Strip mine deep hole flexible supporting device and using method thereof

Abstract

The invention discloses a strip mine deep hole flexible supporting device and a using method thereof.The strip mine deep hole flexible supporting device comprises a supporting plate body and fixing rods, the supporting plate body is made of polyethylene glycol terephthalate, and a lead clamping groove is formed in the top of the supporting plate body; the supporting plate body is further provided with a first buckle notch set and a second buckle notch set. The first buckle notch group and the second buckle notch group respectively comprise a first buckle notch and a second buckle notch; the width of the supporting plate body needs to meet pi Dlt; blt; 1.5 pi Dj; a lifting seam is further formed in the supporting plate body; the fixing rod comprises a rod body transverse part and a rod body vertical part, the rod body vertical part is provided with a first limiting hinge, the first limiting hinge is provided with a first clamping ball, and the first clamping ball is sequentially connected to the first buckle notch and the second buckle notch in a clamped mode. The supporting plate body is tightly attached to the hole wall of the blast hole and provides active supporting with additional prestress, and the situation that the depth of the blast hole is insufficient or the interior of the blast hole is blocked due to surface scum and collapse of loose rock blocks in the hole wall of the blast hole is effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of open-pit mining, and more particularly to an open-pit mine deep-hole flexible support device and a method of using the same. Background Art

[0002] The drilling operation is the first process in open-pit production, accounting for 10% to 15% of the mining production cost, and directly affects the production efficiency and blasting quality of the blasting process.

[0003] See also Figure 1 As shown, Figure 1 This is a background diagram of the corresponding surface fracture zone and multiple blastholes in the existing technology; in open-pit bench blasting, the most typical problems are lost holes, repeated drilling, and secondary holes. The reasons are as follows: First, during the drilling operation, the mud liquid mixed with bottom rock debris and water is blown out, which repeatedly flushes the explosive fracture section and primary fracture development zone generated by the previous level of ultra-deep blasting in the hole wall, causing a large number of fragments in the wall to fall into the bottom of the hole, resulting in insufficient hole depth, and even collapse to form an ellipsoidal cavity, causing the cross section to be too large. However, the slag discharge wind speed is insufficient, which eventually leads to the failure to discharge the rock slag, resulting in the abandonment of the blasthole and the jamming of the drill; secondly, before the blasting operation, the large amount of slag layer on the surface of the hole mouth and the loose rock in the hole wall are easily affected by strong winds, rain erosion, charging trolley rolling and surrounding blasting disturbances. A large amount of rock slag and boulders collapse, filling the bottom and clogging the middle of the standard hole that originally met the requirements. It is necessary to drill again and re-drill around the hole, which seriously affects the process connection, production efficiency and blasting quality. Therefore, it is a technical problem that needs to be solved urgently in this field.

[0004] Chinese patent document (application number: 2019217987061, application date: 2019.10.24) discloses a retractable and stretchable open-pit mine bench deep hole blasting protection device, such as Figure 2 As shown, Figure 2This is a structural schematic diagram of a deep-hole blasting protection device for an open-pit mine step provided by a Chinese patent document. The deep-hole blasting protection device for an open-pit mine step includes a plastic sleeve. A cutting seam 4-2' is provided along the central axis of the plastic sleeve. A contraction-extension manual release unit is also provided on the outer wall of the plastic sleeve. The contraction-extension manual release unit includes a tightening wire 4-3' and a tightening wire unit. The tightening wire units are evenly distributed from top to bottom along the outer wall of the plastic sleeve. The tightening wire units are wrapped around the outer wall of the plastic sleeve and tightened in a slipknot manner; one end of the tightening wire 4-3' is connected to the pull ring 4-1', and the other end of the tightening wire 4-3' is connected to the slipknot tightening part of the tightening wire unit. There are three tie-line units, which include an upper tie-line 4-4', a middle tie-line 4-5' and a lower tie-line 4-6' from top to bottom along the outer wall of the plastic sleeve. This solution has the following disadvantages: First, since the plastic sleeve is made of PVC pipe, it has a high hardness. Even if a cutting seam 4-2' is opened on the plastic sleeve, its flexibility is still limited and it cannot fully fit with the hole wall to provide sufficient prestress; second, the aperture of the open-air step blasting hole is not an ideal cylindrical shape, but mostly a truncated cone with a larger top and a smaller bottom, and its diameter varies greatly in different areas. The shape of the sleeve 4' is relatively simple and has limited deformation; third, the main function of the tie-line 4-3' is to release the restraint of the tie-line unit by pulling upwards. The tie-line 4-3' is only applicable to rigid plastic sleeves during the release process of pulling upwards, and is prone to bending and deformation of flexible plastic sleeves, making it difficult to remove the flexible plastic sleeves. Summary of the Invention

[0005] In view of this, the present invention provides a flexible support device for deep holes in open-pit mines, which is used to solve typical problems such as missed holes, repeated holes, and inferior holes in drilling operations, and to avoid the problem of mud liquid scouring the hole wall during the drilling and slag removal process to cause cavities and the inflow of slag on the hole surface and the collapse of hole wall fragments to cause poor blast holes.

[0006] In a first aspect, the present application provides a flexible support device for deep holes in open-pit mines, comprising a rectangular or fan-shaped support plate and a fixing rod, wherein the support plate is made of polyethylene terephthalate,

[0007] A lead slot is provided on the top of the support plate body, and the lead slot is recessed toward the geometric center of the support plate body; along the length direction of the support plate body, a first snap cutout group and a second snap cutout group are also provided on the support plate body in parallel, the first snap cutout group is located near the lead slot, and the second snap cutout group is located near the bottom of the support plate body;

[0008] Along the width direction of the support plate body, the first snap cutout group and the second snap cutout group respectively include a parallel first snap cutout and a second snap cutout, the first snap cutout and the second snap cutout penetrate the support plate body along the thickness direction of the support plate body, the first snap cutout and the second snap cutout are circular in shape, the center of the first snap cutout and the center of the second snap cutout are located on the same horizontal line, the center of the first snap cutout in the first snap cutout group and the center of the first snap cutout in the second snap cutout group, the center of the second snap cutout in the first snap cutout group and the center of the second snap cutout in the second snap cutout group are respectively located on the same horizontal line, and are perpendicular to each other along the thickness direction of the support plate body, along the width direction of the support plate body and along the length direction of the support plate body;

[0009] Along the width direction of the support plate, the distance between the center of the first buckle cutout and the center of the second buckle cutout is πD j , along the width direction of the support plate, the distance from the center of the first buckle cutout to the edge of the support plate is πD, and the width of the support plate must satisfy πD <B<1.5πD j ;

[0010] The support plate body is also provided with a lifting seam, which penetrates the support plate body along the thickness direction of the support plate body. The lifting seam is in the shape of a semi-ellipse, and the opening of the lifting seam faces the top of the support plate body. Along the length direction of the support plate body, the lifting seam is located between the lead slot and the first buckle cutout group;

[0011] The fixing rod includes a horizontal portion of the rod body and a vertical portion of the rod body connected to the horizontal portion of the rod body, and a T-shaped structure is formed between the horizontal portion of the rod body and the vertical portion of the rod body. The length extension direction of the vertical portion of the rod body is the same as the length extension direction of the support plate body, and the vertical portion of the rod body extends along the length direction of the support plate body. The vertical portion of the rod body is provided with a first limiting hinge corresponding to the first snap cut and the second snap cut. The first limiting hinge is provided with a first clamping ball matching the first snap cut and the second snap cut on the side away from the vertical portion of the rod body. When the support plate body is bent along the circumferential direction to form a cylindrical structure, the first clamping ball is sequentially clamped in the first snap cut and the second snap cut, and the first limiting hinge drives the first clamping ball to rotate toward the side close to the horizontal portion of the rod body.

