A high-altitude cold region blast hole anti-icing device and an application method thereof

Abstract

The application relates to a high-altitude cold region blast hole anti-icing device and an application method thereof, and belongs to the technical field of mine blasting. The blast hole anti-icing device comprises a heating pipe, a control system, an inductive element and a positioning assembly. The inductive element is installed on the heating pipe and is electrically connected with the control system. The heating pipe is also electrically connected with the control system. The positioning assembly comprises a ring-shaped cover plate and an expansion piece. The ring-shaped cover plate is sleeved on the heating pipe and is used for plugging the blast hole. The expansion piece is installed on the ring-shaped cover plate and is used for abutting against the inner wall of the blast hole. The application has the effect of effectively preventing the blast hole from icing.

Description

Technical Field

[0001] This application relates to the field of mining blasting, and in particular to a device for preventing icing of blast holes in high-altitude cold regions and its application method. Background Technology

[0002] Open-pit mines in western my country are mostly located in high-altitude, cold regions. Due to their high altitude, these mines experience large temperature differences between day and night. Simultaneously, these areas receive heavy rainfall in summer, leading to rainwater accumulation in the blast holes. When nighttime temperatures plummet below zero degrees Celsius, the accumulated water in the blast holes undergoes a phase change and condenses into ice, causing blockage at the bottom of the holes. Furthermore, groundwater seepage easily freezes on the inner walls of the blast holes, reducing their diameter. If explosives are charged directly into frozen blast holes, the amount of explosives required in the blasting design cannot be achieved, resulting in blasting quality that fails to meet expectations.

[0003] Currently, common methods to address the problem of icing in blast holes include secondary drilling to break the ice or sprinkling salt into the blast hole to delay the icing process. However, secondary drilling significantly increases economic and time costs, and the blast hole may re-ice if blasting is not carried out promptly. Sprinkling salt into the blast hole is not ideal in preventing icing, failing to prevent icing on the hole wall, and increases the labor intensity for workers. Neither of these methods effectively solves the problem of icing in blast holes, and a solution for efficiently preventing icing in blast holes is urgently needed. Therefore, this application proposes an anti-icing device for blast holes in high-altitude cold regions and its application method. Summary of the Invention

[0004] To address the problem of icing in blast holes in high-altitude and cold regions, this application provides, firstly, an anti-icing device for high-altitude and cold regions.

[0005] This application provides a technical solution using the following approach: It includes a heating tube, a control system, a sensing element, and a positioning assembly. The sensing element is mounted on the heating tube and electrically connected to the control system. The heating tube is also electrically connected to the control system. The positioning assembly includes an annular cover plate and an expansion member. The annular cover plate is fitted onto the heating tube and is used to seal the borehole. The expansion member is mounted on the annular cover plate to abut against the inner wall of the borehole.

[0006] By adopting the above technical solution, a heating element is placed in the borehole, and the heating element is fixed inside the borehole by expanding the expansion member. At the same time, under the action of the annular cover plate and the expansion member, external water and cold air cannot flow into the borehole through the opening. Subsequently, the control system controls the heating element to heat the borehole to prevent ice formation inside the borehole. Meanwhile, the sensing element monitors the temperature inside the borehole in real time and transmits the corresponding temperature signal to the control system. When the temperature inside the borehole is higher than the preset value range, the control system controls the heating element to cool down, so that the temperature inside the borehole is within the preset range. Similarly, when the temperature inside the borehole is lower than the preset value range, the control system controls the heating element to heat up, so that the temperature inside the borehole is also within the preset range. In the entire process, because external water and cold air are blocked and the borehole is directly heated, the temperature inside the borehole can be controlled in real time, reducing the probability of secondary icing inside the borehole and effectively solving the problem of borehole icing in plateau areas.

[0007] Optionally, the heating tube includes a heating base tube and multiple heating segments. Each heating segment has a connecting part one and a connecting part two at both ends. The connecting part one on any heating segment can be detachably connected to the heating base tube. The connecting parts one and connecting parts two on two adjacent heating segments can also be detachably connected.

