A hole protection device for open-pit mine blast hole drilling machine construction and a construction method

Abstract

This invention discloses a hole protection device and construction method for open-pit mine blasting hole drilling rigs. The device and method are used in the field of open-pit mine blasting hole drilling. An installation frame is set up, with a telescopic component connected to the bottom of the frame. A guide component is installed at the end of the telescopic component. A leveling and slag removal component is coaxially arranged with the guide component. The guide component guides the drilling position, and the leveling and slag removal component levels and / or removes slag from the drilling position. The hole protection device is installed at the front end of the frame below the tracked vehicle body. Through cooperation with the tracked vehicle body and the power head, it can realize the hole protection function during open-pit mine blasting hole drilling. Combined with electro-hydraulic control technology, it can achieve program control and automated operation. The construction method requires the coordinated operation of the hole protection device, the tracked vehicle body, and the power head to achieve the automatic hole protection function during open-pit mine blasting hole drilling, eliminating the need for manual intervention, reducing the labor intensity of workers, and improving operational safety.

Description

Technical Field

[0001] This invention relates to the technical field of equipment for drilling blast holes in open-pit mines, and particularly to a hole protection device and construction method for drilling blast holes in open-pit mines. Background Technology

[0002] Currently, in open-pit mine blasting hole construction, after drilling is completed, to prevent drill cuttings from falling into the completed borehole and affecting the actual drilling depth, and consequently the blasting depth, manual cleaning of the drill cuttings around the borehole is required. This presents problems such as high labor intensity, low safety, and difficulties for workers operating outdoors in extremely cold and hot climates. In view of these challenges, the designers of this invention have devoted themselves to studying the characteristics of the drilling structure and drilling process of open-pit mine blasting hole drilling rigs. Combining years of experience and achievements in related industries, they have researched and designed a hole protection device and construction method for open-pit mine blasting hole drilling rigs. This device automatically protects the hole after drilling, overcoming the problems of high labor intensity, low safety, and difficulties for workers operating outdoors in extreme weather conditions. Combined with automatic program control, it can automate the hole protection operation during open-pit mine blasting hole drilling. Summary of the Invention

[0003] The purpose of this invention is to provide a hole protection device and construction method for open-pit mine blasting hole drilling, in order to overcome the problems of drill cuttings around the borehole easily falling into the borehole when the blasting hole drilling rig is constructing open-pit cross-layer blasting boreholes, the high labor intensity and low safety of manual cleaning of drill cuttings, and the difficulty of workers working outdoors under extreme weather conditions.

[0004] To solve the above problems, the technical solution adopted by the present invention includes:

[0005] A hole protection device for drilling blast holes in open-pit mines includes a mounting frame with a telescopic component attached below it; a guide assembly is installed at the end of the telescopic component; and a leveling and slag removal assembly is coaxially arranged with the guide assembly. The guide assembly guides the drilling position, and the leveling and slag removal assembly levels and / or removes slag from the drilling position.

[0006] Optionally, the guide assembly is provided with a guide plate, a guide cylinder is embedded in the guide plate, and a positioning cylinder is connected to the bottom of the guide cylinder; the guide plate is connected to the end of the telescopic component; the guide cylinder and the positioning cylinder guide the drilling position.

[0007] Optionally, the guide cylinder is a conical cylinder, and the positioning cylinder is a cylindrical cylinder; and a guide ring is provided below the edge of the guide disc.

[0008] Optionally, the rotary leveling and slag discharge assembly is equipped with a cutter disc, under which multiple blades are evenly distributed at an angle θ; and the cutter disc is provided with rotational power by a rotary power assembly.

[0009] Optionally, the rotary power assembly includes a self-lubricating bearing mounted on the guide assembly, with a driven gear coaxially mounted on the self-lubricating bearing; it also includes a motor suspended on the guide disc, with a driving gear mounted on the motor; the driving gear meshes with the driven gear.

