Raise boring machine attached to inclined ore body and drilling method

Abstract

The invention relates to the technical field of drilling machines, in particular to a raise boring machine attached to an inclined ore body and a drilling method. According to the technical scheme, the righting mechanism comprises two righting rings which are symmetrically arranged, a righting shaft making contact with a drill rod is rotationally connected between the two righting rings, the inner walls of the righting rings are rotationally connected with a rotating shaft, and a transmission part is arranged between the righting shaft and the rotating shaft. When the drill rod is bent, the friction force between the drill rod and the guide hole is increased, the torque transmission efficiency is reduced, the rotating speed of the drill rod is reduced, at the moment, the rotating centrifugal force borne by the centrifugal block is small, and the spiral spring pulls the centrifugal block to move; a centrifugal block pushes hydraulic oil in a first hydraulic injector into a hydraulic telescopic rod through a sliding ring and a sliding plate by means of a connecting rod, so that a hydraulic recycling mechanism stretches out, the pressure between the hydraulic recycling mechanism and the hole wall is increased, the hole wall generates reverse supporting force on the hydraulic recycling mechanism and a centralizing ring, and the bending trend of a drill rod is counteracted.

Description

Technical Field

[0001] The present invention relates to the technical field of drilling rigs, and in particular to a raise boring machine and a drilling method for conforming to an inclined ore body. Background Art

[0002] A raise boring machine is a special mechanical equipment used for excavating vertical shafts (vertical or nearly vertical shafts) in underground projects such as mines and tunnels, and is mainly used for constructing ventilation shafts, drainage shafts, material hoisting shafts, etc. Compared with traditional manual excavation or forward drilling methods, the raise boring machine has the advantages of high efficiency, good safety, and high well construction quality, and is especially suitable for shaft construction under complex geological conditions such as deep holes and hard rocks.

[0003] In the patent document with the publication number CN104989272B, an upward raise boring process is proposed, which realizes shaft drilling in the formation above the existing tunnel in the existing tunnel, without the need to excavate a new tunnel to meet the existing raise boring process, thereby reducing the cost of shaft excavation and the working hours required for such shaft excavation, thus accelerating the project progress and saving a large amount of time for subsequent construction. During the shaft drilling process, no drilling fluid or a small amount of drilling fluid is required, and the drilling fluid is used to reduce the temperature of the drill bit, improve the service life of the drill bit and the shaft drilling speed, and ensure that the drill bit can perform continuous construction operations.

[0004] However, when cutting an inclined raise in an inclined ore body, when the drill pipe is inclined, an additional bending moment will be generated by the axial force, resulting in the drill pipe bearing bending stress, local bending deformation of the drill pipe, increased wear, and reduced torque transmission efficiency. Summary of the Invention

[0005] The object of the present invention is to solve the problem that the drill pipe will be bent and deformed and the wear will be increased when drilling an inclined ore body in the background art, and to propose a raise boring machine and a drilling method for conforming to an inclined ore body.

[0006] On the one hand, the present invention proposes a raise boring machine for conforming to an inclined ore body, including a support base, on the top of the support base, two symmetrically arranged hydraulic lifting platforms are fixedly installed, between the two hydraulic lifting platforms, a drilling rig driving device is fixedly installed, and the bottom of the drilling rig driving device is rotatably connected with a drill pipe;

[0007] A straightening mechanism includes two symmetrically arranged straightening rings, a straightening shaft in contact with the drill pipe being rotatably connected between the two straightening rings, a rotating shaft being rotatably connected to the inner wall of the straightening ring, a transmission member being provided between the straightening shaft and the rotating shaft, a slip ring being slidably connected to the middle portion of the rotating shaft, a centrifugal member connected to the slip ring being provided on the outer wall of the rotating shaft, a slide being rotatably connected to the top of the slip ring, a first hydraulic injector being fixedly mounted between the top of the slide and the straightening ring, a hydraulic telescopic rod being fixedly mounted on the inner wall of the straightening ring, and a first hydraulic pipe being fixedly connected between the first hydraulic injector and the hydraulic telescopic rod;

[0008] The inner wall of the straightening ring is slidably connected to a hydraulic recovery mechanism arranged at the end of the hydraulic telescopic rod.