[0008] By adopting the above technical solution, the heating tube includes a heating base tube and multiple heating segments, and any one of the multiple heating segments can be connected to the heating base tube, and the heating segments can also be connected to each other. This allows the operator to increase or decrease the number of heating segments installed on the heating base tube according to the depth of the borehole, so that the length of the heating tube can be adjusted with the depth of the borehole, thereby making the heating tube suitable for boreholes of different depths and increasing the applicability of the heating tube.

[0009] Optionally, heating elements are provided on the outer walls of the heating base tube and each heating segment. Each heating element is electrically connected to the control system. The number of sensing elements corresponds to the sum of the number of heating base tubes and heating segments. Each sensing element is installed on the heating base tube and each heating segment and is electrically connected to the control system.

[0010] By adopting the above technical solution, the control system can monitor the temperature changes at different depths inside the borehole through the heating base tube and the sensing elements on each heating segment. At the same time, the control system can also adjust the heating degree of the heating base tube and the heating elements on each heating segment, thereby achieving temperature control at various locations inside the borehole and playing the role of accurately regulating the temperature inside the borehole.

[0011] Optionally, the expansion component is an annular airbag. The annular cover plate is provided with air holes communicating with the expansion component. The inner ring of the annular cover plate is provided with multiple fixing plates. The annular cover plate is provided with sliding grooves corresponding to the number of fixing plates. The sliding grooves extend perpendicularly to the axis of the annular cover plate. Each sliding groove is provided with a sliding strip. One end of the sliding strip is connected to the fixing plate by a ball joint, and the other end of the sliding strip is located in the sliding groove. Each fixing plate is also connected to the inner ring of the expansion component. An annular limiting plate is provided on the outer wall of the heating base tube. The annular limiting plate can abut against the side of the annular cover plate away from the blast hole.

[0012] By employing the above technical solution, compressed air is injected into the vent, causing the annular airbag to expand. This allows the outer wall of the annular airbag to press against the inner wall of the borehole, thus fixing the position of the annular cover plate. Simultaneously, as the annular airbag expands, each fixing plate moves towards the axis of the annular cover plate until it presses against the outer wall of the heating base tube. Since the fixing plates are ball-jointed with sliding strips that can slide in sliding grooves, and the extension direction of the sliding grooves is perpendicular to the axis of the annular cover plate, the annular cover plate can be adapted to heating base tubes of different diameters, thus increasing the applicability of the annular cover plate. The annular limiting plate on the heating base tube is used to block the gaps between the fixing plates, preventing cold air and water from entering the borehole through the gaps between the fixing plates.

[0013] Optionally, a water pumping pipe is coaxially installed in the heating base tube and each heating section, and the water pumping pipes can be connected to each other by plug-in connection.

[0014] By adopting the above technical solution, when the heating base tube and heating segment, as well as two adjacent heating segments are assembled, the water pumping pipe on the heating base tube can be connected to the water pumping pipe on the heating segment through a plug-in connection. When two heating segments are connected, their water pumping pipes are also connected through a plug-in connection, so that a whole spliced ​​water pumping pipe is coaxially installed inside the heating tube. This allows the water accumulated in the borehole to be pumped out by connecting a water pump to the water pumping pipe on the heating base tube.

[0015] Optionally, the annular limiting plate includes an annular plate and an elastic element, the elastic element being disposed on the inner wall of the annular plate and connected to the outer wall of the heating base tube.

[0016] By adopting the above technical solution, the annular limiting plate includes an annular plate and a limiting elastic element. The elastic element is disposed on the inner wall of the annular plate and is connected to the outer wall of the heating base tube. This allows the heating base tube to enter the borehole with its axis parallel to the borehole axis under the elastic action of the elastic element when one end of the heating base tube is located inside the borehole.