[0012] In a second aspect, the present application further provides a method for using an open-pit mine deep hole flexible support device, wherein the open-pit mine deep hole flexible support device is used for drilling, and the open-pit mine deep hole flexible support device includes the open-pit mine deep hole flexible support device described above;

[0013] S1. When the drilling equipment passes through the surface fracture zone for at least 1 meter, the drilling is stopped but the slag is continued to be discharged to form a blasthole. The drilling equipment includes a drill bit and a drill rod connected to the drill bit; S2. The support plate is first rolled around the drill rod into a cylindrical structure, and then the first clamping ball on the fixing rod is sequentially clamped to the first clamping cut and the second clamping cut, the fixing rod is fixed on the drill rod, and then the rolled cylindrical structure is sent into the blasthole; S3. The cylindrical structure moves downward along the drill rod until the cylindrical structure is exposed 0.5 meters above the ground surface. One hand grasps the lifting seam, and the other hand pushes the fixing rod down with force until the first clamping ball is disengaged from the first clamping cut and the second clamping cut. When the cylindrical structure is fully opened and fully contacts the wall of the corresponding blasthole, the fixing rod is removed; S4. The drilling equipment is restarted until the entire blasthole is completed;

[0014] S5, looping steps S1 to S5 until all blastholes are equipped with cylindrical structures; S6, placing the assembled detonating bomb and detonator into the blasthole, placing the detonator lead into the lead slot, and after the charge is completed in the blasthole, taking out the cylindrical structure.

[0015] Compared with the prior art, the open-pit mine deep hole flexible support device and its use method provided by the present invention achieve at least the following beneficial effects:

[0016] First, the open-pit mine deep hole flexible support device provided by this embodiment has a support plate body that fits tightly with the hole wall of the blasthole and provides active support with additional prestress, which effectively avoids the collapse of surface slag and loose rock blocks in the hole wall of the blasthole, causing insufficient blasthole depth or blockage in the blasthole; the support plate body has good flexibility and can be recycled and reused repeatedly, with low overall cost, and is easy to recycle and transport, occupies a small area, and has little impact on blasting construction; second, after the support plate body is rolled into a cylindrical structure and fixed in the blasthole, the first clamping ball of the fixing rod can be released. When recycling, it is only necessary to roll the support plate body to easily pull it out and the detonator line can pass through the lead slot on the edge of the stretched support plate body, and at the same time, it can be rolled around the drill hole and placed in the blasthole to be drilled in advance. , which solves the problem of difficulty in hole formation caused by repeated scouring of the hole wall by a mixture of rock slag and water; in addition, the open-pit mine deep hole flexible support device is simple and convenient to use, and only one rolled cylindrical structure is needed in each blasthole, which reduces costs; before removing the fixed rod, pressing down makes the first clamping ball disengage from the first clamping cut and the second clamping cut to avoid bending of the support plate body, which is conducive to the removal of the support plate body; third, the support plate body can not only completely wrap the hole wall of the blasthole, but also avoid excessive overlapping of the rolled cylindrical structure, saving costs; fourth, it is of great significance to improving the penetration quality of drilling equipment and improving the open-pit step blasting effect, and it also has economic and social value in improving open-pit mining efficiency, saving ore mining costs and ensuring the safety of blasting operations.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the above technical effects at the same time.

[0018] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0020] Figure 1 It is a background schematic diagram of the surface fracture zone corresponding to multiple blastholes in the prior art;

[0021] Figure 2 This is a schematic diagram of the structure of a deep hole blasting protection device for open pit benches provided by a Chinese patent document;

[0022] Figure 3 This is a schematic structural diagram of a deep hole flexible support device for open pit mines provided by the present invention;

[0023] Figure 4 This is a structural schematic diagram of a support plate provided by the present invention in an unfolded state;

[0024] Figure 5 This is a structural schematic diagram of another support plate provided by the present invention in an expanded state;

[0025] Figure 6 This is a structural schematic diagram of a fixing rod provided by the present invention in one direction;

[0026] Figure 7 yes Figure 6 Enlarged view of point A in the middle;

[0027] Figure 8 This is a structural schematic diagram of a fixing rod provided by the present invention in another direction;

[0028] Figure 9 yes Figure 7 Sectional view of the middle section B-B';

[0029] Figure 10 yes Figure 9 Schematic diagram of the use status when the middle fixing rod is pressed downward;

[0030] Figure 11 This is a schematic diagram of the open-pit mine deep hole flexible support device provided by the present invention in use state when it is not in contact with the hole wall of the blast hole;

[0031] Figure 12 This is a schematic diagram of another open-pit mine deep hole flexible support device provided by the present invention being used in contact with the hole wall of the blast hole;

[0032] Figure 13 This is a schematic structural diagram of another support plate provided by the present invention in an expanded state;

[0033] Figure 14 This is a schematic structural diagram of another support plate provided by the present invention in an expanded state;

[0034] Figure 15 This is a structural schematic diagram of another fixing rod provided by the present invention in another direction;

[0035] Figure 16 This is a flow chart of a method for using a deep hole flexible support device for an open-pit mine provided by the present invention;

[0036] Figure 17 This is a schematic diagram of the assembly of a deep hole flexible support device for open pit mines provided by the present invention;

[0037] Figure 18 The invention provides a deep hole flexible support device for open pit mines. Figure 1 An enlarged view of the blast hole at point C in the middle. DETAILED DESCRIPTION

[0038] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0039] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0040] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0041] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0042] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0043] See also Figure 3-Figure 12 As shown, Figure 3 This is a schematic structural diagram of a deep hole flexible support device for open pit mines provided by the present invention; Figure 4This is a structural schematic diagram of a support plate provided by the present invention in an unfolded state; Figure 5 This is a structural schematic diagram of another support plate provided by the present invention in an expanded state;

[0044] Figure 6 This is a structural schematic diagram of a fixing rod provided by the present invention in one direction; Figure 7 yes Figure 6 Enlarged view of point A in the middle; Figure 8 This is a structural schematic diagram of a fixing rod provided by the present invention in another direction; Figure 9 yes Figure 7 Sectional view of the middle section B-B'; Figure 10 yes Figure 9 Schematic diagram of the use status when the middle fixing rod is pressed downward; Figure 11 This is a schematic diagram of the open-pit mine deep hole flexible support device provided by the present invention in use state when it is not in contact with the hole wall of the blast hole; Figure 12 This is a schematic diagram of another open-pit mine deep hole flexible support device provided by the present invention, which is in use and fits the hole wall of the blast hole. This embodiment provides an open-pit mine deep hole flexible support device, including a rectangular or fan-shaped support plate body 1 and a fixing rod 2. The support plate body 1 is made of polyethylene terephthalate, wherein:

[0045] A lead slot 11 is provided on the top of the support plate body 1, and the lead slot 11 is recessed toward the geometric center of the support plate body 1; along the length direction of the support plate body 1, a first snap cutout group 12 and a second snap cutout group 13 are also provided on the support plate body 1 in parallel, with the first snap cutout group 12 being located near the side of the lead slot 11, and the second snap cutout group 13 being located near the bottom of the support plate body 1;

[0046] Along the width direction of the support plate body 1, the first snap cutout group 12 and the second snap cutout group 13 respectively include a parallel first snap cutout 120 and a second snap cutout 121. The first snap cutout 120 and the second snap cutout 121 penetrate the support plate body 1 along the thickness direction of the support plate body 1. The first snap cutout 120 and the second snap cutout 121 are circular in shape, and the center of the first snap cutout 120 and the center of the second snap cutout 121 are located at the same On a horizontal line, the center of the first snap cutout 120 in the first snap cutout group 12 and the center of the first snap cutout 120 in the second snap cutout group 13, as well as the center of the second snap cutout 121 in the first snap cutout group 12 and the center of the second snap cutout 121 in the second snap cutout group 13 are respectively located on the same horizontal line, and are perpendicular to each other along the thickness direction of the support plate body 1, along the width direction of the support plate body 1, and along the length direction of the support plate body 1;

[0047] Along the width direction of the support plate body 1, the distance between the center of the first buckle cutout 120 and the center of the second buckle cutout 121 is πDj , along the width direction of the support plate body 1, the distance from the center of the first buckle cutout 120 to the edge of the support plate body 1 is πD, and the width of the support plate body 1 must satisfy πD <B<1.5πD j ;

[0048] The support plate body 1 is further provided with a lifting seam 14, which penetrates the support plate body 1 along the thickness direction of the support plate body 1. The lifting seam 14 is semi-elliptical in shape, and the opening of the lifting seam 14 faces the top of the support plate body 1. Along the length direction of the support plate body 1, the lifting seam 14 is located between the lead slot 11 and the first buckle cutout group 12;

[0049] The fixing rod 2 includes a horizontal portion 21 of the rod body and a vertical portion 22 of the rod body connected to the horizontal portion 21 of the rod body. A T-shaped structure is formed between the horizontal portion 21 of the rod body and the vertical portion 22 of the rod body. The length extension direction of the vertical portion 22 of the rod body is the same as the length extension direction of the support plate body 1. The vertical portion 22 of the rod body extends along the length direction of the support plate body 1. The vertical portion 22 of the rod body is provided with a first limiting hinge 23 corresponding to the first snap cut 120 and the second snap cut 121. The first limiting hinge 23 is provided with a first clamping ball 24 matching the first snap cut 120 and the second snap cut 121 on the side away from the vertical portion 22 of the rod body. When the support plate body 1 is bent along the circumferential direction to form a cylindrical structure, the first clamping ball 24 is sequentially clamped in the first snap cut 120 and the second snap cut 121. The first clamp is provided with a first limiting member on the side away from the horizontal portion 21 of the rod body, and the first limiting hinge 23 drives the first clamping ball 24 to rotate toward the side close to the horizontal portion 21 of the rod body.

[0050] Specifically, continue to refer to Figure 3 As shown, the open-pit mine deep hole flexible support device can be a recyclable open-pit mine deep hole flexible support device, the open-pit mine deep hole flexible support device includes a support plate body 1 and a fixing rod 2, the shape of the support plate body 1 can be rectangular, such as Figure 4 As shown, it can also be fan-shaped, such as Figure 5 As shown, this embodiment does not make any specific limitation to this. The fixing rod 2 can be a T-shaped fixing rod, which is convenient for the operator to take later.

[0051] The above-mentioned polyethylene terephthalate (PET) as the material of the support plate body 1 has high tensile strength and bending strength, and can withstand greater mechanical stress; it has good wear resistance and fatigue resistance, and can maintain good performance during repeated use, reducing wear and damage; it has good thermal stability, and can maintain its performance within a certain temperature range. It is a highly recyclable material, which helps to reduce waste, promote environmental protection and sustainable development; it has good transparency and glossiness, so that when it is necessary to observe the internal situation of the support plate body 1, the internal structure and status can be seen more clearly, which is convenient for inspection and maintenance; it can be understood that: the support plate body 1 has good flexibility, can be recycled and used repeatedly, has a low overall cost, is easy to recycle and transport, occupies a small area, and has little impact on blasting construction.

[0052] Continue to refer to Figure 4 As shown, a lead slot 11 can be opened at the top center of the support plate body 1. The lead slot 11 is recessed toward the geometric center of the support plate body 1. The lead slot 11 can be in the shape of a rectangular slot. The lead slot 11 is used to connect the detonator line.

[0053] Combine Figure 4 and Figure 5 As shown, along the length direction of the support plate body 1, a parallel first snap cut group 12 and a second snap cut group 13 are also provided on the support plate body 1. The first snap cut group 12 is located at the upper part of the support plate body 1, and the second snap cut group 13 is located at the lower part of the support plate body 1. When used subsequently, the support plate body 1 is rolled into a cylindrical structure, and the first snap ball 24 on the fixing rod 2 is respectively snapped into the first snap cut 120 and the second snap cut 121 of the first snap cut group 12 and the second snap cut group 13, so as to more firmly connect the fixing rod 2 and the support plate body 1 together.

[0054] The first snap cutout 120 and the second snap cutout 121 are each circular in shape, and each of the first snap cutout 120 and the second snap cutout 121 is a circular hole. Depending on the actual situation, the first snap cutout 120 and the second snap cutout 121 can also be designed as a rectangle, an ellipse, a fan, a diamond, etc. This embodiment only uses the first snap cutout 120 and the second snap cutout 121 as an example of a circle. The structures of the first snap cutout 120 and the second snap cutout 121 are completely identical, such as the diameter of the first snap cutout 120 and the diameter of the second snap cutout 121 are equal. The first snap cutout 120 and the second snap cutout 121 penetrate the support plate body 1 along the thickness direction of the support plate body 1, and the first snap cutout 120 and the second snap cutout 121 are circular through holes. Along the width direction of the support plate body 1, there is a distance between the first snap cutout 120 and the second snap cutout 121.

