-stop cavity by a pipeline, and the second movable tube is provided with a water outlet; wherein, when the second movable tube and the second water-stop component slide relative to each other until the water outlet hole is located inside the second water-stop component, the second movable tube is connected to the second water-stop cavity, and when the second movable tube and the second water-stop component slide relative to each other until the water outlet hole is located outside the second water-stop component, the second movable tube is connected to the pressure cavity.

[0014] In an optional embodiment, the first water-stopping assembly includes: a first water-stopping sleeve, which is sleeved on the outer side of the first movable tube, and a first water-stopping cavity is formed between the inner wall of the first water-stopping sleeve and the outer wall of the first movable tube; a first retaining sleeve, two first retaining sleeves are provided, and the two first retaining sleeves are respectively disposed at two ends of the first water-stopping sleeve, and the first retaining sleeve can be slidably sleeved on the outer side of the first movable tube, and the first retaining sleeve is sleeved on the outer side of one end of the first water-stopping sleeve and is fixedly connected to the first water-stopping sleeve; a first connecting pipe, which is fixedly connected to the first retaining sleeve, and the first connecting pipe is connected to the first water-stopping cavity; The second water-stopping assembly includes: a second water-stopping sleeve, which is sleeved on the outside of the second movable tube, and a second water-stopping cavity is formed between the inner wall of the second water-stopping sleeve and the outer wall of the second movable tube; a second retaining sleeve, two second retaining sleeves are provided, and the two second retaining sleeves are disposed at both ends of the second water-stopping sleeve, the second retaining sleeve can be slidably sleeved on the outside of the second movable tube, the second retaining sleeve is sleeved on the outside of one end of the second water-stopping sleeve, and is fixedly connected to the second water-stopping sleeve; a second connecting pipe, which is fixedly connected to the second retaining sleeve, the second connecting pipe is connected to the second water-stopping cavity, and is connected to the first connecting pipe.

[0015] In an optional embodiment, the connecting mechanism includes: a spear scoop, the spear scoop is provided with a spring-cage mechanism, the spring-cage mechanism is engaged with the outer drill pipe, and the spear scoop has a water inlet hole; an extension tube group, including a center tube, an inner tube and a water stop ring, the center tube and the inner tube are located on the inner side of the outer drill pipe, one end of the center tube is connected to the spear scoop, and the other end is connected to the inner tube, one end of the inner tube away from the center tube extends to the outside of the outer drill pipe and is connected to the first water stop plug, the water stop ring is arranged between the center tube and the outer drill pipe, and the position between the connecting mechanism and the outer drill pipe below the water inlet hole is sealed by the water stop ring.

[0016] In an optional embodiment, the extension tube set further includes: a fixing ring, located between the inner tube and the outer drill tube, and fixedly connected to the inner tube and the outer drill tube respectively.

[0017] In an optional embodiment, one end of the connecting pipe is provided with an internal thread, and the other end of the connecting pipe is provided with an external thread. The connecting pipe is threadably connected to the driving drill pipe, the external drill pipe, the first water stop plug, the measuring tube, the second water stop plug or the water injection pipe through the internal thread or the external thread; the connecting pipe is provided with a through hole for the signal line of the first sensor or the second sensor to pass through.

[0018] In an optional embodiment, it also includes: a pressure device, which is connected to the outer drill pipe and is used to supply pressure to the first water-stopping plug, the second water-stopping plug and the pressure chamber.

[0019] The present invention also provides a method for detecting hydraulic connection of rock strata based on a rope coring drill, using the above-mentioned device for detecting hydraulic connection of rock strata based on a rope coring drill, and the detection method comprises:

[0020] S1, applying pressure to the first water-stopping plug and the second water-stopping plug, so that the inner wall of the borehole, the first water-stopping plug, the measuring tube and the second water-stopping plug form a detection cavity, and the inner wall of the borehole, the second water-stopping plug and the water injection pipe form a pressure cavity;

[0021] S2, pressurizing the pressure chamber through the outer drill pipe;

[0022] S3, detecting the pressure in the detection chamber by the first sensor, and detecting the pressure in the pressure chamber by the second sensor;

[0023] S4. The processor receives the detection signals of the first sensor and the second sensor, and calculates a hydraulic connection value based on the detection signals of the first sensor and the second sensor, wherein the hydraulic connection value is a ratio of an increment of the pressure in the detection chamber to an increment of the pressure in the pressure chamber within a target time period, and a calculation formula for the hydraulic connection value is:

[0024]

[0025] Among them, H is the hydraulic connection value, P b-1 is the pressure of the pressurized chamber during the first period of time, P b-3 is the pressure of the pressurized chamber during the third time period, P m-1 is the pressure of the measuring chamber during the first period of time, P m-3 measuring the pressure of the cavity during a third time period;

[0026] S5, stop pressurizing the pressure chamber, and stop pressurizing the first water-stopping plug and the second water-stopping plug;

[0027] S6, moving the rock stratum hydraulic connection detection device to the next target position;

[0028] S7. Repeat steps S1 to S4 until all target positions are measured.

[0029] In an optional embodiment, when the first water-stopping plug includes a first movable tube and a first water-stopping assembly sleeved on the outside of the first movable tube, and the second water-stopping plug includes a second movable tube and a second water-stopping assembly sleeved on the outside of the second movable tube, and the second movable tube is provided with a water outlet, pressurizing the first water-stopping plug and the second water-stopping plug includes:

[0030] The water outlet is located inside the second water-stop assembly, the second movable pipe is connected to the second water-stop cavity, and the test water is injected by driving the drill pipe to pressurize the first water-stop plug and the second water-stop plug;

[0031] Pressurizing the pressure chamber by driving the drill pipe comprises:

[0032] The second movable tube is driven by the driving drill pipe to slide until the water outlet is located outside the second water-stopping assembly, so that the second movable tube is connected to the pressure chamber, and test water is injected by the driving drill pipe to pressurize the pressure chamber.