[0010] Optionally, the telescopic component is a telescopic column, which includes an upper guide column and a lower guide column. The upper guide column and the lower guide column slide up and down through a telescopic hydraulic cylinder. The upper guide column is provided with a first guide plate and a second guide plate, and the lower guide column slides along the extension direction of the first guide plate and the second guide plate.

[0011] A method for constructing a hole protection device for open-pit mine blasting hole drilling rigs, wherein the hole protection device includes any of the hole protection devices for open-pit mine blasting hole drilling rigs described in this invention, specifically including installing the hole protection device on a tracked vehicle body:

[0012] The mounting frame is installed at the bottom of the tracked vehicle body, the telescopic column is installed at the bottom of the mounting frame and the upper part of the guide assembly, the upper part of the guide assembly is installed at the bottom of the telescopic column, and the lower part is installed with a rotary leveling and slag discharge assembly; a feed frame is set on the tracked vehicle body, and a power head is installed on the feed frame, and the power head is coaxial with the hole protection device.

[0013] Optionally, the specific installation method of the coaxially arranged rotary slag discharge assembly of the guide component includes: a self-lubricating bearing is sleeved outside the positioning cylinder, a driven gear is coaxially arranged outside the self-lubricating bearing, a motor is mounted on the guide plate to drive the drive gear to rotate, which in turn drives the driven gear to rotate, the cutter head is mounted on the self-lubricating bearing, and multiple cutters are evenly distributed at an angle θ below the cutter head; a first stop sleeve is mounted on the upper part of the self-lubricating bearing, and a second stop sleeve is mounted on the lower part of the positioning cylinder; the upper end of the self-lubricating bearing is positioned by the shoulder A, and the lower end is positioned by the threaded hole D on the positioning cylinder and the through hole C on the second stop sleeve; the upper end of the driven gear is positioned by the through hole E of the first stop sleeve and the threaded hole B on the self-lubricating bearing, and the lower end is positioned by the shoulder of the lower end of the self-lubricating bearing; the outer side of the positioning cylinder has symmetrical mounting slots G, and the self-lubricating bearing is installed and locked by the cooperation of the buckle H on the self-lubricating bearing and the mounting slot G; the buckle K on the second stop sleeve cooperates with the mounting slot G on the self-lubricating bearing to install and lock the second stop sleeve.

[0014] Optionally, the overall capability output coefficient m of the cutter head is:

[0015]

[0016] Where: m is the overall output coefficient of the cutter head;

[0017] N f The input power of the cutter head is in kW.

[0018] k1 is the power correction factor, with a value ranging from 0.9 to 1;

[0019] η1 is the working efficiency of the cutter head;

[0020] θ is the actual working angle of the lever, in degrees;

[0021] θ0 is the mounting angle of the cutter, in degrees;

[0022] Q1 is the total flow rate of drill cuttings in the borehole, in L / min;

[0023] γ is the volume fraction of drill cuttings;

[0024] k2 is the correction factor for the amount of drill cuttings, with a value ranging from 0.9 to 1;

[0025] B1 is the installation height of the cutter, in mm;

[0026] H1 is the installation length of the cutter, in mm;

[0027] n is the actual operating speed of the cutter head, in r / min;

[0028] n0 is the drift speed of the drill cuttings, in L / min;

[0029] 'a' is the variable adjustment coefficient, which takes a value of 0 to 3.

[0030] b is the variable adjustment coefficient, which takes a value of 0 to 3;

[0031] Initially, the default tool head comprehensive capability output coefficient m is selected. The initial working angle θ and working speed n of the tool head are obtained by solving. The actual working angle θ and the actual working speed n of the tool head are adjusted at fixed intervals. The particle swarm optimization algorithm is used for local optimization to obtain the optimal actual working angle θ and the actual working speed n of the tool head, so as to ensure that the tool head comprehensive capability output coefficient m reaches the maximum.

[0032] Optional, the specific implementation steps are as follows:

[0033] 1) Move the drilling rig to the construction site, and extend the tracks under the vehicle body to firmly support the drilling rig;

[0034] 2) The telescopic column in the hole protection device extends downwards until it contacts the ground. At this time, the motor drives the drive gear to rotate, which in turn drives the cutter head to rotate. At the same time, the telescopic column slowly extends downwards until it can no longer extend downwards, leveling the area around the hole to be drilled and ensuring that the opening position is flat.

