A directional drilling tool for top cutting and pressure relief used in mining machinery

Abstract

The present application provides a top-cutting and pressure-relieving directional drilling tool for mining machinery, the directional drilling tool comprises: a directional drill barrel connected to the top of the drill rod, and a hole-reaming drill barrel; the directional drilling tool also comprises a borehole plugging guide device; the borehole plugging guide device comprises: a positioning block slidably mounted on the drill rod, and a plugging guide plate connected to the positioning block; the first side of the plugging guide plate is hingedly connected to the positioning block, the second side of the plugging guide plate is connected to the positioning block through a tension spring, and the top of the adjusting arm is equipped with a telescopic rod mechanism for pressing the plugging guide plate to be in a first setting state and a second setting state. In the present application, by adopting the above-mentioned reinforced guide barrel connected between the directional drill barrel and the hole-reaming drill barrel, the torsional deflection generated during drilling can be effectively offset, the connection stability can be enhanced, and the stable operation of the equipment can be ensured under the premise of controlling the inclination state of the hole, saving the mining and operation costs; at the same time, the retained drill cuttings are used for guiding protection to effectively protect the working environment.

Description

Technical Field

[0001] The present application relates to the technical field of mining machinery, and in particular to a top-cutting and pressure-relieving directional drilling tool used in mining machinery. Background Art

[0002] The purpose of mining along the goaf is to recycle the protective coal pillars left in the traditional mining method. The green coal mining process of leaving the tunnel of the previous section for the next section can maximize the recovery of coal resources and avoid coal losses caused by leaving coal pillars. An average of 9.45 tons of coal can be mined per meter, saving coal resources and avoiding waste. It can also save at least 3,500 yuan per meter by digging one less tunnel.

[0003] When mining the next section, in order to prevent the roof from deforming, it is necessary to remove the pressure by cutting the roof of the goaf-retained roadway. Different cutting angles have a significant impact on the stress distribution of the coal pillar and the deformation of the roadway. The selection of the cutting angle is directly related to the pressure relief effect and the stability of the roadway structure. For example: Through numerical simulation analysis, it is found that when the cutting angle (relative to the horizontal plane) in the aquifer roadway is between 85° and 60°, the angle stress of the coal pillar shows a "hump" trend, especially at angles of 55° and 50°. The angle stress at the peak point of the coal pillar stress at 3 m is less than the angle stress at the peak point of 7 m. This shows that the appropriate cutting angle can effectively reduce the surrounding rock stress and meet the needs of normal mining at the working face.

[0004] Under the condition of composite roof, the optimal cutting height is 7 meters, and the optimal cutting angle in the vertical direction relative to the horizontal plane is 15°. After adopting this angle for cutting and unloading the roof, the control effect of the tunnel is significant, and the movement of the roof and bottom plates and the displacement of the tunnel walls are kept in a stable state, laying the foundation for saving coal in mining by retaining tunnels along the goaf.

[0005] The top cutting height and the optimal top cutting angle are achieved by drilling the top cutting pressure relief borehole. The hole depth and drilling angle of the borehole on the roof are the final top cutting height and top cutting angle. However, the actual drilling and theoretical design direction often produce inconsistent deflection changes. If the deflection of the borehole is very small, the impact is not large; if the deflection develops seriously, it will not only have an adverse effect on the drilling quality and drilling efficiency, but also seriously affect the optimal top cutting height and optimal top cutting angle of the top cutting pressure relief, making the tunnel roof unstable, increasing the tunnel support cost, not conducive to economical mining, but also poses a safety hazard. Therefore, it is necessary to master a series of technical issues from the occurrence to the treatment of the hole deflection, so as to control the hole deflection in the deep hole within the allowable deviation value required by the regulations. In addition, with existing small-angle inclined drilling equipment, drill cuttings fall during the gradual drilling process and directly fall onto the rotary machine, causing damage to the health of on-site construction workers and the rotary drilling equipment. At the same time, as the drilling depth continues to increase, the amount of fallen drill cuttings floating is large, causing great pollution to the construction scene, which does not meet the requirements of green construction standards. Summary of the invention

[0006] The present application provides a top-cutting and pressure-relieving directional drilling tool for mining machinery, which reduces the equipment damage rate, saves construction and maintenance costs, speeds up the construction process while ensuring the accuracy of drilling, and ensures that the working environment is in a better state.

