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

Abstract

The application provides a water jet mechanical combined drilling tool, a drilling rock breaking test platform and a method thereof. An end of a drilling tool body is a drill bit. An accommodating cavity is arranged in the drilling tool body. A plurality of jet pipelines are arranged in the accommodating cavity. A plurality of groups of drill tooth mechanisms are circumferentially distributed on the drill bit. Each drill tooth mechanism comprises a plurality of drill teeth. A plurality of water outlets are arranged on the drill bit. Water jet end nozzles are arranged in the water outlets. The water jet end nozzles are correspondingly connected with the jet pipelines. The water outlets are arranged in interval regions between different groups of drill tooth mechanisms. Distances from the water outlets to a center position of the drill bit are different. The application can realize tunneling work of the water jet mechanical combined drilling tool, and realize rapid tunneling and super-long tunneling.

Description

Technical Field

[0001] This invention belongs to the field of drilling and rock breaking technology, specifically relating to a water jet mechanical combined drilling tool, a drilling and rock breaking test platform and method. Background Technology

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

[0003] Mechanical drilling tools offer advantages such as large-scale rock breaking and high operating efficiency, and are widely used in mining, construction, and resource exploration. However, when drilling hard rock (with compressive strength exceeding a set value) using mechanical methods, the rock breaking mechanism and cutting tools experience increased impact and wear, making the working environment harsher and reducing reliability and efficiency. When engineering drilling equipment encounters high-strength, highly abrasive hard rock, abnormal wear, breakage, and jamming often occur, leading to extremely slow construction speed and very low efficiency, severely impacting the overall project schedule.

[0004] How to achieve efficient crushing of hard rock has become an urgent problem and challenge. It is imperative to study new rock crushing methods to achieve efficient crushing of hard rock, which is of great significance for achieving efficient tunnel excavation, efficient mining, and even efficient development of energy resources.

[0005] Among numerous novel rock-breaking methods, waterjet technology stands out as a highly safe and efficient method with vast application potential. However, several challenges remain to be addressed: how to integrate waterjet technology with traditional drilling tools to improve drilling efficiency, and how to quickly connect drill rods for ultra-long and ultra-fast drilling. Summary of the Invention

[0006] To address the aforementioned problems, this invention proposes a waterjet-mechanical combined drilling tool, a drilling and rock-breaking test platform, and a method thereof. This invention enables the tunneling operation of the waterjet-mechanical combined drilling rig, achieving rapid tunneling and ultra-long tunneling.

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

[0008] A waterjet mechanical combined drilling tool includes a drilling tool body, the end of which is a drill bit, and a receiving cavity is provided inside the drilling tool body, and a plurality of jet pipelines are provided inside the receiving cavity.

[0009] The drill bit has several sets of drill tooth mechanisms distributed circumferentially, and each drill tooth mechanism includes multiple drill teeth.

[0010] The drill bit is provided with several water outlet holes, and each water outlet hole is provided with a water jet end nozzle. The water jet end nozzle and the jet pipeline are connected accordingly. The water outlet holes are located in the interval area between different groups of drill teeth, and each water outlet hole is at a different distance from the center of the drill bit.

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

[0012] As an alternative implementation, the drill tooth mechanism includes three groups, which are evenly distributed around the drill bit; each group of drill tooth mechanism includes several rows, and each row includes several cutting teeth.

[0013] As an alternative implementation, a wireless control switch is provided on the rear side of the drill bit, with each wireless control switch corresponding to a water jet end nozzle to control the operation of the corresponding water jet end nozzle.