[0035] 3) The motor stops working, and the cutter head stops rotating;

[0036] 4) The power head drives the drill rod to rotate along the feed frame and move towards the hole. At this time, the guide cylinder in the guide assembly guides the drill bit that is broken off at the front of the drill rod. The power head starts drilling and the drill cuttings are discharged from the borehole through the guide cylinder.

[0037] 5) After drilling is completed, the power head moves the drill rod out of the borehole to the tracked vehicle body. The cutter head starts to rotate and slowly removes the drill cuttings attached to the perimeter of the borehole protection device. At the same time, the telescopic column rises slowly, driving the cutter head to rise slowly. During the rise, the cutter head rotates again to remove the scattered drill cuttings, ensuring that the drill rod does not fall into the borehole.

[0038] 6) After the telescopic column is raised, the tracked vehicle body is retracted and the drilling rig begins to move to the next drilling position to prepare for drilling a new hole.

[0039] The present invention has the following effects:

[0040] The hole protection device, in conjunction with the tracked vehicle body and the power head, can prevent drill cuttings from falling into the hole and affecting the actual drilling depth when the blasting hole drilling rig is drilling.

[0041] By combining electro-hydraulic control technology, automatic hole protection can be achieved during drilling operations of blasting hole drilling rigs, reducing the labor intensity of workers and improving their safety.

[0042] The details of this invention will become apparent from the following description and the accompanying drawings. Attached Figure Description

[0043] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0044] Figure 1 This is a three-dimensional structural view of the hole protection device for open-pit mine blasting hole drilling rig according to the present invention;

[0045] Figure 2 for Figure 1 A schematic diagram of the telescopic column structure in the diagram;

[0046] Figure 3 for Figure 1 A schematic diagram of the guiding component structure in the diagram;

[0047] Figure 4 for Figure 3 A longitudinal sectional view;

[0048] Figure 5 for Figure 1 A schematic diagram of the cutter head structure in the diagram;

[0049] Figure 6This is a schematic diagram of a self-lubricating bearing structure. The top image is a top view, and the bottom image is a longitudinal sectional view.

[0050] Figure 7 The diagrams show the stop sleeve structure; the left diagram shows the first stop sleeve structure, and the right diagram shows the second stop sleeve structure.

[0051] Figure 8 This is a schematic diagram illustrating the installation and use of the hole protection device for open-pit mine blasting hole drilling rig according to the present invention;

[0052] Meaning of the labels in the attached figures:

[0053] a-Feeding frame, b-Power head, c-Crawler hull, d-Hole protection device;

[0054] 1-Mounting frame, 2-Telescopic column, 3-Guide assembly, 4-Slag discharge assembly;

[0055] 11-Mounting beam, 12-Mounting plate;

[0056] 21-Top connecting plate, 22-Fixing pin, 23-Telescopic cylinder, 24-Upper guide post, 25-Lower guide post, 26-First guide plate, 27-Second guide plate, 28-Bottom connecting plate;

[0057] 31-Guide disc, 311-Telescopic column mounting plate, 312-Motor mounting hole; 32-Guide cylinder, 33-Positioning cylinder, 34-Guide ring;

[0058] 41-Motor, 42-Driven gear, 43-Cutter head, 44-Drive gear, 45-Pulley;

[0059] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Detailed Implementation

[0060] Following the above technical solutions, specific embodiments of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention. The present invention will be further described in detail below with reference to the embodiments.