[0009] Optionally, the centrifugal member includes a guide rod, the end of which is fixedly mounted on the outer wall of the rotating shaft. A plurality of guide rods are provided and are distributed in a circular shape with equal angles around the rotating shaft. A centrifugal block is slidably connected to the guide rod, and a coil spring is elastically connected between the centrifugal block and the rotating shaft. The top of the centrifugal block is hinged to the slip ring through a connecting rod.

[0010] Optionally, the transmission member includes a large gear, which rotates inside the straightening ring, and the end of the straightening shaft is rotatably connected to the large gear. The inside of the straightening ring is rotatably connected to a small gear that meshes with the large gear, and the small gear is fixedly mounted on the end of the rotating shaft. The diameter of the straightening shaft is smaller than the diameter of the drill pipe, and the diameter of the small gear is smaller than that of the straightening shaft.

[0011] Optionally, the hydraulic recovery mechanism includes a first arc plate, the side of the first arc plate is fixedly connected to the hydraulic telescopic rod, a support spring is elastically installed on the side of the first arc plate away from the hydraulic telescopic rod, the other end of the support spring is fixedly installed with a second arc plate, a second hydraulic injector is fixedly installed on the side of the first arc plate, a connecting rod fixedly connected to the second hydraulic injector is fixedly installed on the side of the second arc plate, and the second hydraulic injector is connected to the hydraulic telescopic rod through a second hydraulic pipe.

[0012] Optionally, the second arc plate contacts the hole wall, the support spring adopts a spring with a high elastic coefficient, the second arc plate is slidingly connected to the straightening ring, and four hydraulic recovery mechanisms are provided and distributed in a circular shape at equal angles on the inner wall of the straightening ring.

[0013] Optionally, a second hydraulic injector is fixedly installed on the first arc plate away from the hydraulic telescopic rod, the second hydraulic injector is located on the moving path of the second arc plate, and the connecting rod is slidably connected to the first arc plate.

[0014] Optionally, a lubrication mechanism is provided on the top of the skateboard. The lubrication mechanism includes a lubricating oil injection member. Two ends of the lubricating oil injection member are fixedly connected to the centering ring and the skateboard respectively. Lubricating oil is stored inside the lubricating oil injection member. A spray outlet is formed at the bottom of the centering ring. The lubricating oil injection member is communicated with the spray outlet through a pipeline. The outlet of the spray outlet faces the drill pipe.

[0015] Optionally, a plurality of limiting rods are fixedly installed inside the centering ring. They are grouped in pairs. The same skateboard is slidably connected to two limiting rods in a group. A limiting plate is fixedly installed at the bottom of the limiting rod.

[0016] Optionally, a hydraulic support rod is rotatably connected between the back of the drilling rig driving device and the support base. The hydraulic support rod is inclined. The support base adopts a rotatable two-section design. A cylindrical opening for guiding the drill pipe is formed on the support base.

[0017] On the other hand, the present invention proposes a drilling method for a raise boring machine for fitting an inclined ore body, which is applied to the above-mentioned raise boring machine for fitting an inclined ore body. The steps are as follows:

[0018] S1. Drill a pilot hole with a diameter of 250 mm and drill a small-diameter guiding hole from top to bottom. Control the drilling deviation slope within 1 and achieve the breakthrough point. Ensure the slag discharge, water volume and water pressure, and drain the rock slag in the hole to prevent blockage of the hole. After the pilot hole is completed, the straightness should be checked. For a pilot hole with a straightness exceeding 2%, it should be judged as a waste hole and the reaming operation cannot continue, otherwise it may cause damage to the drill tool.

[0019] S2. As the drilling progresses, when the drill pipe bends, the friction between the drill pipe and the pilot hole increases at this time, the torque transmission efficiency decreases, the centrifugal force received by the centrifugal block is small, the centrifugal block is pulled by the spiral spring, the centrifugal block pushes up the slip ring by using the connecting rod, and the slip ring and the skateboard push the hydraulic oil in the first hydraulic injector into the hydraulic telescopic rod, so that the hydraulic recovery mechanism extends, increasing the pressure between the hydraulic recovery mechanism and the hole wall. The hole wall generates a reverse supporting force on the hydraulic recovery mechanism and the centering ring, offsetting the tendency of the drill pipe to tilt and reducing the bending deformation of the drill pipe and the friction with the hole wall.

