A hole blocking prevention device at the junction of coal and rock in a through-layer drilling bottom plate and a method of using the device

Abstract

The present invention relates to a device for preventing hole blockage at the junction of coal and rock on the bottom plate of a through-layer drilling hole and a method for using the device, comprising a main body whose top passes through a hole drilled in a soft coal seam and extends into the soft coal seam, and the top of the main body is rotatably connected with a surrounding material guide plate, through which the blockage of the hole at the junction of coal and rock on the bottom plate of the coal seam can be effectively prevented during the coal unloading process, thereby effectively improving the coal unloading efficiency; an installation groove corresponding to the material guide plate is surroundingly provided on the inner wall of the main body, a screw rod is rotatably connected in the installation groove, a transmission block is threadedly sleeved on the screw rod, a fixed block corresponding to the transmission block is fixedly connected to the inner wall of the guide plate, the transmission block and the fixed block are rotatably connected via a transmission rod, the bottom of the screw rod passes through the inner wall of the installation groove and is fixedly connected with a knob, the screw is driven to rotate by turning the knob, and the transmission block can be driven to move by the screw, thereby driving the guide plate to move through the transmission action of the transmission rod and the fixed block, so that the angle of the guide plate is conveniently adjusted.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mine machinery, and relates to a hole blocking prevention device at the junction of coal and rock on a bottom plate of a through-layer drilling hole and a use method thereof. Background Art

[0002] Coal seam gas is not only the main factor affecting the safe and efficient production of coal mines, but also a valuable energy resource. Gas extraction is a fundamental measure to eliminate major gas accidents in coal mines, and is also an important measure to obtain clean energy, increase energy supply, and reduce environmental pollution. As the mines go deeper, the gas pressure and gas content increase, and gas disasters become increasingly serious. Gas extraction has become an important technical means to ensure the safe production of high-gas mines and outburst mines, and has been widely used.

[0003] Due to the limitations of geological conditions and the influence of low permeability and soft coal seams, traditional drilling along the seams is prone to shallow drilling depth and uneven control, which cannot fundamentally guarantee the effect of gas control. Using the coal seam floor rock tunnel to construct through-layer drilling to the coal seam, large-scale pre-extraction of unmined areas is carried out. First, it ensures that the drilling holes are arranged in place and evenly controlled. Second, with the protection of rock pillars, safe operation is guaranteed. Bottom-layer drilling to pre-extract coal seam gas has become the main technical measure for preventing coal and gas outburst accidents and ensuring safe operation in outburst mines.

[0004] However, during the process of cutting and unloading coal, phenomena such as hole collapse and drill jamming may occur. Through on-site research, it was found that hole blockage is very likely to occur at the junction of coal and rock on the bottom plate of the coal seam, causing the drill rod to stick and get stuck. Summary of the invention

[0005] In view of this, in order to solve the problem in the prior art that hole blockage is easy to occur at the junction of coal and rock in the bottom plate of the coal seam, causing the drill rod to stick and the drill to get stuck, the present invention proposes a device for preventing hole blockage at the junction of coal and rock in the bottom plate of a through-layer drilling hole and a method of using the device.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A device for preventing hole blockage at the junction of coal and rock on the bottom plate of a through-layer drilling hole comprises a main body whose top passes through a hole drilled in a soft coal seam and extends into the soft coal seam, the top of the main body is rotatably connected with a surrounding material guide plate; an inner wall of the main body is surrounded by a mounting groove corresponding to the material guide plate, a screw is rotatably connected in the mounting groove, a transmission block is threadedly sleeved on the screw, a fixed block corresponding to the transmission block is fixedly connected to the inner wall of the material guide plate, the transmission block and the fixed block are rotatably connected via a transmission rod, and the bottom of the screw passes through the inner wall of the mounting groove and is fixedly connected with a knob.

[0008] The beneficial effects of this basic scheme are: by setting up a guide plate, it is possible to effectively prevent blockage at the junction of coal and rock on the bottom plate of the coal seam during coal unloading, thereby effectively improving the coal unloading efficiency; by turning the knob to drive the screw to rotate, the screw can drive the transmission block to move, and thus the guide plate can be driven to move through the transmission action of the transmission rod and the fixed block, thereby facilitating the adjustment of the angle of the guide plate.

[0009] Further: a slide groove is provided on the outer wall of the guide plate, a support rod is fixedly connected in the slide groove, a support block is slidably sleeved on the support rod, and the support block is rotatably connected to the outer wall of the main pipe body through a connecting rod. Beneficial effect: the guide plate is supported by the connecting rod.

