Ground drilling device for underground coal mine goaf

Abstract

The utility model relates to the technical field of drilling devices, in particular to an underground coal mine goaf ground drilling device which is characterized in that a movable frame is slidably connected to a supporting frame, an electric telescopic rod used for driving the movable frame to move in the vertical direction is fixedly connected to the upper end of the supporting frame, a motor is fixedly connected to the movable frame, and a frequency converter is fixedly connected to the movable frame; the frequency converter is connected with a motor through a wire, a threaded drill rod is fixedly connected to the output end of the motor, a groove is formed in the bottom end of the threaded drill rod, a gas sensor is connected into the groove, and a protective net is fixedly connected to the groove. In the rotating process of the threaded drill rod, the gas sensor detects the gas concentration at the drilling position, the drilling speed of the motor is controlled through the frequency converter according to the gas concentration detected by the gas sensor, and meanwhile the speed that the electric telescopic rod drives the movable frame to move downwards is controlled according to the gas concentration detected by the gas sensor. Therefore, the gas outburst phenomenon caused by too high drilling speed is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to borehole device technical field especially relates to a ground borehole device of underground coal mine goaf. BACKGROUND

[0002] In coal mine production, due to the relatively slow coal seam recovery speed, the short and thick spontaneous combustion period of residual float coal in goaf, the serious air leakage of goaf and other reasons, the goaf coal spontaneous combustion phenomenon is relatively common in many domestic mines, especially in resource integration mines.

[0003] In order to avoid the spontaneous combustion of goaf float coal in the process of coal seam recovery, the coal mining enterprises need to carry out grouting, nitrogen injection and other fire prevention and extinguishing operations to the goaf after coal mining, and the ground of the goaf needs to be drilled before the operation, when drilling with the drilling device, the drilling speed of the drilling device is too fast, and the gas concentration in the underground space of the coal mine goaf is high, which is easy to cause gas outburst. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of ground borehole devices of underground coal mine goaf, to solve the shortcoming of prior art, drilling speed is too fast, easy to cause gas outburst phenomenon.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] Design a kind of ground borehole devices of underground coal mine goaf, including support frame, the movable frame is slidably connected on the support frame, the upper end of the support frame is fixedly connected with the electric telescopic rod for driving movable frame moves in vertical direction, motor is fixedly connected on the movable frame, frequency converter is fixedly connected on the movable frame, the frequency converter is connected with the motor by wire, the output end of the motor is fixedly connected with threaded drill rod, recess is set up in the bottom end of the threaded drill rod, gas sensor is connected in the recess, protective net is fixedly connected on the recess.

[0007] Preferably, the support frame is sprayed with a corrosion-resistant layer.

[0008] Preferably, the support frame is inserted with a plug rod for fixing on both sides.

[0009] Preferably, the bottom end of the threaded drill rod is fixedly connected with a first protruding ring and a second protruding ring, and the protective net is located between the first protruding ring and the second protruding ring.

[0010] Preferably, the support frame is fixedly connected with two parallelly arranged moving mechanisms on one side, the moving mechanism includes a mounting plate, the mounting plate is fixedly connected to the support frame, and universal wheels are fixedly connected to both sides of the support frame.

[0011] The underground coal mine goaf ground drilling device has the beneficial effects that:

[0012] The gas concentration of the drilling position is detected by the gas sensor during the rotation of the threaded drill rod, the drilling speed of the motor is controlled by the frequency converter according to the gas concentration detected by the gas sensor, and the speed of the movable frame driven by the electric telescopic rod to move downward is controlled according to the gas concentration detected by the gas sensor, so that the gas outburst phenomenon caused by too fast drilling speed is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 The underground coal mine goaf ground drilling device has the beneficial effects that: Figure 1 ;

[0014] Figure 2 The underground coal mine goaf ground drilling device has the beneficial effects that: Figure 2 ;

[0015] Figure 3 The underground coal mine goaf ground drilling device has the beneficial effects that:

[0016] Figure 4 The underground coal mine goaf ground drilling device has the beneficial effects that: Figure 3 The underground coal mine goaf ground drilling device has the beneficial effects that:

[0017] In the figure: 1, support frame; 2, plug rod; 3, movable frame; 4, electric telescopic rod; 5, motor; 6, frequency converter; 7, threaded drill rod; 8, groove; 9, gas sensor; 10, protective net; 11, first protruding ring; 12, second protruding ring; 13, moving mechanism; 131, mounting plate; 132, universal wheel. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0019] Embodiment 1: refer to Figures 1-4The utility model provides a kind of underground coal mine goaf ground drilling device, including support frame 1, support frame 1 is sprayed with anticorrosive layer, both sides of support frame 1 are inserted with the plug rod 2 for fixed, support frame 1 is slidably connected with movable frame 3, the upper end of support frame 1 is fixedly connected with the electric telescopic handle 4 for driving movable frame 3 moves in vertical direction, movable frame 3 is fixedly connected with motor 5, movable frame 3 is fixedly connected with frequency converter 6, frequency converter 6 is connected motor 5 by wire, the output end of motor 5 is fixedly connected with threaded drill rod 7, recess 8 is established in the bottom of threaded drill rod 7, gas sensor 9 is connected in recess 8, protective net 10 is fixedly connected on recess 8.

[0020] Working process:

[0021] When carrying out ground drilling, support frame 1 is placed on ground, plug rod 2 is fixed on ground by passing through support frame 1, support frame 1 is fixed, motor 5 is energized to start after driving threaded drill rod 7 rotates, electric telescopic handle 4 starts after driving movable frame 3 moves downwards, movable frame 3 drives motor 5 to move, motor 5 drives threaded drill rod 7 to move downwards, threaded drill rod 7 is contacted with ground after carrying out drilling to it;

[0022] The gas concentration of drilling position is detected by gas sensor 9 during the rotation of threaded drill rod 7, according to the gas concentration detected by gas sensor 9, the drilling speed of motor 5 is controlled by frequency converter 6, and the speed of movable frame 3 moving downwards driven by electric telescopic handle 4 is controlled according to the gas concentration detected by gas sensor 9, so that the phenomenon of gas outburst caused by too fast drilling speed is avoided, and protective net 10 shields recess 8, to avoid soil into recess 8, and gas sensor 9 is protected.

[0023] Embodiment 2: refer to Figure 4 As another preferred embodiment of the utility model, it is different from embodiment 1 that the bottom of threaded drill rod 7 is fixedly connected with first protruding ring 11 and second protruding ring 12, protective net 10 is located between first protruding ring 11 and second protruding ring 12, first protruding ring 11 and second protruding ring 12 are rotated after threaded drill rod 7 rotates, because protective net 10 is located between first protruding ring 11 and second protruding ring 12, the extrusion force of soil to protective net 10 is reduced.

[0024] Embodiment 3: in embodiment 1, refer to Figure 2 As another preferred embodiment of the utility model, it is different from embodiment 1 that one side of support frame 1 is fixedly connected with two parallelly arranged moving mechanisms 13, moving mechanism 13 includes mounting plate 131, mounting plate 131 is fixedly connected to support frame 1, both sides of support frame 1 are fixedly connected with universal wheel 132, when moving device, support frame 1 is laid down, so that universal wheel 132 is contacted with ground, the device is moved by universal wheel 132, and the device is conveniently moved.

[0025] The above merely describes a preferred embodiment of the present application, but the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A surface drilling device for underground coal mine goaf areas, characterized in that, Includes a support frame (1), wherein: A movable frame (3) is slidably connected to the support frame (1). An electric telescopic rod (4) for driving the movable frame (3) to move vertically is fixedly connected to the upper end of the support frame (1). A motor (5) is fixedly connected to the movable frame (3). A frequency converter (6) is fixedly connected to the movable frame (3). The frequency converter (6) is connected to the motor (5) through a wire. A threaded drill rod (7) is fixedly connected to the output end of the motor (5). A groove (8) is opened at the bottom end of the threaded drill rod (7). A gas sensor (9) is connected in the groove (8). A protective net (10) is fixedly connected to the groove (8).

2. The surface drilling device for underground coal mine goaf areas according to claim 1, characterized in that, The support frame (1) is coated with an anti-corrosion layer.

3. The surface drilling device for underground coal mine goaf areas according to claim 2, characterized in that, Both sides of the support frame (1) are fitted with insert rods (2) for fixing.

4. The surface drilling device for underground coal mine goaf areas according to claim 1, characterized in that, The bottom end of the threaded drill rod (7) is fixedly connected with a first protruding ring (11) and a second protruding ring (12), and the protective net (10) is located between the first protruding ring (11) and the second protruding ring (12).

5. The surface drilling device for underground coal mine goaf areas according to claim 1, characterized in that, Two parallel moving mechanisms (13) are fixedly connected to one side of the support frame (1). The moving mechanism (13) includes a mounting plate (131), which is fixedly connected to the support frame (1). Both sides of the support frame (1) are fixedly connected with casters (132).

Images