[0020] S3. After the first arc plate is pushed out by the hydraulic telescopic rod, the second arc plate contacts the hole wall. When the formation where the hole wall is located is soft, the elastic force of the support spring supports on the second arc plate. Due to the elasticity of the support spring, the soft hole wall cannot press the second arc plate towards the first arc plate. At this time, there is a space for accommodating hydraulic oil in the second hydraulic injector, and the hydraulic oil in the hydraulic telescopic rod enters the second hydraulic injector, avoiding the hydraulic telescopic rod from extending and forcibly squeezing the hole wall to cause peeling or collapse.

[0021] S4. When the skateboard slides upward, it squeezes the lubricating oil injector to extrude the lubricating oil inside from the spray outlet, so as to reduce the friction between the drill pipe and the hole wall, maintain the rotation speed of the drill pipe, and avoid misjudgment by the centralizing mechanism;

[0022] S5. After the raise-bore is drilled through, use a rod wrench to remove the cone bit and the short joint rod on the lower working face. Transport the reaming cutter head to the lower working face, connect the cutter head and the drill pipe with a lifting tool. Apply special drill tool thread grease evenly on the male thread end of the pull rod. Contact the operator on the upper working face through timely communication. Slowly lift the drill pipe. After the cutter head is lifted upright, remove the lifting tool. Instruct the operator to connect the drill pipe threads and tighten them.

[0023] Compared with the prior art, the present invention has the following beneficial technical effects:

[0024] When the drill pipe in the present invention is bent, the friction between the drill pipe and the pilot hole increases, the torque transmission efficiency decreases, and the rotation speed of the drill pipe will decrease. At this time, the centrifugal force received by the centrifugal block is small, the spiral spring pulls the centrifugal block to move, and the centrifugal block uses the connecting rod to push the hydraulic oil in the first hydraulic injector into the hydraulic telescopic rod through the slip ring and the skateboard, so that the hydraulic recovery mechanism extends, increasing the pressure between the hydraulic recovery mechanism and the hole wall. The hole wall generates a reverse supporting force on the hydraulic recovery mechanism and the centralizing ring, offsetting the bending trend of the drill pipe, reducing the bending deformation of the drill pipe and the friction with the hole wall.

[0025] Further, when the formation where the hole wall is located is soft, the elastic force of the support spring supports on the second arc plate. Due to the elasticity of the support spring, the soft hole wall cannot press the second arc plate towards the first arc plate. At this time, there is a space in the second hydraulic injector to accommodate the hydraulic oil, and part of the hydraulic oil in the hydraulic telescopic rod enters the second hydraulic injector, so that the hydraulic telescopic rod cannot extend, avoiding the second arc plate from forcibly supporting on the hole wall and causing the soft hole wall to collapse.

[0026] Furthermore, when the skateboard slides upward to squeeze the lubricating oil injector to extrude the lubricating oil inside from the spray outlet, the lubricating oil flows to the space between the drill pipe and the hole wall due to gravity, so as to reduce the friction between the drill pipe and the hole wall, maintain the rotation speed of the drill pipe, and avoid misjudgment by the centralizing mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The overall structural schematic diagram of the present invention is given;

[0028] Figure 2 The structural schematic diagram of the drill pipe of the present invention is given;

[0029] Figure 3 The sectional schematic diagram of the centralizing ring structure of the present invention is given;

[0030] Figure 4 For Figure 3Schematic enlarged view of the large gear structure of part A;

[0031] Figure 5 Schematic diagram of the skateboard structure of the present invention;

[0032] Figure 6 Top view schematic diagram of the first arc plate structure of the present invention;

[0033] Figure 7 Bottom view schematic diagram of the centering ring structure of the present invention.

[0034] Reference numerals: 1, support base; 2, hydraulic lifting platform; 3, drill drive device; 4, hydraulic support rod; 5, drill pipe; 6, centering mechanism; 61, centering ring; 62, centering shaft; 63, large gear; 64, small gear; 65, rotating shaft; 66, centrifugal block; 67, guide rod; 68, helical spring; 69, slip ring; 610, skateboard; 611, first hydraulic injector; 612, first hydraulic pipe; 613, hydraulic telescopic rod; 7, hydraulic recovery mechanism; 71, first arc plate; 72, support spring; 73, second arc plate; 74, connecting rod; 75, second hydraulic injector; 76, second hydraulic pipe; 8, lubrication mechanism; 81, limiting rod; 82, limiting plate; 83, lubricating oil injection part; 84, spray outlet. Detailed implementation manners

[0035] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments.