[0033] In an optional embodiment, after the processor receives the detection signals of the first sensor and the second sensor and calculates the hydraulic connection value based on the detection signals of the first sensor and the second sensor, the method further includes:

[0034] S41. Setting a hydraulic connection grade classification rule, and determining the hydraulic connection grade based on the grade classification rule and the calculated hydraulic connection value.

[0035] The detection device for hydraulic connection of strata based on a rope coring drill provided by the present invention can be connected to the outer drill pipe in the rope coring drill through a connecting mechanism, and can monitor the hydraulic connection between rock layers in a vertical direction accurately and in real time, thereby providing accurate data for geological exploration; when the first water-stop plug and the second water-stop plug are pressurized, a mutually isolated detection chamber and a pressure chamber are formed, at this time, the pressure chamber is pressurized through the outer drill pipe, and the pressure in the detection chamber is measured by the first sensor, and the pressure in the pressure chamber is measured by the second sensor, the processor receives the detection signals of the first sensor and the second sensor, and calculates the hydraulic connection value based on the detection signals of the first sensor and the second sensor, which solves the technical problem that the conventional water pressure test method in the prior art cannot realize the measurement of the hydraulic connection in the vertical direction between different rock layers, realizes the evaluation of the permeability between the upper and lower rock masses, and can provide a data basis for accurately calculating the water pressure outside the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 A schematic diagram of the overall structure of a detection device for hydraulic connection of rock strata based on a rope coring drill provided in an embodiment of the present invention;

[0038] Figure 2 A diagram showing the coordination structure of a detection device for hydraulic connection of rock strata based on a rope coring drill provided by an embodiment of the present invention and an outer drill pipe;

[0039] Figure 3 It is a schematic diagram of the matching structure of the outer drill pipe and the driving drill pipe in an embodiment of the present invention;

[0040] Figure 4 A diagram showing a use scenario of a device for detecting hydraulic connection of rock strata based on a rope coring drill provided in an embodiment of the present invention;

[0041] Figure 5 A schematic diagram of the structure of a connecting pipe in a detection device for hydraulic connection of rock strata based on a rope coring drill provided by an embodiment of the present invention;

[0042] Figure 6 A schematic structural diagram of a first water stop plug in a detection device for hydraulic connection of rock strata based on a rope coring drill provided by an embodiment of the present invention;

[0043] Figure 7 A schematic diagram of the structure of a second water stop plug in a detection device for hydraulic connection of rock strata based on a rope coring drill provided by an embodiment of the present invention;

[0044] Figure 8 A schematic flow chart of a method for detecting hydraulic connection of rock strata based on a rope coring drill provided in an embodiment of the present invention;

[0045] Fig. 9 A pressure curve diagram of a method for detecting hydraulic connection of rock strata based on a rope coring drill provided in an embodiment of the present invention.

[0046] Icons: 100-external drill pipe; 110-ejection chamber; 120-ejection stopper; 130-seat ring; 140-drill bit; 200-connecting pipe; 210-internal thread; 220-external thread; 230-perforation; 300-first water-stop plug; 310-first movable pipe; 320-first water-stop sleeve; 330-first retaining sleeve; 340-first connecting pipe; 400-measuring tube; 410-first sensor; 420-first signal line; 430-detection chamber; 500-second water-stop Embolism; 510-second movable tube; 511-water outlet; 520-second water-stop sleeve; 530-second retaining sleeve; 540-second connecting pipe; 600-water injection pipe; 610-second sensor; 620-second signal line; 630-pressure chamber; 700-drilling hole; 800-connecting mechanism; 810-spear scooper; 811-ejection mechanism; 812-water inlet; 820-center tube; 830-inner tube; 840-water-stop ring; 850-fixing ring; 900-driving drill pipe. DETAILED DESCRIPTION

[0047] 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 part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0048] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0049] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0050] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0051] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0052] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] The present embodiment provides a detection device for the hydraulic connection of rock strata based on a rope coring drill, which can be applied to the rope coring drill. Figure 2 and Figure 3 The rope coring drill tool includes a driving drill pipe 900 and an outer drill pipe 100. The driving drill pipe 900 is connected to the outer drill pipe 100. The driving drill pipe 900 can drive the outer drill pipe 100 to rise or fall or rotate, and can also provide high-pressure water into the outer drill pipe 100. The detection device for hydraulic connection of rock strata based on the rope coring drill tool of this embodiment is installed on the outer drill pipe 100, and the hydraulic connection that may exist between different rock strata in the vertical direction (usually between the upper and lower rock bodies) can be measured in the borehole 700.

[0054] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0055] Combination Figures 1 to 4The present embodiment provides a detection device for hydraulic connection of rock strata based on a rope coring drill, including a connecting mechanism 800, one end of which is fixedly arranged in an outer drill pipe 100, and has a water inlet hole 812 connected to the outer drill pipe 100, and the other end extends to the outside of the outer drill pipe 100, and the position between the connecting mechanism 800 and the outer drill pipe 100 below the water inlet hole 812 is blocked.

[0056] The connection mechanism 800 can be connected to the outer drill pipe 100, so that the water in the outer drill pipe 100 enters the connection mechanism 800 through the water inlet hole 812. Optionally, the number of the water inlet holes 812 in the connection mechanism 800 is multiple, and the multiple water inlet holes 812 are arranged along the circumference of the connection mechanism 800. The position between the connection mechanism 800 and the outer drill pipe 100 below the water inlet hole 812 is blocked to prevent the water in the outer drill pipe 100 from flowing out from the outside of the connection mechanism 800.