[0010] Further: a first spring is sleeved on the support rod, and two ends of the first spring are fixedly connected to the support block and the inner wall of the slide groove respectively. Beneficial effect: the first spring elastically supports the support block.

[0011] Further: a torsion spring is sleeved on the rotating shaft at the connection between the top of the main body and the guide plate, and the two ends are respectively fixedly connected to the guide plate and the top of the main body. Beneficial effect: the torsion spring plays a torsion support role for the guide plate.

[0012] Further: a slide bar is fixedly connected in the installation groove, a slide opening corresponding to the slide bar is provided on the transmission block, a plurality of steel balls are slidably connected in the slide opening, and the edges of the steel balls are in contact with the slide bar. Beneficial effect: the steel balls reduce the friction between the slide bar and the inner wall of the slide opening.

[0013] Further: a clamping block is fixedly connected to the bottom of the main body, a clamping rod is slidably inserted on the clamping block, a clamping rod is arranged around the knob, and a plurality of clamping grooves adapted to the clamping rod are arranged around the knob.

[0014] Further: one end of the clamping rod close to the knob is fixedly sleeved with a clamping sleeve, and one end of the clamping rod away from the clamping sleeve is fixedly connected with a pull rod.

[0015] Further: the clamping rod is sleeved with a second spring whose two ends are respectively fixedly connected to the clamping sleeve and the clamping block. Beneficial effect: the second spring provides a certain elastic support to the clamping rod.

[0016] Further: an end of the fixed block away from the guide plate is fixedly connected with an arc plate. Beneficial effect: the arc plate facilitates the coal to fall into the main pipe.

[0017] A method for using a hole blocking prevention device at the junction of coal and rock in a through-layer drilling bottom plate comprises the following steps:

[0018] S1. Insert the main body into the borehole through the soft coal seam so that the top of the guide plate around the main body is located at the junction of the coal and rock on the coal seam floor;

[0019] S2. The screw is driven to rotate by turning the knob in the bottom plate tunnel, and the rotation of the screw drives the transmission block to move longitudinally, thereby driving the guide plate to move through the coordinated transmission action of the transmission rod and the fixed block, and adjusting the angle of the guide plate to facilitate the coal to fall into the main pipe, while preventing the occurrence of blockage in the soft coal seam.

[0020] The beneficial effects of the present invention are:

[0021] 1. The device for preventing hole blockage at the junction of coal and rock in the bottom plate of the through-layer drilling hole disclosed in the present invention can effectively prevent hole blockage at the junction of coal and rock in the coal seam bottom plate during coal unloading through the guide plate and the arc plate, thereby effectively improving the coal unloading efficiency.

[0022] 2. The device for preventing hole blockage at the junction of coal and rock on the bottom plate of a through-layer drilling hole disclosed in the present invention inserts the main pipe into the drill hole so that the top of the guide plate is located at the junction of the coal and rock on the bottom plate of the coal seam. The screw rod is then driven to rotate by turning the knob, and the transmission block can be driven to move by the screw rod, thereby driving the guide plate to move through the transmission action of the transmission rod and the fixed block, and adjusting the angle of the guide plate. At the same time, the setting of the support mechanism can prevent the guide plate from shaking.

[0023] 3. The device for preventing hole blockage at the junction of coal and rock in the bottom plate of the through-layer drilling hole disclosed in the invention can conveniently fix the knob through the setting of the clamping rod, and the spring can provide a certain elastic support for the clamping rod. At the same time, the setting of the sliding rod can prevent the shaking of the transmission block, and the steel ball can reduce the friction between the transmission block and the transmission rod.

[0024] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0026] Figure 1 It is a structural schematic diagram of the device for preventing hole blocking at the junction of coal and rock on the bottom plate of the through-layer drilling hole of the present invention;

[0027] Figure 2 It is a schematic diagram of the installation of the anti-hole blocking device at the junction of coal and rock on the bottom plate of the through-layer drilling hole of the present invention;

[0028] Figure 3 for Figure 1 Schematic diagram of the structure at A in the middle;

[0029] Figure 4 for Figure 1 Schematic diagram of the structure at point B in the middle.

