Water jet mechanical combined drilling tool, drilling rock breaking test platform and method thereof

Abstract

The invention provides a water jet mechanical combined drilling tool, a drilling rock breaking test platform and a method thereof.A drill bit is arranged at the end of a drilling tool body, a containing cavity is formed in the drilling tool body, and a plurality of jet pipelines are arranged in the containing cavity; a plurality of groups of drilling tooth mechanisms are circumferentially distributed on the drill bit, and each drilling tooth mechanism comprises a plurality of drilling teeth; a plurality of water outlet holes are formed in the drill bit, water jet tail end nozzles are arranged in the water outlet holes, the water jet tail end nozzles are correspondingly connected with the jet pipeline, the water outlet holes are formed in interval areas between different sets of drill tooth mechanisms, and the distances between the water outlet holes and the center position of the drill bit are different. The tunneling work of the water jet mechanical combined drilling machine can be achieved, and rapid tunneling and ultra-long tunneling are achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of drilling and rock breaking, and in particular relates to a water jet mechanical combined drilling tool, a drilling and rock breaking test platform and a method thereof. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] Mechanical drilling tools have the advantages of large crushing size and high operating efficiency. They have been widely used in mining, construction engineering, resource exploration and other fields. However, when mechanical methods are used to drill hard rock (compressive strength greater than the set value), the rock crushing mechanism and the cutter are subjected to greater impact and wear, making the working environment of the equipment more severe, and reducing reliability and work efficiency. When engineering drilling equipment encounters high-strength, highly abrasive hard rock, abnormal equipment wear, breakage, and machine and drill jamming often occur, resulting in outstanding problems such as extremely slow construction speed and extremely low efficiency. This seriously affects the overall construction period.

[0004] How to achieve efficient crushing of hard rock has become a problem and difficulty that needs to be solved urgently. It is urgent to study new rock crushing methods to achieve efficient crushing of hard rock, which is of great significance to achieving efficient tunnel excavation, efficient mining and even efficient development of energy resources.

[0005] Among many new rock breaking methods, water jet technology is a technology with high safety and high excavation efficiency, and has very broad application potential. However, how to combine water jet technology with traditional drilling tools to improve excavation efficiency and how to quickly connect drill rods to achieve ultra-long and ultra-fast drilling are issues that need to be solved. Summary of the invention

[0006] In order to solve the above problems, the present invention proposes a water jet mechanical combined drilling tool, a drilling and rock breaking test platform and a method thereof. The present invention can realize the excavation work of the water jet mechanical combined drilling rig, and realize rapid excavation and ultra-long excavation.

[0007] According to some embodiments, the present invention adopts the following technical solutions:

[0008] A water jet mechanical combined drilling tool comprises a drilling tool body, the end of the drilling tool body is a drill bit, a receiving cavity is arranged inside the drilling tool body, and a plurality of jet pipelines are arranged in the receiving cavity;

[0009] The drill bit is provided with a plurality of groups of drill tooth mechanisms distributed circumferentially, each drill tooth mechanism comprising a plurality of drill teeth;

[0010] The drill bit is provided with a plurality of water outlet holes, in which water jet terminal nozzles are provided, and the water jet terminal nozzles are correspondingly connected to the jet pipeline. The water outlet holes are provided in the interval areas between different groups of drill tooth mechanisms, and the distances between the water outlet holes and the center position of the drill bit are different.

[0011] As an optional implementation, an arc sensor is provided on the edge of the drill bit between two adjacent sets of drill tooth mechanisms to detect the current rock strength and integrity, current drilling position and offset.

[0012] As an optional embodiment, the drilling tooth mechanism includes three groups, which are evenly distributed on the drill bit; each group of drilling tooth mechanism includes a plurality of rows, and each row includes a plurality of cutting teeth.

[0013] As an optional embodiment, a wireless control switch is provided on the rear side of the drill bit, and each wireless control switch corresponds to a water jet terminal nozzle to control the action of the corresponding water jet terminal nozzle.