[0061] Combination Figure 1-8The present invention relates to a hole protection device for open-pit mine blasting hole drilling rigs, comprising a mounting frame 1, with a telescopic component attached to the bottom of the mounting frame 1; a guide component 3 is installed at the end of the telescopic component; and a rotary leveling and slag removal component 4 is coaxially mounted with the guide component 3. The guide component 3 guides the drilling position, and the rotary leveling and slag removal component 4 performs rotary leveling and / or slag removal at the drilling position. The installation steps of the hole protection device d are as follows: the mounting frame 1 is installed at the bottom of the tracked vehicle body; the telescopic column 2 is installed at the bottom of the mounting frame 1 and the upper part of the guide component 3; the upper part of the guide component 3 is installed at the bottom of the telescopic column 2, and the lower part is installed with the rotary leveling and slag removal component 4; a feed frame a is set on the tracked vehicle body c, and a power head b is installed on the feed frame a, with the power head b coaxial with the hole protection device d. The hole protection device d of the present invention, in conjunction with the tracked vehicle body c and the power head b, can prevent drill cuttings from falling into the hole and affecting the actual drilling depth during the drilling operation of the blasting hole drilling rig. Combined with electro-hydraulic control technology, it can achieve the purpose of automatic hole protection during the drilling operation of the blasting hole drilling rig, reducing the labor intensity of workers and improving the safety of workers.

[0062] Combination Figure 3 and 4 In the embodiments of this disclosure, the guide assembly 3 is provided with a guide disk 31, a guide cylinder 32 is embedded in the guide disk 31, and a positioning cylinder 33 is connected to the lower part of the guide cylinder 32; the guide disk 31 is connected to the end of the telescopic component; the guide cylinder 32 and the positioning cylinder 33 are coaxially guiding the drilling position. The guide assembly 3 is used to guide the drill bit into the designated drilling position and to discharge drill cuttings during drilling construction, and includes a guide cylinder 32, a telescopic column mounting plate 311, a guide disk 31, a guide ring 34, and a positioning cylinder 33. The guide cylinder 32 and the positioning cylinder 33 are aligned and installed as a whole at the center of the guide disk 31, and the telescopic column mounting plate 311 is symmetrically installed on both sides of the guide disk 31.

[0063] In the embodiments of this disclosure, the guide cylinder 32 is a conical cylinder, and the positioning cylinder 33 is a cylindrical cylinder; and a guide ring 34 is provided at the lower edge of the guide plate 31; the guide ring 34 is installed at the bottom of the guide plate 31 to ensure that the outer edge of the mounting vertical plate is concentric with the mounting plate and aligned with the outer edge of the mounting plate.

[0064] Combination Figure 1 and 5 In the embodiments of this disclosure, the rotary leveling and slag removal assembly 4 is equipped with a cutterhead 43, under which multiple cutting tools 45 are evenly distributed at an angle θ; and the cutterhead 43 is powered by a rotary power assembly. The cutterhead 43 is connected to the bottom of the guide assembly 3, and its function is to level the ground at the opening position before drilling by rotating the cutterhead to ensure that the guide assembly 3 can be pressed flat near the opening position. After drilling, the rotation of the cutterhead removes the drill cuttings around the drill hole, ensuring that the removed drill cuttings do not fall into the hole. For example, in a preferred embodiment, six cutting tools 45 are evenly distributed at an angle θ on the cutterhead 43, and the angle θ is adjustable.

[0065] Combination Figure 1 In the embodiments of this disclosure, the rotary power assembly includes a self-lubricating bearing disposed on the guide assembly 3, with a driven gear 42 coaxially disposed on the self-lubricating bearing; it also includes a motor 41 suspended on the guide disc 31, with a driving gear 44 disposed on the motor 41; the driving gear 44 meshes with the driven gear 42. A cutter head 43 is mounted at the lower part. The motor 41 is mounted on the guide assembly 3 to drive the driving gear 44 to rotate, thereby driving the driven gear 42 to rotate. The self-lubricating bearing is mounted on a positioning cylinder 33 in the guide assembly 3. The positioning cylinder 33 has a stop on its upper side to prevent the self-lubricating bearing from moving upward. A first stop sleeve is mounted on the upper part of the self-lubricating bearing to prevent the driven gear 42 from moving upward. The lower end of the driven gear 42 is positioned by the shoulder of the self-lubricating bearing. A second stop sleeve is mounted on the lower part of the positioning cylinder 33 to prevent the self-lubricating bearing from moving downward. An adjusting shim is mounted between the driven gear 42 and the cutter head 43 to adjust the gap between them.