[0014] A waterjet-mechanical combined drilling rock-breaking test platform includes the aforementioned waterjet-mechanical combined drilling tool, as well as a rock clamping device, a drilling tool actuator, a high-pressure jet pump set, and a central control system, wherein:

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

[0016] The drilling tool actuator includes a drill rod connected to a waterjet mechanical combined drilling tool. The drill rod is connected to a drive mechanism. A rotary joint is provided at the rear end of the drill rod for connecting the jet pipeline and the abrasive high-pressure jet pipeline in the waterjet mechanical combined drilling tool. The drill rod and the drive mechanism are mounted on a moving guide rail. A horizontal movement adjustment mechanism is provided at the lower end of the moving guide rail to drive the moving guide rail to move horizontally. An angle adjustment mechanism is also provided at the lower end of the moving guide rail to adjust the angle of the moving guide rail in the vertical direction.

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

[0018] The central control system is used to control the actions of each regulating mechanism, the movement of the drill rod, the operation of the water jet mechanical drilling tool, and the operation of the high-pressure jet pump set.

[0019] As an alternative implementation, the test platform includes a base, on which a moving track is provided along a first horizontal direction, a movable base plate is movably provided on the moving track, an angle adjustment mechanism is provided on the movable base plate, a moving guide rail is provided on the angle adjustment mechanism, the moving guide rail is provided along a second horizontal direction, a drill rod is movably provided on the moving guide rail, and a height adjustment mechanism is provided below the drill rod.

[0020] The test platform is equipped with limit supports to limit the movement distance of the drill rod.

[0021] As an alternative implementation, the drive mechanism includes a forward power mechanism and a rotary power mechanism, wherein the rotary power mechanism is sleeved on the outside of the drill pipe and the forward power mechanism is sleeved on the outside of the drill pipe.

[0022] As an alternative implementation, the drill rod includes a multi-section drill rod structure, with each section detachably connected. Each section has a male and a female end, which are compatible with each other. At least one end is provided with a sealing conical surface, and the interior of each section is a hollow structure.

[0023] As an alternative implementation, the rock clamping device includes a fixed frame, an adjustable clamping mechanism is provided inside the fixed frame for clamping and fixing the rock sample, and a jet rock debris collection device is provided at the lower end of the fixed frame.

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

[0025] The working method of the above-mentioned water jet mechanical combined drilling rock breaking test platform includes 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 drilling rig's 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 set and the abrasive high-pressure jet pipeline;

[0030] Start the drive mechanism and start the high-pressure jet pump set. Use the water jet mechanical drilling tool to drill. While the drill bit rotates to excavate and break the rock, the nozzle at the end of the water jet is ejected from the gap between the drill bits. High-pressure jetting is carried out while excavating. The pressure of the sprayed mixed abrasive water jet is used to cut a network of fractures on the surface of the rock. Then the mechanical drilling tool performs penetration rock breaking.

[0031] As a further step, once the drill rod of the current length has been excavated, the drill rod connection is unscrewed, the drive mechanism is moved backward as a whole, a new drill rod structure is installed, the overall length of the drill rod is extended, and the drive mechanism is restarted to achieve quick drill rod connection.

[0032] As a further step, the current rock strength, rock integrity, drilling position, and offset are detected by the arc sensor. The corresponding water jet end nozzle is controlled by a wireless control switch. Using the reaction force, another water jet end nozzle is opened in the opposite direction to the offset, breaking up the hard rock environment and allowing the drill bit and drill rod to return to the correct direction of advance.

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

[0034]

[0035] Where Vs is the drill bit rotation speed, P is the pump pressure, d is the nozzle diameter, and F is the drilling thrust. For undetermined coefficients, This represents the drilling speed.

[0036] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0037] This invention provides a novel combined drilling tool that integrates high-pressure water jet and drilling tool. The water outlet end of the drilling tool has several holes, each with a different radius from the center of the drill bit, and these holes are evenly distributed with the drill teeth of the drilling tool. While the drill bit rotates to excavate and break rocks, the nozzle at the end of the water jet ejects water from the gaps between the drill bits, providing high-pressure jetting while excavating. The high-pressure jet sprays a mixed abrasive water jet with high pressure, cutting a network of fractures on the surface of hard rock, which is then penetrated and broken by the traditional drilling tool, significantly improving the rock breaking efficiency.