[0007] The present application provides a top-cutting pressure-relieving directional drilling tool for mining machinery, comprising an adjusting arm mounted on a rotary drilling machine, a power head rotating along the adjusting arm, a drill rod mounted on the power head, and a directional drilling tool connected to the end of the drill rod;

[0008] The directional drilling tool comprises: a directional drill barrel connected to the top of the drill rod, and a hole-reaming drill barrel connected to the drill rod and located below the directional drill barrel; wherein a reinforcing guide barrel is connected between the directional drill barrel and the hole-reaming drill barrel, a hot-roll spring surrounding the upper part of the drill rod is arranged inside the reinforcing guide barrel along the height direction, the hot-roll spring and the reinforcing guide barrel have the same first end and are fixedly connected to the directional drill barrel, and the hot-roll spring and the reinforcing guide barrel have the same second end and are rotatably connected to the hole-reaming drill barrel through a double-row roller bearing;

[0009] The directional drill tube and the reaming drill tube are both tapered drill tubes, and the diameter of the directional drill tube is smaller than the diameter of the reaming drill tube. The directional drill tube and the reaming drill tube are both provided with a plurality of discharge holes along the circumferential direction.

[0010] The directional drilling tool also includes a drilling plugging guide device; the drilling plugging guide device includes: a positioning block slidably mounted on the drill rod, and a plugging guide plate connected to the positioning block; a first side of the plugging guide plate is hingedly connected to the positioning block, a second side of the plugging guide plate is connected to the positioning block via a tension spring, and a telescopic rod mechanism is mounted on the top end of the adjusting arm for pressing the plugging guide plate to be in a first setting state and a second setting state;

[0011] The positioning block is provided with an inclined hole adapted to the inclined travel angle of the drill rod, and the inner wall of the inclined hole is circumferentially provided with multiple rows of universal balls; the blocking guide plate is connected to the drill rod through a spherical shaft sleeve;

[0012] When the telescopic rod mechanism drives the blocking guide plate to be in the first setting state, the blocking guide plate is horizontally blocked at the bottom of the drill hole, and the internal drilling debris of the drill hole is retained inside the drill hole and surrounds the drill rod for friction positioning and guiding;

[0013] When the telescopic rod mechanism drives the blocking guide plate to be located in the second setting state, the second side of the blocking guide plate is tilted downward toward the end of the rotary drilling rig.

[0014] In this application, by adopting the above-mentioned strengthening guide tube connected between the directional drill tube and the expansion drill tube, the hot coil spring can effectively offset the torsional deflection generated during drilling, protect the long-term operation of the equipment, and save the operation and maintenance costs during the construction process. At the same time, a blocking guide plate is used to retain the drill cuttings in the borehole to surround the drill rod for guiding protection, while providing an effective fulcrum, the slope of the borehole is reduced to an appropriate range; and, during the drilling process, the drill cuttings are retained, the floating dust can be actually settled, and the drill cuttings are diverted from a low position to the front end of the rotary drill by diversion, ensuring the safe operation of the equipment, less harm to the health of construction personnel, and less floating dust generated by falling, ensuring that the construction environment is within the green construction standard range.

[0015] In a specific possible implementation, a crawler travel mechanism is provided at the bottom of the rotary drilling machine, and a hydraulic telescopic rod for adjusting the tilt angle of the adjustment arm is installed on the rotary drilling machine, and the hydraulic telescopic rod is connected to the hydraulic system of the rotary drilling machine to cope with different construction conditions.