[0055] Continue to refer to Figure 4 and Figure 5 As shown, the center of the first snap cut 120 in the first snap cut group 12 and the center of the second snap cut 121 in the first snap cut group 12 are located on the same horizontal line, the center of the first snap cut 120 in the second snap cut group 13 and the center of the second snap cut 121 in the second snap cut group 13 are located on the same horizontal line, the center of the first snap cut 120 in the first snap cut group 12 and the center of the first snap cut 120 in the second snap cut group 13, the center of the second snap cut 121 in the first snap cut group 12 and the center of the second snap cut 121 in the second snap cut group 13 are respectively located on the same horizontal line, which can be understood as: the center of the first snap cut 120 in the first snap cut group 12 , the center of the second snap cut 121 in the first snap cut group 12, the center of the second snap cut 121 in the second snap cut group 13 and the center of the first snap cut 120 in the second snap cut group 13 form a rectangle. After the support plate body 1 is rolled up, the center of the first snap cut 120 in the first snap cut group 12 overlaps with the center of the second snap cut 121 in the first snap cut group 12, and the center of the first snap cut 120 in the second snap cut group 13 overlaps with the center of the second snap cut 121 in the second snap cut group 13, so that the first snap ball 24 on the fixing rod 2 is sequentially snapped into the first snap cut 120 and the second snap cut 121 in the first snap cut group 12 and the second snap cut group 13.

[0056] Along the width direction of the support plate body 1, the horizontal distance between the center of the first snap cutout 120 and the center of the second snap cutout 121 in the first snap cutout group 12 and the second snap cutout group 13 is πD j Along the width direction of the support plate body 1, the distance from the center of the first snap cutout 120 to the edge of the support plate body 1 is πD. The edge of the support plate body 1 can be the edge on the side close to the second snap cutout 121. If the width B of the support plate body 1 is too narrow, the support plate body 1 cannot completely wrap the hole wall of the blasthole 4 after being unfolded. If the width B of the support plate body 1 is too wide, the cylindrical structure after rolling will overlap too much. Therefore, in this embodiment, the width B of the support plate body 1 needs to satisfy the following expression: πD <B<1.5πD j , that is, the width B of the support plate body 1 and the diameter D of the blast hole 4 and the curling diameter D j This makes the support plate body 1 better match the blast hole 4.

[0057] A lifting seam 14 is also provided on the support plate body 1. A lifting seam 14 with a palm-sized opening facing upward is pre-cut on the unrolled support plate body 1. The lifting seam 14 can be a semi-elliptical seam. The long axis of the semi-elliptical seam is parallel to the width direction of the support plate body 1 and perpendicular to the length direction of the support plate body 1. The opening of the semi-elliptical seam is toward the top of the support plate body 1. The semi-elliptical seam is convenient for the operator to hold the support plate body 1 in his hand, and it is also convenient to take the support plate body 1 later.

[0058] Continue to refer to Figure 6-Figure 9 As shown, the fixing rod 2 includes a horizontal portion 21 and a vertical portion 22. The horizontal portion 21 and the vertical portion 22 are both round rods. The length of the vertical portion 22 extends in the same direction as the length of the support plate body 1, and the length of the vertical portion 22 is the same as or similar to the length of the support plate body 1. The length of the horizontal portion 21 extends in the same direction as the width of the support plate body 1, and a T-shaped structure is formed between the horizontal portion 21 and the vertical portion 22. The length of the horizontal portion 21 along the width direction of the support plate body 1 is less than the length of the vertical portion 22 along the length direction of the support plate body 1.

[0059] The vertical portion 22 of the rod body is connected to a first limit hinge 23 corresponding to the first and second limit notches 120 and 121 in the first and second limit notches 12 and 13. The first limit hinge 23 is used to achieve a 40° to 60° limit rotation of the first locking ball 24. For example, the first limit hinge 23 is used to achieve a 40°, 45°, or 60° limit rotation of the first locking ball 24. The first limit hinge 23 is connected to the side away from the vertical portion 22 of the rod body. The shape and structure of the first locking ball 24 match the shape and structure of the first and second lock notches 120 and 121, such as a circle. The above-mentioned first limit hinge 23 can be a 90° limit hinge, and its model can be BOS-11-122. Of course, other models of limit hinges can also be used according to actual conditions, and this embodiment does not specifically limit this.

[0060] Continue to refer to Figure 6-Figure 12 As shown, when the first limiting hinge 23 lifts the cylindrical structure into the blasthole 4, the vertical portion 22 of the rod body and the first retaining ball 24 rotate at a limited angle of 40° to 60°, providing an effective pulling force. Because the first limiting hinge 23 can drive the first retaining ball 24 to rotate toward the side close to the horizontal portion 21 of the rod body, after the cylindrical structure is placed in the predetermined position, the cylindrical structure is lifted and the fixed rod 2 is pressed downward, and the first limiting hinge 23 rotates upward to facilitate the extraction of the first retaining ball 24 from the first retaining notch 120 and the second retaining notch 121. The diameter of the first retaining ball 24 can be 1 mm larger than the diameter of the first retaining notch 120 and the second retaining notch 121.

[0061] The fixing rod 2 can be made of metal, plastic, carbon fiber, or glass fiber. Metal has the characteristics of high strength, durability, and processability. Specifically, metal (such as stainless steel, aluminum alloy, etc.) usually has high strength and can withstand large tension, pressure, and impact. Plastic is much lighter than metal and can significantly reduce the weight of the fixing rod 2. Plastic is relatively cheap and has low processing costs. Carbon fiber is a high-performance composite material with extremely high strength and rigidity while being very light. Glass fiber has high strength and modulus, can withstand large loads, and is relatively light. The above materials can be selected according to actual conditions.

[0062] Compared with the prior art, the open-pit mine deep hole flexible support device provided in this embodiment achieves at least the following beneficial effects:

[0063] First, the open-pit mine deep hole flexible support device provided by this embodiment has a support plate body 1 that is tightly attached to the hole wall of the blasthole 4 and provides active support with additional prestress, effectively preventing the collapse of surface slag and loose rock blocks in the hole wall of the blasthole 4, which may cause insufficient depth of the blasthole 4 or blockage in the blasthole 4; the support plate body 1 has good flexibility and can be recycled and reused multiple times, with low overall cost, easy recycling and transportation, small footprint, and little impact on blasting construction;

[0064] Second, after the support plate body 1 is rolled into a cylindrical structure and fixed in the blast hole 4, the first clamping ball 24 of the fixing rod 2 can be released. When recovering, it is only necessary to roll the support plate body 1 to easily pull it out and the detonator line can pass through the lead clamping groove 11 on the edge of the stretched support plate body 1. At the same time, it can be rolled around the drill hole and placed in the blast hole 4 to be drilled in advance, solving the problem of difficulty in drilling caused by repeated washing of the hole wall by the mixed slurry of rock slag and water; in addition, the open-pit mine deep hole flexible support device is simple and convenient to use, and only one rolled cylindrical structure is needed in each blast hole, which reduces costs; before taking out the fixing rod 2, press downward to make the first clamping ball 24 disengage from the first clamping cut 120 and the second clamping cut 121 to avoid bending of the support plate body 1, which is conducive to the removal of the support plate body 1.

[0065] Third, the support plate body 1 can not only completely wrap the hole wall of the blasthole 4, but also avoid excessive overlap of the cylindrical structure after rolling, thus saving costs;

[0066] Fourth, it is of great significance to improve the drilling quality of drilling equipment and improve the effect of open-pit step blasting. It also has economic and social value in improving open-pit mining efficiency, saving ore mining costs and ensuring the safety of blasting operations.