[0017] Optionally, a limiting assembly is provided on the annular cover plate. The limiting assembly includes a limiting ring, a mounting base, an adjusting component, and a limiting plate. The limiting ring is coaxially mounted on the annular cover plate and can rotate around the axis of the annular cover plate. The number of adjusting components and limiting plates corresponds to the number of mounting bases. At least two mounting bases are provided, and both are mounted on the limiting ring. The line connecting the two mounting bases passes through the center of the limiting ring. The adjusting component is mounted on the mounting base by a threaded engagement. The adjusting component and the limiting plate are connected by a ball joint. The side of the limiting plate away from the adjusting component can fit against the outer wall of the heating base tube.

[0018] By adopting the above technical solution, when an angle is formed between the annular cover plate and the axis of the borehole, the heating base tube can be adjusted by the expansion and contraction of the elastic element, so that the heating base tube can be kept as coaxial as possible with the borehole. At the same time, by turning the adjusting element, the adjusting element can push the limiting plate to fit against the outer wall of the heating base tube, so that the axis of the heating base tube will not shift after being parallel to the axis of the borehole due to the rebound of the elastic element, thus further fixing the position of the heating base tube. Meanwhile, the limiting ring allows the limiting plate to abut at different positions on the outer wall of the heating base tube, so that no matter which direction the heating base tube has a tendency to shift, the abutment position of the outer wall of the heating base tube can be adjusted by adjusting the adjusting plate, further increasing the installation stability of the heating base tube.

[0019] Optionally, a positioning element is provided on the annular cover plate. The positioning element is connected to the annular cover plate by means of thread engagement, and the positioning element can abut against the limit ring.

[0020] By adopting the above technical solution, tightening the positioning component prevents the limiting ring from easily rotating on the annular cover plate, thereby preventing the position of the mounting seat on the annular cover plate from easily changing.

[0021] Secondly, this application also provides a method for applying an anti-icing device for blast holes in high-altitude cold regions, comprising the following steps: S100: After the borehole is drilled, insert the heating pipe into the borehole and at the same time, press the annular cover plate tightly against the ground around the borehole. S200: The expansion component expands, thereby pressing the expansion component against the inner wall of the borehole, thus fixing the heating tube inside the borehole and preventing external cold air from entering the borehole. S300: The heating element is activated by the control system to increase the temperature inside the borehole and prevent icing. The control system adjusts the operating temperature of the heating element in real time by sensing the temperature signal through the sensing element. S400: When the blasting charge is about to be applied, remove the heating tube from the borehole, and then fill the borehole with an appropriate amount of explosive to blast it.

[0022] In summary, this application includes at least the following beneficial technical effects: 1. By placing the heating tube in the borehole and fixing its position inside the borehole with an annular cover plate and expansion joint, while preventing external cold air and water from entering the borehole, the temperature inside the borehole is then regulated by sensing elements and a control system, reducing the probability of icing inside the borehole and effectively solving the problem of icing in boreholes in plateau areas.

[0023] 2. The heating tube includes a heating base tube and multiple heating segments, any one of which can be connected to the heating base tube, and the heating segments can also be connected to each other. This allows the operator to increase or decrease the number of heating segments installed on the heating base tube according to the depth of the borehole, thereby allowing the length of the heating tube to be adjusted to follow the depth of the borehole. This makes the heating tube suitable for boreholes of different depths, thus increasing the applicability of the heating tube.

[0024] 3. By setting a limiting component, the axis of the heating base tube and heating segment can form an angle with the axis of the annular cover plate when they are inserted into the annular cover plate. Therefore, even when the opening angle of each borehole is different (i.e., there is an angle between the axis of the borehole and the axis of the annular cover plate and the angle is different), the heating base tube and heating segment can be inserted into the borehole as coaxially as possible by adjusting the insertion angle of the heating base tube and heating segment on the annular cover plate. This ensures that the outer wall of the heating segment in the borehole can be kept as close as possible to the inner wall of the borehole, thereby achieving uniform heating of the borehole and improving the heating quality. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of an anti-icing device for blast holes in high-altitude cold regions according to Embodiment 1 of this application; Figure 2 yes Figure 1 The left view; Figure 3 yes Figure 2 A schematic diagram of the cross-section after cutting along point AA in the middle; Figure 4 This is a three-dimensional schematic diagram of an anti-icing device for blast holes in high-altitude cold regions according to Embodiment 2 of this application; Figure 5 yes Figure 4 The left view; Figure 6 yes Figure 5 A cross-sectional view of the heated base tube after it has been cut open at point BB. Figure 7 yes Figure 5 A schematic diagram showing the connection between two adjacent heating segments after being cut open at point BB.

