An angle-adjustable anti-fall drill rod pushing device for underground coal mines

Abstract

The present invention discloses an angle-adjustable anti-fall drill rod pushing device for use in coal mines. The device comprises a base, two symmetrically arranged pillars are fixed to the base, an angle control mechanism is mounted on the two pillars, the angle control mechanism is connected to an anti-fall pushing mechanism, and a length recording assembly is provided on the base; the angle control mechanism comprises a cross bar, a rotating shaft, and an angle control pin; the anti-fall pushing mechanism comprises a lifting motor, a limiting slide, a first clamping rod assembly, a second clamping rod assembly, and a wire rope. The present invention has the following beneficial effects: the drill rod pushing device can adapt to the pushing of drill rods at different drilling angles, has strong adaptability, realizes uniform and controllable pushing of the drill rod, and can record the pushing depth of the drill rod; and the entire device has a simple structure, is easy to operate, safe and efficient, has wide practicality in the field of drilling detection, and can be widely promoted.

Description

Technical Field

[0001] The invention relates to the technical field of drilling detection, in particular to an angle-adjustable anti-fall drill rod pushing device in a coal mine. Background Art

[0002] Borehole peek technology has been widely used in the exploration and assessment of underground geological conditions in coal mines with complex geological structures. It is particularly useful for detecting the geological structure of the mine's surrounding rock, roof delamination, coal body fault and fissure occurrence, fissure development, and hydraulic fracturing effects. However, the instruments currently available on the market that can detect conditions within underground coal mine boreholes are all inserted into the hole using a handheld push rod after drilling. This makes it difficult to reach deep locations, with the deepest point not exceeding 200 meters, which cannot meet the current drilling detection requirements of 500 to 800 meters for directional drilling construction. Furthermore, the uneven push speed affects the borehole peek imaging effect. Summary of the Invention

[0003] The purpose of the present invention is to provide an angle-adjustable anti-fall drill rod pushing device for use in coal mines, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: an angle-adjustable anti-fall drill rod pushing device in a coal mine, comprising a base, two symmetrically arranged pillars fixed to the base, an angle control mechanism mounted on the two pillars, the angle control mechanism connected to an anti-fall pushing mechanism, and a length recording component provided on the base;

[0005] The angle control mechanism includes a crossbar, with rotation shafts provided at both ends of the crossbar, the two rotation shafts being rotatably connected to the two pillars respectively, the rotation shafts being provided with a plurality of connection holes arranged in a circular pattern, the pillars being provided with positioning holes matching the connection holes, and an angle control pin being connected between the connection holes and the positioning holes;

[0006] The anti-falling sliding mechanism includes a lifting motor and a limiting slide. The limiting slide is vertically installed at the lower middle of the cross bar. Two lifting motors are provided on the cross bar. The two lifting motors are symmetrically arranged on both sides of the limiting slide. The limiting slide is provided with a first clamping rod assembly and a second clamping rod assembly arranged up and down. A steel wire rope is connected between the two lifting motors and the second clamping rod assembly.

[0007] Further preferably, the first clamping rod assembly is fixed on the limiting slide for locking and fixing the drill rod to prevent it from falling; the second clamping rod assembly is slidably arranged on the limiting slide for lifting the drill rod.

[0008] Further preferably, the first and second clamping rod assemblies have the same structure, each comprising a base, a fixed clamping plate, an adjustment screw, and a movable clamping plate. The base is mounted on a limiting slide, the fixed clamping plate is fixedly connected to the base, and the movable clamping plate is connected to the fixed clamping plate via an adjustment screw. The distance between the movable clamping plate and the fixed clamping plate can be adjusted by rotating the adjustment screw, thereby locking drill rods of different specifications. There are two adjustment screws, which are threaded onto the ends of the fixed clamping plate, and the ends of the movable clamping plate are movably mounted on the two adjustment screws.

[0009] It is further preferred that the sides of the movable splint and the fixed splint that are close to each other are provided with arc-shaped grooves to improve the locking force of the movable splint and the fixed splint; the arc-shaped grooves on the movable splint and the fixed splint are provided with anti-slip gaskets to increase the friction resistance between the drill rod and the fixed splint and the movable splint, further improving the locking force of the movable splint and the fixed splint.