[0057] The first water-stop plug 300, the measuring tube 400, the second water-stop plug 500 and the water injection pipe 600 are connected in sequence, and the end of the first water-stop plug 300 away from the measuring tube 400 is used for the external drill pipe 100. When the first water-stop plug 300, the measuring tube 400, the second water-stop plug 500 and the water injection pipe 600 are located in the borehole 700 and the first water-stop plug 300 and the second water-stop plug 500 are pressurized, the inner wall of the borehole 700, the first water-stop plug 300, the measuring tube 400 and the second water-stop plug 500 form a detection chamber 430, and the inner wall of the borehole 700, the second water-stop plug 500 and the water injection pipe 600 form a pressure chamber 630.

[0058] It should be noted that when the first water-stop plug 300 and the second water-stop plug 500 are not pressurized, the first water-stop plug 300 and the second water-stop plug 500 are not in contact with the inner wall of the borehole 700, or the first water-stop plug 300 and the second water-stop plug 500 are in contact with the inner wall of the borehole 700 but do not achieve a plugging effect in the borehole 700. At this time, the outer drill pipe 100 can be used to drive the rock stratification hydraulic communication detection device based on the rope coring drill to rise and fall to adjust the position. When the first water-stop plug 300 and the second water-stop plug 500 are pressurized, the first water-stop plug 300 and the second water-stop plug 500 expand, and the first water-stop plug 300 and the second water-stop plug 500 fit with the inner wall of the borehole 700 to form a blockage. At this time, the inner wall of the borehole 700, the first water-stop plug 300, the measuring tube 400 and the second water-stop plug 500 form a detection cavity 430, and the inner wall of the borehole 700, the second water-stop plug 500 and the water injection pipe 600 form a pressure cavity 630. The pressure chamber 630 is connected to the outer drill pipe 100 through the first water-stop plug 300, the measuring tube 400, the second water-stop plug 500 and the water injection pipe 600, and the pressure chamber 630 can be pressurized through the drill pipe; the detection chamber 430 is a closed chamber, and the water in the pressure chamber 630 cannot enter the detection chamber 430 through the components in the rock stratification hydraulic communication detection device based on the rope coring drill.

[0059] The present embodiment provides a detection device for hydraulic connection of rock strata based on a rope coring drill, and further includes a first sensor 410, a second sensor 610 and a processor. The first sensor 410 is arranged on the outside of the measuring tube 400, and is used to detect the pressure in the detection chamber 430; the second sensor 610 is arranged on the outside of the water injection tube 600, and is used to detect the pressure in the pressure chamber 630; the processor is respectively connected to the first sensor 410 and the second sensor 610 in communication, and is used to receive the detection signals of the first sensor 410 and the second sensor 610, and calculate the hydraulic connection value based on the detection signals of the first sensor 410 and the second sensor 610, wherein the hydraulic connection value is the ratio of the increment of the pressure in the detection chamber 430 to the increment of the pressure in the pressure chamber 630 in the target time period.

[0060] In this embodiment, when there is permeation between rock formations, water in the pressure chamber 630 can enter the detection chamber 430 through the rock formation, and the pressure increment ratio of the pressure chamber 630 and the detection chamber 430 changes. By measuring the change in the pressure increment ratio of the pressure chamber 630 and the detection chamber 430, the permeability between the upper and lower rock masses can be evaluated. The method provided by the present invention can provide a data basis for accurately calculating the water pressure outside the tunnel.

[0061] Combination Figure 6 and Figure 7In some embodiments, the first water-stop plug 300 includes a first movable tube 310 and a first water-stop assembly sleeved on the outside of the first movable tube 310, one end of the first movable tube 310 is connected to the connecting mechanism 800, and the other end is connected to the measuring tube, the first movable tube 310 and the first water-stop assembly are slidably sealed in contact, and a first water-stop cavity is formed between the outer wall of the first movable tube 310 and the inner wall of the first water-stop assembly; the second water-stop plug 500 includes a second movable tube 510 and a second water-stop assembly sleeved on the outside of the second movable tube 510, one end of the second movable tube 510 is connected to the connecting mechanism 800, and the other end is connected to the measuring tube The second movable tube 510 is in slidable sealed contact with the second water-stop component, a second water-stop cavity is formed between the outer wall of the second movable tube 510 and the inner wall of the second water-stop component, the second water-stop cavity is connected with the first water-stop cavity by a pipeline, and the second movable tube 510 is provided with a water outlet hole 511; wherein, when the second movable tube 510 and the second water-stop component slide relative to each other until the water outlet hole 511 is located inside the second water-stop component, the second movable tube 510 is connected with the second water-stop cavity, and when the second movable tube 510 and the second water-stop component slide relative to each other until the water outlet hole 511 is located outside the second water-stop component, the second movable tube 510 is connected with the pressure cavity 630.