[0030] Figure numerals: 1 bottom plate lane, 2 soft coal seam, 3 drill hole, 4 main body, 5 rotating shaft, 6 guide plate, 7 slide groove, 8 mounting groove, 9 screw, 10 transmission block, 11 transmission rod, 12 fixed block, 13 knob, 14 clamping block, 15 clamping rod, 16 support rod, 17 support block, 18 connecting rod, 19 first spring, 20 arc plate, 21 slide rod, 22 steel ball, 23 sleeve, 24 pull rod, 25 second spring. DETAILED DESCRIPTION

[0031] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0032] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0033] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which 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 operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0034] like Figures 1 to 4The device shown is a hole blocking prevention device at the junction of coal and rock on the bottom plate of a through-layer drilling hole, comprising a main body 4 whose top passes through a drill hole 3 in a soft coal seam 2 and extends into the soft coal seam 2. The top of the main body 4 is rotatably connected to a surrounding material guide plate 6. The material guide plate 6 can effectively prevent the hole from being blocked at the junction of coal and rock on the bottom plate of the coal seam during coal unloading, thereby effectively improving the coal unloading efficiency. A torsion spring with two ends fixedly connected to the material guide plate 6 and the top of the main body 4 respectively is sleeved on the rotating shaft 5 at the connection between the top of the main body 4 and the material guide plate 6. The torsion spring plays a torsion support role for the material guide plate 6.

[0035] The inner wall of the main body 4 is surrounded by a mounting groove 8 corresponding to the guide plate 6, a screw rod 9 is rotatably connected in the mounting groove 8, and a transmission block 10 is threadedly sleeved on the screw rod 9. A fixed block 12 corresponding to the transmission block 10 is fixedly connected to the inner wall of the guide plate 6, and the transmission block 10 and the fixed block 12 are rotatably connected through a transmission rod 11, and the screw rod 9 drives the transmission block 10 to move, thereby driving the guide plate 6 to move through the transmission action of the transmission rod 11 and the fixed block 12, so as to facilitate the adjustment of the angle of the guide plate 6, a sliding rod 21 is fixedly connected in the mounting groove 8, and a sliding mouth corresponding to the sliding rod 21 is provided on the transmission block 10, and a plurality of steel balls 22 are slidably connected in the sliding mouth, and the edges of the steel balls 22 are in contact with the sliding rod 21, and the steel balls 22 reduce the friction between the sliding rod 21 and the inner wall of the sliding mouth, and an arc plate 20 is fixedly connected to the end of the fixed block 12 away from the guide plate 6, and the arc plate 20 facilitates the coal to fall into the main body 4.

[0036] A slide groove 7 is provided on the outer wall of the guide plate 6, and a support rod 16 is fixedly connected in the slide groove 7. A support block 17 is slidably sleeved on the support rod 16. The support block 17 is rotatably connected to the outer wall of the main body 4 through a connecting rod 18, and the guide plate 6 is supported by the connecting rod 18. A first spring 19 is sleeved on the support rod 16, and the two ends of the first spring 19 are fixedly connected to the support block 17 and the inner wall of the slide groove 7 respectively, and the first spring 19 elastically supports the support block 17.

[0037] The bottom of the screw rod 9 passes through the inner wall of the mounting groove 8 and is fixedly connected with a knob 13. The screw rod 9 is driven to rotate by turning the knob 13. The bottom of the main body 4 is fixedly connected with a clamping block 14, and a clamping rod 15 is slidably inserted on the clamping block 14. A plurality of clamping grooves matching the clamping rod 15 are arranged around the knob 13. A clamping sleeve 23 is fixedly sleeved on the end of the clamping rod 15 close to the knob, and a pull rod 24 is fixedly connected on the end of the clamping rod 15 away from the clamping sleeve 23. A second spring 25 is sleeved on the clamping rod 15 at both ends, which is fixedly connected with the clamping sleeve 23 and the clamping block 14 respectively. The second spring 25 provides a certain elastic support for the clamping rod 15.

