Safety protection device for vertical shaft blasting

Abstract

The utility model provides a vertical shaft blasting safety protection device, which relates to the technical field of vertical shaft blasting construction, and particularly structurally comprises a protective cover, a bottom support ring is fixedly arranged at the bottom of the protective cover, and a plurality of first fixing piles are fixedly arranged at the bottom of the bottom support ring; the top of the protective cover is fixedly provided with an additional pressure box with the top open, the side wall of the additional pressure box is fixedly provided with a plurality of tensioning ropes, the ends, away from the additional pressure box, of the tensioning ropes are fixedly provided with tensioning brackets, and the bottoms of the tensioning brackets are fixedly provided with second fixing piles. The heavy pressure box is adopted as a heavy structure, so that a sandbag or a gravel block is not prone to collapsing or falling off, the working intensity of constructors is relieved, meanwhile, a tensioning structure for the protective cover to face the ground is arranged, the stability of the protective cover is improved, the protective cover is not prone to bouncing off from a well mouth, and the safety of vertical shaft blasting is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of shaft blasting construction, in particular to a shaft blasting safety protection device. Background Art

[0002] There are two main construction techniques for shaft excavation: the first is the comprehensive mechanized method, which uses large drilling machinery to drill the shaft; the second is the rock drilling and blasting method, which is the only effective and economical method when the rock strength factor f>6. Blasting inevitably produces flying debris, and in open-pit blasting, some rock can fly far away and endanger nearby personnel. Therefore, shaft blasting safety devices are installed during shaft blasting.

[0003] The existing shaft blasting safety protection device basically adopts a protective top or protective cover. Sandbags are laid on the top of the protective top as additional weight to cover the shaft for protection. However, in actual use, it is found that the sandbags laid flat on the protective top will collapse after blasting, which increases the work intensity of the construction workers. Moreover, simply relying on the downward pressure of the sandbags cannot ensure the use strength of the protection device. Since the air pressure in the shaft is relatively high at the moment of blasting, it is easy to bounce the protective top upward, resulting in weakened protection and low safety. Utility Model Content

[0004] This utility model provides a shaft blasting safety protection device, aiming to address at least one of the problems with existing shaft blasting safety protection devices mentioned in the background art. This device utilizes a weighted pressure box as the weighted structure, preventing sandbags or gravel from collapsing or falling, thereby reducing the workload of construction workers. Furthermore, a structure for tightening the protective shield toward the ground increases its stability, preventing it from bouncing away from the wellhead, and improving safety during shaft blasting.

[0005] The present invention provides the following technical solutions to achieve the above objectives:

[0006] A shaft blasting safety protection device includes a protective cover, a bottom supporting ring is fixedly provided at the bottom of the protective cover, and a plurality of first fixing piles are fixedly provided at the bottom of the bottom supporting ring; a weight pressure box with an open top is fixedly provided at the top of the protective cover, a plurality of tensioning ropes are fixedly provided on the side walls of the weight pressure box, a tensioning support is fixedly provided at one end of the tensioning rope away from the weight pressure box, and a second fixing pile is fixedly provided at the bottom of the tensioning support.

[0007] In the aforementioned shaft blasting safety protection device, the side wall of the attached weight pressure box and the top of the tensioning bracket are respectively fixed with a first hanging rope ear and a second hanging rope ear.

[0008] In the aforementioned shaft blasting safety protection device, a plurality of annular reinforcement plates are fixedly provided on the side walls of the protective cover from top to bottom.

[0009] In the aforementioned shaft blasting safety protection device, a plurality of ventilation holes are provided on the top of the side wall of the protective cover.

[0010] In the aforementioned shaft blasting safety protection device, the vent hole is located on one side of the opening outside the protective cover and is inclined upward.

[0011] In the aforementioned shaft blasting safety protection device, the protective cover is made of a carbon steel cover body.

[0012] In the aforementioned shaft blasting safety protection device, the tensioning rope is a steel wire rope.