[0026] Explanation of reference numerals in the attached drawings: 1. Heating tube; 2. Control system; 3. Sensing element; 4. Annular cover plate; 5. Expansion component; 6. Heating base tube; 7. Heating segment; 8. Connecting part one; 9. Connecting part two; 10. Heating component; 11. Annular airbag; 12. Fixing plate; 13. Air hole; 14. Sliding groove; 15. Sliding strip; 16. Annular limiting plate; 17. Annular plate; 18. Elastic component; 19. Limiting assembly; 20. Limiting ring; 21. Mounting base; 22. Adjusting component; 23. Limiting plate; 24. Positioning component; 25. Water pumping pipe; Detailed Implementation The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0027] Example 1 This application discloses an anti-icing device for boreholes in high-altitude cold regions, referring to... Figure 1 and Figure 2 The system includes a heating tube 1, a control system 2, a sensing element 3, and a positioning assembly. The positioning assembly includes an expansion member 5 and an annular cover plate 4. The expansion member 5 is an annular airbag 11. An air hole 13 communicating with the airbag is provided on the annular cover plate 4. The heating tube 1 passes through the annular cover plate 4, and the expansion member 5 is installed on the lower surface of the annular cover plate 4. This allows the annular cover plate 4 to cover the ground surface around the borehole when the heating tube 1 is located inside the borehole. Subsequently, compressed air can be injected into the air hole 13 to expand the expansion member 5, so that the expansion member 5 is pressed against the inner wall of the borehole. This allows the expansion member 5 to prevent cold air and water from entering the borehole after it expands horizontally, and also to fix the position of the heating tube 1 inside the borehole.

[0028] Reference Figure 2 and Figure 3The heating tube 1 includes a heating base tube 6 and multiple heating segments 7. The heating base tube 6 is mounted on an annular cover plate 4. Each end of a heating segment 7 has a connecting part 1 8 and a connecting part 2 9. The connecting part 1 8 has an internal thread, while the connecting part 2 9 has an external thread. Correspondingly, the outer wall of the end of the heating base tube 6 that extends into the borehole has an external thread adapted to the connecting part 1 8. This allows the connecting part 1 8 on any heating segment 7 to be connected to the heating base tube 6 via a threaded connection. Furthermore, the multiple heating segments 7 can be connected through different heating... The connecting part 8 and the connecting part 9 on segment 7 are connected by a threaded fit. This allows the operator to add or remove heating segments 7 installed on the heating base tube 6 according to the depth of the borehole. This allows the heating base tube 6 to be combined with different numbers of heating segments 7, thus making it suitable for boreholes of different depths. Furthermore, the outer walls of the heating base tube 6 and each heating segment 7 are covered with an antifreeze film. This prevents the heating base tube 6 and heating segments 7 from freezing inside the borehole and becoming difficult to retrieve when they are subsequently pulled out.

[0029] Furthermore, multiple sensing elements 3 are provided, the number of which corresponds to the sum of the number of heating base tubes 6 and heating segments 7. Multiple sensing elements are respectively installed on the heating base tubes 6 and heating segments 7. The sensing elements 3 are temperature sensors, and each sensing element 3 is electrically connected to the control system 2. Heating elements 10 are also provided on the heating base tubes 6 and heating segments 7. The heating elements 10 on the heating base tubes 6 and each heating segment 7 are also electrically connected to the control system 2. This allows the control system 2 to individually adjust the temperature of the heating base tubes 6 and each heating segment 7 based on the temperature signals fed back by the temperature sensors on the heating base tubes 6 and each heating segment 7, thereby realizing individual temperature adjustment at different depths within the borehole.

