Blast hole protection device for stone cutting blasting close to high-voltage line

Abstract

The utility model provides a blast hole protection device for blasting of a stone cutting close to a high-voltage line, which comprises a plugging bag assembly for plugging a blast hole, a blast cover layer covering the outer surface of the plugging bag assembly, and a positioning assembly for fixing a plurality of adjacent blast cover layers on the ground surface, the positioning assembly comprises a flexible protective layer covering the outer side of the cannon cover layer and a plurality of flexible pressing and covering bags, the bottoms of the flexible pressing and covering bags are provided with inserting rods inserted into the ground surface soil layer, and the pressing and covering sandbags can enable the nylon net to be tightly attached to the ground, so that the phenomenon that the nylon net is loosened due to wrinkles is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of construction, in particular, to a blasting hole protection device for stone cutting near high-voltage lines. BACKGROUND

[0002] When excavating a stone cutting near high-voltage lines, if a conventional blasting method is used, the large blasting vibration will affect the stability of the high-voltage line tower, and the blasting fly rock will also threaten the high-voltage line. Therefore, in the past construction process, mechanical excavation is often used for construction, which not only has high construction cost but also slow construction progress, greatly affecting the overall progress control and cost control of the highway project.

[0003] Therefore, after research, analysis, and on-site design and optimization, a blasting excavation method for stone cutting near high-voltage lines is finally designed.

[0004] In the above method, the initiation network design is the core step, and the protection of the blast hole after the blast hole design is also the key to the construction. The existing protection device uses sandbags for negative pressure at the hole, and uses tire blast covers for covering, and nylon nets are used for covering the outside of the tire blast covers, and the four corners of the nylon nets are pressed and covered with sandbags to control the blasting fly rock.

[0005] However, the above-mentioned protection device still has defects. The pressing and covering of the nylon net is carried out by using multiple sandbags. Since the volume of the pressing and covering sandbag is much smaller than that of the hole sealing sandbag, and it is only placed on the ground by its own gravity, however, the construction environment is harsh, and the pressing and covering sandbag is prone to displacement. In addition, sand and stone particles are easy to enter the gap between the pressing and covering sandbag and the nylon net, causing the nylon net to wrinkle, i.e. loose phenomenon, thereby failing to ensure that the protection of the blast hole is in place. Therefore, the existing protection device needs to be improved by those skilled in the art to overcome the above-mentioned defects. CONTENT OF THE UTILITY MODEL

[0006] The main purpose of the present application is to provide a blasting hole protection device for stone cutting near high-voltage lines, which can make the pressing and covering sandbag tightly adhere to the ground, so that it will not wrinkle and cause loosening phenomenon.

[0007] In order to achieve the above-mentioned purpose, in the first aspect, the present application provides a blasting hole protection device for stone cutting near high-voltage lines, which comprises a sealing bag assembly for sealing the blast hole, a blast cover layer covering the outer surface of the sealing bag assembly, and a positioning assembly for fixing the adjacent multiple blast cover layers to the ground. The positioning assembly comprises a flexible protection layer covering the outside of the blast cover layer, and a plurality of flexible pressing and covering bags, the bottom of the flexible pressing and covering bag has an insertion rod inserted into the soil layer of the ground.

[0008] Optionally, the flexible pressure bags are evenly distributed on a circle with the blast hole as the center.

[0009] Optionally, the plugging bag assembly comprises a sand bag and soil or sand gravel arranged in the sand bag.

[0010] Optionally, the blast hole layer is a tire blast hole.

[0011] Optionally, the protective layer is nylon net.

[0012] Optionally, the flexible pressure bag comprises a pressure bag body, a rubber spacer fixedly arranged at the bottom of the pressure bag body, and an upper end of the insertion rod is fixedly connected with the rubber spacer.

[0013] Optionally, the length direction of the insertion rod is 30° with the axis of the blast hole.

[0014] Optionally, the insertion rod is a metal insertion rod.