[0010] It is further preferred that the two sides of the base of the second clamping rod assembly are respectively connected to two steel ropes, so that the lifting motor drives the second clamping rod assembly to rise through the steel ropes, and can form a strong pull to lower and reset the second clamping rod assembly, ensuring that the second clamping rod assembly descends to an accurate position and will not fall.

[0011] It is further preferred that the connecting holes and the positioning holes are both circular light holes, and the multiple connecting holes are evenly arranged along the circumferential direction of the rotating shaft, so as to realize multi-angle adjustment of the rotating shaft and multi-angle adjustment of the drill rod movement, and can adapt to drilling detection at different angles; the number of the positioning holes is not less than two, so as to ensure that the rotating shaft is firmly fixed; and the light hole structure facilitates the insertion of the angle control pin into the connecting hole and the positioning hole.

[0012] It is further preferred that the sides of the two lifting motors close to the limiting slide are each provided with a guide fixed pulley for supporting the wire rope, which is used for guiding and conveying the wire rope, reducing the friction resistance of the wire rope, and ensuring smooth lifting and lowering of the wire rope.

[0013] Further preferably, the length recording assembly is slidably set on the base, the length recording assembly includes an encoder, the encoder is set below the limit slide, the sliding base is connected to the bottom of the encoder by a fastening bolt, the encoder is connected to a signal line, the signal line is connected to a calculator and a probe, and the position of the encoder can be adjusted with the rotation of the limit slide through the sliding base to ensure that the encoder can always be located below the limit slide, thereby ensuring the signal transmission capability of the signal line.

[0014] Further preferably, a sliding groove is provided on the base, and the sliding base is movably arranged in the sliding groove to facilitate the position adjustment of the sliding base; a plurality of positioning nuts are provided on the sliding base for positioning and locking the position of the sliding base, which is easy to operate.

[0015] Further preferably, the pillar is a trapezoidal pillar, at least two stabilizing connecting rods are provided on the side of the pillar, and a circular mounting groove is provided on the opposite sides of the two pillars, and the positioning hole passes through the mounting groove.

[0016] Beneficial effects: The angle-adjustable anti-fall drill rod pushing device for coal mines of the present invention can fix the rotation angle of the cross bar and adjust the pushing direction of the drill rod through the rotation of the rotating shaft and the plug-in connection of the angle control pin; the drill rod can be prevented from falling through the cooperation of the first clamping rod assembly and the second clamping rod assembly, and can be applicable to the fixing and pushing of drill rods of various specifications; the drill rod pushing speed can be controlled and uniform through the linkage control of the two lifting motors; the drill rod pushing length can be recorded and the real-time peek inside the borehole can be realized through the setting of the encoder, the signal line and the sliding base; the drill rod pushing length can be recorded and the real-time peek inside the borehole can be realized; the drill rod pushing device can adapt to the pushing of drill rods at different drilling angles, has strong adaptability, realizes uniform and controllable pushing of the drill rod, and can record the pushing depth of the drill rod; and the structure of the whole device is simple, the operation is convenient, safe and efficient, it has wide practicality in the field of drilling detection, and can be widely promoted. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the main visual structure of the angle-adjustable anti-fall drill rod pushing device for underground coal mines disclosed in an embodiment of the present invention;

[0018] Figure 2 for Figure 1 A in the middle is an enlarged structural diagram;

[0019] Figure 3 This is a schematic top view of the structure of the angle-adjustable anti-fall drill rod pushing device for underground coal mines disclosed in an embodiment of the present invention;

[0020] Figure 4 This is a left-side structural schematic diagram of the angle-adjustable anti-fall drill rod pushing device for underground coal mines disclosed in an embodiment of the present invention;

[0021] Figure 5 A schematic structural diagram of a crossbar disclosed in an embodiment of the present invention;

[0022] Figure 6 This is a schematic structural diagram of the first clamping rod assembly and the second clamping rod assembly disclosed in an embodiment of the present invention.