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

[0039] This invention also includes a protective mechanism and a cleaning mechanism. The entire experimental platform is equipped with protective baffles, which confine the scattered water jet within the test platform area during operation. The test platform is equipped with an air pump or water cleaning device to remove residual abrasive and slag from the drilling rig's actuators during the experiment.

[0040] Drill pipe slag removal: The drill pipe has a hollow internal structure, see... Figure 6During normal construction, the drilling rig rotates and the water jet is activated. 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 drilling rig rotates.

[0041] This invention provides a waterjet mechanical combined drilling rock breaking test platform, wherein the drilling actuator includes a front and rear tunneling device, an angle adjustment device and a horizontal adjustment device, which can move the position and angle of the drill rod and drill bit to achieve multi-angle and all-round attitude adjustment to ensure that its drilling trajectory is the desired trajectory, and also helps to select a suitable angle to simulate the real tunneling posture.

[0042] The drill rod of the present invention moves backward through a drive mechanism to make room for the connection of a new rod. The new rod has a hollow center to facilitate the transmission of water jet medium. This enables rapid connection of drill rods and unobstructed transmission of abrasive water jet medium. Furthermore, the conical surface design at the connection point ensures high-pressure water sealing.

[0043] This invention can also achieve automatic correction function.

[0044] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0045] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0046] Figure 1 A schematic diagram of the overall structure of the waterjet mechanical combined drilling experimental platform;

[0047] Figure 2 This is a schematic diagram of the drill string actuator structure;

[0048] Figure 3 Cross-sectional view of a new type of waterjet mechanical drilling rig and rapid drill pipe splicing;

[0049] Figure 4 A front view of a waterjet mechanical drilling tool;

[0050] Figure 5 Schematic diagram of a rotary joint for high-pressure water jet static-dynamic separation;

[0051] Figure 6 This is a schematic diagram of the 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 the drilling tool actuator, 301 is the water jet mechanical combined drilling tool, 302 is the drill rod, 303 is the height adjustment device, 304 is the rotary power motor, 306 is the forward power motor, 307 is the rotary joint and rotary joint clamping device, 308 is the abrasive high-pressure jet pipeline, 309 is the front and rear moving guide rail, 310 is the left and right adjustment servo motor, 311 is the angle adjustment flange, 312 is the left and right adjustment guide rail, 313 is the jet rock debris collection device, 314 is the jet baffle, and 315 is the confining pressure loading rock fixing plate;

[0055] 3010 is the jet injection hole, 3011 is the ring sensor, 3012 is the sand guide tube, 3013 is the sand guide tube fixing nut, 3014 is the traditional PDC tooth, 3016 is the slag discharge low-pressure water inlet hole, 3017 is the reverse drill tooth, 3018 is the jet wireless control switch one, and 3019 is the jet wireless control switch two.

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

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

[0058] The 500 is the central control system for a waterjet mechanical drilling rig. Detailed Implementation

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

[0060] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

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

[0062] Where there is no conflict, the embodiments and features described in this application may be combined with each other.

[0063] Example 1

[0064] A waterjet mechanical combined drilling tool, such as Figure 4 As shown, the combined drilling tool consists of a high-pressure water jet and a traditional drilling tool, specifically including a drilling tool body, the end of which is a drill bit, and a receiving cavity is provided inside the drilling tool body, and several jet pipelines are provided inside the receiving cavity.

[0065] The drill bit has several sets of drill tooth mechanisms distributed circumferentially, and each drill tooth mechanism includes multiple drill teeth.

[0066] The drill bit is provided with several water outlet holes (or jet injection holes 3010 or jet holes), and water jet end nozzles are provided in the water outlet holes. The water jet end nozzles are connected to the jet pipelines. The water outlet holes are located in the interval area between different groups of drill teeth, and each water outlet hole is at a different distance from the center of the drill bit.