[0016] In a specific implementation method, the front and rear ends of the rotary drilling machine are equipped with hydraulic support legs. Leveling during drilling construction.

[0017] In a specific possible implementation scheme, the top end of the drill rod is connected to the drill bit square sleeve of the directional drill barrel through a cross-staggered first connecting pin assembly to ensure connection stability.

[0018] In a specific implementation method, an L-shaped connecting plate is arranged on the drill bit square sleeve, and the L-shaped connecting plate is connected to the top of the hot coil spring through a U-shaped clamping ring, so as to realize double connection and enhance stable connection.

[0019] In a specific possible implementation method, a positioning hole is provided at the top of the reaming drill tube to match the reinforcing guide tube, so as to enhance the stability of the connecting guide.

[0020] In a specific possible implementation scheme, the drill rod is connected to the reaming drill barrel through a second cross-staggered connecting pin assembly to ensure the stability of synchronous operation with the guide drill barrel.

[0021] In a specific implementation scheme, the double-row roller bearing is fixedly mounted on the bottom of the reaming drill tube, and the bottom ends of the reinforcing guide tube and the hot coil spring are fixedly connected to the outer sleeve of the double-row roller bearing to offset the vibration caused by the bending radius and ensure the safe operation of the equipment.

[0022] In a specific embodiment, the inclined hole has an inclination angle of 15°. The matching improves the hole inclination control effect.

[0023] In a specific possible implementation scheme, a plurality of first long discharge holes are arranged in the circumference of the lower portion of the reaming drill tube, and a plurality of second long discharge holes are arranged in the circumference of the lower portion of the directional drill tube;

[0024] When the telescopic rod mechanism drives the plugging guide plate to be in the first setting state, the drill cuttings in the directional drill barrel enter the inside of the reaming drill barrel through the multiple second elongated discharge holes, and then enter the inside of the borehole through the multiple first elongated discharge holes, and the bottom of the borehole is blocked by the plugging guide plate and at least 1 / 3 of the drill cuttings are retained along the drilling depth. The drill cuttings retention provides a fulcrum to control the hole inclination deviation rate within a reliable range. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the structure of a top-cutting and pressure-relieving directional drilling tool for mining machinery provided in an embodiment of the present application;

[0026] Figure 2 A schematic diagram of the working state of a top-cutting and pressure-relieving directional drilling tool for mining machinery provided in an embodiment of the present application;

[0027] Figure 3 A cross-sectional view of a positioning block provided in an embodiment of the present application;

[0028] Figure 4 A schematic diagram of the structure of the blocking guide plate provided in an embodiment of the present application;

[0029] Figure 5 A schematic diagram of the structure of the reinforced guide cylinder provided in an embodiment of the present application;

[0030] Figure 6 A structural schematic diagram of a reaming drill barrel is provided for an embodiment of the present application.

[0031] Figure Number:

[0032] Drill hole-10, drill residue-11;

[0033] Rotary drilling machine-100, crawler travel mechanism-110, hydraulic support leg-120, adjustment arm-130, hydraulic telescopic rod-140, hydraulic system-150, power head-160;

[0034] Drill rod - 200;

[0035] Telescopic rod mechanism-300;

[0036] Positioning block 400, tension spring 410, blocking guide plate 420, spherical shaft 421, inclined hole 430, universal ball bearing 440, rotating shaft 450;

[0037] Expansion drill tube-500, first long strip discharge hole-510, positioning hole 520;

[0038] Directional drill barrel-600, second long discharge hole-610;

[0039] Strengthened guide cylinder-700, hot rolled spring-710, double row roller bearing-720. DETAILED DESCRIPTION

[0040] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings.