[0014] A water jet mechanical combined drilling and rock breaking test platform comprises the above-mentioned water jet mechanical combined drilling tool, as well as a rock clamping device, a drilling tool actuator, a high-pressure jet pump group and a central control system, wherein:

[0015] The water jet mechanical combined drilling tool is arranged at the front end of the drilling tool actuator, and the rock clamping device is arranged in front of the drilling tool actuator;

[0016] The drilling tool actuator includes a drill rod connected to the water jet mechanical combined drilling tool, the drill rod is connected to a driving mechanism, and a swivel joint is provided at the rear end of the drill rod for connecting a jet pipeline and an abrasive high-pressure jet pipeline in the water jet mechanical combined drilling tool; the drill rod and the driving mechanism are arranged on a movable guide rail, a horizontal movement adjustment mechanism is provided at the lower end of the movable guide rail to drive the movable guide rail to move horizontally, and an angle adjustment mechanism is also provided at the lower end of the movable guide rail to adjust the angle of the movable guide rail in the vertical direction;

[0017] The high-pressure jet pump group is connected to the abrasive high-pressure jet pipeline to provide high-pressure jet fluid for the water jet terminal nozzle;

[0018] The central control system is used to control the actions of various regulating mechanisms, the movement of the drill rod, the operation of the water jet mechanical combined drilling tool and the work of the high-pressure jet pump group.

[0019] As an optional embodiment, the test platform includes a base, a movable track arranged along a first horizontal direction is provided on the base, a movable bottom plate is movably provided on the movable track, an angle adjustment mechanism is provided on the movable bottom plate, a movable guide rail is provided on the angle adjustment mechanism, the movable guide rail is arranged along a second horizontal direction, a drill rod is movably provided on the movable guide rail, and a height adjustment mechanism is provided below the drill rod;

[0020] The test platform is provided with a limited position support to limit the moving distance of the drill rod.

[0021] As an optional embodiment, the driving mechanism includes a forward power mechanism and a rotary power mechanism, the rotary power mechanism is sleeved on the outside of the drill rod, and the forward power mechanism is sleeved on the outside of the drill rod.

[0022] As an optional embodiment, the drill rod includes a multi-section drill rod structure, and each section of the drill rod mechanism is detachably connected. The two ends of each section of the drill rod mechanism are respectively a male head and a female head, and the male head and the female head are adapted to each other. At least one head is provided with a sealing cone surface, and the interior of each section of the drill rod mechanism is a hollow structure.

[0023] As an optional embodiment, the rock clamping device includes a fixed frame, an adjustable clamping mechanism is arranged in the fixed frame, the clamping mechanism is used to clamp and fix the rock sample, and a jet slag collection device is arranged at the lower end of the fixed frame.

[0024] As an optional implementation, the fixed frame is provided with protective baffles around its periphery and is also equipped with an air pump device or a water cleaning device.

[0025] The working method of the water jet mechanical combined drilling and rock breaking test platform comprises the following steps:

[0026] Clamp the rock sample and apply confining pressure;

[0027] Adjust the position of the drilling rig actuator to align it with the target position of the rock sample;

[0028] Adjust the angle of the drill actuator so that it is aligned with the target position of the rock sample at the target angle;

[0029] Connect the high-pressure jet pump group and the abrasive high-pressure jet pipeline;

[0030] Start the driving mechanism, start the high-pressure jet pump group, and use the water jet mechanical combined drilling tool for drilling. When the drill bit rotates to excavate and break the rock, the nozzle at the end of the water jet shoots out from the gap between the drill bits. While excavating, high-pressure jet is used. The pressure of the ejected mixed abrasive water jet is used to cut a crack network on the surface of the rock, and the mechanical drilling tool then performs penetrating rock breaking.

[0031] As a further step, when the current length of drill rod is excavated, unscrew the drill rod connection, move the drive mechanism backward as a whole, install the new drill rod structure, extend the overall drill rod length, and start the drive mechanism again to achieve quick connection of the drill rod.

[0032] As a further step, the arc sensor is used to detect the current rock strength, rock integrity, drilling position and offset, and the corresponding water jet end nozzle is controlled by a wireless control switch. The reaction force is used to open another water jet end nozzle in the direction opposite to the offset to break up the hard rock environment and return the drill bit and drill rod to the correct forward direction.