[0067] In this embodiment, a sand guide tube 3012 is also provided inside the jet injection hole 3010. The sand guide tube 3012 is fixed inside 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 being cut. Its main function is to guide and wear-resistant the mixed abrasive.

[0068] The jet pipeline transmits the medium after the abrasive water jet is mixed through the inside of the drill bit. During the rotation of the mechanical drill bit, the high-pressure abrasive water jet is sprayed outward at the same time, forming a fracture network and reducing rock stress.

[0069] Two to three water outlet holes are opened near the drill bit side of the drill bit, distributed on circles of different radii, and the water jets form different trajectories, evenly distributed within the circle of the drill bit diameter.

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

[0071] Between two adjacent sets of drill bit mechanisms, an arc-shaped sensor or a circular sensor 3011 is set on the edge of the drill bit to sense rock strength, rock integrity, detect the current drilling position and offset.

[0072] In this embodiment, the drill tooth mechanism is a traditional PDC tooth 3014 comprising three groups, evenly distributed around the drill bit; each group of drill teeth mechanism comprises several rows, and each row comprises several cutting teeth.

[0073] Wireless control switches are installed on the rear side of the drill bit (the two wireless control switches in the figure are 3018 and 3019 respectively). Each wireless control switch corresponds to the water jet end nozzle to control the operation of the corresponding water jet end nozzle.

[0074] Drill pipe slag removal: The drill pipe has a hollow internal structure, see... Figure 6The drill rod has a hollow, fan-shaped interior divided at 120-degree angles. Each cavity has a low-pressure water inlet hole 3021 at one end, and the drill bit has several low-pressure water inlets 3016 for slag removal at one end. During normal operation, the drilling rig rotates, and the water jet is activated. Low-pressure slag removal water enters through the drill rod's low-pressure water inlet hole 3021 and exits through the slag removal water inlet hole 3016, discharging the rock cuttings generated during drill rotation along the outer wall of the drill rod into the borehole.

[0075] In some embodiments, the diameter of the drill rod is smaller than the diameter of the drill bit. After the drill bit drills the hole, there is space on the outer wall of the drill rod to discharge rock cuttings. When the drilling rig is started and the high-pressure jet is working, the rock cuttings generated during the drilling process are flushed by low-pressure water and discharged out of the hole through the gaps between the drill teeth of the drill bit and the outer wall of the drill rod.

[0076] In this embodiment, the drilling tool combines water jetting with a traditional drill bit at the drill bit, enabling simultaneous high-pressure water jetting and drilling.

[0077] Example 2

[0078] A waterjet mechanical combined drilling experimental platform, such as Figure 1 As shown, the system is located within the experimental platform pit 100 and includes the combined drilling tool and drilling actuator of Example 1, an ultra-high pressure pump set, a protection mechanism, and a cleaning mechanism. A detailed description follows:

[0079] Drill into the actuator, such as Figure 2 As shown, it includes:

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

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

[0082] In this embodiment, the tunneling of the whole machine is powered by the rotation and propulsion of the motor. That is, the drive mechanism is mainly a motor, including a rotary power motor 304 and a forward power motor 306, which are used to drive the rotation and forward movement of the drill rod 302, respectively.

[0083] The drill pipe 302, rotary power motor 304, and forward power motor 306 are mounted on a slider on the front-to-back moving guide rail 309. The slider can move back and forth along the front-to-back moving guide rail 309 to adjust the distance between the drill bit and the rock sample. Height adjustment devices 303 are also provided above and below the front-to-back moving guide rail 309 to adjust the overall height of the drill bit. Angle adjustment flanges 311 are also provided above and below the front-to-back moving guide rail 309 to adjust the overall angle of the drill bit. The above structure is mounted on a fixed plate, which is movably mounted on a left-to-right adjusting guide rail 312. The fixed plate is driven by a left-to-right adjusting servo motor 310, which can adjust the horizontal position of the drill bit.