[0066] Combination Figure 2 In the embodiments of this disclosure, the telescopic component is a telescopic column 2, which includes an upper guide column 24 and a lower guide column 25. The upper guide column 24 and the lower guide column 25 slide up and down through a telescopic cylinder 23. The upper guide column 24 is provided with a first guide plate 26 and a second guide plate 27, and the lower guide column 25 slides along the extension direction of the first guide plate 26 and the second guide plate 27. The telescopic column 2 is used to lower and raise the guide assembly 3, the cutter head 43, and other devices during drilling operations of a blasting hole drilling rig. From top to bottom, the components are arranged as follows: a top connecting plate 21, a fixing pin 22, a telescopic cylinder 23, an upper guide column 24, a first guide plate 26, a second guide plate 27, a lower guide column 25, and a bottom connecting plate 28. The top plate 21 is installed at the bottom of the mounting bracket 1, the upper guide post 24 is installed at the bottom of the top plate 21, and the two ends of the telescopic cylinder 23 are respectively installed at the ends of the upper guide post 24 and the lower guide post 25 by means of fixing pins 22. The extension and retraction of the telescopic cylinder 23 realizes the sliding of the lower guide post 25 inside the upper guide post 24. The first guide plate 26 and the second guide plate 27 realize the limiting function of the four surfaces along the sliding direction when the lower guide post 25 slides.

[0067] In this invention, the mounting frame 1 acts as an intermediate link, connected by bolts. One end of the mounting frame 1 is connected to the bottom of the tracked vehicle body c, and the other end is connected to the telescopic column 2. The mounting frame 1 includes a horizontally and vertically arranged mounting beam 11. A mounting plate 12 is provided on the top of the mounting beam 11. One side of the mounting plate 12 is installed on the mounting frame 1, and the other side is installed on the bottom of the tracked vehicle body c. The functional components of this invention are suspended at the bottom of the vehicle body, which facilitates coaxial docking with the power head b installed on it and makes it convenient to locate the bottom drilling.

[0068] Combination Figure 1-7 The specific installation methods for the guide assembly coaxially set with the rotary leveling and slag discharge assembly include:

[0069] The self-lubricating bearing is installed on the positioning cylinder 33 in the guide assembly 3. The upper end of the self-lubricating bearing is positioned by the shaft shoulder A, and the lower end is positioned by the threaded hole D on the positioning cylinder 33 and the through hole C on the second stop sleeve, ensuring that the self-lubricating bearing will not move axially.

[0070] Driven gear 42 is mounted on self-lubricating bearing. The upper end of driven gear 42 is positioned by the first stop sleeve through hole E and the threaded hole B on the self-lubricating bearing, and the lower end is positioned by the lower end shoulder of the self-lubricating bearing, so as to ensure that the self-lubricating bearing will not be axially misaligned during the transmission of torque and speed.

[0071] The maximum pressure of the telescopic cylinder 23 during descent must not exceed the maximum tensile force that the anti-deformation system can withstand when it is open, in order to prevent damage to the various components in the protective hole device during the descent of the telescopic column 2.

[0072] The positioning cylinder 33 in the guide assembly 3 has symmetrical mounting slots G on its outer side. When installing the self-lubricating bearing, the self-lubricating bearing is installed in the appropriate position by the cooperation of the buckle H and the mounting slot G. The self-lubricating bearing is then rotated until the buckle H and the mounting slot G no longer cooperate to achieve the buckling of the self-lubricating bearing. The buckle K on the second stop sleeve cooperates with the mounting slot G to install the stop sleeve 2 on the positioning cylinder 33. The second stop sleeve is rotated until the buckle K and the slot G no longer cooperate to achieve the buckling lock, which provides secondary protection against the slippage of the self-lubricating bearing.

[0073] The overall capability output coefficient m of the cutter head is:

[0074]

[0075] Where: m is the overall output coefficient of the cutter head;

[0076] N f The input power of the cutter head is in kW.