[0033] As a further step, a drilling speed model is constructed based on the test data:

[0034] H1=Vs λ1 *P λ2 *d λ3 *F λ4

[0035] Among them, Vs is the drill bit rotation speed, P is the pump pressure of the pump group, d is the nozzle diameter, F is the drilling thrust, λi is the undetermined coefficient, and H1 is the drilling speed.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] The present invention provides a novel combined drilling tool, which combines a high-pressure water jet and a drilling tool, and a plurality of holes are opened at the water outlet end of the drilling tool, each hole has a different radius from the center of the drill bit and is evenly distributed with the drill teeth of the drilling tool. When the drill bit rotates to dig and break the rock, the nozzle at the end of the water jet shoots out from the gap between the drill bits, and high-pressure jet is used while digging; the mixed abrasive water jet ejected by the high-pressure jet has a high pressure, which cuts a crack network on the surface of the high-hard rock, and then the traditional drilling tool is penetrated and the rock is broken, and the rock breaking efficiency is significantly improved.

[0038] The new combined drilling tool of the present invention can also realize directional correction. The current drilling position and offset are determined by sensors, and the switch of the jet hole (or the water jet end nozzle) is controlled by a wireless control switch. The reaction force is used to open the corresponding jet hole in the direction opposite to the offset, thereby breaking the hard rock environment and allowing the drill bit and drill rod to slowly return to the correct forward direction.

[0039] The present invention is also provided with a protection mechanism and a cleaning mechanism. The entire experimental platform is equipped with a protection baffle. When the water jet drilling rig is working, the scattered water of the water jet is restrained in the test bench area by the protection baffle. The test bench is equipped with an air pump device or a water cleaning device to clean the abrasive and residues remaining on the drilling rig actuator during the experiment.

[0040] Drill pipe deslagging: The drill pipe is hollow inside, seeFigure 6 During normal construction, the drill rig rotates and the water jet is turned on. As more rock debris is produced by the drill bit, the water jet blows the rock debris into the hollow pipe wall and discharges it out of the hole as the drill rig rotates.

[0041] The present invention provides a water jet mechanical combined drilling and rock breaking test platform, in which the drilling actuator includes front and rear excavation devices, an angle adjustment device and a horizontal adjustment device, which can move the position and angle of the drill rod and the drill bit to achieve multi-angle and all-round posture adjustment to ensure that its drilling trajectory is the expected trajectory, and also help to select a suitable angle to simulate the real excavation posture.

[0042] The drill rod of the present invention is moved backward by the driving mechanism to make room for connecting a new rod. The inner center of the new rod is hollow for transmitting water jet medium, which can realize rapid connection of the drill rod and barrier-free transmission of abrasive water jet medium, and high-pressure water is sealed by the conical surface design of the connection.

[0043] The present invention can also realize the automatic deviation correction function.

[0044] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The accompanying drawings in the specification, which constitute a part of the present invention, 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 improper limitations on the present invention.

[0046] Figure 1 This is the overall structural diagram of the water jet mechanical combined drilling tool experimental platform;

[0047] Figure 2 It is a schematic diagram of the structure of the drilling tool actuator;

[0048] Figure 3 A cross-sectional view of the new water jet mechanical combined drilling rig and the quick-connect drill pipe;

[0049] Figure 4 It is the front view of the water jet mechanical combined drilling tool;

[0050] Figure 5 It is a schematic diagram of a high-pressure water jet hydrostatic separation rotary joint;

[0051] Figure 6 This is a structural schematic diagram of a drill pipe slag removal device;

[0052] Among them, 100 is the foundation pit of the experimental platform;

[0053] 200 is a rock clamping device;

[0054] 300 is a drilling tool actuator, 301 is a water jet mechanical combined drilling tool, 302 is a drill rod, 303 is a height adjustment device, 304 is a rotary power motor, 306 is a forward power motor, 307 is a swivel joint and a swivel joint clamping device, 308 is an abrasive high-pressure jet pipeline, 309 is a forward and backward moving guide rail, 310 is a left and right adjustment servo motor, 311 is an angle adjustment flange, 312 is a left and right adjustment guide rail, 313 is a jet slag collection device, 314 is a jet baffle, and 315 is a confining pressure loading rock fixing plate;

[0055] 3010 is a jet injection hole, 3011 is a ring sensor, 3012 is a sand guide tube, 3013 is a sand guide tube fixing nut, 3014 is a conventional PDC tooth, 3016 is a slag discharge low-pressure water inlet hole, 3017 is a reverse drilling tooth, 3018 is a jet wireless control switch 1, and 3019 is a jet wireless control switch 2;

[0056] 3021 is the low-pressure water inlet hole of the drill pipe;

[0057] 400 is a high-pressure jet pump group;

[0058] 500 is the central control system of water jet mechanical joint drilling rig. DETAILED DESCRIPTION

[0059] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0060] It should be noted that the following detailed descriptions are all illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0061] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0062] In the absence of conflict, the embodiments in this application and the features in the embodiments may be combined with each other.