[0013] In the aforementioned shaft blasting safety protection device, an additional weight is placed in the additional weight pressure box.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] 1. The utility model provides an additional weight pressure box on the top of the protective cover, and the top of the additional weight pressure box is open, which can provide storage space for sandbags or gravel, and the sandbags or gravel are not easy to collapse or fall, thereby reducing the work intensity of construction workers.

[0016] 2. The utility model uses a tensioning rope and a tensioning bracket arranged on the side wall of the attached weight pressure box. The tensioning bracket is expanded outward and fixed to the ground through a second fixing pile. At the same time, the tensioning rope is tightened. At this time, the tensioning rope can provide a tensioning external force toward the ground to the attached weight pressure box, which can ensure that the protective cover can withstand a large air pressure during the blasting process, making it difficult for the protective cover to bounce off the shaft mouth, thereby improving the safety of shaft blasting.

[0017] 3. The utility model increases the stability of the protective cover installed at the shaft opening by providing a bottom support ring and a first fixing pile at the bottom of the protective cover, placing the bottom support at the periphery of the shaft opening, and then inserting the first fixing pile into the soil outside the shaft opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below only relate to some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort.

[0019] Figure 1 This is a schematic diagram of the top structure of the utility model;

[0020] Figure 2 for Figure 1A schematic cross-sectional view of the utility model showing the plane where the two tensioning ropes on the left and right sides are located;

[0021] Figure 3 This is a schematic diagram of the arrangement structure of the first fixed pile on the bottom supporting ring in the upward direction;

[0022] Figure 4 Schematic diagram of the connection structure between the annular reinforcement plate and the protective cover in the top view;

[0023] Figure numerals: 1-protective cover; 2-bottom supporting ring; 3-first fixed pile; 4-attached weight box; 5-tensioning rope; 6-tensioning bracket; 7-second fixed pile; 8-first hanging rope ear; 9-second hanging rope ear; 10-annular reinforcement plate; 11-ventilation hole. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0025] Example 1, a shaft blasting safety protection device, the structure of which is referenced Figure 1-3 As shown, it includes a protective cover 1, a bottom supporting ring 2 is fixedly provided at the bottom of the protective cover 1, and a plurality of first fixing piles 3 are fixedly provided at the bottom of the bottom supporting ring 2; a top of the protective cover 1 is fixedly provided with an attached weight pressure box 4 with an open top, and a plurality of tensioning ropes 5 are fixedly provided on the side wall of the attached weight pressure box 4, and a tensioning bracket 6 is fixedly provided at the end of the tensioning rope 5 away from the attached weight pressure box 4, and a second fixing pile 7 is fixedly provided at the bottom of the tensioning bracket 6.

[0026] Among them, the protective cover 1 adopts a carbon steel cover body, which has strong explosion-proof properties and is not easy to damage; multiple first fixed piles 3 and multiple tensioning ropes 5 are evenly distributed; according to the usage scenario, additional weights can be placed in the additional weight pressure box 4, and the additional weights can be sandbags or gravel; the tensioning ropes 5 are steel wire ropes.

[0027] When the device is used, the bottom supporting ring 2 is first placed at the periphery of the shaft wellhead, and the first fixing pile 3 is driven into the ground outside the shaft to increase the stability of the protective cover 1 at the wellhead. Then the weight of the sandbag or gravel can be added to the top of the protective cover 1, thereby increasing the stability of the protective cover 1 at the shaft wellhead, and the sandbag or gravel is not easy to collapse or fall, thereby reducing the work intensity of the construction workers; then the tensioning bracket 6 is unfolded outward and fixed to the ground through the second fixing pile 7, and the tensioning rope 5 is tightened. At this time, the tensioning rope 5 can provide a tensioning external force toward the ground to the attached weight pressure box 4, thereby increasing the structural strength of the protective cover 1, and can ensure that the protective cover 1 can withstand a large air pressure during the blasting process, so that the protective cover 1 is not easy to bounce off the shaft wellhead, and the rocks generated by the blasting are blocked by the protective cover 1 to prevent the rocks from flying, thereby improving the safety of the shaft blasting.