[0067] In an alternative embodiment, continue to refer to Figure 8 and Figure 9As shown, the first limit hinge 23 includes a first fixed page rod 231, a first movable page rod 232 and a first rotating shaft 233. The first fixed page rod 231 is connected to the first movable page rod 232 through the first rotating shaft 233. The first fixed page rod 231 is fixedly connected to the vertical portion 22 of the rod body, and the first movable page rod 232 is fixedly connected to the first locking ball 24. When the first movable page rod 232 rotates around the first rotating shaft 233, it drives the first locking ball 24 to rotate toward or away from the side of the horizontal portion 21 of the rod body.

[0068] Specifically, the first fixed page rod 231 can be welded to the vertical portion 22 of the rod body, and the first movable page rod 232 can be welded to the first locking ball 24 on the side away from the first rotating shaft 233. The first fixed page rod 231 is rotatably connected to the first movable page rod 232 via the first rotating shaft 233 to ensure the stability of the support plate body 1 during use. Of course, according to actual conditions, the first fixed page rod 231 can also be bonded to the vertical portion 22 of the rod body, and the first movable page rod 232 can also be bonded to the first locking ball 24. As long as the first fixed page rod 231 can be connected to the vertical portion 22 of the rod body, and the first movable page rod 232 can be connected to the first locking ball 24 on the side away from the first rotating shaft 233, this embodiment does not make any specific restrictions on this.

[0069] The first rotating shaft 233 can be a cylindrical shaft, which passes through the corresponding holes on the first fixed page rod 231 and the first movable page rod 232. The first movable page rod 232 can rotate freely around the first rotating shaft 233. This connection method ensures that the first movable page rod 232 will not separate from the first fixed page rod 231 during rotation, while allowing it to rotate between 40° and 60°.

[0070] When the operator presses down the vertical part 22 of the fixed rod 2 with force, the first movable leaf rod 232 will drive the first locking ball 24 to rotate upward 40° to 60°, making it easier for the first locking ball 24 to be pulled out from the first locking cut 120 and the second locking cut 121 of the support plate body 1. The support plate body 1 can then be taken out, cleaned, and reused.

[0071] In an alternative embodiment, continue to refer to Figure 4 and Figure 5 As shown, along the width direction of the support plate body 1, the lifting seam 14 includes a parallel first lifting seam 141 and a second lifting seam 142. Along the length direction of the support plate body 1, the orthographic projection of the first lifting seam 141 does not overlap with the orthographic projection of the first buckle incision 120 at all; the orthographic projection of the second lifting seam 142 overlaps with the orthographic projection of the second buckle incision 121.

[0072] Specifically, the first lifting seam 141 and the second lifting seam 142 are respectively two palm-sized semi-elliptical seams with openings facing upwards. The first lifting seam 141 and the second lifting seam 142 are both used for lifting operations. The first lifting seam 141 and the second lifting seam 142 are designed in parallel, so that the operator can apply force more evenly when lifting the support plate body 1, reducing deformation or damage of the support plate body 1 caused by uneven force, and improving the convenience and efficiency of operation.

[0073] Since the orthographic projection of the first lifting seam 141 and the orthographic projection of the first snap cut 120 do not overlap at all along the length direction of the support plate body 1, it is ensured that the first lifting seam 141 will not interfere with the first snap cut 120 during the lifting process, thereby ensuring the stability and reliability of the support plate body 1 during lifting, avoiding mutual interference during operation, and ensuring that the support plate body 1 can be smoothly unfolded or retracted.

[0074] Since the orthographic projection of the second lifting seam 142 overlaps with the orthographic projection of the second buckle cutout 121, the flexibility and diversity of operation are increased. For example, when installing or removing the support plate body 1, the overlapping portion can provide an additional gripping point or fixing point to facilitate the operator's operation.

[0075] In an alternative embodiment, continue to refer to Figure 11 and Figure 12 As shown, the thickness of the support plate body 1 is proportional to the diameter of the blasthole 4.

[0076] Specifically, the thickness d of the support plate body 1 is related to the diameter of the blast hole 4 and the prestress required for the support plate body 1, and can be adjusted according to actual needs. For example, if the diameter of the blast hole 4 is 140 mm, the thickness d of the support plate body 1 along the thickness direction of the support plate body 1 is 1.0 mm; if the diameter of the blast hole 4 is 250 mm, the thickness d of the support plate body 1 along the thickness direction of the support plate body 1 is 1.8 mm; if the diameter of the blast hole 4 is 310 mm, the thickness d of the support plate body 1 along the thickness direction of the support plate body 1 is 2.5 mm.

[0077] Along the thickness direction of the support plate body 1, the thickness d of the support plate body 1 can be 1.0mm, 1.8mm or 2.5mm, that is, the support plate body 1 can be a thin plate with a thickness of millimeters. When it is subsequently recycled, the support plate body 1 can be easily pulled out by simply rolling it slightly.

[0078] Larger blastholes 4 require thicker support plates 1 to provide sufficient support and prevent the wall of the blasthole 4 from collapsing. The thickness d of the support plates 1 is proportional to the diameter of the blasthole 4, ensuring that the support plates 1 provide adequate support for blastholes 4 of varying diameters, adapting to the various needs of the blasthole 4. The support plates 1 must provide a certain amount of prestress to ensure they can stably support the wall of the blasthole 4 during charging and blasting, preventing wall collapse or the shedding of fragments.

[0079] In an alternative embodiment, referring to Figure 13-15 As shown, Figure 13 This is a schematic structural diagram of another support plate provided by the present invention in an expanded state; Figure 14 This is a schematic structural diagram of another support plate provided by the present invention in an expanded state; Figure 15 This is a structural diagram of another fixing rod provided by the present invention in another direction; in this embodiment, a third snap-fit ​​cutout group is further provided on the support plate body 1, and the third snap-fit ​​cutout group is located between the first snap-fit ​​cutout group 12 and the second snap-fit ​​cutout group 13;

[0080] The third snap cutout group includes a third snap cutout 151 and a fourth snap cutout 152. The third snap cutout 151 and the fourth snap cutout 152 penetrate the support plate body 1 along the thickness direction of the support plate body 1. Along the length direction of the support plate body 1, the third snap cutout 151 corresponds to the first snap cutout 120, and the fourth snap cutout 152 corresponds to the second snap cutout 121. The center of the third snap cutout 151 and the center of the first snap cutout 120 are located on the same horizontal line, and the center of the fourth snap cutout 152 and the center of the second snap cutout 121 are located on the same horizontal line.

[0081] The vertical portion 22 of the rod body is provided with a second limiting hinge 25 corresponding to the third locking cut 151 and the fourth locking cut 152. The second limiting hinge 25 is provided with a second locking ball 26 matching the third locking cut 151 and the fourth locking cut 152 on the side away from the vertical portion 22 of the rod body. When the support plate body 1 is bent along the circumferential direction to form a cylindrical structure, the second locking ball 26 is sequentially locked in the third locking cut 151 and the fourth locking cut 152, and the second limiting hinge 25 drives the second locking ball 26 to rotate toward the side close to the horizontal portion 21 of the rod body.