[0023] Figure markings: 1-base, 2-pillar, 3-stabilizing connecting rod, 4-cross bar, 5-rotating shaft, 6-connecting hole, 7-positioning hole, 8-angle control pin, 10-guide fixed pulley, 11-steel wire rope, 12-limiting slide, 13-first clamping rod assembly, 14-second clamping rod assembly, 15-base, 16-fixed clamping plate, 17-adjusting screw, 18-movable clamping plate, 19-anti-slip gasket, 20-encoder, 21-sliding base, 22-fastening bolt, 23-sliding groove, 24-positioning nut, 25-signal line, 26-calculator, 27-probe, 28-mounting slot, 29-drill rod. DETAILED DESCRIPTION

[0024] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0025] like Figure 1-6 As shown, an angle-adjustable anti-falling drill rod pushing device is provided in a coal mine, comprising a base 1, on which two symmetrically arranged pillars 2 are fixed, an angle control mechanism is mounted on the two pillars 2, the angle control mechanism is connected to the anti-falling pushing mechanism, and a supporting mechanism is formed by the two pillars 2 to realize the installation and support of the angle control mechanism and the anti-falling pushing mechanism; a length recording component is provided on the base 1, for recording the pushing depth of the drill rod 29 and observing the real-time situation in the borehole.

[0026] The angle control mechanism includes a crossbar 4 for mounting the anti-falling sliding mechanism. Each end of the crossbar 4 is provided with a rotating shaft 5, which is rotatably connected to each of the two pillars 2. The rotating shaft 5 is provided with a plurality of circularly arranged connecting holes 6. The pillars 2 are provided with positioning holes 7 that mate with the connecting holes 6. An angle control pin 8 is connected between the connecting holes 6 and the positioning holes 7. Rotation of the rotating shaft 5 causes the crossbar 4, which is fixedly connected to the rotating shaft 5, to rotate relative to the pillars 2, causing the surface of the crossbar 4, to which the rotating shaft 5 is fixed, to deflect. This in turn changes the angle of the anti-falling sliding mechanism mounted on the crossbar 4, thereby controlling the angle of the drill rod 29 pushed by the anti-falling sliding mechanism. By inserting the angle control pin 8 into the positioning holes 7 on the pillars 2 and the connecting hole 6 on the rotating shaft 5 that mates with the positioning holes 7, the relative position of the rotating shaft 5 and the pillars 2 is positioned, the rotating shaft 5 and the crossbar 4 are fixed, and the rotation angle of the crossbar 4 is fixed. The connection between the crossbar 4 and the pillars 2 is simple, convenient, and easy to adjust.

[0027] In this application, the anti-fall pushing mechanism includes a lifting motor 9 and a limiting slide 12. The limiting slide 12 is vertically installed at the middle and lower part of the cross bar 4. The limiting slide 12 and the cross bar 4 are welded to ensure that the limiting slide 12 can rotate synchronously with the cross bar 4; two lifting motors 9 are provided on the cross bar 4, and the two lifting motors 9 are symmetrically arranged on both sides of the limiting slide 12. The limiting slide 12 is provided with a first clamping rod assembly 13 and a second clamping rod assembly 14 arranged up and down, wherein the first clamping rod assembly 13 is fixed on the limiting slide 12, and is used to fix the drill rod 29 pushed by the anti-fall pushing mechanism to prevent the drill rod 29 from falling; the second clamping rod assembly 14 is slidably arranged on the limiting slide 12, and a steel wire rope 11 is connected between the two lifting motors 9 and the second clamping rod assembly 14. By rotating the lifting motor 9, the steel wire rope 11 is pulled to reel in, thereby pulling the second clamping rod assembly 14 to slide upward along the limiting slide 12, driving the drill rod 29 to slide upward. At the same time, the first clamping rod assembly 13 does not lock and secure the drill rod 29. When the drill rod 29 rises a set distance, the first clamping rod assembly 13 locks the drill rod 29, and the second clamping rod assembly 14 releases the drill rod 29. Then, the wire rope 11 is released. Under the action of gravity, the second clamping rod assembly 14 moves downward to its initial position, driving the wire rope 11 to descend synchronously. At the same time, another drill rod 29 can be connected to the bottom end of the drill rod 29 secured by the first clamping rod assembly 13 and locked and secured by the second clamping rod assembly 14. The newly connected drill rod 29 can then be further pushed upward by the lifting motor 9 and the wire rope 11, thereby achieving orderly transportation of multiple consecutive drill rods 29 within the coal mine and completing the drill rod pushing operation. The anti-fall pushing mechanism has a simple structure and is easy to operate.