[0030] The implementation principle of Embodiment 1 of this application is as follows: First, the depth of the borehole is measured. Then, an annular cover plate 4 with an expansion member 5 installed is placed over the borehole surface. At this time, the expansion member 5 is located inside the borehole. Then, a heating segment is inserted through the annular cover plate 4. Next, compressed air is injected into the air hole 13 to expand the expansion member 5. After the expansion member 5 expands, the outer wall of the heating segment 7 will not change its height because it is pressed against the expansion member 5. Then, other heating segments 7 are installed on the heating segment 7. After the installation is completed, the compressed air is extracted from the air hole 13, so that the initial expansion member 5 is fixed in place. The heating segment 7 at a fixed height descends into the borehole, and then the expansion member 5 expands again, so that the height of the subsequently installed heating segment 7 can be fixed by the expansion member 5. Then, the heating segment 7 is added again, and so on, until the heating base tube 6 is connected to the heating segment 7. Then, the expansion member 5 is pressed against the outer wall of the heating base tube 6, realizing the lowering of the entire heating tube 1 into the borehole. Subsequently, the heating base tube 6 and the heating member 10 on the heating segment 7 can be controlled by the control system 2 to start working, so that the temperature inside the borehole can be kept in a state that does not freeze, thereby achieving the effect of preventing the borehole from freezing.

[0031] Example 2 Reference Figure 4 , Figure 5 and Figure 6 The difference between Embodiment 2 and Embodiment 1 is that the annular cover plate 4 is provided with a limiting component 19 for adjusting the position of the heating base tube 6, a fixing plate 12 and a sliding strip 15 that cooperate with the limiting component 19, and a water pumping pipe 25.

[0032] Reference Figure 4 and Figure 6 Multiple sliding grooves 14 are distributed circumferentially on the lower surface of the annular cover plate 4. The extending direction of the multiple sliding grooves 14 is perpendicular to the axis of the annular cover plate 4. Multiple fixing plates 12 are provided and are all located in the inner circle of the annular cover plate 4. The multiple fixing plates 12 are distributed circumferentially in the inner circle of the annular cover plate 4. A sliding strip 15 is connected to the side of each fixing plate 12 near the annular cover plate 4 by ball joint. The end of the sliding strip 15 away from the fixing plate 12 is located in the sliding groove 14. Meanwhile, the part of the fixing plate 12 that is not connected to the sliding strip 15 is connected to the expansion member 5. The inner ring connection allows each fixing plate 12 to move towards the axis of the annular cover plate 4 when the expansion member 5 is inflated. This enables each fixing plate 12 to press against the outer wall of the heating base tube 6. This allows the annular cover plate 4 to accommodate heating base tubes 6 and heating segments 7 of different diameters within a certain range, thus widening the range of diameter selection for both the heating base tube 6 and the heating segments 7. This ensures that the heating base tube 6 and each heating segment 7 fit more closely to the inner wall of the borehole during operation, thereby guaranteeing heating quality.