[0063] Embodiment 1

[0064] A water jet mechanical combined drilling tool, such as Figure 4 As shown, the combined drilling tool is composed of a high-pressure water jet and a traditional drilling tool, and specifically includes a drilling tool body, the end of the drilling tool body is a drill bit, the drilling tool body is provided with an accommodating cavity inside, and a plurality of jet pipelines are provided in the accommodating cavity;

[0065] The drill bit is provided with a plurality of groups of drill tooth mechanisms distributed circumferentially, each drill tooth mechanism comprising a plurality of drill teeth;

[0066] The drill bit is provided with a plurality of water outlet holes (or jet injection holes 3010 or jet holes), and a water jet terminal nozzle is provided in the water outlet hole. The water jet terminal nozzle and the jet pipeline are correspondingly connected. The water outlet holes are provided in the interval area between different groups of drill tooth mechanisms, and each water outlet hole has a different distance from the center position of the drill bit.

[0067] In this embodiment, a sand guide tube 3012 is also provided in the jet injection hole 3010. The sand guide tube 3012 is fixed in the jet injection hole 3010 by a sand guide tube fixing nut 3013. The installation position of the sand guide tube 3012 is at the very end of the water jet, close to the object to be cut. Its main function is to guide and resist wear of the mixed abrasive.

[0068] The jet pipeline transfers the medium mixed with abrasive water jet through the inside of the drill bit. During the rotation of the mechanical drill bit, the high-pressure abrasive water jet is ejected outward at the same time to form a fracture network and reduce rock stress.

[0069] The drilling tool is close to the drill bit side, with two to three water outlet holes distributed on circles with different radii. The jet forms different trajectories and is evenly distributed within the circle of the drill bit diameter.

[0070] In this embodiment, the drilling tooth mechanism is a traditional PDC tooth 3014.

[0071] An arc sensor or a circular ring sensor 3011 is arranged on the edge of the drill bit between two adjacent sets of drill tooth mechanisms to sense rock strength, rock integrity, and detect the current drilling position and offset.

[0072] In this embodiment, the drill tooth mechanism is a conventional PDC tooth 3014 including three groups, which are evenly arranged on the drill bit; each group of drill tooth mechanism includes a plurality of rows, and each row includes a plurality of cutting teeth.

[0073] A wireless control switch (in the figure, jet wireless control switch 1 3018 and jet wireless control switch 2 3019) is arranged on the rear side of the drill bit, and each wireless control switch corresponds to a water jet end nozzle to control the action of the corresponding water jet end nozzle.

[0074] Drill pipe deslagging: The drill pipe is hollow inside, see Figure 6The inside of the drill pipe is hollow in a fan shape evenly divided at 120 degrees. The end of each cavity is a low-pressure water inlet hole 3021 of the drill pipe, and one end of the drill bit is provided with a plurality of low-pressure water inlet holes 3016 for slag removal. During normal construction, the drilling rig rotates and the water jet is turned on. Low-pressure slag removal water enters from the low-pressure water inlet hole 3021 of the drill pipe and exits from the low-pressure water inlet hole 3016 for slag removal, and the rock slag generated during the rotation of the drill tool is discharged from the outer wall of the drill pipe out of the hole.

[0075] In some embodiments, the diameter of the drill rod is smaller than the diameter of the drill bit. After the drill bit drills a hole, there is space on the outer wall of the drill rod for discharging rock debris. When the drilling rig is started and the high-pressure jet works, the rock debris generated during the drilling process is flushed by low-pressure water and discharged out of the hole through the gaps between the drill teeth of the drill tool and the outer wall of the drill rod in turn.

[0076] In this embodiment, the drilling tool combines water jet with traditional drill bit at the drill bit, which can realize the simultaneous execution of high-pressure water jet and drilling.