[0077] k1 is the power correction factor, with a value ranging from 0.9 to 1;

[0078] η1 is the working efficiency of the cutter head;

[0079] θ is the actual working angle of the lever, in degrees;

[0080] θ0 is the mounting angle of the cutter, in degrees;

[0081] Q1 is the total flow rate of drill cuttings in the borehole, in L / min;

[0082] γ is the volume fraction of drill cuttings;

[0083] k2 is the correction factor for the amount of drill cuttings, with a value ranging from 0.9 to 1;

[0084] B1 is the installation height of the cutter, in mm;

[0085] H1 is the installation length of the cutter, in mm;

[0086] n is the actual operating speed of the cutter head, in r / min;

[0087] n0 is the drift speed of the drill cuttings, in L / min;

[0088] 'a' is the variable adjustment coefficient, which takes a value of 0 to 3.

[0089] b is the variable adjustment coefficient, which takes a value of 0 to 3.

[0090] Formula 1 can be used to calculate the overall capability output coefficient m of the cutter head. The initial default overall capability output coefficient m is selected. The initial working angle θ and working speed n of the cutter head are obtained by solving. The actual working angle θ and the actual working speed n of the cutter head are adjusted at fixed intervals. The particle swarm optimization algorithm is used for local optimization to obtain the optimal actual working angle θ and the actual working speed n of the cutter head, so as to ensure that the overall capability output coefficient m of the cutter head reaches the maximum.

[0091] Figure 6 A schematic diagram of the self-lubricating bearing structure shows that the self-lubricating bearing is installed on the positioning cylinder 33 in the guide assembly 3. The upper end of the self-lubricating bearing is positioned by the shaft shoulder A, and the lower end is positioned by the threaded hole D on the positioning cylinder 33 and the through hole C on the second stop sleeve, ensuring that the self-lubricating bearing will not move axially.

[0092] Figure 7 The left figure is a schematic diagram of the first stop sleeve structure. The first stop sleeve is installed on the upper end of the self-lubricating bearing. The driven gear 42 can move upward through the through hole E on the first stop sleeve and the B port on the self-lubricating bearing.

[0093] Figure 7 The right figure is a schematic diagram of the second stop sleeve structure. The second stop sleeve is installed on the positioning cylinder 33 by engaging with the buckle K and the slot G on the positioning cylinder 33 through the buckle K. Rotating the second stop sleeve until the buckle K and the slot G do not engage provides secondary protection against the slippage of the self-lubricating bearing. The C port on the second stop sleeve engages with the D port on the positioning cylinder 33 to prevent the stop sleeve 2 from sliding downward.

[0094] Combination Figure 1-8 The construction method of the hole protection device for open-pit mine blasting hole drilling rig of the present invention includes the following steps:

[0095] 1) Move the drilling rig to the construction site, and extend the tracks under the vehicle body to firmly support the drilling rig;

[0096] 2) The telescopic column 2 in the hole protection device d extends downward to contact the ground. At this time, the motor 41 drives the active gear 44 to drive the driven gear 42 to rotate, which in turn drives the cutter head 43 to rotate. At the same time, the telescopic column 2 slowly extends downward to the maximum tension that the anti-deformation system can withstand when it is opened, that is, the telescopic column 2 can no longer extend downward, flattening the area around the hole to be drilled, and ensuring that the opening position is flat.

[0097] 3) Motor 41 stops working, and cutter head 43 stops rotating;

[0098] 4) The drill head drives the drill rod to rotate and move towards the hole. At this time, the guide cylinder 32 in the guide assembly 3 guides the drill bit that is broken off at the front of the drill rod, ensuring the accuracy of the drilling position. The drill starts drilling and the drill cuttings are discharged from the borehole through the guide cylinder 32.

[0099] 5) After drilling is completed, the power head moves the drill rod out of the borehole to the tracked vehicle body. The cutter head 43 starts to rotate and slowly removes the drill cuttings attached to the perimeter of the hole protection device d. At the same time, the telescopic column 2 slowly rises, which drives the cutter head 43 to rise slowly. During the rising process, the cutter head 43 rotates again to remove the scattered drill cuttings, ensuring that the drill rod will not fall into the borehole and affect the drilling depth and further affect the blasting depth.