[0033] An annular limiting plate 16 is provided on the heating base tube 6. The annular limiting plate 16 includes an annular plate 17 and an elastic element 18. The elastic element 18 can be made of rubber and is located in the inner ring of the annular limiting plate 16. The elastic element 18 is also annular. The outer ring of the elastic element 18 is fixedly connected to the inner ring of the annular limiting plate 16, and the inner ring of the elastic element 18 is fixedly connected to the outer wall of the heating base tube 6. When the heating base tube 6 passes between multiple fixing plates 12 on the annular cover plate 4, the elastic element 18 and the annular limiting plate 16 abut against the upper surface of the annular cover plate 4, thereby covering the gap between two adjacent fixing plates 12, thus preventing external water and cold air from entering the borehole. At the same time, since the fixing plate 12 and the sliding strip 15 are connected by a ball joint, and the heating base tube 6 and the annular limiting plate 17 are fixedly connected, the elastic element 18 and the annular limiting plate 16 are fixedly connected to the outer wall of the heating base tube 6. An elastic element 18 is provided between the 6 sections. This allows the operator to change the angle between the heating base tube 6 and the annular cover plate 4 when the axis of the borehole intersects with the axis of the annular cover plate 4 when it is sealed outside the borehole (for example, when the annular cover plate 4 covers a gentle slope, but the axis of the borehole is perpendicular to the ground). This allows the operator to bend the heating base tube 6 so that when the heating base tube 6 is installed on the annular cover plate 4, the axis of the heating base tube 6 can be kept as coaxial as possible with the axis of the borehole. This ensures that the distance between the heating base tube 6 and the heating segment 7 and the inner wall of the borehole is kept within a reasonable range. This allows the heating element 10 on the heating base tube 6 and the heating segment 7 to heat the inner wall of the borehole evenly. This enables the heating base tube 6 and the heating segment 7 to maintain a good heating effect on the borehole under different working conditions.

[0034] Furthermore, to prevent the heating base tube 6 from changing position due to the rebound of the elastic element 18, a limiting component 19 is provided on the upper surface of the annular cover plate 4. The limiting component 19 includes a limiting ring 20, a mounting base 21, an adjusting element 22, and a limiting plate 23. The limiting ring 20 is embedded in the annular cover plate 4 and can rotate around the axis of the annular cover plate 4. There are two mounting bases 21, and two adjusting elements 22 and two limiting plates 23. The two mounting bases 21 are respectively fixedly mounted on the limiting ring 20 and can rotate around the axis of the annular cover plate 4 together with the limiting ring 20. The connection between the two mounting bases 21 is... The wire passes through the center of the annular cover plate 4, and the two adjusting parts 22 are respectively mounted on the two mounting seats 21 and connected to the mounting seats 21 by threaded engagement. The two limiting plates 23 are respectively connected to the ends of the two adjusting parts 22 near the axis of the annular cover plate 4 by ball joint. This allows the limiting plate 23 to be adjusted to the contact position with the outer wall of the heating base tube 6 by rotating the limiting ring 20 when the axis between the heating base tube 6 and the annular cover plate 4 is offset. Then, the two limiting plates 23 are pressed together on both sides of the offset direction of the heating base tube 6 by turning the adjusting part 22, thereby fixing the position of the heating base tube 6.

[0035] Reference Figure 5 and Figure 6 In order to fix the position of the limiting ring 20 on the annular cover plate 4, a positioning element 24 is also provided on the annular cover plate 4. The positioning element 24 is a bolt, and the positioning element 24 is connected to the annular cover plate 4 by threaded engagement. The end of the positioning element 24 can abut against the limiting ring 20. This allows the operator to fix the position of the limiting ring 20 on the annular cover plate 4 by tightening the positioning element 24, thereby reducing the probability that the limiting ring 20 will rotate around the axis of the annular cover plate 4 when the two limiting plates 23 are pressed against the heating base tube 6.

[0036] Reference Figure 6 and Figure 7 Each heating base pipe 6 and each heating segment 7 is equipped with a water pumping pipe 25. Any two water pumping pipes 25 can be connected end to end by a plug-in connection. When a heating segment 7 is installed on the heating base pipe 6, the water pumping pipe 25 in the heating base pipe 6 and the water pumping pipe 25 on the heating segment 7 are plugged in. Similarly, when two heating segments 7 are connected, the two water pumping pipes 25 on them are also connected by a plug-in connection. This allows the water accumulated at the bottom of the borehole to be pumped out through the drain pipes on the heating base pipe 6 and each heating segment 7 by connecting the water pump to the heating base pipe 6, thus keeping the borehole as dry as possible.