[0028] Furthermore, when this device is implemented, in order to enable the two ends of the tensioning rope 5 to be connected to the side walls of the attached weight pressure box 4 and the tensioning bracket 6, the side walls of the attached weight pressure box 4 and the top of the tensioning bracket 6 are respectively fixed with a first hanging rope ear 8 and a second hanging rope ear 9, and the two ends of the tensioning rope 5 are respectively fixedly connected to the first hanging rope ear 8 and the second hanging rope ear 9.

[0029] Furthermore, when the device is implemented, in order to enable the gas inside the protective cover 1 to be discharged, as shown in FIG. Figure 1 As shown, a plurality of evenly distributed air vents 11 are provided on the top of the side wall of the protective cover 1, and the air vents 11 are located on one side of the outside of the protective cover 1 and are tilted upward. During the blasting process, the internal air pressure of the protective cover 1 is relatively high. At this time, the gas inside the protective cover 1 can be discharged through the air vents 11 to ensure that the air pressure inside and outside the protective cover 1 is balanced.

[0030] Example 2, a shaft blasting safety protection device, this example is based on Example 1, such as Figure 2 and 4 As shown, in order to increase the structural strength of the protective cover 1, the side wall of the protective cover 1 of this embodiment is fixed with a plurality of evenly distributed annular reinforcement plates 10 from top to bottom. The annular reinforcement plates 10 can form a stronger reinforcement structure on the side wall of the protective cover 1, so that the protective cover 1 is not easily deformed when subjected to a large impact force, thereby increasing the explosion-proof performance of the protective cover 1.

[0031] Obviously, the above description is only a partial embodiment of the present invention, and not all embodiments. The above embodiments are not intended to limit the present invention. For those skilled in the art, various modifications and variations of the present invention are possible. Any combination, modification, equivalent replacement, improvement, and other embodiments that can be made by those of ordinary skill in the art within the spirit and principles of the present invention shall be within the scope of protection of the present invention.

Claims

1. A shaft blasting safety protection device, characterized by: The invention comprises a protective cover (1), wherein a bottom supporting ring (2) is fixedly provided at the bottom of the protective cover (1), and a plurality of first fixing piles (3) are fixedly provided at the bottom of the bottom supporting ring (2); a weight-bearing pressure box (4) with an open top is fixedly provided at the top of the protective cover (1), a plurality of tensioning ropes (5) are fixedly provided on the side wall of the weight-bearing pressure box (4), a tensioning support seat (6) is fixedly provided at one end of the tensioning rope (5) away from the weight-bearing pressure box (4), and a second fixing pile (7) is fixedly provided at the bottom of the tensioning support seat (6).

2. The shaft blasting safety protection device according to claim 1, characterized in that: A first hanging rope ear (8) and a second hanging rope ear (9) are fixedly provided on the side wall of the attached weight pressure box (4) and the top of the tensioning bracket (6), respectively.

3. The shaft blasting safety protection device according to claim 1, characterized in that: A plurality of annular reinforcement plates (10) are fixedly provided on the side wall of the protective cover (1) from top to bottom.

4. The shaft blasting safety protection device according to claim 1, characterized in that: A plurality of ventilation holes (11) are provided on the top of the side wall of the protective cover (1).

5. The shaft blasting safety protection device according to claim 4, characterized in that: The vent hole (11) is located on one side of the outside of the protective cover (1) and is tilted upward.

6. The shaft blasting safety protection device according to any one of claims 1 to 5, characterized in that: The protective cover (1) adopts a carbon steel cover body.

7. The shaft blasting safety protection device according to any one of claims 1 to 5, characterized in that: The tensioning rope (5) is a steel wire rope.

8. The shaft blasting safety protection device according to any one of claims 1 to 5, characterized in that: The attached weight pressure box (4) is provided with an attached weight.

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