[0038] The method for using the device for preventing hole blocking at the junction of coal and rock on the bottom plate of a through-layer drilling hole comprises the following steps:

[0039] S1, insert the main body 4 into the drill hole 3 penetrating the soft coal seam 2, so that the top of the guide plate 6 around the main body 4 is located at the junction of the coal and rock on the coal seam floor;

[0040] S2. The screw rod 9 is driven to rotate by rotating the knob 13 in the bottom plate tunnel 1. The rotation of the screw rod 9 drives the transmission block 10 to move longitudinally, thereby driving the guide plate 6 to move through the coordinated transmission action of the transmission rod 11 and the fixed block 12. The angle of the guide plate 6 is adjusted to facilitate the coal to fall into the main pipe 4, while preventing the occurrence of blockage in the soft coal seam.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A device for preventing hole blocking at the junction of coal and rock in a through-layer drilling bottom plate, characterized in that: It comprises a main body whose top passes through a hole drilled in a soft coal seam and extends into the soft coal seam, the top of the main body is rotatably connected with a material guide plate arranged around it; a mounting groove corresponding to the material guide plate is arranged around the inner wall of the main body, a screw is rotatably connected in the mounting groove, a transmission block is threadedly sleeved on the screw, a fixed block corresponding to the transmission block is fixedly connected on the inner wall of the material guide plate, the transmission block and the fixed block are rotatably connected via a transmission rod, the bottom of the screw passes through the inner wall of the mounting groove and is fixedly connected with a knob, the screw is driven to rotate by turning the knob, the screw is driven to rotate by turning the knob in the bottom plate lane, the rotation of the screw drives the transmission block to move longitudinally, thereby driving the guide plate to move through the coordinated transmission action of the transmission rod and the fixed block to adjust the angle of the guide plate.

2. The device for preventing hole blocking at the junction of coal and rock at the bottom plate of a through-layer drilling hole as claimed in claim 1 is characterized in that: A slide groove is arranged on the outer wall of the guide plate, a support rod is fixedly connected in the slide groove, a support block is slidably sleeved on the support rod, and the support block is rotatably connected to the outer wall of the main pipe body through a connecting rod.

3. The device for preventing hole blocking at the junction of coal and rock at the bottom plate of a through-layer drilling hole as claimed in claim 2 is characterized in that: The support rod is sleeved with a first spring, and two ends of the first spring are respectively fixedly connected to the support block and the inner wall of the slide groove.

4. The device for preventing hole blocking at the junction of coal and rock at the bottom plate of a through-layer drilling hole as claimed in claim 1 is characterized in that: A torsion spring with two ends respectively fixedly connected to the material guide plate and the top of the main body is sleeved on the rotating shaft at the connection between the top of the main body and the material guide plate.

5. The device for preventing hole blocking at the junction of coal and rock at the bottom plate of a through-layer drilling hole as claimed in claim 1 is characterized in that: A slide bar is fixedly connected in the installation groove, a slide opening corresponding to the slide bar is provided on the transmission block, a plurality of steel balls are slidably connected in the slide opening, and the edges of the steel balls are in contact with the slide bar.

6. The device for preventing hole blocking at the junction of coal and rock at the bottom plate of a through-layer drilling hole as claimed in claim 1, characterized in that: The bottom of the main pipe body is fixedly connected with a clamping block, a clamping rod is slidably inserted on the clamping block, a clamping rod is surrounded on the knob, and a plurality of clamping grooves adapted to the clamping rod are surrounded on the knob.

7. The device for preventing hole blocking at the junction of coal and rock at the bottom plate of a through-layer drilling hole as claimed in claim 6 is characterized in that: One end of the clamping rod close to the knob is fixedly sleeved with a clamping sleeve, and one end of the clamping rod away from the clamping sleeve is fixedly connected with a pull rod.

8. The device for preventing hole blocking at the junction of coal and rock at the bottom plate of a through-layer drilling hole as claimed in claim 7 is characterized in that: The clamping rod is sleeved with a second spring whose two ends are respectively fixedly connected to the clamping sleeve and the clamping block.

9. The device for preventing hole blocking at the junction of coal and rock at the bottom plate of a through-layer drilling hole as claimed in claim 1, characterized in that: One end of the fixing block away from the material guiding plate is fixedly connected with an arc plate.

10. The method for using the device for preventing hole blocking at the junction of coal and rock in the bottom plate of a through-layer drilling hole as claimed in claim 1, characterized in that: The following steps are involved: S1. Insert the main body into the borehole through the soft coal seam so that the top of the guide plate around the main body is located at the junction of the coal and rock on the coal seam floor; S2. The screw is driven to rotate by turning the knob in the bottom plate tunnel, and the rotation of the screw drives the transmission block to move longitudinally, thereby driving the guide plate to move through the coordinated transmission action of the transmission rod and the fixed block, and adjusting the angle of the guide plate to facilitate the coal to fall into the main pipe, while preventing the occurrence of blockage in the soft coal seam.

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