[0015] Optionally, the upper end of the insertion rod has a connecting portion, the connecting portion has a cross-sectional dimension greater than that of the insertion rod, and the connecting portion is fixed between the rubber spacer and the pressure bag body.

[0016] Optionally, the rubber spacer is fixedly connected with the pressure bag body.

[0017] Compared with the prior art, the device has the advantages that: first, the blast hole is plugged by the plugging bag assembly, then a blast hole layer is covered, then the blast holes are covered by the overall protective layer, and finally the flexible pressure bag is positioned around each blast hole, the insertion rod is inserted into the soil during positioning, so that the flexible pressure bag will not be offset, the overall flatness of the protective layer is ensured, the loosening phenomenon is avoided, the rubber spacer at the bottom not only increases the adhesion area with the ground, but also concentrates the gravity of the pressure sand bag on the surface, and the stability of the overall structure is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings constituting a part of the present application are used to provide a further understanding of the present application, so that other features, objects and advantages of the present application become more apparent. The illustrative embodiment drawings of the present application and the description thereof are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0019] Fig. 1 is a schematic view of the present application;

[0020] Fig. 2 is a schematic view of the flexible pressure bag;

[0021] Fig. 3is a layout schematic diagram.

[0022] 1, plugging bag assembly, 2, gun layer, 3, protective layer, 4, pressure covering bag body, 5, rubber spacer; 6, inserting rod. DETAILED DESCRIPTION

[0023] In order to make the person skilled in the art better understand the scheme of the present application, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of protection of the present application.

[0024] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0025] In the present application, the terms "up", "down", "left", "right", "front", "back", "top", "bottom", "in", "out", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0026] Also, in addition to indicating the orientation or positional relationship, the above-mentioned part of the terms can also be used to indicate other meanings, for example, the term "up" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For the person skilled in the art, the specific meaning of these terms in the present application can be understood according to the specific circumstances.

[0027] In addition, the meaning of the term "a plurality of" should be two and more than two.

[0028] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0029] The protection device is mainly applied to a blasting excavation method of a stone trench near a high-voltage line, and the method comprises the following steps:

[0030] S1, construction preparation

[0031] Before construction, a construction road is built to the top of the slope by mechanical excavation, and then the attachments on the top of the slope are cleaned by an excavator, and at the same time, the loose soil and fully weathered rock on the top of the slope are all removed to expose the bedrock, so as to facilitate the drilling of blast holes. At the same time, the ground elevation after cleaning is fully re-measured to facilitate accurate calculation of the depth of each blast hole;

[0032] S2, selection of blasting parameters

[0033] Deep-hole shock-attenuating and weak blasting technology is adopted for blasting near the high-voltage line, the blast hole diameter is selected to be 9-12 cm, the blast hole depth is not greater than 8 m, so as to control the single initiation explosive charge, and the explosive unit consumption is not greater than 0.35 kg / m3. The hole spacing, row spacing, etc. are determined according to the actual rock mass to be blasted and the structure;

[0034] S3, charging and packing structure

[0035] The uncoupled charging structure is adopted for blasting near the high-voltage line, and the gunite is used to pack between the cartridges, and at the same time, a length of not less than 2 m is reserved at the hole mouth, and the gunite is used for packing;

[0036] S4, initiation network design

[0037] When designing the initiation network, the blasting direction is towards the side away from the high-voltage line, the single-hole initiation is segmented according to the blast hole depth, at least two segments, the delay time between single segments is not less than 5 ms, and the delay time between holes is also used for hole-by-hole delay initiation, and the delay time between holes is not less than 10 ms, so as to reduce the single initiation explosive charge and control the blasting vibration;

[0038] S5, blast hole protection

[0039] That is, the device is aimed at the process step corresponding to step S5, and the structure is as follows:

[0040] As shown in Figs. 1-3 A blast hole protection device for blasting of a stone trench near a high-voltage line, comprising a plugging bag assembly 1 for plugging the blast hole, a blast covering layer 2 covering the outer surface of the plugging bag assembly 1, a positioning assembly for fixing a plurality of adjacent blast covering layers 2 to the ground surface, the positioning assembly comprising a flexible protective layer 3 covering the outer side of the blast covering layer 2, and a plurality of flexible pressure covering bags, the bottom of the flexible pressure covering bag having a plug rod 6 inserted into the ground surface soil layer.