[0041] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in one or more embodiments of this specification should be understood by people with ordinary skills in the field to which this disclosure belongs. The "first", "second" and similar words used in one or more embodiments of this specification do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0042] In order to facilitate understanding of the top-cutting and pressure-relieving directional drilling tools for mining machinery provided in the embodiments of the present application, its application scenario is first explained. The purpose of mining along the empty lanes is to recover the protective coal pillars left in the traditional mining method. The green coal mining process of leaving the lanes of the previous section for the next section can maximize the recovery of coal resources and avoid coal losses caused by leaving coal pillars. An average of 9.45 tons of coal is mined per meter, saving coal resources and avoiding waste. One less lane can be excavated, saving costs of at least 3,500 yuan per meter. When mining the next section, in order to prevent the deformation of the roof, it is necessary to cut the top of the empty lanes to relieve pressure. Different cutting angles have a significant effect on the stress distribution of the coal pillars and the deformation of the lanes. The choice of cutting angle is directly related to the pressure relief effect and the stability of the lane structure. For example, numerical simulation analysis shows that when the top cutting angle (relative to the horizontal plane) in the aquifer tunnel is between 85° and 60°, the angle stress of the coal pillar shows a "hump" trend, especially at angles of 55° and 50°, the angle stress at the peak point of the coal pillar stress at 3 m is less than the angle stress at the peak point at 7 m, which indicates that the appropriate top cutting angle can effectively reduce the surrounding rock stress and meet the needs of normal mining of the working face. Under the condition of composite roof, the optimal top cutting height is 7 meters, and the optimal top cutting angle relative to the vertical direction of the horizontal plane is 15°. After using this angle for top cutting and pressure relief, the control effect of the tunnel is significant, and the displacement of the roof and bottom plates and the displacement of the roadway are kept in a stable state, laying the foundation for coal-saving mining along the goaf. The top cutting height and the optimal top cutting angle are achieved by drilling the top cutting pressure relief borehole. The hole depth and drilling angle of the borehole on the roof are the final top cutting height and top cutting angle. However, the actual drilling direction often produces inconsistent deflection changes with the theoretical design direction. If the deflection of the borehole is very small, the impact is not great; if the deflection develops seriously, it will not only have an adverse effect on the drilling quality and drilling efficiency, but also seriously affect the optimal cutting height and optimal cutting angle of the cutting top pressure relief, making the tunnel roof unstable, increasing the tunnel support cost, not only not conducive to saving mining, but also poses a safety hazard. Therefore, it is necessary to master a series of technical issues from the occurrence to the treatment of the hole deflection, so as to control the hole deflection within the allowable deviation value required by the regulations in the deep hole. In addition, in the existing small-angle inclined drilling equipment, during the gradual drilling process, the drill cuttings fall along with the trend, and the drill cuttings fall directly onto the rotary machine, causing damage to the health of the on-site construction personnel and the rotary drilling equipment. At the same time, as the drilling depth continues to increase, the floating amount of the fallen drill cuttings is large, causing great pollution to the construction scene, which does not meet the requirements of green construction standards. In view of this, the top-cutting and pressure-relieving directional drilling tools used in mining machinery in this application reduce the equipment damage rate, save construction and maintenance costs, speed up the construction process while ensuring the accuracy of drilling, and at the same time ensure that the working environment is in a better state.

[0043] refer to Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of a top-cutting pressure-relieving directional drilling tool used in mining machinery. Figure 2 The working state diagram of the directional drilling tool for top cutting and pressure relief applied to mining machinery. The directional drilling tool for top cutting and pressure relief applied to mining machinery provided in the embodiment of the present application comprises: an adjustment arm 130 mounted on the rotary excavator 100, a power head 160 rotating and traveling along the adjustment arm 130, a drill rod 200 mounted on the power head 160, and a directional drilling tool connected to the end of the drill rod 200; the rotary excavator 100 in the present application adopts a crawler type rotary excavator 100, which can be used for stable walking in the tunnel. The bottom of the rotary excavator 100 is provided with a crawler travel mechanism 110, and the rotary excavator 100 is equipped with a hydraulic telescopic rod 140 for adjusting the inclination angle of the adjustment arm 130, and the hydraulic telescopic rod 140 is connected to the hydraulic system 150 of the rotary excavator 100. It can cope with different construction conditions. The power head 160 is mounted on the adjustment arm 130 to rotate and drive the multi-section drill rod 200 to perform drilling operations, which is a commonly used technical means in the prior art and will not be described in detail here. At the same time, both front and rear ends of the rotary drilling machine 100 are equipped with hydraulic support legs 120. During the construction of the drilling hole 10, the leveling process is performed, and after the leveling process is completed, the accuracy of the inclined drilling angle is guaranteed.

