Large-diameter drilling pressure relief device for elastic area of main roadway coal pillar
By designing a large-diameter borehole pressure relief device for the elastic zone of the main roadway coal pillar, and using a motor-driven lifting assembly to adjust the height and rotation of the drill bit, the pressure relief problem in the elastic zone of the main roadway coal pillar was solved, the internal strain energy of the coal pillar was released, the risk of sudden damage was reduced, and the safety and stability of the mine were ensured.
Patent Information
- Application Number
- CN202520792297.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-24
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-04-24
AI Technical Summary
The lack of large-diameter boreholes for pressure relief in the elastic zone of the main roadway coal pillars leads to stress concentration, which may cause sudden instability, roadway deformation and equipment damage, increasing support and maintenance costs and disaster prevention and control difficulties, and threatening the safe operation of the mine.
Design a large-diameter drilling pressure relief device for the elastic zone of a coal pillar in a main roadway, including a base, a drill bit, a telescopic sleeve, a lifting plate, and a motor-driven lifting assembly. The height and rotation of the drill bit are controlled by the motor to achieve drilling pressure relief and release the elastic strain energy inside the coal pillar.
It significantly reduces the risk of sudden failure of coal pillars due to stress concentration, avoids severe deformation of roadways or roof collapse accidents, ensures long-term safety and stability of main roadways in mines, and extends the bearing life of coal pillars. It is suitable for coal pillar stability control in deep, high-stress mines.
Smart Images
Figure CN223854162U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of pressure relief by drilling, and particularly relates to a large-diameter drilling pressure relief device for an elastic area of a large roadway coal pillar. BACKGROUND
[0002] The elastic area of the large roadway coal pillar refers to a specific area in a high stress concentration zone on both sides of a large roadway of a mine formed due to mining activities, in which the coal pillar has not yet yielded plastically and still maintains the ability of elastic deformation, the core feature of which is that the coal body is in a critical state of high stress (usually 1.5-3 times of the original rock stress) but not damaged, the internal elastic strain energy continuously accumulates and can release part of the energy through micro-crack expansion, the area is a key bearing structure for maintaining the stability of the roadway and is also a potential dynamic disaster source, and thus needs to be controlled by stress monitoring and reasonable support to achieve elastic balance.
[0003] The existing elastic area of the large roadway coal pillar does not have the function of large-diameter drilling pressure relief, which causes the continuous accumulation of the internal elastic strain energy of the coal pillar, aggravates stress concentration, and may cause sudden instability or rock burst, thereby causing roadway deformation, equipment damage and personnel casualties, accelerating the degradation of the bearing capacity of the coal pillar, increasing the support maintenance cost and the difficulty of disaster prevention, and seriously threatening the safe operation of the mine, and is not conducive to the use of workers. CONTENT OF THE INVENTION
[0004] The application provides a large-diameter drilling pressure relief device for an elastic area of a large roadway coal pillar to solve the problem of pressure relief of the elastic area of the large roadway coal pillar.
[0005] The application provides a large-diameter drilling pressure relief device for an elastic area of a large roadway coal pillar, which comprises a base and a drill bit, a moving assembly is arranged at the bottom of the base, two symmetrical telescopic sleeves are fixedly connected to the top of the base, telescopic rods are slidably arranged in the telescopic sleeves, and a lifting plate is fixedly connected to the top of the two telescopic rods.
[0006] The lifting plate is fixedly connected to the top of the two telescopic rods, a first motor is fixedly installed at the top of the lifting plate, a rotating shaft is fixedly connected to the output end of the first motor, and the drill bit is fixedly installed on the rotating shaft.
[0007] A lifting assembly is arranged at the top of the base and is used to drive the lifting plate to lift.
[0008] Preferably, the lifting assembly comprises a threaded sleeve, the threaded sleeve is rotatably installed at the top of the base, a threaded rod is threadedly connected to the inside of the threaded sleeve, and the top of the threaded rod is fixedly connected to the bottom of the lifting plate.
[0009] Preferably, the top of the base is fixedly connected with a support frame, the inner wall of the support frame is fixedly installed with a second motor, and the output end of the second motor is fixedly connected with a connecting shaft.
[0010] Preferably, the outer part of the connecting shaft is fixedly connected with a driving gear, the outer part of the threaded sleeve is fixedly connected with a driven gear, and the driving gear and the driven gear are in meshing connection.