[0062] In this embodiment, when the outer drill pipe 100 drives the connecting mechanism 800 to move, the connecting mechanism 800 can drive the first movable tube 310 and the second movable tube 510 to move, so as to switch between the state of adjusting the pressure of the first water stop plug 300 and the second water stop plug 500 and the state of adjusting the pressure of the pressure chamber 630. Specifically, when the outer drill pipe 100 drives the connecting mechanism 800 to move, and then drives the first movable tube 310 and the second movable tube 510 to move through the connecting mechanism 800, so that the second movable tube 510 and the second water stop assembly slide relative to each other until the water outlet hole 511 is located inside the second water stop assembly, the second movable tube 510 is connected to the second water stop chamber, and the outer drill pipe 100 in High-pressure water can enter the second water-stopping cavity through the water outlet hole 511 to pressurize the second water-stopping plug 500. At the same time, the water in the second water-stopping cavity can flow into the first water-stopping cavity through the pipeline to pressurize the first water-stopping plug 300. When the outer drill pipe 100 drives the connection mechanism 800 to move, and then drives the first movable pipe 310 and the second movable pipe 510 to move through the connection mechanism 800, the second movable pipe 510 and the second water-stopping assembly slide relative to each other until the water outlet hole 511 is located outside the second water-stopping assembly, and the second movable pipe 510 is connected to the pressure chamber 630. The high-pressure water in the outer drill pipe 100 can enter the pressure chamber 630 through the water outlet hole 511 to pressurize the pressure chamber 630. When the first water-stopping plug 300, the second water-stopping plug 500 and the pressure chamber 630 are depressurized, the relative position of the second movable pipe 510 and the second water-stopping assembly is the same as above, and will not be repeated here.

[0063] It can be understood that when the first waterstop plug 300 and the second waterstop plug 500 are in a pressurized state, the first waterstop plug 300 and the second waterstop plug 500 are tightly fitted to the inner wall of the borehole 700 respectively. At this time, the first waterstop component of the first waterstop plug 300 and the second waterstop component of the second waterstop plug 500 are fixed in position, and the relative sliding between the first movable tube 310 and the second movable tube 510 and the first waterstop component and the second waterstop component can be easily achieved. During actual use, the water outlet 511 can be located on the inner side of the second waterstop component before the rock stratification hydraulic communication detection device based on the rope coring drill tool of this embodiment is entered into the borehole 700. After inserting into the borehole 700, the first waterstop plug 300 and the second waterstop plug 500 are pressurized and then the relative positions of the first movable tube 310 and the second movable tube 510 and the first waterstop component and the second waterstop component are adjusted.

[0064] It can also be understood that the end of the water injection pipe 600 away from the second water stop plug 500 can be provided with an opening or can be blocked. When the end of the water injection pipe 600 away from the second water stop plug 500 is provided with an opening, while pressurizing the first water stop plug 300 and the second water stop plug 500 through the water outlet 511, the water injection pipe 600 injects water into the pressure chamber 630. When the pressure in the pressure chamber 630 (equal to the pressure in the first water stop plug 300 and the second water stop plug 500) reaches the pressure required by the first water stop plug 300 and the second water stop plug 500, the water outlet 511 of the first movable tube 310 and the second movable tube 510 is connected to the pressure chamber 630 to close the first water stop plug 300 and the second water stop plug 500. 00 and the second water-stop plug 500; when the water injection pipe 600 is blocked at one end away from the second water-stop plug 500, pressure is applied to the first water-stop plug 300 and the second water-stop plug 500 through the water outlet hole 511, and the water in the water injection pipe 600 will not enter the pressure chamber 630. When the first water-stop plug 300 and the second water-stop plug 500 reach the required pressure, the water outlet hole 511 moved by the first movable tube 310 and the second movable tube 510 is connected to the pressure chamber 630 to close the first water-stop plug 300 and the second water-stop plug 500, and water is injected into the pressure chamber 630.

[0065] In some embodiments, the first water-stopping assembly includes: a first water-stopping sleeve 320, a first retaining sleeve 330, and a first connecting pipe 340. The first water-stopping sleeve 320 is sleeved on the outside of the first movable tube 310, and a first water-stopping cavity is formed between the inner wall of the first water-stopping sleeve 320 and the outer wall of the first movable tube 310. Two first retaining sleeves 330 are provided, and the two first retaining sleeves 330 are respectively placed at both ends of the first water-stopping sleeve 320. The first retaining sleeve 330 can be slidably sleeved on the outside of the first movable tube 310, and the first retaining sleeve 330 is sleeved on the outside of one end of the first water-stopping sleeve 320 and fixedly connected to the first water-stopping sleeve 320. The first connecting pipe 340 is fixedly connected to the first retaining sleeve 330, and the first connecting pipe 340 is connected to the first water-stopping cavity.

[0066] The second water-stopping assembly includes: a second water-stopping sleeve 520, a second retaining sleeve 530, and a second connecting pipe 540. The second water-stopping sleeve 520 is sleeved on the outside of the second movable tube 510, and a second water-stopping cavity is formed between the inner wall of the second water-stopping sleeve 520 and the outer wall of the second movable tube 510. Two second retaining sleeves 530 are provided, and the two second retaining sleeves 530 are respectively placed at both ends of the second water-stopping sleeve 520. The second water-stopping sleeve 520 can be slidably sleeved on the outside of the second movable tube 510. The second retaining sleeve 530 is sleeved on the outside of one end of the second water-stopping sleeve 520 and is fixedly connected to the second water-stopping sleeve 520. The second connecting pipe 540 is fixedly connected to the second retaining sleeve 530, and the water inlet pipe is connected to the second water-stopping cavity and is connected to the first connecting pipe 340.

[0067] In this embodiment, the first waterproof sleeve 320 and the second waterproof sleeve 520 are flexible parts, which can expand and deform outward when subjected to internal pressure. The first retaining sleeve 330 and the second retaining sleeve 530 can form a seal at the positions of both ends of the first waterproof sleeve 320 and the second waterproof sleeve 520, and realize the relative sliding between the first movable tube 310 and the first retaining sleeve 330 and between the second movable tube 510 and the second retaining sleeve 530. The first connecting pipe 340 and the second connecting pipe 540 serve as pipelines connecting the first waterproof cavity and the second waterproof cavity. Since the first connecting pipe 340 and the second connecting pipe 540 are arranged between the first waterproof sleeve 320 and the second waterproof sleeve 520, they will not be squeezed by the first waterproof sleeve 320 and the second waterproof sleeve 520, which is conducive to ensuring the blocking effect of the first waterproof plug 300 and the second waterproof plug 500, and playing the role of protecting the pipeline.

