Rotary-cut synergistic stirring device and method for resin anchoring agent

Abstract

According to the rotary-cutting synergistic stirring device and method for the resin anchoring agent, the bag breaking conical head and the metal blades are arranged on the base, the crushing and stirring functions can be achieved, the crushing and stirring effects of the resin anchoring agent are effectively improved, the bonding effect of the resin anchoring agent is enhanced, and then the supporting strength of an anchor rod anchoring system is improved; the device has the advantages of being good in using effect, reasonable and simple in structure, convenient to operate and high in dynamic adaptability.

Description

[Technical field]

[0001] The invention relates to the technical field of mine support, in particular to a resin anchoring agent rotary cutting synergistic stirring device and a method thereof. [Background technology]

[0002] Bolt support technology is widely used in mining and geotechnical engineering for its significant technical and economic advantages. As a commonly used anchoring method in bolt support technology, resin anchor has the advantages of fast load-bearing, high strength, fatigue resistance, strong adaptability, and easy use. However, with the continuous increase in the depth of mine mining, the geological conditions have become more complex and diverse, such as soft rock, high ground stress, loose and broken surrounding rock, which can easily cause problems such as insufficient support strength and even failure of the anchor system. In order to ensure the safety and effectiveness of the anchor system and reduce the safety hazards caused by the failure of the anchor system, higher requirements are put forward for the support strength and effect of the anchor system. Studies have shown that higher prestress can play an important role in improving the stability of the anchor system. In the anchor system, resin anchor, as the main bonding agent between the anchor and the surrounding rock, not only bonds the anchor to the surrounding rock of the anchor hole, but also transmits the stress inside the anchor system to enable the anchor to play a supporting role. Its bonding quality with the surrounding rock is the prerequisite for achieving higher preload and anchoring quality. Stirring the resin anchoring agent with the anchor rod is an important process in the anchoring construction process. The anchoring performance is closely related to the mixing effect of the resin anchoring agent. Therefore, it is of great significance to fully stir and solidify the anchoring agent.

[0003] During anchor support construction, the resin anchor is often broken and stirred only by the anchor rod body. However, due to the structural characteristics of the anchor itself, it is not possible to achieve a good bag breaking and sufficient stirring and mixing effect for the resin anchor. In engineering applications, the resin anchor stirring and mixing effect is often poor, the external plastic packaging is not completely broken, and even the plastic packaging wraps the anchor rod body, resulting in the resin anchor being unable to completely bond the anchor to the surrounding rock, which seriously affects the anchoring quality of the resin anchor. Existing auxiliary devices or components for crushing and enhancing mixing of resin anchor agents, such as: CN202021444982.0 uses a combination of spiral blades and crushing cutter heads, which requires multiple components to be installed at intervals, has a complex structure, low construction efficiency and is easy to clog. The crushing cutter head is a spiral blade, and cannot automatically adjust the cutting depth according to the borehole diameter or resin viscosity, and is prone to chipping in hard rock drilling; CN201910624803.7 requires the installation of three levels of components: front, middle, and rear. The installation is time-consuming and the construction economy is poor; the maximum rotation diameter of the crushing cutter in CN201811510325.9 is equal to the outer diameter of the sleeve, which cannot cover the entire cross-section of the borehole, and the residual packaging bag on the edge causes the "glove phenomenon". To this end, based on this technical background, in view of the common defects of the existing technology such as structural redundancy, poor construction economy, and poor dynamic adaptability, it is urgent to design an auxiliary component with good use effect, reasonable and simple structure, and easy operation, so as to improve the crushing and stirring effect of the resin anchor, enhance the bonding effect of the resin anchor, and thereby improve the support strength of the anchor bolt anchoring system. [Summary of the invention]

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a resin anchor rotary cutting and synergistic stirring device and method thereof. By arranging a bag breaking cone head and metal blades on a base, the crushing and stirring functions can be realized, the crushing and stirring effects of the resin anchor can be effectively improved, the bonding effect of the resin anchor can be enhanced, and the support strength of the anchor rod anchoring system can be improved. The device has the characteristics of good use effect, reasonable and simple structure, easy operation, and high dynamic adaptability.