[0041] In order to make the force on the sealing bag assembly 1 in the blast hole uniform and improve stability, the flexible pressure covering bags are uniformly distributed on the circumference with the blast hole as the center.

[0042] Specifically, the sealing bag assembly 1 comprises sandbags, and soil or sand in the sandbags.

[0043] Preferably, the tire is used as the blast hole layer 2, and nylon net is used as the protective layer 3.

[0044] In order to increase the contact area with the ground and ensure the stability of the pressure covering bag body 4, the flexible pressure covering bag comprises a pressure covering bag body 4, a rubber spacer 5 fixedly arranged at the bottom of the pressure covering bag body 4, and a metal insertion rod 6 fixedly connected with the rubber spacer 5 at the upper end thereof. The upper end of the insertion rod 6 has a connecting portion with a cross-sectional dimension larger than that of the insertion rod 6, which is fixed between the rubber spacer 5 and the pressure covering bag body 4, and the rubber spacer 5 and the pressure covering bag body 4 are adhesively fixed.

[0045] Therefore, compared with directly fixing the insertion rod 6 at the bottom of the pressure covering bag body 4, the rubber spacer 5 is used to increase the close contact with the ground when placed on the ground, and the gravity of the entire pressure covering bag is concentrated on the rubber spacer 5, and then fixed by the insertion rod 6, so that the overall stability is stronger, thereby improving the protection effect of the blast hole.

[0046] Preferably, the length direction of the insertion rod is 30° to the axis of the blast hole, thereby increasing the anchoring force and improving the stability.

[0047] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A device for protecting blasting holes in a rock cut adjacent to a high voltage line, characterized in that The application relates to a sealing bag assembly for sealing a blast hole, a blast layer covering the outer surface of the sealing bag assembly, a positioning assembly for fixing adjacent blast layers to the ground surface, the positioning assembly comprising a flexible protective layer covering the outer side of the blast layer and a plurality of flexible pressing bags, the bottom of the flexible pressing bag being provided with a plug rod inserted into the ground surface.

2. A device for protecting a blasting hole from a high-voltage line as claimed in claim 1, characterized in that: The plurality of flexible pressing bags are uniformly distributed on a circumference with the blast hole as the center.

3. A device for protecting a blasting hole from a high-voltage line as claimed in claim 1, characterized in that: The sealing bag assembly comprises sand bags and soil or sand gravel arranged in the sand bags.

4. A device for protecting a blasting hole from a high-voltage line as claimed in claim 1, characterized in that: The blast layer is a tire blast layer.

5. A device for protecting a blasting hole from a high-voltage line as claimed in claim 1, characterized in that: The protective layer is a nylon net.

6. A device for protecting a blasting hole from a high-voltage line according to claim 1, characterized in that: The flexible pressing bag comprises a pressing bag body and a rubber spacer fixedly arranged at the bottom of the pressing bag body, and the upper end of the plug rod is fixedly connected with the rubber spacer.

7. A device for protecting a blasting hole from a high voltage line as claimed in claim 6, wherein: The length direction of the plug rod is 30 DEG with respect to the axis of the blast hole.

8. A device for protecting a blasting hole from a high voltage line as claimed in claim 6, wherein: The plug rod is a metal plug rod.

9. A device for protecting a blast hole from a high voltage line as defined in claim 6, wherein: The upper end of the plug rod is provided with a connecting portion, the cross-sectional dimension of the connecting portion is larger than that of the plug rod, and the connecting portion is fixed between the rubber spacer and the pressing bag body.

10. A device for protecting a blasting hole from a high voltage line as claimed in claim 6, wherein: The rubber spacer and the pressing bag body are fixedly connected.

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