[0028] In this application, the first clamping rod assembly 13 and the second clamping rod assembly 14 have the same structure, both of which include a base 15, a fixed clamping plate 16, an adjusting screw 17 and a movable clamping plate 18. The base 15 is sleeved on the limiting slide 12 and is used for connecting the first clamping rod assembly 13 and the second clamping rod assembly 14 with the limiting slide 12. The base 15 is provided with a mounting hole through which the limiting slide 12 passes; the fixed clamping plate 16 is fixedly connected to the base 15, and the movable clamping plate 18 is connected to the fixed clamping plate 16 through the adjusting screw 17. The distance between the movable clamping plate 18 and the fixed clamping plate 16 is adjusted by the adjusting screw 17, so as to clamp and lock the drill rod 29. The adjacent sides of the movable and fixed plates 18, 16 are each provided with an arcuate groove. This arcuate groove adopts a contoured design, enabling the movable and fixed plates 18, 16 to tightly wrap around the drill rod 29, increasing the contact area with the drill rod 29 and ensuring the locking force of the movable and fixed plates 18, 16 on the drill rod 29, thereby ensuring the secure fixation of the drill rod 29. Anti-slip pads 19 are provided in the arcuate grooves on the movable and fixed plates 18, 16, increasing the friction between the movable and fixed plates 18, 16, and the drill rod 29, further enhancing the secure fixation of the drill rod 29.

[0029] In this application, the two sides of the base 15 of the second clamping rod assembly 14 are respectively connected to the two steel ropes 11, wherein the width of the base 15 of the second clamping rod assembly 14 is greater than the width of the base 15 of the first clamping rod assembly 13, which facilitates the connection of the steel rope 11 with the base 15 of the second clamping rod assembly 14 and will not be blocked by the base 15 of the first clamping rod assembly 13, thereby facilitating the lifting and lowering of the steel rope 11.

[0030] In another embodiment of the present application, light holes are provided on the bases of the second clamping rod assembly 14 and the first clamping rod assembly 13, wherein the light hole on the base 15 of the first clamping rod assembly 13 is used for the passage of the wire rope 11, and the light hole on the base 15 of the second clamping rod assembly 13 is used for the connection between the wire rope 11 and the second clamping rod assembly 13.

[0031] In another embodiment of the present application, hooks, hanging holes or protrusions are provided on both sides of the base 15 of the second clamping rod assembly 14 for fixing the wire rope 11, so as to facilitate the connection between the base 15 of the second clamping rod assembly 14 and the wire rope 11 without being blocked by the base 15 of the first clamping rod assembly 13.

[0032] In the present application, the connecting hole 6 is a circular light hole, and multiple connecting holes 6 are evenly arranged along the circumferential direction of the rotating shaft 5, which facilitates the multi-angle adjustment and fixation of the rotating shaft 5. The more connecting holes 6 there are, the more angles the rotating shaft 5 can be adjusted. The positioning hole 7 is a circular light hole, and the positioning hole 7 is used to fix the angle control pin 8. By passing the angle control pin 8 through the positioning hole 7 and the connecting hole 6, the rotating shaft 5 can be fixed, and then the angle of the rotating shaft 5 can be adjusted. The positioning holes are all set at the upper end of the pillar 2. The number of positioning holes 7 is not less than two, and they are set along the circumferential direction of the rotating shaft 5. By setting at least two positioning holes 7, the fixing of the rotating shaft 5 is ensured to be firm, and the rotating shaft 5 can be prevented from rotating, which can cause unstable angle control of the rotating shaft 5.

[0033] In this application, a guide fixed pulley 10 for supporting the wire rope 11 is provided on the side of the two lifting motors 9 close to the limiting slide 12, which can reduce the friction resistance of the wire rope 11 and ensure smooth winding or descending of the wire rope 11.

