CN217980057U

CN217980057U - Close on side slope presplitting blasting bearing structure

Info

Publication number: CN217980057U
Application number: CN202221476466.5U
Authority: CN
Inventors: 钱旭林; 韩金潮; 叶勤富; 刘佶林; 马开川; 李德坤; 舒天配; 周其江; 张进涛
Original assignee: Yunnan Hualian Zinc and Indium Stock Co Ltd
Current assignee: Yunnan Hualian Zinc and Indium Stock Co Ltd
Priority date: 2022-06-14
Filing date: 2022-06-14
Publication date: 2022-12-06
Anticipated expiration: 2032-06-14

Abstract

The utility model relates to a close on side slope presplitting blasting bearing structure belongs to side slope blasting technical field. The blasting device mainly comprises a pre-splitting hole along a blasting boundary, a buffering hole and a main blasting hole which are respectively arranged on a blasting rock body in front of the pre-splitting hole, a PVC pipe, a supporting rod and a nylon rope, wherein the PVC pipe is inserted into the pre-splitting hole, the supporting rod is arranged at the top end of the PVC pipe, and the nylon rope is wound on the supporting rod; after the hole is punched in the pre-splitting hole, the pre-splitting hole is supported by the PVC pipe, the probability that the pre-splitting hole collapses into a waste hole is reduced, and therefore the pre-splitting blasting quality is improved.

Description

Close on side slope presplitting blasting bearing structure

Technical Field

The utility model belongs to the technical field of the slope blasting, concretely relates to close on side slope presplitting blasting bearing structure.

Background

In order to ensure that the boundary of blasting excavation conforms to the design contour line as much as possible, the phenomena of overbreak or underexcavation do not occur, simultaneously, rock masses on the excavation boundary can be kept as complete as possible without damage, the strength and the stability of the rock masses are kept, and the damage range and the damage degree of blasting earthquake are reduced, therefore, in the open-air medium-length hole blasting of the construction permanent side slope, a presplitting blasting method is adopted; the traditional near slope presplitting blasting process generally adopts bamboo chips as a supporting material to bind a roll-shaped explosive and an explosion wire on the bamboo chips and put the bamboo chips into presplitting holes to form an uncoupled explosive charging structure, and finally, the presplitting holes filled with the explosive are connected into an initiation network for blasting, so that one presplitting blasting construction is completed; the bamboo chips are adopted as supporting materials, and because the bamboo chips have certain rigidity, the bottom ends of the bamboo chips are easy to prop against the wall of the pre-cracked hole when the bamboo chips are placed into the pre-cracked hole after explosives and detonating cords are bound, so that the bamboo chips are difficult to place, long in time consumption and high in working labor intensity; the bamboo chips are made of supporting materials, so that the bamboo chips are weak and easy to break, and construction quality is affected; the pre-cracked hole is easy to collapse before charging, so that the pre-cracked hole becomes a waste hole and can not be charged, thereby affecting the pre-cracked blasting quality, affecting the working progress and being not beneficial to the improvement of the working efficiency.

Disclosure of Invention

In order to overcome the defects that bamboo chips are adopted as supporting materials in the background technology, the bottom ends of the bamboo chips are easy to prop against the wall of a pre-cracked hole when the bamboo chips are placed into the pre-cracked hole after explosives and detonating cords are bound because the bamboo chips have certain rigidity, the placing is difficult, the time consumption is long, and the working labor intensity is high; the bamboo chips are made of supporting materials, so that the bamboo chips are weak and easy to break, and construction quality is affected; the pre-splitting hole is easy to collapse before charging, and the pre-splitting hole is caused to become a waste hole and cannot be charged, so that the pre-splitting blasting quality is influenced, the working progress is influenced, and the problem of improvement of the working efficiency is not facilitated.

In order to achieve the above purpose, the utility model is realized by the following technical scheme: the utility model provides a close on side slope presplitting blasting bearing structure has seted up buffer hole and main blast hole on mainly including the blasting rock mass in presplitting hole, presplitting hole the place ahead along blasting border, still includes PVC pipe, bracing piece, nylon rope, the PVC pipe insert and establish in the presplitting hole, the bracing piece is installed on PVC pipe top, the nylon rope winding is on the bracing piece.

The support rod is a bolt, the top end of the PVC pipe is provided with a jack, and the support rod is inserted into the jack and fixed through a nut.

The bottom end of the PVC pipe is sleeved with a guide conical sleeve which is convenient to insert into the pre-splitting hole.

The utility model has the advantages that:

the utility model discloses adopt the pvc pipe to strut the presplitting hole after accomplishing the presplitting hole and punching, the probability that the presplitting hole collapses and becomes the waste hole has been reduced, thereby presplitting blasting quality has been improved, adopt the nylon rope to bind roll-shaped explosive and detonating cord and hang in pvc pipe top, difficult fracture, be favorable to improving construction quality, roll-shaped explosive and detonating cord that flexible nylon rope binded are transferred, the pvc inside pipe wall is smooth, transfer fastly, construction speed has been improved, be favorable to improving labor production efficiency, reduce blasting frock physical strength labor intensity.