[0036] Generally, the components of the embodiments of the present invention described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention.

[0037] Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0039] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0040] Embodiment 1

[0041] This embodiment provides a raise boring machine for fitting an inclined ore body, as Figure 1 shown, which includes a support base 1. At the top of the support base 1, two symmetrically arranged hydraulic lifting platforms 2 are fixedly installed. Between the two hydraulic lifting platforms 2, a drilling machine driving device 3 is fixedly installed. At the bottom of the drilling machine driving device 3, a drill pipe 5 is rotatably connected. Between the back of the drilling machine driving device 3 and the support base 1, a hydraulic support rod 4 is rotatably connected. The hydraulic support rod 4 adjusts the inclination angle of the drilling machine driving device 3 and the drill pipe 5 to fit the inclined ore body. The support base 1 adopts a rotatable two-section design, and a cylindrical opening for guiding the drill pipe 5 is provided on the support base 1.

[0042] As Figure 2 shown, a straightening mechanism 6 is sleeved on the outer wall of the drill pipe 5, which includes two symmetrically arranged straightening rings 61. Between the two straightening rings 61, a straightening shaft 62 in contact with the drill pipe 5 is rotatably connected. Inside the inner wall of the straightening ring 61, a rotating shaft 65 is rotatably connected. The drill pipe 5 is supported and straightened by the straightening rings 61 and the straightening shaft 62 to prevent the drill pipe 5 from bending.

[0043] As Figure 3 and Figure 4 shown, a transmission member is provided between the straightening shaft 62 and the rotating shaft 65. The transmission member includes a large gear 63. The large gear 63 rotates inside the straightening ring 61. The end of the straightening shaft 62 is rotatably connected to the large gear 63. Inside the straightening ring 61, a small gear 64 meshing with the large gear 63 is rotatably connected. The small gear 64 is fixedly installed at the end of the rotating shaft 65. The diameter of the straightening shaft 62 is smaller than the diameter of the drill pipe 5, and the diameter of the small gear 64 is smaller than the diameter of the straightening shaft 62. Through the diameter ratio of the drill pipe 5, the straightening shaft 62, and the small gear 64, when the drill pipe 5 rotates one circle, the small gear 64 rotates several circles.

[0044] As Figure 5As shown in the figure, a slip ring 69 is slidably connected to the middle of the rotating shaft 65. An eccentric member connected to the slip ring 69 is provided on the outer wall of the rotating shaft 65. The eccentric member includes a guide rod 67. The end of the guide rod 67 is fixedly installed on the outer wall of the rotating shaft 65. A plurality of guide rods 67 are provided and are evenly distributed at equal angles around the rotating shaft 65. A centrifugal block 66 is slidably connected to the guide rod 67. A helical spring 68 is elastically connected between the centrifugal block 66 and the rotating shaft 65. The top of the centrifugal block 66 is hinged to the slip ring 69 through a connecting rod. The top of the slip ring 69 is rotatably connected to a slide plate 610. A first hydraulic injector 611 is fixedly installed between the top of the slide plate 610 and the centering ring 61. A hydraulic telescopic rod 613 is fixedly installed on the inner wall of the centering ring 61. A first hydraulic pipe 612 is fixedly connected between the first hydraulic injector 611 and the hydraulic telescopic rod 613. A hydraulic recovery mechanism 7 is slidably connected to the inner wall of the centering ring 61 and is provided at the end of the hydraulic telescopic rod 613.

[0045] As the drilling progresses, when the drill pipe 5 is working normally, the rotation speed of the drill pipe 5 is normal, and the rotation speed of the rotating shaft 65 inside it is normal; when the drill pipe 5 bends, at this time, the friction between the drill pipe 5 and the guide hole increases, the torque transmission efficiency decreases, and the rotation speed of the drill pipe 5 will decrease, so that the rotation speeds of the centering shaft 62, the small gear 64, and the rotating shaft 65 decrease. The centrifugal force received by the centrifugal block 66 is small, and the centrifugal block 66 is pulled by the helical spring 68. The centrifugal block 66 pushes the hydraulic oil in the first hydraulic injector 611 onto the hydraulic telescopic rod 613 by using the connecting rod, so that the hydraulic recovery mechanism 7 extends, increasing the pressure between the hydraulic recovery mechanism 7 and the hole wall. The hole wall generates a reverse supporting force on the hydraulic recovery mechanism 7 and the centering ring 61.