[0044] Depend on Figure 2 It can be seen that the top-cutting and pressure-relieving directional drilling tool in the present application is mainly used in the field of mining machinery. In a specific embodiment of the present application, the directional drilling tool drills upward at an inclination of 15°, and the depth of the borehole 10 is 7m. While ensuring that the slope of the inclined borehole 10 does not exceed 1.5%, the present application uses a directional drill barrel 600 for pre-drilling, and the expansion drill barrel 500 continues to drill along the positioning of the directional drill barrel 600 during the continuous drilling process. The hole inclination control rate is within the standard range during the overall drilling process, and the drill cuttings 11 in the borehole 10 are greatly utilized to achieve auxiliary support, thereby avoiding the change in the deflection of the drill rod 200 due to the long drilling process.

[0045] Specifically, the directional drilling tool includes: a directional drill barrel 600 connected to the top of the drill rod 200, and a reaming drill barrel 510 connected to the drill rod 200 and located below the directional drill barrel 600; wherein a reinforcing guide barrel 700 is connected between the directional drill barrel 600 and the reaming drill barrel 510, and a hot coil spring 710 surrounding the upper part of the drill rod 200 is arranged inside the reinforcing guide barrel 700 along the height direction, the hot coil spring 710 and the reinforcing guide barrel 700 have the same first end fixedly connected to the directional drill barrel 600, and the hot coil spring 710 and the reinforcing guide barrel 700 have the same second end rotatably connected to the reaming drill barrel 510 via a double-row roller bearing 720; Figure 5 and Figure 6As shown in the figure, the reinforced guide cylinder 700 is used to enhance the connection stability between the directional drill barrel 600 and the reaming drill barrel 510. The end of the drill rod 200 passes through the reinforced guide cylinder 700 and is connected to the directional drill barrel, and the hot coil spring 710 is sleeved on the periphery of the drill rod 200. The top of the drill rod 200 is connected to the drill bit square sleeve of the directional drill barrel 600 through a first cross-displaced connecting pin assembly. Ensure the connection stability. The drill bit square sleeve is relatively provided with an L-shaped connecting plate, and the L-shaped connecting plate is connected to the top of the hot coil spring 710 through a U-shaped clamping ring. A double connection is achieved to enhance the stable connection. The top of the reaming drill barrel 510 is provided with a positioning hole 520 that matches the reinforced guide cylinder 700. Enhance the stability of the connection guide. The drill rod 200 is connected to the reaming drill barrel 510 through a second cross-displaced connecting pin assembly. Ensure the stability of synchronous operation with the directional drill barrel. The double-row roller bearing 720 is fixedly assembled at the bottom of the reaming drill tube 500, and the bottom ends of the reinforcing guide tube 700 and the hot coil spring 710 are fixedly connected to the outer sleeve of the double-row roller bearing 720. The vibration generated when the bending radius is generated is offset to ensure the safe operation of the equipment.

[0046] It can be seen from the above structure that when the guide drill barrel with a smaller diameter drills along the route of the borehole 10, the reaming drill barrel 510 rotates synchronously, and when the guide drill barrel of the front end of the borehole 10 has a large change in the curvature due to the end of the drill rod 200, the vibration force is absorbed by the hot coil spring 710 to produce torque deformation, which greatly ensures the safety of the equipment and ensures that the environment where the guide drill bit is located is safer when double connection is made. Of course, in other embodiments of the present application, the guide drill barrel can also use a conical alloy drill bit, and when the drilling accuracy of the borehole 10 is higher and the diameter is larger, the tunnel control effect is more stable.