[0100] 6) When the telescopic column 2 rises to the limit position where the anti-deformation system is compressed, ensure that the cylinder rod of the telescopic cylinder 23 is not completely retracted and will not damage the hole protection device d. At this time, the tracked vehicle body is stably retracted, and the drilling rig begins to move to the next hole opening position to prepare for the start of new drilling.

[0101] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0102] In the above description, unless otherwise explicitly specified and limited, terms such as "setup" and "connection" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections or indirect connections, etc. Those skilled in the art can understand the specific meaning of the above terms in this technical solution according to the specific circumstances.

[0103] The specific technical features described in the above embodiments can be combined in any suitable manner without contradiction, as long as they do not violate the spirit of the present invention, and should also be regarded as the content disclosed by the present invention.

Claims

1. A construction method for a hole protection device used in open-pit mine blasting hole drilling, characterized in that, The hole protection device is provided with a mounting frame (1), and a telescopic component is connected to the bottom of the mounting frame (1); a guide component (3) is installed at the end of the telescopic component; a rotary leveling and slag discharge component (4) is provided coaxially with the guide component (3); the guide component (3) guides the drilling position, and the rotary leveling and slag discharge component (4) performs rotary leveling and / or slag discharge on the drilling position; The guide assembly (3) is provided with a guide plate (31), and a guide cylinder (32) is embedded on the guide plate (31). A positioning cylinder (33) is connected to the bottom of the guide cylinder (32). The guide plate (31) is connected to the end of the telescopic component. The guide cylinder (32) and the positioning cylinder (33) are coaxially guiding the drilling position. The rotary leveling slag discharge assembly (4) is equipped with a cutter head (43), which is angled below the cutter head (43). Multiple blades (45) are evenly distributed; and the blade disc (43) is provided with rotational power through a rotational power assembly; The rotary power assembly includes a self-lubricating bearing mounted on the guide assembly (3), with a driven gear (42) coaxially mounted on the self-lubricating bearing; it also includes a motor (41) suspended on the guide disc (31), with a driving gear (44) mounted on the motor (41); the driving gear (44) meshes with the driven gear (42); The construction method specifically includes: installing the hole protection device (d) on the tracked vehicle body (c): the mounting frame (1) is installed at the bottom of the tracked vehicle body (c), the telescopic column (2) is installed at the bottom of the mounting frame (1) and the upper part of the guide component (3), the upper part of the guide component (3) is installed at the bottom of the telescopic column (2), and the lower part is installed with a rotary leveling and slag discharge component (4); a feed frame (a) is set on the tracked vehicle body (c), and a power head (b) is installed on the feed frame (a), the power head (b) being coaxial with the hole protection device (d); The specific installation method of the guide assembly (3) coaxially setting the rotary leveling and slag discharge assembly (4) includes: the self-lubricating bearing is sleeved outside the positioning cylinder (33), the driven gear (42) is coaxially set outside the self-lubricating bearing, the motor (41) is installed on the guide plate (31) to drive the driving gear (44) to rotate, and drive the driven gear (42) to rotate, the cutter head (43) is installed on the self-lubricating bearing, and the cutter head (43) is angled downwards. Multiple cutters (45) are evenly distributed; the first stop sleeve is installed on the upper part of the self-lubricating bearing, and the second stop sleeve is installed on the lower part of the positioning cylinder (33); the upper end of the self-lubricating bearing is positioned by the shoulder A, and the lower end is positioned by the threaded hole D on the positioning cylinder (33) and the through hole C on the second stop sleeve; the upper end of the driven gear (42) is positioned by the through hole E of the first stop sleeve and the threaded hole B on the self-lubricating bearing, and the lower end is positioned by the lower end shoulder of the self-lubricating bearing; the positioning cylinder (33) has symmetrical mounting slots G on the outside, and the self-lubricating bearing is installed and locked by the cooperation of the buckle H on the self-lubricating bearing and the mounting slot G; the buckle K on the second stop sleeve cooperates with the mounting slot G on the self-lubricating bearing to realize the installation and locking of the second stop sleeve.