[0046] In this embodiment, when the drill pipe 5 bends, the friction between the drill pipe 5 and the guide hole increases, the torque transmission efficiency decreases, and the rotation speed of the drill pipe 5 will decrease. At this time, the centrifugal force received by the centrifugal block 66 is small, and the helical spring 68 pulls the centrifugal block 66 to move. The centrifugal block 66 uses the connecting rod to push the hydraulic oil in the first hydraulic injector 611 onto the hydraulic telescopic rod 613 by the slip ring 69 and the slide plate 610, so that the hydraulic recovery mechanism 7 extends, increasing the pressure between the hydraulic recovery mechanism 7 and the hole wall. The hole wall generates a reverse supporting force on the hydraulic recovery mechanism 7 and the centering ring 61, offsetting the bending trend of the drill pipe 5 and reducing the bending deformation of the drill pipe 5 and the friction with the hole wall.

[0047] Embodiment 2

[0048] Based on Embodiment 1, this embodiment proposes a raise boring machine that fits an inclined ore body, as Figure 6As shown in the figure, the hydraulic recovery mechanism 7 includes a first arc plate 71. The side of the first arc plate 71 is fixedly connected to the hydraulic telescopic rod 613. A support spring 72 is elastically installed on the side of the first arc plate 71 away from the hydraulic telescopic rod 613. The other end of the support spring 72 is fixedly installed with a second arc plate 73. A second hydraulic injector 75 is fixedly installed on the side of the first arc plate 71. A connecting rod 74 fixedly connected to the second hydraulic injector 75 is fixedly installed on the side of the second arc plate 73. The second hydraulic injector 75 is communicated with the hydraulic telescopic rod 613 through a second hydraulic pipe 76.

[0049] The second arc plate 73 contacts the hole wall. The support spring 72 is a spring with a high elastic coefficient. The second arc plate 73 is slidably connected to the centralizing ring 61. Four hydraulic recovery mechanisms 7 are provided and are evenly distributed at equal angles in a ring shape on the inner wall of the centralizing ring 61.

[0050] After the first arc plate 71 is pushed out by the hydraulic telescopic rod 613, the second arc plate 73 contacts the hole wall. When the formation where the hole wall is located is soft, the elastic force of the support spring 72 supports on the second arc plate 73. Due to the elasticity of the support spring 72, the soft hole wall cannot press the second arc plate 73 towards the first arc plate 71, and the connecting rod 74 does not squeeze the second hydraulic injector 75. At this time, there is a space for accommodating hydraulic oil in the second hydraulic injector 75, and the hydraulic oil in the hydraulic telescopic rod 613 enters the second hydraulic injector 75.

[0051] As Figure 6 shown, a second hydraulic injector 75 is fixedly installed on the first arc plate 71 away from the hydraulic telescopic rod 613. The second hydraulic injector 75 is located on the moving path of the second arc plate 73. The connecting rod 74 is slidably connected to the first arc plate 71. The second hydraulic injector 75 limits the second arc plate 73 to prevent the second arc plate 73 and the first arc plate 71 from clamping the support spring 72 to the limit and causing the support spring 72 to lose its elasticity.

[0052] In this embodiment, when the formation where the hole wall is located is soft, the elastic force of the support spring 72 supports on the second arc plate 73. Due to the elasticity of the support spring 72, the soft hole wall cannot press the second arc plate 73 towards the first arc plate 71. At this time, there is a space for accommodating hydraulic oil in the second hydraulic injector 75, and part of the hydraulic oil in the hydraulic telescopic rod 613 enters the second hydraulic injector 75, so that the hydraulic telescopic rod 613 cannot extend, preventing the second arc plate 73 from forcibly supporting on the hole wall and causing the soft hole wall to collapse.