[0047] In order to ensure the drilling effect, the directional drill barrel 600 and the reaming drill barrel 510 are both tapered drill barrels, and the diameter of the directional drill barrel 600 is smaller than that of the reaming drill barrel 510. Both the directional drill barrel 600 and the reaming drill barrel 510 are provided with multiple unloading holes along the circumference; a plurality of first long unloading holes 510 are provided circumferentially at the lower part of the reaming drill barrel 510, and a plurality of second long unloading holes 610 are provided circumferentially at the lower part of the directional drill barrel 600; when the telescopic rod mechanism 300 drives the blocking guide plate 420 to be in the first setting state, the drill cuttings 11 inside the directional drill barrel 600 enter the inside of the reaming drill barrel 510 through the plurality of second long unloading holes 610, and then the drill cuttings 11 inside the reaming drill barrel 510 enter the inside of the borehole 10 through the plurality of first long unloading holes 510, and the bottom of the borehole 10 is blocked by the blocking guide plate 420 and at least 1 / 3 of the drill cuttings 11 are retained along the drilling depth. The drill cuttings 11 are retained to provide a fulcrum and the hole inclination deviation rate is controlled within a reliable range.

[0048] In addition, combined Figure 3 and Figure 4As shown in the figure, the directional drilling tool also includes a drilling hole 10 plugging guide device; the drilling hole 10 plugging guide device includes: a positioning block 400 slidably assembled on the drill rod 200, and a plugging guide plate 420 connected to the positioning block 400; the first side of the plugging guide plate 420 is hingedly connected to the positioning block 400 through a rotating shaft 450, and the second side of the plugging guide plate 420 is connected to the positioning block 400 through a tension spring 410, and the top end of the adjusting arm 130 is equipped with a telescopic rod mechanism 300 for pressing the plugging guide plate 420 to be located in the first setting state and the second setting state; in order to adapt to different angle changes, the telescopic rod mechanism 300 is hingedly connected to the top end of the adjusting arm 130. The positioning block 400 is provided with an inclined hole 430 adapted to the inclined travel angle of the drill rod 200. A plurality of rows of universal balls 440 are arranged on the inner wall of the inclined hole 430 in the circumferential direction, thereby realizing rolling contact with the drill rod 200. When the positioning block 400 remains in position, the drill rod 200 rotates and travels through the inclined hole 430. The blocking guide plate 420 is connected to the drill rod 200 through a spherical shaft 421. When the blocking guide plate 420 changes to different states, the spherical shaft 421 rotates accordingly to ensure the stability of the shape change. Figure 2 As shown in the figure, when the telescopic rod mechanism 300 drives the blocking guide plate 420 to be in the first setting state, the blocking guide plate 420 is horizontally blocked at the bottom of the borehole 10, and the internal drill cuttings 11 of the borehole 10 remain inside the borehole 10 and surround the drill rod 200 for friction positioning and guiding; the first setting state is the drilling guide working state, which increases the drilling distance during the double drilling process of the guide drill barrel and the reaming drill barrel 510 to prevent deflection, and the drill cuttings 11 accumulated and precipitated at the bottom outlet of the borehole 10 surround and guide the drill rod 200, providing a reliable fulcrum to offset the resulting deflection.