2. The construction method of the hole protection device for open-pit mine blasting hole drilling rig according to claim 1, characterized in that, The overall capability output coefficient of the aforementioned cutter head for: （1）； In the formula: m This is the overall output coefficient of the cutterhead; The input power of the cutter head is in kW. This is the power correction factor, with a value ranging from 0.9 to 1; To improve the working efficiency of the cutter head; The actual working angle of the lever is °; Install the angle on the cutter, °; The total flow rate of drill cuttings in the borehole, in L / min; The volume ratio of drill cuttings; This is a correction factor for the amount of drill cuttings, with a value ranging from 0.9 to 1; The mounting height of the cutter is in mm; The installation length of the cutter is in mm; The actual operating speed of the cutter head is r / min; The drift speed of the drill cuttings is L / min; a This is the variable adjustment coefficient, with a value ranging from 0 to 3; b This is the variable adjustment coefficient, with a value ranging from 0 to 3; Initial selection of default tool head overall capability output coefficient The initial working angle of the tool turret can be obtained by solving the problem. and operating speed The actual working angle of the dial cutter is measured at fixed intervals. and the actual working speed of the cutter head Adjustments were made, and the particle swarm optimization algorithm was used for local optimization to obtain the optimal actual working rotation angle. and the actual working speed of the cutter head To ensure the overall output coefficient of the cutter head Reach the maximum.

3. The construction method of the hole protection device for open-pit mine blasting hole drilling rig according to claim 1 or 2, characterized in that, The specific implementation steps are as follows: 1) Move the drilling rig to the construction site, and extend the tracked vehicle body (c) under the tracked vehicle body to support the drilling rig securely; 2) The telescopic column (2) in the hole protection device (d) extends downward to contact the ground. At this time, the motor (41) drives the active gear (44) to drive the driven gear (42) to rotate, which in turn drives the cutter head (43) to rotate. At the same time, the telescopic column (2) slowly extends downward until it can no longer extend downward, flattening the area around the hole to be drilled and ensuring that the hole opening position is flat. 3) The motor (41) stops working, and the cutter head (43) stops rotating; 4) The power head (b) drives the drill rod to rotate along the feed frame (a) and move towards the hole. At this time, the guide cylinder (32) in the guide assembly (3) 3 guides the drill bit that is broken in front of the drill rod. The power head (b) starts drilling and the drill cuttings are discharged from the borehole from the guide cylinder (32). 5) After drilling is completed, the power head (b) moves the drill rod out of the borehole to the tracked vehicle body (c), and the cutter head (43) starts to rotate and slowly removes the drill cuttings attached to the periphery of the hole protection device (d). At the same time, the telescopic column (2) slowly rises, driving the cutter head (43) to rise slowly. During the rising process, the cutter head (43) rotates again to remove the scattered drill cuttings, ensuring that the drill rod will not fall into the borehole. 6) After the telescopic column (2) is raised, the tracked vehicle body (c) is retracted and the drilling rig begins to move to the next hole opening position to prepare for the construction of a new hole.

4. The construction method of the hole protection device for open-pit mine blasting hole drilling rig according to claim 1 or 2, characterized in that, The guide cylinder (32) is a conical cylinder, and the positioning cylinder (33) is a cylindrical cylinder; Furthermore, a guide ring (34) is provided at the lower edge of the guide disc (31).

5. The construction method of the hole protection device for open-pit mine blasting hole drilling rig according to claim 1 or 2, characterized in that, The telescopic component is a telescopic column (2), which includes an upper guide column (24) and a lower guide column (25) sleeved together. The upper guide column (24) and the lower guide column (25) slide up and down through a telescopic cylinder (23). The upper guide post (24) is provided with a first guide plate (26) and a second guide plate (27), and the lower guide post (25) slides along the extension direction of the first guide plate (26) and the second guide plate (27).

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