[0068] In some embodiments, the connection mechanism 800 includes a spear scoop 810 and an extension tube set.

[0069] The spear scoop 810 can be inserted into the outer drill pipe 100. The spear scoop 810 is provided with a spring-cage mechanism 811. The spring-cage mechanism 811 is engaged with the outer drill pipe 100 to achieve the connection between the connecting mechanism 800 and the outer drill pipe 100. The spear scoop 810 has a water inlet hole 812, and the spear scoop 810 is provided with an inner hole. Water in the outer drill pipe 100 can enter the inner hole of the spear scoop 810 through the water inlet hole 812.

[0070] Optionally, the outer drill pipe 100 is provided with an ejection chamber 110 for accommodating the spear scooper 810 , and an ejection stopper 120 is fixedly provided on the inner wall of the ejection chamber 110 . The ejection stopper 120 can form a limit above the ejection mechanism 811 to improve the positioning stability of the spear scooper 810 and the outer drill pipe 100 .

[0071] The spring-cage structure in this embodiment can be a compression spring or an elastic sheet as an elastic member, and the pin connected to the elastic member can be an elastic pin structure of a locking member, etc., which is not specifically limited here. In addition, when it is necessary to remove, the spear scoop 810 can be taken out from the top of the outer drill pipe 100, and an unlocking structure can also be provided to unlock the spring-cage structure and take out the spear scoop 810 from the bottom of the outer drill pipe 100. In addition, the above-mentioned spear scoop 810 structure is only used as an example, as long as it can be connected and fixed with the outer drill pipe 100 and the inner hole can be connected with the inner cavity of the outer drill pipe 100 through the water inlet hole 812.

[0072] The extension pipe assembly includes a central pipe 820, an inner pipe 830 and a water stop ring 840. The central pipe 820 is located inside the outer drill pipe 100. One end of the central pipe 820 is connected to the spear scooper 810, and the other end is connected to the inner pipe 830. The central pipe 820 can be a reducer, which is convenient for connection with the spear scooper 810 and installation of the water stop ring 840.

[0073] One end of the inner tube 830 away from the central tube 820 extends to the outside of the outer drill tube 100 and communicates with the first water stop plug 300. When a drill bit 140 is provided at the end of the outer drill tube 100, the inner tube 830 passes through the hole in the center of the drill bit 140.

[0074] The water stop ring 840 is arranged between the center tube 820 and the outer drill tube 100. The position between the connecting mechanism 800 and the outer drill tube 100 below the water inlet hole 812 is blocked by the water stop ring 840. Optionally, a seat ring 130 is provided on the inner side of the outer drill tube 100. The water stop ring 840 is installed at the position of the seat ring 130 to stabilize the position of the water stop ring 840.

[0075] Optionally, the extension pipe assembly further includes a fixing ring 850, which is located between the inner pipe 830 and the outer drill pipe 100 and is fixedly connected to the inner pipe 830 and the outer drill pipe 100, respectively. By providing the fixing ring 850, it is possible to ensure that the rock formation stratification hydraulic communication detection device based on the rope coring drill is coaxial with the outer drill pipe 100, and to prevent the rock formation stratification hydraulic communication detection device based on the rope coring drill from shaking.

[0076] In some embodiments, the rock formation stratification hydraulic communication detection device based on the rope coring drill also includes multiple connecting pipes 200, and the first water stop plug 300 and the measuring pipe 400 and the second water stop plug 500 and the water injection pipe 600 are detachably connected through a connecting pipe 200 respectively.

[0077] The detachable connection makes it easy to disassemble and assemble the components, thereby facilitating replacement, maintenance, and reuse.

[0078] Combination Figure 5 Preferably, one end of the connecting pipe 200 is provided with an internal thread 210, and the other end of the connecting pipe 200 is provided with an external thread 220, and the connecting pipe 200 is threadedly connected with the first water stop plug 300, the measuring tube 400, the second water stop plug 500 or the water injection pipe 600 through the internal thread 210 or the external thread 220. For example, one end of the connecting pipe 200 having the external thread 220 is threadedly matched with the internal thread 210 of the first water stop plug 300 to achieve a detachable connection between the connecting pipe 200 and the first water stop plug 300, and one end of the connecting pipe 200 having the internal thread 210 is matched with the external thread 220 of the measuring tube 400 to achieve a detachable connection between the connecting pipe 200 and the measuring tube 400.

[0079] Through the threaded connection, on the one hand, a detachable connection between adjacent components is achieved, and on the other hand, the reliability of the connection is guaranteed, the structural strength is improved, and water leakage is prevented from affecting the measurement results.

[0080] In some embodiments, the connection tube 200 is provided with a through hole 230 for the signal lines of the first sensor 410 and the second sensor 610 to pass through. One end of the through hole 230 extends to the inner wall of the connection tube 200, and the other end extends to the outer wall of the connection tube 200.

[0081] Optionally, the detection device further includes a first signal line 420 and a second signal line 620, wherein the first signal line 420 is provided through a through hole 230 of a connecting tube 200 between the first water stop plug 300 and the measuring tube 400, one end of which is connected to the processor, and the other end is connected to the first sensor 410. The second signal line 620 is provided through a through hole 230 of a connecting tube 200 between the second water stop plug 500 and the water injection pipe 600, one end of which is connected to the processor, and the other end is connected to the second sensor 610.