[0005] The present invention is achieved through the following technical solutions:

[0006] A resin anchoring agent rotary cutting and synergistic stirring device comprises a base 1 for being directly or indirectly connected to an anchor rod body, a bag breaking cone 2 being provided at the front end of the base 1, at least one metal blade 3 being provided on the peripheral wall of the base 1, the root of the metal blade 3 being rotatably connected to the peripheral wall of the base 1, and the metal blade 3 being configured to rotate accordingly with the base 1 during the rotation of the base 1 and to rotate outward relative to the base 1 and to unfold.

[0007] In the above-mentioned resin anchoring agent rotary cutting and synergistic stirring device, the plurality of metal blades 3 are evenly distributed on the peripheral wall of the base 1.

[0008] In the above-mentioned resin anchoring agent rotary cutting and synergistic stirring device, the edge of the metal blade 3 is provided with a blade serrated edge 31.

[0009] In the above-mentioned resin anchoring agent rotary cutting and synergistic stirring device, the metal blade 3 is arranged in an airfoil-shaped streamlined structure, and the thickness and width of the metal blade 3 gradually decrease from the root to the tail.

[0010] In the above-mentioned resin anchoring agent rotary cutting and synergistic stirring device, a blade driving elastic member for assisting the metal blade 3 to rotate and unfold outward is provided between the metal blade 3 and the base 1.

[0011] In the above-mentioned resin anchoring agent rotary cutting and synergistic stirring device, the root of the metal blade 3 is hinged to the base 1 through a hinge.

[0012] In the above-mentioned resin anchoring agent rotary cutting and synergistic stirring device, a blade driving elastic member for assisting the metal blade 3 to rotate and unfold outward is provided in the hinge.

[0013] In the above-mentioned rotary cutting and synergistic stirring device for resin anchoring agent, the bag breaking cone head 2 and the base 1 are an integral structure formed in one piece.

[0014] In the above-mentioned resin anchoring agent rotary cutting and synergistic stirring device, the outer surface of the base 1 is provided with a spiral guide groove 4.

[0015] In the above-mentioned resin anchoring agent rotary cutting and synergistic stirring device, the guiding direction of the spiral guide groove 4 is opposite to the rotation direction of the base 1.

[0016] The present invention also provides an operating method of a resin anchoring agent rotary cutting and synergistic stirring device, using a resin anchoring agent rotary cutting and synergistic stirring device, the stirring device comprises a base 1 for being directly or indirectly connected to an anchor rod body, the front end of the base 1 is provided with a bag breaking cone head 2, the peripheral wall of the base 1 is provided with at least one metal blade 3, the root of the metal blade 3 is rotatably connected to the peripheral wall of the base 1, the metal blade 3 is configured to rotate accordingly with the base 1 during the rotation of the base 1 and rotate outward relative to the base 1 to unfold, and the edge of the metal blade 3 is provided with a blade serrated edge 31; the outer surface of the base 1 is provided with a spiral guide groove 4, and the guide direction of the spiral guide groove 4 is opposite to the rotation direction of the base 1; the operating method comprises the following steps:

[0017] S1, connecting the base 1 to the anchor rod body;

[0018] S2, after the anchor rod body pushes the resin anchor to the bottom of the anchor hole through the stirring device, the bag-breaking cone head 2 pierces the resin anchor packaging bag;

[0019] S3. The drilling rig drives the anchor rod body to drive the base to rotate right, the metal blades are spread out under the centrifugal force, the blade serrated edges cut the residual packaging, and the spiral guide grooves push the resin to form turbulence to achieve full mixing;

[0020] S4. The resin anchor wraps the metal blade. As the resin anchor solidifies, the serrated edge of the metal blade forms a mechanical anchor with the solidified resin. The stirring device and the anchor rod body are bonded together in the borehole to jointly participate in the load-bearing.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] 1. The present invention can realize the crushing and stirring functions by arranging the bag breaking cone head and the metal blades on the base, effectively improving the crushing and stirring effects of the resin anchoring agent, enhancing the bonding effect of the resin anchoring agent, and thus improving the support strength of the anchor bolt anchoring system. It has the characteristics of good use effect, reasonable and simple structure, easy operation, and high dynamic adaptability.