Drawings

Fig. 1 is the structural schematic diagram of the pre-crack hole, the buffer hole and the main blast hole of the present invention.

Fig. 2 is a schematic view of the working state structure of the present invention.

Fig. 3 is a partially enlarged schematic view of a portion a of fig. 2.

Fig. 4 is a perspective view of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the following will make a detailed description of a preferred embodiment of the present invention with reference to the accompanying drawings to facilitate understanding of the skilled person.

The utility model discloses a near side slope pre-splitting blasting support structure, which mainly comprises a pre-splitting hole 1 along the blasting boundary, a buffering hole 2 and a main blasting hole 3 which are respectively arranged on the blasting rock mass in front of the pre-splitting hole 1, a PVC pipe 11, a support rod 12 and a nylon rope 13; the PVC pipe 11 is inserted in the pre-splitting hole 1, the supporting rod 12 is installed at the top end of the PVC pipe 11, the nylon rope 13 is wound on the supporting rod 12, the PVC pipe 11 is used for supporting the pre-splitting hole 1 after the pre-splitting hole is punched, and the probability that the pre-splitting hole 1 collapses into a waste hole is reduced, so that the pre-splitting blasting quality is improved, the nylon rope 13 is used for binding the coiled explosive 5 and the detonating cord 4 and hanging the coiled explosive and the detonating cord 4 on the top end of the PVC pipe 11, the coiled explosive and the detonating cord bound by the flexible nylon rope are not easy to break, the construction quality is improved, the coiled explosive and the detonating cord bound by the flexible nylon rope are lowered, the inner wall of the PVC pipe 11 is smooth, the lowering speed is high, the construction speed is improved, the labor production efficiency is improved, and the labor intensity of explosive physical strength and labor intensity of blasting tools are reduced.

The bracing piece 12 be the bolt, 11 tops of PVC pipe are equipped with the jack, the bracing piece 12 is inserted and is established in the jack, and is fixed through the nut, as shown in fig. 4, nylon rope 13 twines and is convenient for manage, transport and deposit on bracing piece 12, uses when needs to make and stimulates nylon rope 13 end, bracing piece 12 rotates, can easily pull out nylon rope 13 and expand for subsequent use.

PVC pipe 11 bottom cover be equipped with the direction toper cover 14 that conveniently inserts in the presplitting hole 1, can easily insert PVC pipe 11 and establish in presplitting hole 1, guarantee that PVC pipe 11 inserts and establishes target in place, guarantee the blasting effect.

The working process is as follows:

after the pre-splitting hole 1 is punched, the PVC pipe 11 is inserted into the pre-splitting hole 1, the PVC pipe 11 can be easily inserted into the pre-splitting hole 1 through the guide conical sleeve 14 at the front end of the pre-splitting hole 1, the PVC pipe 11 is ensured to be inserted in place, the blasting effect is ensured, the pre-splitting hole 1 is supported through the PVC pipe 11, the probability that the pre-splitting hole 1 collapses into a waste hole is reduced, the pre-splitting blasting quality is improved, the nylon rope 13 is used for binding the coiled explosive 5 and the detonating cord 4, the coiled explosive and the detonating cord are hung at the top end of the PVC pipe 11 after being placed, the coiled explosive and the detonating cord are not easy to break, the construction quality is improved, the coiled explosive and the detonating cord bound by the flexible nylon rope are placed, the inner wall of the PVC pipe 11 is smooth, the placing speed is high, the construction speed is improved, the labor production efficiency is improved, and the labor intensity of explosive body force and labor intensity of a blasting tool is reduced.

Finally, it is noted that the above-mentioned preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above-mentioned preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.

Claims

1. A pre-splitting blasting support structure close to a side slope comprises pre-splitting holes (1) along a blasting boundary, and a buffer hole (2) and a main blasting hole (3) are respectively formed in a blasting rock body in front of the pre-splitting holes (1); the method is characterized in that: still include PVC pipe (11), bracing piece (12), nylon rope (13), PVC pipe (11) insert and establish in pre-splitting hole (1), install on PVC pipe (11) top pole bracing piece (12), nylon rope (13) twine on bracing piece (12).

2. A near slope presplitting blasting support structure as defined in claim 1, wherein: the support rod (12) is a bolt, the top end of the PVC pipe (11) is provided with a jack, and the support rod (12) is inserted into the jack and fixed through a nut.

3. A near slope presplitting blasting support structure as defined in claim 1 or 2, wherein: the bottom end of the PVC pipe (11) is sleeved with a guide conical sleeve (14) which is conveniently inserted into the pre-splitting hole (1).