[0082] Since the first water stop plug 300 and the second water stop plug 500 are squeezed and sealed with the inner wall of the borehole 700 when the first water stop plug 300 and the second water stop plug 500 are pressurized, the first signal line 420 and the second signal line 620 are arranged outside, which not only easily causes the signal line to be squeezed and damaged by the first water stop plug 300 and the second water stop plug 500, but also destroys the sealing property of the first signal line 420 and the second signal line 620, thereby affecting the measurement result. However, in the present embodiment, the first signal line 420 and the second signal line 620 can pass through the first water stop plug 300 and the second water stop plug 500 from the inside through the above arrangement, thereby protecting the first signal line 420 and the second signal line 620, and preventing the first signal line 420 and the second signal line 620 from destroying the sealing effect, which is conducive to improving the accuracy of the measurement.

[0083] Optionally, at the position of the perforation 230, the first signal line 420 and the second signal line 620 are interference-fitted with the connecting tube 200 to form a seal, or the first signal line 420 and the second signal line 620 are bonded and sealed with the connecting tube 200. Of course, the first signal line 420 and the second signal line 620 can also be sealed with the connecting tube 200 by adding a sealing member, etc. This can prevent water seepage between the inner side and the outer side of the connecting tube 200, which affects the detection effect.

[0084] In some embodiments of the present invention, the rock layer hydraulic connection detection device based on the rope coring drill also includes a pressure device, which is connected to the outer drill pipe 100 and is used to supply pressure to the first water stop plug 300, the second water stop plug 500 and the pressure chamber 630. The pressure device in this embodiment can be a water pump, and the pressure device can be the original pressure supply water pump of the outer drill pipe 100.

[0085] Optionally, the control system of the pressure device is communicated with the first sensor 410 and the second sensor 610, for example, through the first signal line 420 and the second signal line 620, and the control system of the pressure device adjusts the pressure in the first water stop plug 300, the second water stop plug 500 and the pressure chamber 630 according to the detection signals of the first sensor 410 and the second sensor 610.

[0086] Combination Figure 8 and Fig. 9 The embodiment of the present invention further provides a method for detecting hydraulic connection of rock strata based on a rope coring drill, which uses the device for detecting hydraulic connection of rock strata based on a rope coring drill of the above embodiment, and the method comprises:

[0087] S1. Pressurize the first water stop plug and the second water stop plug so that the inner wall of the borehole, the first water stop plug, the measuring tube and the second water stop plug form a detection cavity, and the inner wall of the borehole, the second water stop plug and the water injection tube form a pressure cavity. The process of pressurizing the first water stop plug and the second water stop plug is completed through the outer drill pipe.

[0088] S2. Pressurize the pressure chamber by driving the drill pipe.

[0089] Optionally, pressurizing the pressure chamber by driving the drill pipe includes: applying a first pressure to the pressure chamber in a first time period; applying a second pressure to the pressure chamber in a second time period; applying a third pressure to the pressure chamber in a third time period; applying a second pressure to the pressure chamber in a fourth time period; applying the first pressure to the pressure chamber in a fifth time period; wherein the first pressure is less than the second pressure, and the second pressure is less than the third pressure; wherein the target time period includes the second time period and the third time period. This pressurization method is a three-stage pressurization including five stages, and the pressurization sequence is P1-P2-P3-P4 (i.e., P2)-P5 (i.e., P1), wherein P1 is the first pressure, P2 is the second pressure, and P3 is the third pressure, wherein the first time period, the second time period, the third time period, the fourth time period, and the fifth time period are equal in duration, for example, all are 5 minutes.

[0090] S3. Detect the pressure in the detection chamber through the first sensor, and detect the pressure in the pressure chamber through the second sensor.

[0091] S4. The processor receives detection signals from the first sensor and the second sensor, and calculates a hydraulic connection value based on the detection signals from the first sensor and the second sensor, wherein the hydraulic connection value is a ratio of an increase in pressure in the detection chamber to an increase in pressure in the pressure chamber during a target time period.

[0092] Specifically, the calculation formula of the hydraulic connection value is:

[0093]

[0094] Among them, H is the hydraulic connection value, P b-1 is the pressure of the pressure chamber in the first time period, P m-3 is the pressure of the pressure chamber in the third time period, P m-1 is the pressure of the detection chamber in the first time period, P b-3 The pressure of the detection chamber during the third time period.

[0095] Optionally, when the first water-stopping plug includes a first movable tube and a first water-stopping assembly sleeved outside the first movable tube, and the second water-stopping plug includes a second movable tube and a second water-stopping assembly sleeved outside the second movable tube, and the second movable tube is provided with a water outlet, pressurizing the first water-stopping plug and the second water-stopping plug includes:

[0096] The water outlet is located inside the second water-stop assembly, the second movable pipe is connected to the second water-stop cavity, and the test water is injected by driving the drill pipe to pressurize the first water-stop plug and the second water-stop plug;

[0097] Pressurizing the pressure chamber by driving the drill pipe includes:

[0098] The second movable tube is driven to slide until the water outlet is located outside the second water stop assembly by driving the drill pipe, so that the second movable tube is connected to the pressure chamber, and test water is injected by driving the drill pipe to pressurize the pressure chamber.

[0099] Optionally, after the processor receives the detection signals of the first sensor and the second sensor, and calculates the hydraulic connection value based on the detection signals of the first sensor and the second sensor, the method further includes:

[0100] S5, stop pressurizing the pressure chamber, and stop pressurizing the first water stop plug and the second water stop plug;

[0101] S6, moving the rock stratification hydraulic connection detection device based on the rope coring drill to the next target position;

[0102] S7. Repeat steps S1 to S4 until all target positions are measured.