[0023] 2. After the metal blade of the present invention is unfolded, the serrated blade cuts the packaging bag, and at the same time, the metal blade and the spiral guide groove work together to effectively enhance the uniformity of resin mixing.

[0024] 3. The metal blades are configured to rotate accordingly with the base and to rotate outward relative to the base during the rotation of the base, that is, the metal blades can automatically adjust the expansion angle according to the rotation speed of the base to adapt to different drilling sizes.

[0025] 4. The metal blades are arranged in a wing-shaped streamlined structure, which can effectively reduce the resistance of the resin to it.

[0026] 5. The present invention pierces the resin packaging bag with the bag-breaking cone head, and the metal blade performs secondary cutting on the resin packaging bag, which can greatly improve the degree of crushing of the resin packaging bag and avoid the influence of larger packaging bag fragments on the anchoring quality.

[0027] 6. The unfolded metal blades and blade serrated edges of the present invention are embedded in the curing resin to form a mechanical interlock, thereby enhancing the anchoring force; at the same time, the unfolded metal blades can provide effective constraints for the anchor rods during the anchoring agent mixing stage, so that the anchor rods can always be located approximately in the center area of ​​the anchor hole, ensuring that the anchor rods have a good centering effect after being anchored, which is beneficial to the stability of the anchoring system.

Brief Description of the Drawings

[0028] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0029] Figure 1 It is one of the three-dimensional structural schematic diagrams of the present invention.

[0030] Figure 2 This is the second schematic diagram of the three-dimensional structure of the present invention.

[0031] Figure 3 It is a side structural schematic diagram of the present invention.

[0032] Figure 4 It is a schematic diagram of the top structure of the present invention.

[0033] Figure 5 It is a schematic diagram of the present invention when connected with the anchor rod body for use. [Specific implementation method]

[0034] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0035] like Figure 1-5 As shown, the present invention is a resin anchoring agent rotary cutting and synergistic stirring device, comprising a base 1 for being directly or indirectly connected to the anchor rod body, the front end of the base 1 is provided with a bag breaking cone head 2, the peripheral wall of the base 1 is provided with at least one metal blade 3, the root of the metal blade 3 is rotatably connected to the peripheral wall of the base 1, and the metal blade 3 is configured to rotate accordingly with the base 1 during the rotation of the base 1 and rotate outward relative to the base 1 to unfold. The present invention can realize the crushing and stirring functions by arranging the bag breaking cone head and the metal blades on the base, effectively improving the crushing and stirring effects of the resin anchoring agent, enhancing the bonding effect of the resin anchoring agent, and thus improving the support strength of the anchoring system of the anchoring rod, and has the characteristics of good use effect, reasonable and simple structure, easy operation, and high dynamic adaptability.

[0036] In the present invention, the resin anchor wraps the metal blade. As the resin anchor solidifies, the serrated edge of the metal blade forms a mechanical anchor with the solidified resin, so that the stirring device and the anchor rod body are bonded together in the drill hole and jointly participate in the load-bearing, thereby effectively improving the anchoring force.

[0037] like Figure 2 As shown, a threaded connection hole is provided at the rear end of the base 1 for the anchor rod head to be screwed into, so that the installation is convenient and efficient.

[0038] In the present invention, the metal blade 3 is rotated outward relative to the base 1 to expand at an angle ranging from 0° to 90°.

[0039] like Figure 1-4 As shown, in order to improve the stirring stability and effect, the plurality of metal blades 3 are evenly spaced and distributed on the peripheral wall of the base 1. The number of the plurality of metal blades 3 can be 2, 3, 4, 5, etc. In this embodiment, 4 metal blades are used.