[0037] The implementation principle of Embodiment 2 of this application is as follows: First, the depth of the borehole is measured, and an annular cover plate 4 is laid on the ground around the borehole. Then, any heating segment 7 is inserted through the annular cover plate 4, causing the annular airbag 11 to inflate. At this time, the annular airbag 11 pushes the fixing plate 12 to abut against the outer wall of the heating segment 7, thereby fixing the height of the heating segment 7. Subsequently, other heating segments 7 are installed on the upper end of the heating segment 7. After the installation is completed, the air in the annular airbag 11 is evacuated, thereby causing the heating segment 7 to descend in the borehole. This process is repeated until the heating base tube 6 is connected to the heating segment 7. Then, the annular airbag 11 is pressed tightly against the outer wall of the heating base tube 6, and the annular limiting plate 16 on the heating base tube 6 abuts against the annular cover plate 4. Thus, the lowering of the entire heating tube 1 is completed. This also avoids the situation where the heating tube 1 is too long to be placed in the borehole due to the pre-assembly of the heating base tube 6 and the heating segment 7. Next, the limiting ring 20 is adjusted so that the limiting plate 23 is located in the offset direction of the axis of the heating base tube 6. Then, the adjusting part 22 is tightened so that the limiting plate 23 is pressed against the outer wall of the heating base tube 6. At this time, the axis of the heating base tube 6 is as parallel as possible to the axis of the borehole. Then, compressed air is injected into the annular air bag 11 so that the annular air bag 11 is pressed against the inner wall of the borehole. At this time, the fixing plate 12 is pushed out. Since the fixing plate 12 and the sliding strip 15 are connected by ball joint, the fixing plate 12 can also fit against the outer wall of the heating base tube 6. Then, the heating base tube 6 and each heating segment 7 are controlled by the control system 2 to heat the borehole.

[0038] Example 3 This application provides a method for applying the anti-icing device for blast holes in high-altitude cold regions as described in Embodiments 1 and 2 above, including the following steps: S100: After the borehole is drilled, the heating pipe 1 is placed inside the borehole through the annular cover plate 4, and the lower surface 4 of the annular cover plate is pressed tightly against the ground around the borehole. S300: Insert any heating segment 7 into the annular cover plate 4, and at the same time inflate the expansion member 5 to fix the heating segment 7 inserted into the annular cover plate 4. S400: Assemble another heating segment 7 with the heating segment 7 fixed by the expansion member 5, then extract the air from the expansion member 5 so that the height of the heating segment 7 previously fixed by the expansion member 5 can drop in the borehole. When the other heating segment 7 passes through the annular cover plate 4, the expansion member 5 expands again, thereby fixing the height of the other heating segment 7. S500: Repeat step S400 until the total length of each heating segment 7 matches the depth of the borehole. Then connect the heating base tube 6 to the heating segment 7 currently fixed by the expansion member 5, and make the outer wall of the heating base tube 6 be pressed against by the expansion member 5. S600: The water in the borehole is drained by connecting the water pump to the end of the water pumping pipe 25 on the heating base pipe 6. S700: The heating tube 1 is started by the control system 2, thereby increasing the temperature inside the borehole and preventing the borehole from freezing. The control system 2 adjusts the working temperature of the heating tube 1 in real time by sensing the temperature signal through the sensing element 3. S800: When the blasting charge is about to be applied, remove the heating tube 1 from the borehole, and then fill the borehole with an appropriate amount of explosive to blast it.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A device for preventing icing of boreholes in high-altitude cold regions, characterized in that: The device includes a heating tube (1), a control system (2), a sensing element (3), and a positioning assembly. The sensing element (3) is mounted on the heating tube (1) and electrically connected to the control system (2). The heating tube (1) is also electrically connected to the control system (2). The positioning assembly includes an annular cover plate (4) and an expansion member (5). The annular cover plate (4) is sleeved on the heating tube (1) and is used to seal the borehole. The expansion member (5) is mounted on the annular cover plate (4) and is used to abut against the inner wall of the borehole. The heating tube (1) includes a heating base tube (6) and multiple heating segments (7). Each end of the heating segment (7) is provided with a connecting part one (8) and a connecting part two (9). The connecting part one (8) on any heating segment (7) can be detachably connected to the heating base tube (6). The connecting parts one (8) and connecting parts two (9) on two adjacent heating segments (7) can also be detachably connected. The expansion member (5) is an annular airbag (11). The annular cover plate (4) is provided with an air hole (13) communicating with the expansion member (5). The inner ring of the annular cover plate (4) is provided with multiple fixing plates (12). The annular cover plate (4) is provided with a number of sliding grooves (14) corresponding to the number of fixing plates (12). The sliding grooves (14) extend perpendicularly to the axis of the annular cover plate (4). Each sliding groove (14) is provided with a sliding strip (15). One end of the sliding strip (15) is connected to the fixing plate (12) by a ball joint. The other end of the sliding strip (15) is located in the sliding groove (14). Each fixing plate (12) is also connected to the inner ring of the expansion member (5). The outer wall of the heating base tube (6) is provided with an annular limiting plate (16). The annular limiting plate (16) can abut against the side of the annular cover plate (4) away from the blast hole. A limiting component (19) is provided on the annular cover plate (4). The limiting component (19) includes a limiting ring (20), a mounting base (21), an adjusting member (22), and a limiting plate (23). The limiting ring (20) is coaxially arranged on the annular cover plate (4) and can rotate around the axis of the annular cover plate (4). The number of the adjusting member (22) and the limiting plate (23) corresponds to the number of the mounting bases (21). There are at least two mounting bases (21) and they are all installed on the limiting ring (20). The line connecting the two mounting bases (21) passes through the center of the limiting ring (20). The adjusting member (22) is installed on the mounting base (21) by means of threaded engagement. The adjusting member (22) and the limiting plate (23) are connected by means of ball joint. The side of the limiting plate (23) away from the adjusting member (22) can fit against the outer wall of the heating base tube (6).