[0049] like Figure 1 As shown in , when the telescopic rod mechanism 300 drives the plugging guide plate 420 to be in the second setting state, the second side of the plugging guide plate 420 is tilted downward toward the end of the rotary drilling machine 100. The second state is a state in which the drill cuttings 11 are unloaded. In this application, it is mainly used for drilling holes 10 inclined upward. Under the action of gravity, the drill cuttings 11 are guided along the inclined plugging guide plate 420, so that the drill cuttings 11 fall to the front end of the rotary drilling machine, and the lower falling distance makes the floating dust smaller, and the green construction requirements are met through dust reduction treatment in a smaller range. In the gradual drilling process, in order to prevent excessive accumulation of drill cuttings 11 from causing resistance to the rotation of the drill rod 200, the drilling depth is always observed, and the plugging guide plate 420 is opened according to the drilling depth; for example, if the drilling depth is 6m at this time, the drill cuttings 11 are retained more than 2m inside the borehole 10 to provide a friction fulcrum for the drill rod 200.

[0050] In a specific embodiment of the present application, the inclination angle of the inclined hole 430 is 15°. The matching improves the hole inclination control effect. Of course, it should be understood that when the directional drilling tool in the present application is applied to other technologies of mining machinery, such as directional drilling survey, directional drilling anchoring and other technologies, the inclination angle of the inclined hole 430 can be replaced and adjusted accordingly, and it is more comprehensive in the mining field.

[0051] In the present application, by adopting the above-mentioned reinforced guide tube 700 connected between the directional drill tube 600 and the expansion drill tube 510, the hot coil spring 710 can effectively offset the torsional deflection generated during drilling, protect the long-term operation of the equipment, and save the operation and maintenance costs during the construction process. At the same time, the plugging guide plate 420 is used to retain the drill slag 11 in the borehole 10 to surround the drill rod 200 for guiding protection, while providing an effective fulcrum, the slope of the borehole 10 is reduced to a suitable range; and, during the drilling process, the drill slag 11 is retained, the floating dust can be actually settled, and the drill slag 11 is diverted from a low position to the front end of the rotary drill by diversion, ensuring the safe operation of the equipment, less harm to the health of construction personnel, and less floating dust generated by falling, ensuring that the construction environment is within the green construction standard range.

[0052] A person of ordinary skill in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present disclosure (including the claims) is limited to these examples. In line with the concept of the present disclosure, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments of the present specification as above, which are not provided in detail for the sake of simplicity.

[0053] In addition, to simplify the description and discussion, and in order not to obscure one or more embodiments of the present specification, known power / ground connections to integrated circuits and other components may or may not be shown in the provided figures. In addition, devices may be shown in the form of block diagrams to avoid obscuring one or more embodiments of the present specification, and this also takes into account the fact that the details of the implementation of these block diagram devices are highly dependent on the platform on which one or more embodiments of the present specification will be implemented (i.e., these details should be fully within the scope of understanding of those skilled in the art). Where specific details are set forth to describe exemplary embodiments of the present disclosure, it is apparent to those skilled in the art that one or more embodiments of the present specification may be implemented without these specific details or with variations in these specific details. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0054] One or more embodiments of this specification are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of this specification should be included in the scope of protection of this disclosure.