[0077] Embodiment 2

[0078] A water jet mechanical combined drilling tool experimental platform, such as Figure 1 As shown, it is arranged in the foundation pit 100 of the experimental platform, and includes the combined drilling tool and drilling actuator, the ultra-high pressure pump group, the protection mechanism and the cleaning mechanism of the first embodiment. The following is a detailed introduction:

[0079] Drilling actuators, such as Figure 2 As shown, including:

[0080] The rock clamping device 200 is used to fix the rock sample and can also load the rock sample with confining pressure to simulate the real underground burial environment. The rock clamping device 200 includes a plurality of confining pressure loading rock fixing plates 315 to tightly fix the rock sample and evenly pressurize the surface of the rock sample.

[0081] The front and rear excavation device includes a drill rod 302 and a driving mechanism. The drill rod 302 is connected to a combined drilling tool. There are limit support columns on both sides of the rear of the drill rod 302 to limit the combined drilling tool in the forward and backward directions.

[0082] In this embodiment, the whole machine excavation relies on the motor to provide rotational power and propulsion power, that is, the driving mechanism is mainly a motor, including a rotational power motor 304 and a forward power motor 306, which are used to drive the rotation and advancement of the drill rod 302 respectively.

[0083] The drill rod 302, the rotary power motor 304 and the forward power motor 306 are arranged on a slider on the forward and backward moving guide rail 309, and the slider can move forward and backward along the forward and backward moving guide rail 309 to adjust the distance between the drill and the rock sample. The forward and backward moving guide rail 309 is also provided with a height adjustment device 303 on the upper and lower parts to adjust the overall height of the drill, and the forward and backward moving guide rail 309 is also provided with an angle adjustment flange 311 on the upper and lower parts to adjust the overall angle of the drill. The above structure is arranged on a fixed plate, and the fixed plate is movably arranged on the left and right adjustment guide rails 312. The fixed plate is driven by the left and right adjustment servo motor 310 to adjust the position of the drill in the horizontal direction.

[0084] In this embodiment, an angle adjustment flange 311 is provided on the limit support column. When the drilling forward angle needs to be adjusted, the angle flange 311 is slightly adjusted to adjust the elevation or depression angle of the drilling rig, so as to select a suitable angle and simulate a real excavation posture.

[0085] like Figure 3 As shown, the end of the drill rod 302 is connected with a swivel joint and a swivel joint clamping device 307, which is used to connect the abrasive high-pressure jet pipeline 308 and the jet pipeline in the combined drilling tool. The swivel joint is a high-pressure water jet static separation swivel joint, such as Figure 5 As shown, the abrasive high-pressure jet is continuously supplied when the drill rod 302 rotates. The abrasive high-pressure jet pipeline 308 is connected to the high-pressure jet pump group 400.

[0086] In this embodiment, in order to realize continuous excavation of drill rods, rapid excavation, and rapid connection of drill rods, the structure of the drill rod 302 is hollow, and both ends of the drill rod 302 are compatible connectors. Specifically, when the excavation of the drill rod is completed and needs to be connected, the rotary power motor 304 and the forward power motor 306 remove the interface and move back to make room for connecting a new rod. The inner center of the new rod is hollow for the transmission of water jet media.

[0087] In this embodiment, the two sides of the new drill rod are respectively a male head and a female head. The thread size of the male head and the female head are the same, and the thread depth of the male head is slightly longer. When connecting the new rod, a rubber gasket is placed at the connection, and the male head and the female head are tightened. There is a 60-degree cone surface on the male head, which matches the female head, and then the high-pressure water is sealed through the cone surface.

[0088] Because the drill rod of the drilling rig is too long, when encountering uneven rock hardness, the drill rod is easily offset, that is, the drill is off-center. This embodiment uses a ring sensor 3011, a jet wireless control switch 1 3018, a jet wireless control switch 2 3019 and a jet system to solve this problem. The ring sensor 3011 can detect the current drilling position and offset, and the jet wireless control switch 1 3018 and the jet wireless control switch 2 3019 are used to control the switch of the nozzle in the corresponding jet hole. The reaction force is used to open the nozzle in the corresponding jet hole in the opposite direction of the offset, break the hard rock environment, and let the drill bit and drill rod slowly return to the correct forward direction.