[0011] Preferably, the moving assembly comprises four support columns, the four support columns are fixedly installed at the bottom of the base, and the bottom of each of the four support columns is fixedly installed with a universal wheel.
[0012] Preferably, the top of the lifting plate is fixedly connected with a fixing frame, and the rotating shaft extends to the top of the fixing frame.
[0013] Preferably, the support frame and the fixing frame are both in the shape of "n".
[0014] The device has the beneficial effects that when the device is used, the second motor is started, the output end of the second motor drives the connecting shaft and the driving gear to rotate, the driving gear and the driven gear are in meshing connection, the rotation of the driving gear drives the driven gear and the threaded sleeve to rotate, then drives the threaded rod and the lifting plate to move, the height of the drill bit can be adjusted, the lifting plate drives the telescopic rod to slide in the inner part of the telescopic sleeve when moving, so that the lifting plate does not rotate when moving, the first motor is started, the output end of the first motor drives the rotating shaft and the drill bit to rotate, the elastic region of the large roadway coal pillar can be drilled and pressure released, the elastic strain energy in the coal pillar can be released in advance, the risk of sudden damage of the coal pillar caused by stress concentration can be significantly reduced, and the roadway deformation or roof fall accident can be avoided; at the same time, the pressure relief hole can guide the development direction of the fissure, the coal pillar can form stable stress balance in the elastic stage, the bearing life of the coal pillar is prolonged, the long-term safety and stability of the mine roadway is ensured, and the device is especially suitable for the stability control of the coal pillar of a deep high-stress mine, thereby facilitating the use of the staff.
[0015] The above description is only a summary of the technical solutions of the embodiments of the present application, in order to more clearly understand the technical means of the embodiments of the present application, the embodiments of the present application can be implemented according to the content of the specification, and in order to make the above and other purposes, features and advantages of the embodiments of the present application more obvious and easy to understand, the specific embodiments of the present application are described below. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings described in the following are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.
[0017] Figure 1 It is a whole structure schematic view of the large-diameter drilling pressure relief device of the large roadway coal pillar elastic region.
[0018] Figure 2 It is a whole structure sectional view schematic view of the large-diameter drilling pressure relief device of the large roadway coal pillar elastic region.
[0019] Figure 3 It is a whole structure partial schematic view of the large-diameter drilling pressure relief device of the large roadway coal pillar elastic region.
[0020] Figure 4 It is a whole structure schematic view of the large-diameter drilling pressure relief device of the large roadway coal pillar elastic region. Figure 2 It is an enlarged structure schematic view of A in the middle.
[0021] Explanation of reference signs:
[0022] 1, base; 2, support column; 3, universal wheel; 4, telescopic sleeve; 5, telescopic rod; 6, lifting plate; 7, fixing frame; 8, first motor; 9, rotating shaft; 10, drill bit; 11, threaded sleeve; 12, threaded rod; 13, support frame; 14, second motor; 15, connecting shaft; 16, driving gear; 17, driven gear. DETAILED DESCRIPTION
[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present application.
[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification of the application only for the purpose of describing specific embodiments, is not intended to limit the present application; the specification and claims of the present application and the drawing description of the terms "include" and "have" and their any variants, are intended to cover the non-exclusive inclusion.
[0025] Reference to“an embodiment” herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase“in an embodiment” in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all directed to the same embodiment, nor are they necessarily all mutually exclusive or alternative embodiments.
[0026] The positional words appearing in the following description are the directions shown in the drawings, and are not intended to limit the specific structure of the application. For example, in the description of the application, the terms“center”,“longitudinal”,“transverse”,“length”,“width”,“thickness”,“upper”,“lower”,“front”,“rear”,“left”,“right”,“vertical”,“horizontal”,“top”,“bottom”,“inner”,“outer”,“clockwise”,“counterclockwise”,“axial”,“radial”,“circumferential” and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only intended to facilitate the description of the application and simplify the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.
[0027] In the description of the application, it should be noted that, unless otherwise explicitly specified and limited, the terms“mounting”,“connection”,“connection” should be understood broadly, for example, the“connection” or“connection” of mechanical structure can mean physical connection, for example, the physical connection can be fixed connection, for example, fixed connection by fixing member, for example, fixed connection by screw, bolt or other fixing member; the physical connection can also be detachable connection, for example, mutual clamping or clamping connection; the physical connection can also be integrally connected, for example, welding, bonding or integrally formed connection. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.