[0034] In the present application, a length recording assembly is slidably mounted on the base 1 to facilitate its movement. The length recording assembly includes an encoder 20, which is mounted below the limit slide 12. A sliding base 21 is connected to the encoder 20 via a fastening bolt 22. A signal line 25 is connected to the encoder 20, which in turn is connected to a calculator 26 and a probe 27. The encoder is a device that compiles and converts signals or data into a signal format that can be used for communication, transmission, and storage. The probe 27 and the calculator 26 are connected to the encoder 20 via the signal line 25. The probe 27 transmits the drill rod 29 signal to the encoder 20 via the signal line 25. After conversion by the encoder 20, the signal is transmitted to the computer 26, enabling accurate calculation and recording of the distance traveled by the drill rod 29. Furthermore, the specific conditions within the borehole detected by the probe 27 are reflected to the computer 26, enabling real-time visualization of the borehole, ensuring smooth movement of the drill rod 29, and ensuring detection of boreholes in coal mines. The sliding base 21 is used to move the encoder 20 so that the encoder 20 can move to directly below the limit slide 12 to prevent the limit slide 12 from rotating with the cross bar 4, causing the signal line 25 between the probe 27 at the top of the drill rod 29 being moved on the limit slide 12 and the encoder 20 to be pulled or bent and worn, resulting in errors in the signal transmitted by the signal line 25 or the inability to transmit the signal.

[0035] Among them, a sliding groove 23 is provided on the base 1 to cooperate with the sliding base 21, so that the sliding base 21 can slide in the sliding groove 23. In this application, the sliding base 21 and the sliding groove 23 both adopt a mountain-shaped structure design to ensure that the sliding base 21 will not tilt or overturn, and ensure that the length recording component is installed firmly. A plurality of positioning nuts 24 are provided on the sliding base 21 to fix the position of the sliding base 21 relative to the sliding groove 23. The sliding base 21 can be fixed by simply rotating the positioning nuts 24 to lock them on the base 1.

[0036] In this application, the pillars 2 are trapezoidal, with at least two stabilizing rods 3 provided on their sides. The provision of these stabilizing rods 3 enhances the mounting stability of the pillars 2, preventing them from tilting or tipping over, and improving the structural stability of the drill rod pushing device. A circular mounting groove 28 is provided on the opposing sides of each of the two pillars 2, through which the positioning holes 7 extend. These grooves 28 position and support the rotating shaft 5, enhancing the mounting stability of the crossbar 4.

[0037] In this application, the working process of the drill rod pushing device is as follows:

[0038] 1) Adjust the angle control mechanism according to the drilling angle. Rotate the rotating shaft 5 so that the upper surface of the crossbar 4 faces the drill hole. Then, insert the angle control pin 8 into the connecting hole 6 on the rotating shaft 5 and the positioning hole 7 on the support 2 to position the rotating shaft 5 and crossbar 4 so that the length direction of the limiting slide 12 faces the drill hole.

[0039] 2) The anti-falling pushing mechanism is activated, and the drill rod 29 is installed on the limiting slide 12. The upper end of the drill rod passes through the first clamping rod assembly 13, and the lower end of the drill rod is fixed by the second clamping rod assembly 14. The movable clamping plate 18 is locked by the adjusting screw 17 of the second clamping rod assembly 14, thereby locking the drill rod between the movable clamping plate 18 and the fixed clamping plate 16;

[0040] 3) The two lifting motors 9 are started simultaneously, reeling in the steel wire rope 11 and lifting the second clamping rod assembly 14 via the steel wire rope 11, causing the second clamping rod assembly 14 to move upward along the limiting slide 12, thereby driving the drill rod 29 to move upward synchronously and deeper into the drill hole; when the second clamping rod assembly 14 rises to the set position, the first clamping rod assembly 13 locks and secures the drill rod 29, and then the second clamping rod assembly 14 releases the drill rod 29 and slides down to the set position;

[0041] 4) Connect a new drill rod 29 to the drill rod 29 secured by the first clamping rod assembly 13 , then secure the new drill rod 29 with the second clamping rod assembly 14 while the first clamping rod assembly 13 releases the previous drill rod 29 ;

[0042] 5) The two lifting motors 9 are started again, and the second clamping rod assembly 14 is pulled up by the wire rope 11, driving the two connected drill rods 29 to rise synchronously. Similarly, the orderly movement of multiple drill rods 29 is achieved, and the total length of the drill rods 29 is recorded by the length recording assembly and the borehole is monitored through peek.