[0089] In some embodiments, micro sensors are installed on the front and side of the drill bit to obtain real-time trajectory, torque, rock strength, drilling depth and / or temperature data. The drilling depth H1 is combined with the drilling rig speed, drilling thrust, water jet pump pressure, jet nozzle diameter, etc. to establish a drilling speed model.

[0090] H1=Vs λ1 *P λ2 *d λ3 *F λ4

[0091] Among them, Vs is the drill bit rotation speed, P is the pump pressure of the pump group, d is the nozzle diameter, F is the drilling thrust, λi is the undetermined coefficient, and H1 is the drilling speed.

[0092] In this embodiment, the drilling actuator has multi-angle and all-round continuous drilling. The drill rod integrates the high-pressure water jet pipeline, which can realize the rapid replacement and installation of the drill rod. The drill rods are connected by threaded connection, and the high-pressure water and abrasive inside the drill rod are sealed by taper. The drilling actuator can fully simulate the real excavation posture and obtain various parameters of the real excavation. During the drilling process of the drilling actuator, the water jet reverse thrust can be used to correct the position according to the feedback position of the sensor.

[0093] In some embodiments, the drill bit is also provided with a tooth-retracting and excavating function. When the drill bit encounters a hole collapse or the like, the drill rig is turned on in reverse to increase the tooth-retracting and excavating function, that is, when exiting in reverse, it can also excavate and exit, thus solving problems such as drill sticking.

[0094] In addition, the entire experimental platform is equipped with a protective baffle or jet baffle 314, which is arranged beside the confining pressure loading rock fixing plate 315. When the water jet drilling rig is working, the scattered water of the water jet is constrained by the jet baffle 314 in the test bench area.

[0095] The experimental platform includes a base, on which the drilling actuator and the rock clamping device 200 are arranged. A jet rock slag collecting device 313 is also arranged at the lower end of the rock clamping device 200 to carry the cut rock slag and jet abrasive.

[0096] The test bench is equipped with an air pump device or a water cleaning device. During the experiment, the air pump device is used to spray gas or the water cleaning device is used to spray water to clean the remaining abrasives and residues on the drilling rig actuator.

[0097] The drilling tool actuator 300 , the high-pressure jet pump group 400 and the combined drilling tool are all controlled by the central control system 500 of the water jet mechanical combined drilling rig.

[0098] This embodiment has the advantages of high efficiency, convenient replacement of drill rods, and sensing while drilling based on sensors on the drilling tools. The system can have a set of drilling depth models, and can perform ultra-fast excavation and realistic simulation under experimental environment conditions.

[0099] Embodiment 3

[0100] The working method of the second embodiment comprises the following steps:

[0101] Clamp the rock sample and apply confining pressure;

[0102] Adjust the position of the drilling rig actuator to align it with the target position of the rock sample;

[0103] Adjust the angle of the drill actuator so that it is aligned with the target position of the rock sample at the target angle;

[0104] Connect the high-pressure jet pump group and the abrasive high-pressure jet pipeline;

[0105] Start the driving mechanism, start the high-pressure jet pump group, and use the water jet mechanical combined drilling tool for drilling. When the drill bit rotates to excavate and break the rock, the nozzle at the end of the water jet shoots out from the gap between the drill bits. While excavating, high-pressure jet is used. The pressure of the ejected mixed abrasive water jet is used to cut a crack network on the surface of the rock, and the mechanical drilling tool then performs penetrating rock breaking.

[0106] Specifically, turn on the main power supply of the experimental platform, turn on the water jet mechanical combined drilling rig central control system 500, and turn on the high-pressure jet pump group 400 in sequence. If the experimental platform is equipped with a drilling rig hydraulic station and an oil cooling system, the drilling rig hydraulic station and the oil cooling system are also turned on.

[0107] Clamp the rock to the rock clamping device 200, place it in the designated position and load the confining pressure. After the water jet combined drilling hydraulic station is loaded, adjust the drilling rig actuator. According to the actual environment and experimental needs, the height adjustment device 303 is adjusted to adjust the up and down position, and the left and right adjustment servo motor 310 is adjusted to drive the left and right adjustment guide rails 312 and the slider to move relative to achieve left and right position adjustment. The angle of elevation and depression is adjusted by adjusting the angle adjustment flange 311. The swivel joint is mainly composed of two parts, static and dynamic, to achieve the rotational transmission of high-pressure abrasive water jet media. Through the above adjustment, after adjusting the incident angle, turn on the drilling rig rotation power motor 304 and the forward power motor 306, turn on the high-pressure jet pump group 400, and then drive the water jet mechanical combined drilling tool 301 to rotate for rapid excavation.