[0053] Embodiment 3

[0054] Based on the above Embodiment 1 or 2, this embodiment proposes a raise boring machine that fits an inclined ore body, as Figure 5 and Figure 7As shown in the figure, a lubricating mechanism 8 is provided on the top of the skateboard 610. The lubricating mechanism 8 includes a lubricating oil injection part 83. The two ends of the lubricating oil injection part 83 are fixedly connected to the centering ring 61 and the skateboard 610 respectively. Lubricating oil is stored inside the lubricating oil injection part 83. A spray outlet 84 is opened at the bottom of the centering ring 61. The lubricating oil injection part 83 is communicated with the spray outlet 84 through a pipeline, and the outlet of the spray outlet 84 faces the drill pipe 5.

[0055] During the upward movement of the skateboard 610, the skateboard 610 squeezes the lubricating oil injection part 83 to extrude the lubricating oil inside it from the spray outlet 84, so as to reduce the friction between the drill pipe 5 and the hole wall.

[0056] A plurality of limiting rods 81 are fixedly installed inside the centering ring 61. They are grouped in pairs, and the same skateboard 610 is slidably connected to two limiting rods 81 in a group. A limiting plate 82 is fixedly installed at the bottom of the limiting rod 81. The two limiting rods 81 in a group limit the skateboard 610 to prevent the sliding ring 69 from driving the skateboard 610 to rotate, and the limiting plate 82 prevents the skateboard 610 from falling off.

[0057] In this embodiment, the skateboard 610 slides upward to squeeze the lubricating oil injection part 83 to extrude the lubricating oil inside it from the spray outlet 84. The lubricating oil flows between the drill pipe 5 and the hole wall due to gravity, so as to reduce the friction between the drill pipe 5 and the hole wall, maintain the rotation speed of the drill pipe 5, and avoid misjudgment of the centering mechanism 6.

[0058] A drilling method for a raise boring machine that fits an inclined ore body is applied to the above-mentioned raise boring machine that fits an inclined ore body, and its steps are as follows:

[0059] S1. Drill a small-diameter guide hole with a diameter of 250 mm from top to bottom, control the drilling deviation rate within 1 and achieve the breakthrough point, ensure the slag discharge, water volume and water pressure, discharge the rock slag in the hole, prevent hole blockage. After the guide hole is completed, the bend should be checked. For a guide hole with a bend exceeding 2%, it should be judged as a waste hole and cannot continue the reaming operation, otherwise it may cause damage to the drill tool;

[0060] S2. As the drilling progresses, when the drill pipe 5 bends, the friction between the drill pipe 5 and the guide hole increases at this time, the torque transmission efficiency decreases, the centrifugal force received by the centrifugal block 66 is small, the centrifugal block 66 is pulled by the spiral spring 68, the centrifugal block 66 uses the connecting rod to push up the sliding ring 69, and the sliding ring 69 and the skateboard 610 push the hydraulic oil in the first hydraulic injector 611 into the hydraulic telescopic rod 613, so that the hydraulic recovery mechanism 7 extends, increasing the pressure between the hydraulic recovery mechanism 7 and the hole wall. The hole wall generates a reverse supporting force on the hydraulic recovery mechanism 7 and the centering ring 61, offsetting the inclination trend of the drill pipe 5, reducing the bending deformation of the drill pipe 5 and the friction with the hole wall;

[0061] S3. After the first arc plate 71 is pushed out by the hydraulic telescopic rod 613, the second arc plate 73 contacts the hole wall. When the formation where the hole wall is located is soft, the elastic force of the support spring 72 supports on the second arc plate 73. Due to the elasticity of the support spring 72, the soft hole wall cannot press the second arc plate 73 towards the first arc plate 71. At this time, there is a space for accommodating hydraulic oil in the second hydraulic injector 75, and the hydraulic oil in the hydraulic telescopic rod 613 enters the second hydraulic injector 75 to prevent the hydraulic telescopic rod 613 from protruding and forcibly squeezing the hole wall to cause spalling or collapse;

[0062] S4. When the slide plate 610 slides upward, the slide plate 610 squeezes the lubricating oil injection member 83 to extrude the lubricating oil therein from the spray outlet 84, so as to reduce the friction between the drill pipe 5 and the hole wall, maintain the rotation speed of the drill pipe 5, and avoid misjudgment of the straightening mechanism 6;

[0063] S5. After the raise-bore is drilled through, use a rod wrench at the lower working face to remove the cone bit and the short joint rod, transport the reaming cutter head to the lower working face, connect the cutter head and the drill pipe 5 with a lifting tool, evenly apply special drill tool thread grease on the male thread end of the pull rod, contact the operator at the upper working face through timely communication, slowly lift the drill pipe, after the cutter head is lifted upright, remove the lifting tool, and direct the operator to connect and tighten the drill pipe thread.