[0040] like Figure 1-4 As shown, in order to improve the cutting effect, the edge of the metal blade 3 is provided with a blade serrated edge 31. In order to improve the structural strength, the metal blade 3 is made of 65Mn spring steel.

[0041] In order to effectively reduce the resistance of the resin to the metal blade, the metal blade 3 is arranged in an airfoil streamline structure, and the thickness and width of the metal blade 3 gradually decrease from the root to the tail. Figure 1-4 As shown, the inner surface of the metal blade 3 is a plane, and the outer surface is a cambered surface. The metal blade 3 is 30 mm long, with a thickness of 2.0 mm at the root gradually changing to 0.8 mm at the tail, and a width of 10 mm at the root gradually changing to 8 mm at the tail.

[0042] A blade driving elastic member for assisting the metal blade 3 to rotate outward and unfold is provided between the metal blade 3 and the base 1, which is not shown in the figure and can provide a continuous unfolding torque for the metal blade.

[0043] Preferably, in order to ensure reliable and firm connection and smooth and stable rotation, the root of the metal blade 3 is hinged to the base 1 through a hinge. In this embodiment, the hinge is fixed to the base by micro laser welding.

[0044] The hinge is provided with a blade driving elastic member for assisting the metal blade 3 to rotate outward and unfold, which is not shown in the figure and can provide a continuous unfolding torque for the metal blade. The blade driving elastic member can be a micro torsion spring with a preload torque ≥ 8N·mm.

[0045] In order to improve the structural strength and reduce the number of assembly steps, the bag breaking cone head 2 and the base 1 are formed as an integral structure.

[0046] The outer surface of the base 1 is provided with a spiral guide groove 4, and the guide direction of the spiral guide groove 4 is opposite to the rotation direction of the base 1, forming reverse stirring, which can improve the stirring efficiency. During stirring, the drilling rig drives the anchor rod body to drive the base to rotate right, the metal blades unfold under the centrifugal force, the blade serrated edge cuts the residual packaging, and the spiral guide groove pushes the resin to form turbulence to achieve full mixing. In this embodiment, the spiral guide groove 4 has a groove width of 6mm and a depth of 2-3mm, covering 30mm in the middle and rear section of the base, and the number of circles is 2.

[0047] The invention has an overall length of 60 mm, a weight of less than 200 g, is formed by single-piece casting, has a simple process, and is suitable for mass production.

[0048] The present invention also provides an operating method of a resin anchoring agent rotary cutting and synergistic stirring device, using a resin anchoring agent rotary cutting and synergistic stirring device, the stirring device comprises a base 1 for being directly or indirectly connected to an anchor rod body, the front end of the base 1 is provided with a bag breaking cone head 2, the peripheral wall of the base 1 is provided with at least one metal blade 3, the root of the metal blade 3 is rotatably connected to the peripheral wall of the base 1, the metal blade 3 is configured to rotate accordingly with the base 1 during the rotation of the base 1 and rotate outward relative to the base 1 to unfold, and the edge of the metal blade 3 is provided with a blade serrated edge 31; the outer surface of the base 1 is provided with a spiral guide groove 4, and the guide direction of the spiral guide groove 4 is opposite to the rotation direction of the base 1; the operating method comprises the following steps:

[0049] S1, connecting the base 1 to the anchor rod body;

[0050] S2, after the anchor rod body pushes the resin anchor to the bottom of the anchor hole through the stirring device, the bag-breaking cone head 2 pierces the resin anchor packaging bag;

[0051] S3. The drilling rig drives the anchor rod body to drive the base to rotate right, the metal blades are spread out under the centrifugal force, the blade serrated edges cut the residual packaging, and the spiral guide grooves push the resin to form turbulence to achieve full mixing;

[0052] S4. The resin anchor wraps the metal blade. As the resin anchor solidifies, the serrated edge of the metal blade forms a mechanical anchor with the solidified resin, and the stirring device and the anchor rod body are bonded together in the borehole to jointly participate in the load-bearing. The operation method of the present invention effectively improves the crushing and stirring effect of the resin anchor, enhances the bonding effect of the resin anchor, and further improves the support strength of the anchor system, and has the characteristics of good use effect, reasonable and simple structure, easy operation, and high dynamic adaptability.