[0108] When a drill rod is excavated, unscrew the drill rod connection, move the drilling rig's rotary power motor 304 and forward power motor 306 backward as a whole, install a new drill rod, tighten the taper seal on the drill rod, and continue to turn on the drilling rig's rotary power motor 304 and forward power motor 306 to achieve the purpose of quick connection of the drill rod and rapid excavation.

[0109] Since rock slag and other waste materials will be generated during the excavation process, a jet rock slag collection device 313 is added, and since the high-pressure abrasive water jet will have a strong reaction force, a safety protection device jet baffle 314 is added.

[0110] The specific implementation method of directional correction is to determine the direction of correction according to the current jet hole position and offset feedback from the circular sensor 3011. When the drill rod is offset downward, slightly adjust the angles of jet holes one and two so that the jet holes are directly above. At this time, turn on the upper jet wireless control switch one 3018 or the jet wireless control switch two 3019, turn on the high-pressure jet pump group 400, and dot in a directional manner to break the hard material in front or leave space. After the directional dot of the water jet is completed, turn on the drilling rig and continue to move forward. If there is still a deviation of the drill rod and drill tool in the later stage, the same treatment method is used.

[0111] Through the above design, the excavation work of the water jet machinery combined with the drilling rig is realized, and fast excavation and ultra-long excavation are achieved.

[0112] 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 by those skilled in the art within the spirit and principle of the present invention without creative labor shall be included in the protection scope of the present invention.

Claims

1. A water jet mechanical combined drilling tool, characterized in that: It comprises a drilling tool body, the end of the drilling tool body is a drill bit, the drilling tool body is provided with a receiving cavity inside, and a plurality of jet pipelines are provided in the receiving cavity; The drill bit is provided with a plurality of groups of drill tooth mechanisms distributed circumferentially, each drill tooth mechanism comprising a plurality of drill teeth; The drill bit is provided with a plurality of water outlet holes, in which water jet terminal nozzles are provided, and the water jet terminal nozzles are correspondingly connected to the jet pipeline. The water outlet holes are provided in the interval areas between different groups of drill tooth mechanisms, and the distances between the water outlet holes and the center position of the drill bit are different.

2. A water jet mechanical combined drilling tool as claimed in claim 1, characterized in that: An arc sensor is arranged on the edge of the drill bit between two adjacent sets of drill tooth mechanisms to sense rock strength, rock integrity, and detect the current drilling position and offset.

3. The water jet mechanical combined drilling tool as claimed in claim 1, characterized in that: The drilling tooth mechanism comprises three groups, which are evenly arranged on the drill bit; each group of drilling tooth mechanism comprises a plurality of rows, and each row comprises a plurality of cutting teeth; A wireless control switch is arranged at the rear side of the drill bit, and each wireless control switch corresponds to a water jet terminal nozzle to control the action of the corresponding water jet terminal nozzle.

4. A water jet mechanical combined drilling and rock breaking test platform, characterized in that: The invention comprises the water jet mechanical combined drilling tool as claimed in any one of claims 1 to 3, as well as a rock clamping device, a drilling tool actuator, a high-pressure jet pump group and a central control system, wherein: The water jet mechanical combined drilling tool is arranged at the front end of the drilling tool actuator, and the rock clamping device is arranged in front of the drilling tool actuator; The drilling tool actuator includes a drill rod connected to the water jet mechanical combined drilling tool, the drill rod is connected to a driving mechanism, and a swivel joint is provided at the rear end of the drill rod for connecting a jet pipeline and an abrasive high-pressure jet pipeline in the water jet mechanical combined drilling tool; the drill rod and the driving mechanism are arranged on a movable guide rail, a horizontal movement adjustment mechanism is provided at the lower end of the movable guide rail to drive the movable guide rail to move horizontally, and an angle adjustment mechanism is also provided at the lower end of the movable guide rail to adjust the angle of the movable guide rail in the vertical direction; The high-pressure jet pump group is connected to the abrasive high-pressure jet pipeline to provide high-pressure jet fluid for the water jet terminal nozzle; The central control system is used to control the actions of various regulating mechanisms, the movement of the drill rod, the operation of the water jet mechanical combined drilling tool and the work of the high-pressure jet pump group.