[0055] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A directional drilling tool for top cutting and pressure relief used in mining machinery, comprising an adjusting arm mounted on a rotary drilling machine, a power head rotating along the adjusting arm, a drill rod mounted on the power head, and a directional drilling tool connected to the end of the drill rod; characterized in that: The directional drilling tool comprises: a directional drill barrel connected to the top of the drill rod, and a hole-reaming drill barrel connected to the drill rod and located below the directional drill barrel; wherein a reinforcing guide barrel is connected between the directional drill barrel and the hole-reaming drill barrel, a hot-roll spring surrounding the upper part of the drill rod is arranged inside the reinforcing guide barrel along the height direction, the first end of the hot-roll spring and the reinforcing guide barrel being the same is fixedly connected to the directional drill barrel, and the second end of the hot-roll spring and the reinforcing guide barrel being the same is rotatably connected to the hole-reaming drill barrel through a double-row roller bearing; Both the directional drill tube and the reaming drill tube are tapered drill tubes, and the diameter of the directional drill tube is smaller than the diameter of the reaming drill tube. Both the directional drill tube and the reaming drill tube are provided with a plurality of discharge holes along the circumferential direction. The directional drilling tool also includes a drilling plugging guide device; the drilling plugging guide device includes: a positioning block slidably mounted on the drill rod, and a plugging guide plate connected to the positioning block; a first side of the plugging guide plate is hingedly connected to the positioning block, a second side of the plugging guide plate is connected to the positioning block via a tension spring, and a telescopic rod mechanism for pressing the plugging guide plate to be in a first setting state and a second setting state is mounted on the top end of the adjusting arm; The positioning block is provided with an inclined hole adapted to the inclined travel angle of the drill rod, and a plurality of rows of universal balls are arranged on the inner wall of the inclined hole in the circumferential direction; the blocking guide plate is connected to the drill rod through a spherical shaft set; When the telescopic rod mechanism drives the blocking guide plate to be in the first setting state, the blocking guide plate is horizontally blocked at the bottom of the drill hole, and the internal drilling debris of the drill hole is retained inside the drill hole and surrounds the drill rod for friction positioning and guiding; When the telescopic rod mechanism drives the blocking guide plate to be in the second setting state, the second side of the blocking guide plate is tilted downward toward the end of the rotary drilling rig.

2. The top cutting and pressure relief directional drilling tool for mining machinery according to claim 1 is characterized in that: A crawler travel mechanism is arranged at the bottom of the rotary drilling machine, and a hydraulic telescopic rod for adjusting the inclination angle of the adjustment arm is mounted on the rotary drilling machine, and the hydraulic telescopic rod is connected to the hydraulic system of the rotary drilling machine.

3. The top cutting and pressure relief directional drilling tool for mining machinery according to claim 2 is characterized in that: The front and rear ends of the rotary drilling rig are equipped with hydraulic support legs.

4. The top cutting and pressure relief directional drilling tool for mining machinery according to claim 3 is characterized in that: The top end of the drill rod is connected to the drill bit square sleeve of the directional drill barrel through a first connecting pin assembly that is cross-staggered and crossed.

5. The top cutting and pressure relief directional drilling tool for mining machinery according to claim 4, characterized in that: An L-shaped connecting plate is relatively arranged on the drill bit square sleeve, and the L-shaped connecting plate is connected to the top end of the hot-rolled spring through a U-shaped clamping ring.

6. The top cutting and pressure relief directional drilling tool for mining machinery according to claim 1, characterized in that: The top of the reaming drill tube is provided with a positioning hole matched with the reinforcing guide tube.

7. The top cutting and pressure relief directional drilling tool for mining machinery according to claim 6, characterized in that: The drill rod is connected to the reaming drill tube through a second connecting pin assembly that is cross-staggered and crossed.

8. The top cutting and pressure relief directional drilling tool for mining machinery according to claim 7, characterized in that: The double-row roller bearing is fixedly assembled at the bottom of the reaming drill tube, and the bottom ends of the reinforcing guide tube and the hot-rolled spring are fixedly connected to the outer sleeve of the double-row roller bearing.

9. The top cutting and pressure relief directional drilling tool for mining machinery according to any one of claims 1 to 8, characterized in that: The inclination angle of the inclined hole is 15°.

10. The top cutting and pressure relief directional drilling tool for mining machinery according to any one of claims 1 to 8, characterized in that: A plurality of first long discharge holes are arranged in the circumference of the lower part of the reaming drill tube, and a plurality of second long discharge holes are arranged in the circumference of the lower part of the directional drill tube; When the telescopic rod mechanism drives the sealing guide plate to be in the first setting state, the drill cuttings inside the directional drill barrel enter the interior of the reaming drill barrel through the multiple second long unloading holes, and then the drill cuttings inside the reaming drill barrel enter the interior of the borehole through the multiple first long unloading holes, and the bottom of the borehole is sealed by the sealing guide plate and at least 1 / 3 of the drill cuttings are retained along the drilling depth.

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