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

[0085] like Figure 3 As shown, the end of drill rod 302 is connected to a rotary joint and a rotary joint clamping device 307, used to connect the abrasive high-pressure jet pipeline 308 and the jet pipeline inside the combined drilling tool. The rotary joint is a high-pressure water jet hydrostatic separation rotary joint, such as... Figure 5 As shown, this ensures a continuous supply of high-pressure abrasive jets while the drill rod 302 rotates. The high-pressure abrasive jet pipeline 308 is connected to the high-pressure jet pump set 400.

[0086] In this embodiment, to achieve continuous drilling, rapid drilling, and rapid drill rod splicing, the drill rod 302 has a hollow structure, and both ends of the drill rod 302 are compatible connectors. Specifically, when the drill rod is completed and splicing is required, the rotary power motor 304 and the forward power motor 306 are disconnected and moved to make room for splicing the new rod. The new rod has a hollow center for the transmission of water jet medium.

[0087] In this embodiment, the new drill pipe has a male end and a female end on each side. The male and female ends have the same thread size, but the male end has a slightly longer thread depth. When connecting the new pipe, a rubber washer is placed at the connection point, and the male and female ends are tightened. The male end has a 60-degree conical surface that matches the female end, thereby achieving a high-pressure water seal through the conical surface.

[0088] Because the drill rod is too long, it is prone to deviation when encountering rocks with uneven hardness. This embodiment uses a combination of a ring sensor 3011, a jet wireless control switch 3018, a jet wireless control switch 3019, and a jet system to solve this problem. The ring sensor 3011 can detect the current drilling position and deviation. The jet wireless control switches 3018 and 3019 control the opening and closing of the nozzles in the corresponding jet holes. Using a reaction force, the nozzles in the corresponding jet holes open in the opposite direction to the deviation, breaking up the hard rock environment and allowing the drill bit and drill rod to slowly return to the correct direction of travel.

[0089] In some embodiments, miniature sensors are also installed on the drill bit's face and sides to acquire real-time data such as trajectory, torque, rock strength, drilling depth, and / or temperature. This data will be used to determine the drilling depth. A drilling speed model is established by combining drilling rig speed, drilling thrust, water jet pump pressure, and jet nozzle diameter.

[0090]

[0091] Where Vs is the drill bit rotation speed, P is the pump pressure, d is the nozzle diameter, and F is the drilling thrust. For undetermined coefficients, This represents the drilling speed.

[0092] In this embodiment, the drilling actuator features multi-angle, omnidirectional continuous drilling. The drill rod integrates a high-pressure water jet pipeline, enabling rapid replacement and installation. Drill rods are connected by threads, and the internal sealing of the high-pressure water and abrasive is achieved through a tapered design. The drilling actuator can completely simulate real tunneling behavior and acquire various parameters of actual tunneling. During drilling, the actuator can use water jet thrust to correct its position based on sensor feedback.

[0093] In some embodiments, the drill bit is also equipped with a tooth-retracting excavation function. When the drill bit encounters a cave-in or other situation, the drill rig is turned on in reverse to increase the tooth-retracting excavation function. That is, when retracting in reverse, it can also excavate and withdraw, thus solving problems such as stuck drill bit.

[0094] In addition, the entire experimental platform is equipped with protective baffles or jet baffles 314. The jet baffles 314 are set next to 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 in the test platform area by the jet baffles 314.

[0095] The experimental platform includes a base, on which the drilling actuator and rock clamping device 200 are mounted. A jet cuttings collection device 313 is also installed at the lower end of the rock clamping device 200 to collect the cut rock cuttings and jet abrasive.

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

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

[0098] This embodiment has advantages such as high efficiency, convenient drill pipe replacement, ability to sense while drilling based on sensors on the drill string, and the ability to carry a drilling depth model, enabling ultra-fast tunneling and realistic simulation under experimental conditions.