5. A water jet mechanical combined drilling and rock breaking test platform as claimed in claim 4, characterized in that: The test platform comprises a base, a movable track arranged along a first horizontal direction is arranged on the base, a movable bottom plate is movably arranged on the movable track, an angle adjustment mechanism is arranged on the movable bottom plate, a movable guide rail is arranged on the angle adjustment mechanism, the movable guide rail is arranged along a second horizontal direction, a drill rod is movably arranged on the movable guide rail, and a height adjustment mechanism is arranged below the drill rod; The test platform is provided with a limited position support to limit the moving distance of the drill rod.

6. A water jet mechanical combined drilling and rock breaking test platform as claimed in claim 4, characterized in that: The driving mechanism comprises a forward power mechanism and a rotary power mechanism, wherein the rotary power mechanism is sleeved on the outside of the drill rod, and the forward power mechanism is sleeved on the outside of the drill rod; Or, the forward driving mechanism is a bidirectional driving structure; Or, the drill rod comprises a multi-section drill rod structure, each section of the drill rod mechanism is detachably connected, the two ends of each section of the drill rod mechanism are respectively a male head and a female head, the male head and the female head are adapted to each other, at least one head is provided with a sealing cone surface, and the interior of each section of the drill rod mechanism is a hollow structure; The diameter of the drill rod is smaller than the diameter of the drill bit. When the drilling rig and the high-pressure water jet work normally to drill into the rock, the low-pressure water channel is opened, and the low-pressure water channel flows into the drill bit through the hollow drill rod, and the rock debris generated by drilling is taken out of the hole through the outer wall of the drill rod, thereby realizing the function of removing debris in the hole.

7. A water jet mechanical combined drilling and rock breaking test platform as claimed in claim 4, characterized in that: The rock clamping device comprises a fixed frame, an adjustable clamping mechanism is arranged in the fixed frame, the clamping mechanism is used to clamp and fix the rock sample, and a jet rock slag collecting device is arranged at the lower end of the fixed frame; The fixed frame is provided with protective baffles around its periphery and is also equipped with an air pump device or a water cleaning device.

8. The working method of the water jet mechanical combined drilling and rock breaking test platform according to any one of claims 4 to 7, characterized in that: The following steps are involved: Clamp the rock sample and apply confining pressure; Adjust the position of the drilling rig actuator to align it with the target position of the rock sample; Adjust the angle of the drill actuator so that it is aligned with the target position of the rock sample at the target angle; Connect the high-pressure jet pump group and the abrasive high-pressure jet pipeline; Start the driving mechanism, start the high-pressure jet pump group, and use the water jet mechanical combined with the drilling tool to drill. When the drill bit rotates to dig and break the rock, the nozzle at the end of the water jet shoots out from the gap between the drill bits. While digging, the high-pressure jet is used to cut a crack network on the surface of the rock by using the pressure of the ejected mixed abrasive water jet, and then the mechanical drilling tool performs penetration rock breaking; After the current length of drill rod is excavated, unscrew the drill rod connection, move the drive mechanism backward as a whole, install the new drill rod structure, extend the overall drill rod length, start the drive mechanism, and realize quick connection of the drill rod.

9. The working method according to claim 8, characterized in that: Arc sensors are used to sense rock strength, rock integrity, current drilling position and offset conditions. Wireless control switches are used to control the switches of corresponding water jet end nozzles. Reaction force is used to open other water jet end nozzles in the direction opposite to the offset condition to break up the hard rock environment and return the drill bit and drill rod to the correct forward direction.

10. The working method according to claim 9, characterized in that: According to the test data, the drilling speed model is constructed: H1=Vs λ1 *P λ2 *d λ3 *F λ4 Among them, Vs is the drill bit rotation speed, P is the pump pressure of the pump group, d is the nozzle diameter, F is the drilling thrust, λi is the undetermined coefficient, and H1 is the drilling speed.

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