[0028] In order to enable those skilled in the art to better understand the scheme of the application, the technical solutions in the embodiments of the application will be described clearly and completely in conjunction with the drawings.
[0029] The utility model provides a kind of big roadway coal pillar elastic area's large-diameter drilling pressure-relief device as Figures 1-4 As shown in a kind of big roadway coal pillar elastic area's large-diameter drilling pressure-relief device, including base 1 and drill bit 10, the bottom of base 1 is provided with moving assembly, the top of base 1 is fixedly connected with two symmetrical distribution telescopic sleeves 4, the inside of two telescopic sleeves 4 is slidably installed telescopic rod 5;
[0030] The bottom of the lifting plate 6 is fixedly connected to the top of the two telescopic rods 5, the top of the lifting plate 6 is fixedly installed with the first motor 8, the output end of the first motor 8 is fixedly connected with the rotating shaft 9, and the drill bit 10 is fixedly installed on the rotating shaft 9.
[0031] The lifting assembly is arranged at the top of the base 1 and is used to drive the lifting plate 6 to lift.
[0032] When the large-diameter borehole pressure relief device for the elastic area of the large roadway coal pillar is used, the second motor 14 is started, the output end of the second motor 14 drives the connecting shaft 15 and the driving gear 16 to rotate, the driving gear 16 and the driven gear 17 are meshed and connected, the rotation of the driving gear 16 drives the driven gear 17 and the threaded sleeve 11 to rotate, then drives the threaded rod 12 and the lifting plate 6 to move, at this time the height of the drill bit 10 can be adjusted, when the lifting plate 6 moves, the telescopic rod 5 slides in the telescopic sleeve 4, so that the lifting plate 6 does not rotate when moving, the first motor 8 is started, the output end of the first motor 8 drives the rotating shaft 9 and the drill bit 10 to rotate, at this time the large roadway coal pillar elastic area can be drilled and relieved, the internal elastic strain energy of the coal pillar can be released in advance, the risk of sudden damage of the coal pillar caused by stress concentration can be significantly reduced, and the roadway deformation or roof fall accident can be avoided; at the same time, the pressure relief hole can guide the development direction of the crack, so that the coal pillar forms a stable stress balance in the elastic stage, prolongs the bearing life, ensures the long-term safety and stability of the mine roadway, and is especially suitable for the stability control of the coal pillar of the deep high-stress mine, thereby facilitating the use of the staff.
[0033] Further, the lifting assembly comprises a threaded sleeve 11, the threaded sleeve 11 is rotatably installed at the top of the base 1, and the threaded sleeve 11 is internally threadedly connected with a threaded rod 12, and the top of the threaded rod 12 is fixedly connected to the bottom of the lifting plate 6.
[0034] The threaded sleeve 11 is rotated, then the threaded rod 12 and the lifting plate 6 are moved, and at this time the height of the drill bit 10 can be adjusted.
[0035] Further, the top of the base 1 is fixedly connected with a support frame 13, the inner wall top of the support frame 13 is fixedly installed with a second motor 14, and the output end of the second motor 14 is fixedly connected with a connecting shaft 15.
[0036] The second motor 14 is started, the output end of the second motor 14 drives the connecting shaft 15 and the driving gear 16 to rotate, and the support frame 13 is arranged, so that the second motor 14 does not idle when working.
[0037] Further, the outer part of the connecting shaft 15 is fixedly connected with the driving gear 16, and the outer part of the threaded sleeve 11 is fixedly connected with the driven gear 17, and the driving gear 16 is in meshing connection with the driven gear 17.
[0038] Wherein, since the driving gear 16 is in meshing connection with the driven gear 17, the rotation of the driving gear 16 can drive the driven gear 17 and the threaded sleeve 11 to rotate.
[0039] Further, the moving assembly includes four supporting columns 2, which are fixedly installed at the bottom of the base 1, and the bottom of each supporting column 2 is fixedly installed with a universal wheel 3.
[0040] Wherein, the base 1 can be moved through the setting of the moving assembly.
[0041] Further, the top of the lifting plate 6 is fixedly connected with a fixing frame 7, and the rotating shaft 9 extends to the top of the fixing frame 7.