[0082] Specifically, the third snap cutout group is located in the middle of the support plate body 1. Along the length direction of the support plate body 1, the third snap cutout 151 and the fourth snap cutout 152 correspond to the first snap cutout 120 and the second snap cutout 121 respectively. The third snap cutout 151 and the fourth snap cutout 152 are both circular. The diameters of the third snap cutout 151 and the fourth snap cutout 152 are the same. The diameter is the same as the diameter of the first snap cutout 120 and the second snap cutout 121; along the length direction of the support plate body 1, the center of the third snap cutout 151 and the center of the first snap cutout 120 are located on the same horizontal line, and the center of the fourth snap cutout 152 and the center of the second snap cutout 121 are located on the same horizontal line. When the support plate body 1 is rolled into a cylindrical structure, the third snap cutout 151 and the fourth snap cutout 152 overlap.

[0083] A second limiting hinge 25 is fixedly connected to the middle of the vertical part 22 of the rod body, and the second limiting hinge 25 corresponds to the third snap cut 151 and the fourth snap cut 152. A second clamping ball 26 is fixedly connected to the second limiting hinge 25, and the second clamping ball 26 matches the third snap cut 151 and the fourth snap cut 152. When the support plate body 1 is rolled into a cylindrical structure, the center of the third snap cut 151 and the center of the fourth snap cut 152 overlap, so that the second clamping ball 26 on the fixed rod 2 passes through the third snap cut 151 and the fourth snap cut 152 in sequence. The shape of the second clamping ball 26 is the same as that of the third snap cut 151, and the diameter of the second clamping ball 26 can be slightly larger than the diameter of the third clamping block cut 151 and the fourth clamping cut 152, such as the diameter of the second clamping ball 26 is 1 mm larger than the diameter of the third clamping block cut 151 and the fourth clamping cut 152.

[0084] By adopting the above solution, a third snap-fit ​​notch group is added on the basis of the first snap-fit ​​notch group 12 and the second snap-fit ​​notch group 13 , so as to further enhance the stability between the fixing rod 2 and the rolled cylindrical structure.

[0085] Optionally, the second limit hinge 25 has the same structure as the first limit hinge 23. The second limit hinge 25 includes a second fixed page lever, a second movable page lever 252, and a second rotating shaft 253. The second fixed page lever is connected to the second movable page lever 252 via the second rotating shaft 253. The second fixed page lever is fixedly connected to the vertical portion 22 of the rod body. The second movable page lever 252 is fixedly connected to the second locking ball 26. When the second movable page lever 252 rotates around the second rotating shaft 253, it drives the second locking ball 26 to rotate toward or away from the side of the horizontal portion 21 of the rod body. When the operator presses down hard on the vertical portion 22 of the fixed rod 2, the second movable page lever 252 drives the second locking ball 26 to rotate upward by 40° to 60°, making it easier for the second locking ball 26 to be pulled out of the third snap cutout 151 and the fourth snap cutout 152 of the support plate body 1, so that the support plate body 1 can be subsequently removed, cleaned, and reused. The second position-limiting hinge 25 may be of the same model as the first position-limiting hinge 23 .

[0086] In an alternative embodiment, continue to refer to Figure 4 and Figure 5 As shown, the depth range of the lead slot 11 along the length direction of the support plate body 1 is 10cm~20cm; the diameter range of the first snap cutout 120 and the second snap cutout 121 is 1cm~2cm; along the length direction of the support plate body 1, the length range of the support plate body 1 is 2m~5m.

[0087] Specifically, if the depth of the lead slot 11 along the length direction of the support plate body 1 is too shallow, during the blasting operation, the detonator line will loosen or fall off due to external forces (such as wind), resulting in unstable connection of the detonator line. If the depth of the lead slot 11 along the length direction of the support plate body 1 is too deep, it will make the installation of the detonator line difficult and increase the disassembly and assembly time. In this embodiment, the depth range of the lead slot 11 along the length direction of the support plate body 1 is 10cm to 20cm, which can not only prevent the detonator line from loosening or falling off due to external forces (such as wind) during the blasting operation, thereby improving the connection stability of the detonator line, but also make the disassembly and assembly of the detonator line easier, while reducing the installation time. Specifically, the depth of the lead slot 11 along the length direction of the support plate body 1 can be 10cm, 12cm, 14cm, 16cm, 18cm or 20cm.

[0088] If the diameters of the first snap notch 120 and the second snap notch 121 are too small, not only will the operator be required to more precisely align and insert the first snap ball 24, increasing installation time and labor intensity, but the connection between the first snap notch 120 and the second snap notch 121 and the first snap ball 24 will not be secure enough, and may easily loosen or fall off. If the diameters of the first snap notch 120 and the second snap notch 121 are too large, not only will the manufacturing cost of the first snap ball 24 increase, but the overall weight of the fixing rod 2 may also increase, affecting its portability and operational flexibility. In this embodiment, the diameters of the first snap notch 120 and the second snap notch 121 range from 1 cm to 2 cm. This not only eliminates the need for the operator to more precisely align and insert the first snap ball 24, reducing installation time and labor intensity, but also improves the secure connection between the first snap notch 120 and the second snap notch 121 and the first snap ball 24, preventing loosening or falling off. This also reduces the manufacturing cost of the first snap ball 24, reduces the overall weight of the fixing rod 2, and improves its portability and operational flexibility. Specifically, the diameters of the first buckle cutout 120 and the second buckle cutout 121 may be 1 cm, 1.5 cm, or 2 cm.

[0089] The length of the support plate body 1 is related to the over-depth of the previous horizontal blasting and the blasting impact range, and the upper portion must be ensured to be higher than the surface slag layer. If the length of the support plate body 1 is too long along the length direction of the support plate body 1, it will cause construction difficulties and increase costs. If the length of the support plate body 1 is too short along the length direction of the support plate body 1, it will be lower than the surface slag layer, which is not conducive to forming and completing the blasthole 4. Along the length direction of the support plate body 1, the length range of the support plate body 1 in this embodiment can be designed to be 2m to 5m. This not only ensures that the length of the support plate body 1 is higher than the surface slag layer, which is conducive to completing the blasthole 4, but also reduces construction difficulties and reduces costs. Specifically, along the length direction of the support plate body 1, the length of the support plate body 1 can be 2m, 2.5m, 3m, 3.5m, 4m, 4.5m or 5m.