Claims

1. A resin anchoring agent rotary cutting synergistic stirring device, characterized in that The invention comprises a base (1) for being directly or indirectly connected to an anchor rod body, wherein a bag-breaking cone head (2) is provided at the front end of the base (1), and at least one metal blade (3) is provided on the peripheral wall of the base (1), wherein the root of the metal blade (3) is rotatably connected to the peripheral wall of the base (1), and the metal blade (3) is configured to rotate accordingly with the base (1) during the rotation of the base (1) and to rotate outward relative to the base (1) and to unfold.

2. A resin anchoring agent rotary cutting synergistic stirring device according to claim 1, characterized in that The plurality of metal blades (3) are evenly spaced and distributed on the peripheral wall of the base (1).

3. A resin anchoring agent rotary cutting synergistic stirring device according to claim 1, characterized in that The edge of the metal blade (3) is provided with a blade serrated edge (31).

4. A resin anchoring agent rotary cutting synergistic stirring device according to claim 1, characterized in that The metal blade (3) is arranged in an airfoil-shaped streamlined structure, and the thickness and width of the metal blade (3) gradually decrease from the root to the tail.

5. The resin anchoring agent rotary cutting synergistic stirring device according to claim 1, characterized in that A blade driving elastic member for assisting the metal blade (3) to rotate and unfold outward is provided between the metal blade (3) and the base (1).

6. The resin anchoring agent rotary cutting synergistic stirring device according to claim 1, characterized in that The root of the metal blade (3) is hinged to the base (1) via a hinge.

7. A resin anchoring agent rotary cutting synergistic stirring device according to claim 6, characterized in that A blade driving elastic member for assisting the metal blade (3) to rotate outward and unfold is arranged in the hinge.

8. The resin anchoring agent rotary cutting synergistic stirring device according to claim 1, characterized in that The bag breaking cone head (2) and the base (1) are an integral structure formed in one piece.

9. A resin anchoring agent rotary cutting synergistic stirring device according to any one of claims 1 to 8, characterized in that The outer surface of the base (1) is provided with a spiral guide groove (4), and the guide direction of the spiral guide groove (4) is opposite to the rotation direction of the base (1).

10. An operating method of a resin anchoring agent rotary cutting synergistic stirring device, characterized in that A resin anchoring agent rotary cutting and synergistic stirring device is used, the stirring device comprising a base (1) for being directly or indirectly connected to the anchor rod body, the front end of the base (1) is provided with a bag breaking cone head (2), the peripheral wall of the base (1) is provided with at least one metal blade (3), the root of the metal blade (3) is rotatably connected to the peripheral wall of the base (1), the metal blade (3) is configured to rotate with the base (1) during the rotation of the base (1) and rotate outward relative to the base (1) to unfold, and the edge of the metal blade (3) is provided with a blade serrated edge (31); the outer surface of the base (1) is provided with a spiral guide groove (4), the guide direction of the spiral guide groove (4) is opposite to the rotation direction of the base (1); the operation method comprises the following steps: S1, connecting the base (1) to the anchor rod body; S2, after the anchor rod body pushes the resin anchoring agent to the bottom of the anchor hole through the stirring device, the bag-breaking cone head (2) pierces the resin anchoring agent packaging bag; S3. The drilling rig drives the anchor rod body to drive the base to rotate right, the metal blades are spread out under the centrifugal force, the blade serrated edges cut the residual packaging, and the spiral guide grooves push the resin to form turbulence to achieve full mixing; S4. The resin anchor wraps the metal blade. As the resin anchor solidifies, the serrated edge of the metal blade forms a mechanical anchor with the solidified resin. The stirring device and the anchor rod body are bonded together in the borehole to jointly participate in the load-bearing.

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