[0099] Example 3

[0100] The working method of Example 2 includes 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 drilling rig's 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 set and the abrasive high-pressure jet pipeline;

[0105] Start the drive mechanism and start the high-pressure jet pump set. Use the water jet mechanical drilling tool to drill. While the drill bit rotates to excavate and break the rock, the nozzle at the end of the water jet is ejected from the gap between the drill bits. High-pressure jetting is carried out while excavating. The pressure of the sprayed mixed abrasive water jet is used to cut a network of fractures on the surface of the rock. Then the mechanical drilling tool performs penetration rock breaking.

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

[0107] The rock is clamped into the rock clamping device 200, placed in the designated position, and confining pressure is applied. After the hydraulic station of the water jet combined drilling is loaded, the drilling rig actuator is adjusted. Based on the actual environment and experimental needs, the vertical position is adjusted by adjusting the height adjustment device 303, and the horizontal position is adjusted by adjusting the left and right adjustment servo motor 310 to drive the left and right adjustment guide rails 312 and the slider to move relative to each other. The elevation and depression angles are adjusted by adjusting the angle adjustment flange 311. The rotary joint mainly consists of two parts, a moving and a stationary part, to realize the rotational transmission of the high-pressure abrasive water jet medium. After adjusting the above, and after adjusting the incident angle, the drilling rig's rotary power motor 304 and forward power motor 306 are turned on, and the high-pressure jet pump set 400 is turned on, thereby driving the water jet mechanical combined drilling tool 301 to rotate for rapid excavation.

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

[0109] Because rock debris and other waste materials are generated during the tunneling process, a jet rock debris collection device 313 is added. Because 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 for directional correction is as follows: based on the current position and offset of the jet orifice fed back by the ring sensor 3011, the direction of correction is determined. When the drill rod is offset downwards, the angles of jet orifices one and two are slightly adjusted so that the jet orifices are directly above. At this time, the upper jet wireless control switch one 3018 or jet wireless control switch two 3019 is turned on, and the high-pressure jet pump group 400 is turned on to perform directional drilling, breaking up hard objects in front or creating space. After the water jet directional drilling is completed, the drilling rig is turned on and continues to advance. If the drill rod and drill bit are still offset later, the same method is used.

[0111] The above design enables the tunneling operation of the water jet mechanical drilling rig, achieving rapid tunneling and ultra-long tunneling.

[0112] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made by those skilled in the art without creative effort within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A working method of a water jet mechanical combined drilling rock breaking test platform, characterized in that, The water jet mechanical combined drilling rock breaking test platform comprises a water jet mechanical combined drilling tool, a rock clamping device, a drilling tool actuator, a high-pressure jet pump group and a central control system. The water jet mechanical combined drilling tool comprises a tool body, an end of the tool body being a drill bit, an accommodating cavity being arranged inside the tool body, a plurality of jet pipelines being arranged in the accommodating cavity, a plurality of groups of tooth mechanisms being circumferentially distributed on the drill bit, each tooth mechanism comprising a plurality of drill teeth, a plurality of water outlets being arranged on the drill bit, a water jet end nozzle being arranged in each water outlet, the water jet end nozzle and the jet pipeline being correspondingly connected, the water outlets being arranged in interval regions between different groups of tooth mechanisms, and distances from the water outlets to a center position of the drill bit being different. The water jet mechanical combined drilling tool is arranged at a 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 comprises a drill rod connected with the water jet mechanical combined drilling tool, the drill rod being connected with a driving mechanism, a rotary joint being arranged at a rear end of the drill rod and being used for connecting the jet pipeline and the abrasive high-pressure jet pipeline in the water jet mechanical combined drilling tool, the drill rod and the driving mechanism being arranged on a moving guide rail, a horizontal movement adjusting mechanism being arranged at a lower end of the moving guide rail to drive the moving guide rail to move horizontally, an angle adjusting mechanism being further arranged at the lower end of the moving guide rail to adjust an angle of the moving guide rail in a vertical direction, the high-pressure jet pump group being connected with the abrasive high-pressure jet pipeline to provide high-pressure jet fluid for the water jet end nozzle. The central control system is used for controlling actions of the adjusting mechanisms, movement of the drill rod, operation of the water jet mechanical combined drilling tool and work of the high-pressure jet pump group. The working method comprises the following steps. Clamp the rock sample and load the confining pressure. Adjust the position of the drilling tool actuator to align the target position of the rock sample. Adjust the angle of the drilling tool actuator to align the target position of the rock sample at the target angle. Connect the high-pressure jet pump group with the abrasive high-pressure jet pipeline. Start the driving mechanism and the high-pressure jet pump group, and use the water jet mechanical combined drilling tool to drill, when the drill bit rotates to dig and break the rock, the water jet end nozzle is ejected from the gap between the drill bits, the high-pressure jet is used to dig, the pressure of the ejected mixed abrasive water jet is used to cut the crack network on the surface of the rock, and then the mechanical drilling tool is used to break the rock in a penetrating manner. After the drill rod of the current length is drilled, the drill rod connection is unscrewed, the driving mechanism is moved backward as a whole, the new drill rod structure is loaded, the length of the whole drill rod is extended, the driving mechanism is started, and the drill rod is quickly connected. The arc-shaped sensor is used to sense the rock strength, the rock integrity, detect the current drilling position and the bias condition, the wireless control switch is used to control the switch of the corresponding water jet end nozzle, the reaction force is used to open the other water jet end nozzle in the opposite direction of the bias condition, the hard rock environment is broken, and the drill bit and the drill rod return to the correct advancing direction. According to the test data, a drilling speed model is constructed. Wherein, Vs is the bit rotation speed, P is the pump group pump pressure, d is the nozzle diameter, F is the drilling thrust, is the undetermined coefficient, is the drilling speed.