[0064] The above specific embodiments are only several alternative embodiments of the present invention. Based on the technical solution of the present invention and the relevant revelations of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. An raise boring machine for fitting inclined ore bodies, comprising a support base (1). At the top of the support base (1), two symmetrically arranged hydraulic lifting platforms (2) are fixedly installed. Between the two hydraulic lifting platforms (2), a drilling machine driving device (3) is fixedly installed. The bottom of the drilling machine driving device (3) is rotatably connected to a drill pipe (5). It is characterized in that: A straightening mechanism (6), including two symmetrically arranged straightening rings (61). Between the two straightening rings (61), a straightening shaft (62) in contact with the drill pipe (5) is rotatably connected. The inner wall of the straightening ring (61) is rotatably connected to a rotating shaft (65). A transmission member is arranged between the straightening shaft (62) and the rotating shaft (65). The middle part of the rotating shaft (65) is slidably connected to a sliding ring (69). A centrifugal member connected to the sliding ring (69) is arranged on the outer wall of the rotating shaft (65). The top of the sliding ring (69) is rotatably connected to a sliding plate (610). A first hydraulic injector (611) is fixedly installed between the top of the sliding plate (610) and the straightening ring (61). A hydraulic telescopic rod (613) is fixedly installed on the inner wall of the straightening ring (61). A first hydraulic pipe (612) is fixedly connected between the first hydraulic injector (611) and the hydraulic telescopic rod (613); A hydraulic recovery mechanism (7) arranged at the end of the hydraulic telescopic rod (613) is slidably connected to the inner wall of the straightening ring (61).

2. The raise boring machine for fitting an inclined ore body according to claim 1, wherein: The centrifugal member includes a guide rod (67). The end of the guide rod (67) is fixedly installed on the outer wall of the rotating shaft (65). A plurality of guide rods (67) are provided and are distributed at equal angles around the rotating shaft (65) in a ring shape. A centrifugal block (66) is slidably connected to the guide rod (67). A spiral spring (68) is elastically connected between the centrifugal block (66) and the rotating shaft (65). The top of the centrifugal block (66) is hinged to the sliding ring (69) through a connecting rod.

3. The raise boring machine for fitting inclined ore bodies according to claim 2, wherein: The transmission member includes a large gear (63). The large gear (63) rotates inside the straightening ring (61). The end of the straightening shaft (62) is rotatably connected to the large gear (63). A small gear (64) meshing with the large gear (63) is rotatably connected inside the straightening ring (61). The small gear (64) is fixedly installed at the end of the rotating shaft (65). The diameter of the straightening shaft (62) is smaller than the diameter of the drill pipe (5). The diameter of the small gear (64) is smaller than the diameter of the straightening shaft (62).

4. The raise boring machine for fitting inclined ore bodies according to claim 3, characterized in that: The hydraulic recovery mechanism (7) includes a first arc plate (71). The side of the first arc plate (71) is fixedly connected to the hydraulic telescopic rod (613). A support spring (72) is elastically installed on the side of the first arc plate (71) away from the hydraulic telescopic rod (613). The other end of the support spring (72) is fixedly installed with a second arc plate (73). A second hydraulic injector (75) is fixedly installed on the side of the first arc plate (71). A connecting rod (74) fixedly connected to the second hydraulic injector (75) is fixedly installed on the side of the second arc plate (73). The second hydraulic injector (75) is communicated with the hydraulic telescopic rod (613) through a second hydraulic pipe (76).

5. The raise boring machine for fitting inclined ore bodies according to claim 4, wherein: The second arc plate (73) contacts the hole wall. The support spring (72) is a spring with a high elastic coefficient. The second arc plate (73) is slidably connected to the centralizer ring (61). Four hydraulic recovery mechanisms (7) are provided and are annularly and equally angularly distributed on the inner wall of the centralizer ring (61).

6. The raise boring machine for fitting an inclined ore body according to claim 5, characterized in that: A second hydraulic injector (75) is fixedly installed on the first arc plate (71) away from the hydraulic telescopic rod (613). The second hydraulic injector (75) is located on the moving path of the second arc plate (73). The connecting rod (74) is slidably connected to the first arc plate (71).