[0103] Optionally, after the processor receives the detection signals of the first sensor and the second sensor, and calculates the hydraulic connection value based on the detection signals of the first sensor and the second sensor, the method further includes:

[0104] S41. Setting a hydraulic connection grade classification rule, and determining the hydraulic connection grade based on the grade classification rule and the calculated hydraulic connection value.

[0105] For example, it is assumed that when H < 0.01, the hydraulic connection size is weak, when 0.01 ≤ H ≤ 0.1, the hydraulic connection is medium, and when H > 0.1, the hydraulic connection is strong.

[0106] For example, when the calculated hydraulic connection value is 0.05, the level of the hydraulic connection is determined to be a medium connection.

[0107] By classifying the hydraulic connection levels, the hydraulic connection strength of rock layers can be more intuitively characterized.

[0108] Before using this test method, also include:

[0109] S11, installing the connecting mechanism to the outer drill pipe;

[0110] S12, sequentially connect the first water stop plug, the measuring tube, the second water stop plug and the water injection pipe, and install the first sensor and the second sensor.

[0111] S13. Insert the stratum stratum hydraulic connection detection device based on the rope coring drill into the borehole, so that the stratum stratum hydraulic connection detection device based on the rope coring drill reaches the target position. The process of inserting the stratum stratum hydraulic connection detection device based on the rope coring drill into the borehole can be achieved by driving the drilling rig. In this embodiment, when the stratum stratum hydraulic connection detection device based on the rope coring drill reaches the target position, the stratum stratum hydraulic connection measurement at the target position can be achieved. When the borehole includes multiple positions to be measured, multiple target positions can be set to be measured in sequence according to a preset order, for example, from top to bottom, or from bottom to top.

[0112] The device and method for detecting hydraulic connection between strata based on a rope coring drill provided by the present invention solve the technical problem that the conventional water pressure test method in the prior art cannot measure the hydraulic connection between different rock strata, and realizes the evaluation of the permeability between the upper and lower rock masses, which can provide a data basis for accurately calculating the water pressure outside the tunnel.

[0113] 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 detection device for hydraulic connection of rock strata based on a rope coring drill, characterized in that: include: Rope coring tools, connection mechanisms and water pressure testing devices; The rope coring drill tool comprises a driving drill pipe and an outer drill pipe, wherein the outer drill pipe is connected to the driving drill pipe; The connecting mechanism is provided with a water inlet hole connected to the outer drill pipe, one end of the connecting mechanism is fixedly arranged in the outer drill pipe, and the other end extends to the outside of the outer drill pipe, and the position between the connecting mechanism and the outer drill pipe below the water inlet hole is blocked; The water pressure detection device comprises a first water stop plug, a measuring tube, a second water stop plug and a water injection pipe which are connected in sequence, as well as a first sensor, a second sensor and a processor. The end of the first water stop plug which is away from the measuring tube is connected to the connecting mechanism. When the first water stop plug, the measuring tube, the second water stop plug and the water injection pipe are located in a borehole and the first water stop plug and the second water stop plug are pressurized, the inner wall of the borehole, the first water stop plug, the measuring tube and the second water stop plug form a detection cavity, and the inner wall of the borehole, the second water stop plug and the water injection pipe form a pressure cavity. The first sensor is arranged on the outer side of the measuring tube and is used to detect the pressure in the detection cavity. A second sensor is arranged on the outside of the water injection pipe and is used to detect the pressure in the pressure chamber; wherein the connecting mechanism comprises: a spear scoop and an extension tube group, the spear scoop is provided with a spring-clamp mechanism, the spring-clamp mechanism is engaged with the outer drill pipe, and the spear scoop has the water inlet hole; the extension tube group comprises a central tube, an inner tube and a water stop ring, the central tube and the inner tube are located on the inner side of the outer drill pipe, one end of the central tube is connected to the spear scoop, and the other end is connected to the inner tube, the end of the inner tube away from the central tube extends to the outside of the outer drill pipe and is connected to the first water stop plug, the water stop ring is arranged between the central tube and the outer drill pipe, and the position between the connecting mechanism and the outer drill pipe below the water inlet hole is blocked by the water stop ring; A plurality of connecting pipes, wherein the outer drill pipe and the driving drill pipe, the first water stop plug and the measuring pipe, and the second water stop plug and the water injection pipe are connected respectively by a connecting pipe, and the connecting pipe is provided with a through hole for a signal line of the first sensor or the second sensor to pass through; A processor is communicatively connected to the first sensor and the second sensor, respectively, for receiving detection signals from the first sensor and the second sensor, and calculating a hydraulic connection value based on the detection signals from the first sensor and the second sensor, wherein the hydraulic connection value is a ratio of an increase in pressure in the detection chamber to an increase in pressure in the pressure chamber during a target time period.

2. The detection device for hydraulic connection of rock strata based on a rope coring drill according to claim 1, characterized in that: The first water-stopping plug comprises a first movable tube and a first water-stopping assembly sleeved on the outside of the first movable tube, one end of the first movable tube is connected to the connecting mechanism, and the other end is connected to the measuring tube, the first movable tube and the first water-stopping assembly are slidably sealed in contact, and a first water-stopping cavity is formed between the outer wall of the first movable tube and the inner wall of the first water-stopping assembly; The second water-stopping plug comprises a second movable tube and a second water-stopping assembly sleeved on the outside of the second movable tube, one end of the second movable tube is connected to the connecting mechanism, and the other end is connected to the measuring tube, the second movable tube and the second water-stopping assembly are slidably sealed in contact, a second water-stopping cavity is formed between the outer wall of the second movable tube and the inner wall of the second water-stopping assembly, the second water-stopping cavity is connected to the first water-stopping cavity by a pipeline, and the second movable tube is provided with a water outlet; Among them, when the second movable tube and the second water-stop component slide relative to each other until the water outlet hole is located inside the second water-stop component, the second movable tube is connected with the second water-stop cavity; when the second movable tube and the second water-stop component slide relative to each other until the water outlet hole is located outside the second water-stop component, the second movable tube is connected with the pressure cavity.