2. The anti-icing device for blast holes in high-altitude cold regions according to claim 1, characterized in that: Heating elements (10) are provided on the outer walls of the heating base tube (6) and each heating segment (7). Each heating element (10) is electrically connected to the control system (2). The number of sensing elements (3) corresponds to the sum of the number of heating base tubes (6) and heating segments (7). Each sensing element (3) is installed on the heating base tube (6) and each heating segment (7) and is electrically connected to the control system (2).

3. The anti-icing device for blast holes in high-altitude cold regions according to claim 2, characterized in that: The heating base tube (6) and each of the heating sections (7) are coaxially equipped with a water pumping pipe (25), and each of the water pumping pipes (25) can be connected to each other by plug-in connection.

4. The anti-icing device for blast holes in high-altitude cold regions according to claim 1, characterized in that: The annular limiting plate (16) includes an annular plate (17) and an elastic element (18). The elastic element (18) is disposed on the inner wall of the annular plate (17) and is connected to the outer wall of the heating base tube (6).

5. The anti-icing device for blast holes in high-altitude cold regions according to claim 1, characterized in that: The annular cover plate (4) is provided with a positioning element (24), which is connected to the annular cover plate (4) by a threaded connection, and the positioning element (24) can abut against the limiting ring (20).

6. A method for applying an anti-icing device for blast holes in high-altitude cold regions, comprising the anti-icing device for blast holes in high-altitude cold regions as described in any one of claims 1-5, characterized in that: The process includes the following steps: S100: After the borehole is drilled, the heating tube (1) is inserted into the borehole, and the annular cover plate (4) is pressed tightly against the ground around the borehole; S200: The expansion member (5) is expanded so that the expansion member (5) is pressed against the inner wall of the borehole, thus fixing the heating tube (1) in the borehole and preventing cold air from entering the borehole; S300: The heating tube (1) is started by the control system (2) to increase the temperature in the borehole and prevent the borehole from freezing. The control system (2) adjusts the working temperature of the heating tube (1) in real time by sensing the temperature signal through the sensing element (3); S400: When the blasting charge is about to be completed, the heating tube (1) is taken out from the borehole, and then a reasonable amount of explosive is filled into the borehole to blast it.

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