2. The method of claim 1, wherein the step of operating comprises the step of: The edge of the drill bit is provided with an arc-shaped sensor between two adjacent drill tooth mechanisms, which is used for sensing rock strength, rock integrity, detecting current drilling position and biasing condition.

3. The method of claim 1, wherein the step of operating comprises: The drill tooth mechanism includes three groups which are uniformly arranged on the drill bit in a circle; each group of drill tooth mechanism includes several rows, and each row includes several cutting teeth. The rear side of the drill bit is provided with a wireless control switch corresponding to each water jet end nozzle to control the action of the corresponding water jet end nozzle.

4. The method of claim 1, wherein the step of operating comprises the step of: The test platform includes a base provided with a moving track arranged in a horizontal first direction, a moving base plate movably arranged on the moving track, an angle adjusting mechanism arranged on the moving base plate, a moving guide rail arranged on the angle adjusting mechanism in a horizontal second direction, and a drill rod movably arranged on the moving guide rail and provided with a height adjusting mechanism below. The test platform is provided with a limiting support to limit the movement distance of the drill rod.

5. The method of claim 1, wherein the step of operating comprises: The driving mechanism includes an advancing power mechanism and a rotating power mechanism, the rotating power mechanism is sleeved outside the drill rod, and the advancing power mechanism is sleeved outside the drill rod. The advancing power mechanism is a bidirectional driving structure.

6. The method of claim 1, wherein the step of operating comprises: The drill rod includes a plurality of drill rod structures, each drill rod structure is detachably connected between the drill rod structures, two ends of each drill rod structure are respectively a male head and a female head, the male head and the female head are matched, at least one head is provided with a sealing cone surface, and the inside of each drill rod structure is a hollow structure. The diameter of the drill rod is smaller than the diameter of the drill bit, when the drilling machine and the high-pressure water jet normally work to drill into the rock, the low-pressure water channel is opened, 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 hole slag removal function.

7. The method of claim 1, wherein the step of operating comprises the step of: The rock clamping device includes a fixed frame, an adjustable clamping mechanism arranged in the fixed frame, the clamping mechanism is used for clamping and fixing a 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 a protective baffle around, and is also provided with a gas pump device and a water cleaning device.

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