[0090] Reference Figure 3 、 Figure 4 、 Figure 8 、 Figure 11 、 Figure 12 、 Figure 16-18 As shown, Figure 16 This is a flow chart of a method for using a deep hole flexible support device for an open-pit mine provided by the present invention; Figure 17 This is a schematic diagram of the assembly of a deep hole flexible support device for open pit mines provided by the present invention; Figure 18 The invention provides a deep hole flexible support device for open pit mines. Figure 1An enlarged view of the blasthole at position C in the middle; this embodiment provides a method for using an open-pit mine deep hole flexible support device, which is used to drill a hole. The open-pit mine deep hole flexible support device includes the open-pit mine deep hole flexible support device described above;

[0091] S1, when the drilling equipment penetrates the surface fracture zone for at least 1 meter, the drilling is suspended but the slag is continued to form a blasthole 4, the drilling equipment including a drill bit and a drill rod connected to the drill bit;

[0092] Specifically, when the drilling equipment drills more than 1m beyond the stepped surface broken zone, the drilling is suspended, but the slag removal operation is maintained to blow out the rock debris and hole wall fragments in the hole until the hole is clean and the slag removal is stopped to form a blasthole 4.

[0093] The purpose of step S1 is to pause drilling while continuing to remove slag after the drill bit has penetrated a surface fracture zone (typically loose and prone to collapse) for more than 1 meter. This removes debris from the hole bottom and walls, preventing accumulation that could affect subsequent installation of the open-pit mine deep-hole flexible support device.

[0094] The drilling equipment mentioned above can be either a rotary drill or a down-the-hole drill, both of which have a drill bit and a drill rod. The drill bit of a rotary drill typically consists of multiple cones, each equipped with carbide or diamond teeth. The cones rotate and roll during drilling to break rock, making them suitable for drilling in harder rock formations. The drill bit is designed to withstand high impact forces and torque, making it suitable for deep hole drilling. The drill rod of a rotary drill is typically made of high-strength steel with high torsional and tensile strength. The drill rods are threaded together to form a continuous drill string, transmitting torque and thrust from the drill bit to the drill bit. Furthermore, the drill rod of a rotary drill has internal channels for supplying compressed air or mud to remove rock debris from the borehole. The drill bit of a down-the-hole drill is typically a percussive drill bit with carbide teeth, designed for impact crushing in harder rock. This drill bit uses high-speed impact and rotation to break rock, making it suitable for drilling in medium-hard to hard rock formations. The drill rod of a down-the-hole drill is usually short and made of high-strength steel with high torsional and impact resistance; the drill rod is connected by threads to form a continuous drill string, which transmits the impact force and torque transmitted by the drill bit to the drill bit.

[0095] S2. First, roll the support plate 1 around the drill rod into a cylindrical structure. Then, snap the first snap ball 24 on the fixing rod 2 into the first snap notch 120 and the second snap notch 121 in sequence, secure the fixing rod 2 to the drill rod, and then insert the rolled cylindrical structure into the blasthole 4.

[0096] Specifically, the support plate 1 is rolled around the drill rod, and the first locking ball 24 on the fixing rod 2 is sequentially engaged with the first locking notch 120 and the second locking notch 121, ensuring that the support plate 1 is stably fixed to the fixing rod 2 in the rolled state. The fixing rod 2 is fixed to the drill rod using an inner buckle method, and then the rolled cylindrical structure is inserted into the blasthole 4.

[0097] S3. Move the cylindrical structure downward along the drill pipe until it is 0.5 meters above the ground surface. Grasp the lifting slit 14 with one hand and push the fixing rod 2 downward with the other hand until the first locking ball 24 is disengaged from the first locking notch 120 and the second locking notch 121. When the cylindrical structure is fully opened and in contact with the wall of the corresponding blasthole 4, remove the fixing rod 2.

[0098] Specifically, taking the rotary drill as an example, move the rolled support plate body 1 downward along the drill rod until the support plate body 1 is exposed about 0.5m above the ground surface. Grab the lifting cut of the support plate body 1 with one hand, and push the fixing rod 2 down with the other hand until the first locking ball 24 disengages from the first snap cut 120 and the second snap cut 121. Wait until the rolled support plate body 1 is fully opened and fully contacts the wall of the blast hole 4, remove the fixing rod 2, and complete the installation of the support plate body 1.

[0099] S4, restart the drilling equipment until the entire blasthole 4 is completed;

[0100] Specifically, the roller drill or down-the-hole drill is restarted and drilling is continued until the entire blasthole 4 reaches the designed depth, that is, the drilling work of the entire blasthole 4 is completed.

[0101] S5, looping steps S1 to S5 until all blastholes 4 are equipped with cylindrical structures;

[0102] Specifically, the installation of the support plate body 1 of each blast hole 4 is completed in sequence according to the order of step S1 to step S5 until the support plate body 1 is installed in all blast holes 4 .

[0103] S6. Place the assembled detonator and detonator in the blast hole 4, place the detonator lead in the lead slot 11, and after the charge is completed in the blast hole 4, take out the cylindrical structure.

[0104] Specifically, the explosive bomb and the detonator are installed and placed in the blast hole 4. The detonator wire is clamped on the lead clamping groove 11 pre-set on the support plate body 1 to ensure that the detonator wire is firmly fixed.

[0105] After the charging is completed, one person takes out the detonator wire from the lead slot 11, and the other person slowly pulls out the rolled support plate body 1 obliquely upward by lifting and cutting, and re-fixes the detonator wire to ensure its safety; finally, the unfolded support plate body 1 is collected, cleaned, and reused.

[0106] It can be seen from the above embodiments that the method for using the open-pit mine deep hole flexible support device provided in this embodiment achieves at least the following beneficial effects:

[0107] The method for using the flexible support device for deep holes in open-pit mines provided by the present invention is simple and convenient to use. Since the support plate body 1 is only a PET sheet with a thickness of millimeters, it can be placed in the blast hole after being rolled and fixed, and then the fixing long rod buckle can be released. When recovering, it can be easily pulled out by slightly rolling the inner PET sheet, and the detonator line can pass through the edge of the stretched plate. At the same time, it can be rolled around the drill hole and placed in the blast hole to be drilled in advance, solving the technical problem of difficulty in hole formation caused by repeated erosion of the hole wall by a mixture of rock slag and water.

[0108] It should be noted that after the drilling operation is completed but before the blasthole 4 is filled, the support plate 1 can be used to support the blasthole 4 to cope with the possible slow instability problem of scum on the surface of the intact blasthole 4 and hole wall fragments.

[0109] The completion of the drilling operation means that the drilling equipment has completed the drilling of the blasthole 4, the drill bit has withdrawn from the blasthole 4, and the blasthole 4 has been formed.

[0110] In blasting operations, packing refers to filling the remaining portion of the blast hole 4 with packing materials after the charging is completed, so as to prevent the explosion gas from escaping from the blast hole 4 and improve the blasting effect.

[0111] After the drilling operation is completed but before the blasthole 4 is filled, the support plate 1 can be used to support the blasthole 4. The specific steps are as follows: 1) The support plate 1 rolled in the processing plant or on site is moved downward along the drill pipe of the cone drill or down-the-hole drill until the support plate 1 is about 0.5m above the ground surface. One hand grasps the lifting and pulling slits, and the other hand pushes down the fixing rod 2 with force until the first clamping ball 24 is disengaged from the first clamping notch 120 and the second clamping notch 121. After the rolled support plate 1 is fully opened and in full contact with the wall of the blasthole 4, the fixing rod 2 is removed;

[0112] Repeat the above steps until all blastholes 4 are installed with the support plate body 1;

[0113] Place the assembled explosive bomb and detonator in the blast hole 4, and the detonator lead in the lead slot 11. After the loading is completed, one person takes the detonator wire out of the slot first, and the other person slowly pulls out the rolled support plate body 1 obliquely upward by lifting and cutting, re-fixes the detonator wire, and finally collects, cleans and reuses the unfolded support plate body 1.