[0043] In this application, the drill rod pushing device can adapt to the movement of drill rods at different drilling angles, has strong adaptability, realizes uniform and controllable movement of the drill rod 29, and can record the movement depth of the drill rod 29 at the same time; and the entire device has a simple structure, easy operation, safety and efficiency, has wide practicality in the field of drilling detection, and can be widely promoted.

[0044] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An angle-adjustable anti-fall drill rod pushing device for underground coal mines, comprising a base (1), two symmetrically arranged pillars (2) being fixed on the base (1), characterized in that: An angle control mechanism is mounted on the two pillars (2), the angle control mechanism is connected to an anti-falling pushing mechanism, and a length recording component is provided on the base (1); The angle control mechanism comprises a crossbar (4), both ends of the crossbar (4) are provided with a rotation shaft (5), the two rotation shafts (5) are respectively rotatably connected to the two pillars (2), the rotation shaft (5) is provided with a plurality of connection holes (6) arranged in a circular shape, the pillars (2) are provided with positioning holes (7) matching the connection holes (6), and an angle control pin (8) is connected between the connection hole (6) and the positioning hole (7); The anti-falling sliding mechanism comprises a lifting motor (9) and a limiting slide (12), wherein the limiting slide (12) is vertically mounted below the middle of the cross bar (4), and two lifting motors (9) are provided on the cross bar (4), and the two lifting motors (9) are symmetrically arranged on both sides of the limiting slide (12), and the limiting slide (12) is provided with a first clamping rod assembly (13) and a second clamping rod assembly (14) arranged up and down, and a steel wire rope (11) is connected between the two lifting motors (9) and the second clamping rod assembly (14); The first clamping rod assembly (13) is fixed on the limiting slide (12), and the second clamping rod assembly (14) is slidably arranged on the limiting slide (12). The first clamping rod assembly (13) and the second clamping rod assembly (14) have the same structure and both include a base (15), a fixed clamping plate (16), an adjusting screw (17) and a movable clamping plate (18). The base (15) is sleeved on the limiting slide (12), the fixed clamping plate (16) is fixedly connected to the base (15), and the movable clamping plate (18) is connected to the fixed clamping plate (16) via the adjusting screw (17); The connecting holes (6) and the positioning holes (7) are both circular light holes, a plurality of the connecting holes (6) are evenly arranged along the circumferential direction of the rotating shaft (5), and the number of the positioning holes (7) is not less than two.

2. The angle-adjustable anti-fall drill rod pushing device for underground coal mines according to claim 1, characterized in that: The sides of the movable splint (18) and the fixed splint (16) that are close to each other are both provided with arc-shaped grooves, and anti-slip pads (19) are both provided in the arc-shaped grooves on the movable splint (18) and the fixed splint (16).

3. The angle-adjustable anti-fall drill rod pushing device for underground coal mines according to claim 1, characterized in that: Both sides of the base (15) of the second clamping rod assembly (14) are respectively connected to two steel wire ropes (11).

4. The angle-adjustable anti-fall drill rod pushing device for underground coal mines according to claim 1, characterized in that: The sides of the two lifting motors (9) close to the limiting slide plate (12) are each provided with a guide fixed pulley (10) for supporting the wire rope (11).

5. The angle-adjustable anti-fall drill rod pushing device for underground coal mines according to claim 1, characterized in that: The length recording component is slidably arranged on the base (1), and the length recording component includes an encoder (20). The encoder (20) is arranged below the limit slide (12). The encoder (20) is connected to a sliding base (21) below via a fastening bolt (22). The encoder (20) is connected to a signal line (25), and the signal line (25) is connected to a calculator (26) and a probe (27).

6. The angle-adjustable anti-fall drill rod pushing device for underground coal mines according to claim 5, characterized in that: A sliding groove (23) is provided on the base (1), the sliding base (21) is movably arranged in the sliding groove (23), and a plurality of positioning nuts (24) are provided on the sliding base (21).

7. The angle-adjustable anti-fall drill rod pushing device for underground coal mines according to claim 1, characterized in that: The pillar (2) is a trapezoidal pillar, and at least two stabilizing connecting rods (3) are provided on the side of the pillar (2). A circular mounting groove (28) is provided on the opposite sides of the two pillars (2), and the positioning hole (7) passes through the mounting groove (28).

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