7. The raise boring machine for fitting inclined ore bodies according to claim 6, wherein: A lubrication mechanism (8) is provided on the top of the sliding plate (610). The lubrication mechanism (8) includes a lubricating oil injection member (83). The two ends of the lubricating oil injection member (83) are respectively fixedly connected to the centralizer ring (61) and the sliding plate (610). Lubricating oil is stored inside the lubricating oil injection member (83). A spray outlet (84) is opened at the bottom of the centralizer ring (61). The lubricating oil injection member (83) is communicated with the spray outlet (84) through a pipeline. The outlet of the spray outlet (84) faces the drill pipe (5).

8. An raise boring machine for fitting inclined ore bodies according to claim 7, characterized in that: A plurality of limiting rods (81) are fixedly installed inside the centralizer ring (61). Two by two as a group, the same sliding plate (610) is slidably connected to the two limiting rods (81) in a group. A limiting plate (82) is fixedly installed at the bottom of the limiting rod (81).

9. The raise boring machine for fitting inclined ore bodies according to claim 8, wherein: A hydraulic support rod (4) is rotatably connected between the back of the drilling rig driving device (3) and the support base (1). The hydraulic support rod (4) is inclined. The support base (1) adopts a rotatable double-section design. A cylindrical opening for guiding the drill pipe (5) is opened on the support base (1).

10. A drilling method for a raise boring machine adapted to an inclined ore body, applied to a raise boring machine adapted to an inclined ore body as described in claim 9 above, the steps are as follows: S1. Drill a pilot hole with a diameter of 250 mm to drill a small-diameter pilot hole from top to bottom. Control the drilling deviation rate within 1 and achieve the breakthrough point. Ensure the slag discharge, water volume and water pressure, and discharge the rock slag in the hole to prevent hole blockage. After the pilot hole is completed, the curvature should be checked. For a pilot hole with a curvature exceeding 2%, it should be judged as a waste hole and the reaming operation cannot continue, otherwise it may cause damage to the drill tool; S2. As the drilling progresses, when the drill pipe (5) bends, the frictional force between the drill pipe (5) and the pilot hole increases at this time, the torque transmission efficiency decreases, the centrifugal force received by the centrifugal block (66) is small, the centrifugal block (66) is pulled by the helical spring (68), the centrifugal block (66) pushes up the slip ring (69) by means of a connecting rod, and the slip ring (69) and the slide plate (610) push the hydraulic oil in the first hydraulic injector (611) into the hydraulic telescopic rod (613), so that the hydraulic recovery mechanism (7) extends, increasing the pressure between the hydraulic recovery mechanism (7) and the hole wall. The hole wall generates a reverse supporting force on the hydraulic recovery mechanism (7) and the centralizing ring (61), offsetting the inclination tendency of the drill pipe (5) and reducing the bending deformation of the drill pipe (5) and the friction with the hole wall; S3. After the first arc plate (71) is pushed out by the hydraulic telescopic rod (613), the second arc plate (73) contacts the hole wall. When the formation where the hole wall is located is soft, the elastic force of the support spring (72) supports on the second arc plate (73). Due to the elasticity of the support spring (72), the soft hole wall cannot press the second arc plate (73) towards the first arc plate (71). At this time, there is a space in the second hydraulic injector (75) to accommodate hydraulic oil, and the hydraulic oil in the hydraulic telescopic rod (613) enters the second hydraulic injector (75), preventing the hydraulic telescopic rod (613) from extending and forcibly squeezing the hole wall to cause spalling or collapse; S4. When the slide plate (610) slides upward, the slide plate (610) squeezes the lubricating oil injection part (83) to extrude the lubricating oil therein from the spray outlet (84), so as to reduce the frictional force between the drill pipe (5) and the hole wall, and thus maintain the rotation speed of the drill pipe (5) and avoid misjudgment of the centralizing mechanism (6); S5. After the raise-bore is drilled through, use a rod wrench at the lower working face to remove the roller bit and the short joint rod, transport the reaming cutter head to the lower working face, connect the cutter head and the drill pipe (5) with a lifting tool, evenly apply special drill tool thread grease on the male thread end of the pull rod, contact the operator at the upper working face through timely communication means, slowly lift the drill pipe, after the cutter head is lifted upright, remove the lifting tool, and direct the operator to connect and tighten the drill pipe threads.

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