[0114] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A deep hole flexible support device for open pit mines, characterized in that: It includes a rectangular or fan-shaped support plate and a fixing rod. The support plate is made of polyethylene terephthalate, wherein: A lead slot is provided on the top of the support plate body, and the lead slot is recessed toward the geometric center of the support plate body; along the length direction of the support plate body, a first snap cutout group and a second snap cutout group are also provided on the support plate body in parallel, the first snap cutout group is located near one side of the lead slot, and the second snap cutout group is located near the bottom of the support plate body; Along the width direction of the support plate body, the first snap cutout group and the second snap cutout group respectively include a first snap cutout and a second snap cutout parallel to each other, the first snap cutout and the second snap cutout penetrate the support plate body along the thickness direction of the support plate body, the first snap cutout and the second snap cutout are circular in shape, the center of the first snap cutout and the center of the second snap cutout are located on the same horizontal line, the center of the first snap cutout in the first snap cutout group and the center of the first snap cutout in the second snap cutout group, the center of the second snap cutout in the first snap cutout group and the center of the second snap cutout in the second snap cutout group are respectively located on the same horizontal line, and are perpendicular to each other along the thickness direction of the support plate body, along the width direction of the support plate body and along the length direction of the support plate body; Along the width direction of the support plate, the distance between the center of the first buckle cutout and the center of the second buckle cutout is πD j , along the width direction of the support plate, the distance from the center of the first buckle cutout to the edge of the support plate is πD, and the width of the support plate must satisfy πD <B<1.5πD j ; The support plate body is further provided with a lifting seam, which penetrates the support plate body along the thickness direction of the support plate body, and is in the shape of a semi-ellipse, with the opening of the lifting seam facing the top of the support plate body; along the length direction of the support plate body, the lifting seam is located between the lead slot and the first buckle cutout group; The fixing rod includes a horizontal portion of the rod body and a vertical portion of the rod body connected to the horizontal portion of the rod body, and a T-shaped structure is formed between the horizontal portion of the rod body and the vertical portion of the rod body, and the length extension direction of the vertical portion of the rod body is the same as the length extension direction of the support plate body, and the vertical portion of the rod body extends along the length direction of the support plate body, and the vertical portion of the rod body is provided with a first limiting hinge corresponding to the first snap cut and the second snap cut, and the first limiting hinge is provided with a first clamping ball matching the first snap cut and the second snap cut on the side away from the vertical portion of the rod body, when the support plate body is bent along the circumferential direction to form a cylindrical structure, the first clamping ball is sequentially clamped into the first snap cut and the second snap cut, and the first limiting hinge drives the first clamping ball to rotate toward the side close to the horizontal portion of the rod body.

2. The open-pit mine deep hole flexible support device according to claim 1, characterized in that: The first limit hinge includes a first fixed page rod, a first movable page rod and a first rotating shaft. The first fixed page rod is connected to the first movable page rod through the first rotating shaft. The first fixed page rod is fixedly connected to the vertical part of the rod body. The first movable page rod is fixedly connected to the first locking ball. When the first movable page rod rotates around the first rotating shaft, the first locking ball is driven to rotate toward or away from the side of the horizontal part of the rod body.

3. The open-pit mine deep hole flexible support device according to claim 1, characterized in that: Along the width direction of the support plate body, the lifting seam includes a first lifting seam and a second lifting seam in parallel. Along the length direction of the support plate body, the orthographic projection of the first lifting seam and the orthographic projection of the first buckle incision do not overlap at all; the orthographic projection of the second lifting seam overlaps with the orthographic projection of the second buckle incision.

4. The open-pit mine deep hole flexible support device according to claim 3, characterized in that: The thickness of the support plate body is proportional to the diameter of the blasthole.

5. The open-pit mine deep hole flexible support device according to claim 1, characterized in that: The support plate body is further provided with a third snap-in notch group, and the third snap-in notch group is located between the first snap-in notch group and the second snap-in notch group; The third snap-in cutout group includes a third snap-in cutout and a fourth snap-in cutout, the third snap-in cutout and the fourth snap-in cutout penetrate the support plate body along the thickness direction of the support plate body, along the length direction of the support plate body, the third snap-in cutout corresponds to the first snap-in cutout, the fourth snap-in cutout corresponds to the second snap-in cutout, the center of the third snap-in cutout and the center of the first snap-in cutout are located on the same horizontal line, and the center of the fourth snap-in cutout and the center of the second snap-in cutout are located on the same horizontal line; The vertical part of the rod body is provided with a second limiting hinge corresponding to the third snap cut and the fourth snap cut, and the second limiting hinge is provided with a second clamping ball matching the third snap cut and the fourth snap cut on the side away from the vertical part of the rod body. When the support plate body is bent along the circumferential direction to form a cylindrical structure, the second clamping ball is sequentially clamped to the third snap cut and the fourth snap cut, and the second limiting hinge drives the second clamping ball to rotate toward the side close to the horizontal part of the rod body.

6. The open-pit mine deep hole flexible support device according to claim 1, characterized in that: The depth of the lead clamping groove along the length direction of the support plate body ranges from 10 cm to 20 cm; The diameter of the first buckle incision and the second buckle incision ranges from 1 cm to 2 cm; Along the length direction of the support plate body, the length of the support plate body ranges from 2m to 5m.

7. A method for using a deep hole flexible support device in an open pit mine, characterized in that: Drilling is performed using an open-pit mine deep hole flexible support device, wherein the open-pit mine deep hole flexible support device comprises the open-pit mine deep hole flexible support device according to any one of claims 1 to 6; S1. When a drilling device penetrates a surface fracture zone for at least 1 meter, drilling is suspended but slag removal is continued to form a blasthole, wherein the drilling device includes a drill bit and a drill rod connected to the drill bit; S2. First, the support plate is rolled around the drill rod into a cylindrical structure. Then, the first clamping ball on the fixing rod is sequentially clamped to the first clamping notch and the second clamping notch, the fixing rod is fixed to the drill rod, and then the rolled cylindrical structure is inserted into the blasthole. S3, the cylindrical structure moves downward along the drill pipe until it is 0.5 meters above the ground surface. One hand grasps the lifting seam, and the other hand pushes down the fixing rod with force until the first locking ball disengages from the first locking notch and the second locking notch. When the cylindrical structure is fully opened and in contact with the wall of the corresponding blasthole, the fixing rod is removed. S4, restarting the drilling equipment until the entire blasthole is completed; S5, looping steps S1 to S5 until all blastholes are equipped with the cylindrical structure; S6. Place the assembled detonating bomb and detonator in the blast hole, place the detonator lead in the lead slot, and after the charge is completed in the blast hole, take out the cylindrical structure.

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