[0042] Wherein, the fixing frame 7 can make the rotating shaft 9 more stable when rotating.
[0043] Further, the supporting frame 13 and the fixing frame 7 are both "n" shaped.
[0044] Wherein, the supporting frame 13 and the fixing frame 7 are both "n" shaped, so that the stability is improved.
[0045] Working principle: when the large roadway coal pillar elastic region large-diameter drilling pressure relief device is used, the second motor 14 is started, the output end of the second motor 14 drives the connecting shaft 15 and the driving gear 16 to rotate, since the driving gear 16 is in meshing connection with the driven gear 17, the rotation of the driving gear 16 can drive the driven gear 17 and the threaded sleeve 11 to rotate, then drive the threaded rod 12 and the lifting plate 6 to move, at this time the height of the drill bit 10 can be adjusted, when the lifting plate 6 moves, the telescopic rod 5 slides in the inner part of the telescopic sleeve 4, so that the lifting plate 6 does not rotate when moving, the first motor 8 is started, the output end of the first motor 8 drives the rotating shaft 9 and the drill bit 10 to rotate, at this time the large roadway coal pillar elastic region can be drilled and pressure relieved, the internal elastic strain energy of the coal pillar can be released in advance, the risk of sudden damage of the coal pillar due to stress concentration can be significantly reduced, and the roadway deformation or roof fall accident can be avoided; at the same time, the pressure relief hole can guide the development direction of the crack, so that the coal pillar forms stable stress balance in the elastic stage, prolongs the bearing life, ensures the long-term safety and stability of the mine roadway, and is especially suitable for coal pillar stability control of deep high-stress mine, thereby facilitating the use of staff.
[0046] The above-described embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. A large-diameter drilling pressure-relief device for a large-roadway coal-pillar elastic zone, comprising a base (1) and a drill bit (10), characterized in that: The bottom of the base (1) is provided with a moving assembly, the top of the base (1) is fixedly connected with two symmetrically distributed telescopic sleeves (4), the inside of the two telescopic sleeves (4) is slidably installed with telescopic rods (5); A lifting plate (6) is fixedly connected at the top of the two telescopic rods (5), the top of the lifting plate (6) is fixedly installed with a first motor (8), the output end of the first motor (8) is fixedly connected with a rotating shaft (9), and the drill bit (10) is fixedly installed on the rotating shaft (9); A lifting assembly is arranged at the top of the base (1) and is used to drive the lifting plate (6) to lift.
2. The large-diameter borehole pressure-relief device for the elastic zone of a main roadway coal pillar according to claim 1, characterized in that: The lifting assembly comprises a threaded sleeve (11) which is rotatably installed at the top of the base (1), the inside of the threaded sleeve (11) is threadedly connected with a threaded rod (12), and the top of the threaded rod (12) is fixedly connected with the bottom of the lifting plate (6).
3. A large-diameter borehole pressure-relief device for the elastic zone of a coal pillar in a main roadway according to claim 2, characterized in that: The top of the base (1) is fixedly connected with a support frame (13), the inner wall top of the support frame (13) is fixedly installed with a second motor (14), and the output end of the second motor (14) is fixedly connected with a connecting shaft (15).
4. The large-diameter borehole pressure-relief device for the elastic zone of a main gateway coal pillar according to claim 3, characterized in that: The outside of the connecting shaft (15) is fixedly connected with a driving gear (16), the outside of the threaded sleeve (11) is fixedly connected with a driven gear (17), and the driving gear (16) and the driven gear (17) are in meshing connection.
5. The large-diameter borehole pressure relief device for the elastic zone of a main roadway coal pillar according to claim 1, characterized in that: The moving assembly comprises four support columns (2) which are fixedly installed at the bottom of the base (1), and the bottom of each of the four support columns (2) is fixedly installed with a universal wheel (3).
6. A large-diameter borehole pressure-relief device for the elastic zone of a coal pillar in a main roadway according to claim 3, characterized in that: The top of the lifting plate (6) is fixedly connected with a fixing frame (7), and the rotating shaft (9) rotatably extends to the top of the fixing frame (7).
7. A large-diameter borehole pressure-relief device for the elastic zone of a coal pillar of a main roadway according to claim 6, characterized in that: The support frame (13) and the fixing frame (7) are both "n" shaped.