3. The detection device for hydraulic connection of rock strata based on a rope coring drill according to claim 2, characterized in that: The first water-stop assembly comprises: A first waterproof sleeve is sleeved on the outer side of the first movable tube, and the first waterproof cavity is formed between the inner wall of the first waterproof sleeve and the outer wall of the first movable tube; A first retaining sleeve, two of which are provided, and the two first retaining sleeves are respectively disposed at the two ends of the first waterproof jacket, the first retaining sleeve is slidably sleeved on the outside of the first movable tube, the first retaining sleeve is sleeved on the outside of one end of the first waterproof jacket, and is fixedly connected to the first waterproof jacket; A first connecting pipe, fixedly connected to the first retaining sleeve, the first connecting pipe being connected to the first water stop cavity; The second water-stop assembly comprises: A second waterproof sleeve is sleeved on the outer side of the second movable tube, and the second waterproof cavity is formed between the inner wall of the second waterproof sleeve and the outer wall of the second movable tube; A second retaining sleeve, two second retaining sleeves are provided, the two second retaining sleeves are respectively disposed at the two ends of the second waterproof sleeve, the second retaining sleeve is slidably sleeved on the outside of the second movable tube, the second retaining sleeve is sleeved on the outside of one end of the second waterproof sleeve, and is fixedly connected to the second waterproof sleeve; The second communicating pipe is fixedly connected to the second retaining sleeve, and the second communicating pipe is communicated with the second water-stopping cavity and the first communicating pipe.

4. The detection device for hydraulic connection of rock strata based on a rope coring drill according to claim 1, characterized in that: The extension tube set also includes: A fixing ring is located between the inner tube and the outer drill tube and is fixedly connected to the inner tube and the outer drill tube respectively.

5. The detection device for hydraulic connection of rock strata based on a rope coring drill according to any one of claims 1 to 3, characterized in that: One end of the connecting pipe is provided with an internal thread, and the other end of the connecting pipe is provided with an external thread, and the connecting pipe is threadedly connected with the driving drill pipe, the external drill pipe, the first water stop plug, the measuring pipe, the second water stop plug or the water injection pipe through the internal thread or the external thread; The connecting pipe is provided with a through hole for a signal line of the first sensor or the second sensor to pass through.

6. The detection device for hydraulic connection of rock strata based on a rope coring drill according to any one of claims 1 to 3, characterized in that: Also includes: A pressure device is communicated with the outer drill pipe and is used to supply pressure to the first water-stopping plug, the second water-stopping plug and the pressure chamber.

7. A method for detecting hydraulic connection of rock strata based on a rope coring drill, using the device for detecting hydraulic connection of rock strata based on a rope coring drill as claimed in any one of claims 1 to 6, characterized in that: include: S1, applying pressure to the first water-stopping plug and the second water-stopping plug, so that the inner wall of the borehole, the first water-stopping plug, the measuring tube and the second water-stopping plug form a detection cavity, and the inner wall of the borehole, the second water-stopping plug and the water injection pipe form a pressure cavity; S2, pressurizing the pressure chamber through the outer drill pipe; S3, detecting the pressure in the detection chamber by the first sensor, and detecting the pressure in the pressure chamber by the second sensor; S4. The processor receives the detection signals of the first sensor and the second sensor, and calculates a hydraulic connection value based on the detection signals of the first sensor and the second sensor, wherein the hydraulic connection value is a ratio of an increment of the pressure in the detection chamber to an increment of the pressure in the pressure chamber within a target time period, and a calculation formula for the hydraulic connection value is: Where H is the hydraulic connection value, is the pressure of the pressurized chamber during the first time period, is the pressure of the pressurized chamber during the third time period, is the pressure of the measuring chamber during the first time period, measuring the pressure of the cavity during a third time period; S5, stop pressurizing the pressure chamber, and stop pressurizing the first water-stopping plug and the second water-stopping plug; S6, moving the rock stratum hydraulic connection detection device to the next target position; S7. Repeat steps S1 to S4 until all target positions are measured.

8. The method for detecting hydraulic connection of rock strata based on a rope coring drill according to claim 7, characterized in that: When the first water-stopping plug includes a first movable tube and a first water-stopping assembly sleeved outside the first movable tube, and the second water-stopping plug includes a second movable tube and a second water-stopping assembly sleeved outside the second movable tube, and the second movable tube is provided with a water outlet, pressurizing the first water-stopping plug and the second water-stopping plug includes: The water outlet is located inside the second water-stop assembly, the second movable pipe is connected to the second water-stop cavity, and the test water is injected by driving the drill pipe to pressurize the first water-stop plug and the second water-stop plug; Pressurizing the pressure chamber by driving the drill pipe comprises: The second movable tube is driven by the driving drill pipe to slide until the water outlet is located outside the second water-stopping assembly, so that the second movable tube is connected to the pressure chamber, and test water is injected by the driving drill pipe to pressurize the pressure chamber.

9. The method for detecting hydraulic connection of rock strata based on a rope coring drill according to claim 8, characterized in that: After the processor receives the detection signals of the first sensor and the second sensor, and calculates the hydraulic connection value based on the detection signals of the first sensor and the second sensor, the method further includes: S41. Setting a hydraulic connection grade classification rule, and determining the hydraulic connection grade based on the grade classification rule and the calculated hydraulic connection value.

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