JPH07120200A - Blasting method - Google Patents

Abstract

PURPOSE:To provide a blasting method through which splashing and bombing phenomenon are prevented from occurring when blasting is executed. CONSTITUTION:In a blasting method for an object to be ruptured wherein a charge hole 2 drilled in an object to be ruptured is charged with explosives 3 and a hole port is sealed with a damping material 5 to effect blasting, a heat resisting and shock resisting mat 6 in the shape of a cap with a brim is placed on the hole port. The mat 6 is covered with a sheet 8 formed of high strength fibers to prevent splashing of flying stones and further the upper surface of the sheet 8 is covered with a sheet covering body 9 having a means by which a plurality of weight bodies 14 are securely arranged in a dispersed state, and a body to be ruptured is blasted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a method of preventing scattered objects such as flying stones and gun phenomena which are inevitably generated in the blasting work of brittle destructible objects such as concrete or rocks by explosives. The present invention relates to a blasting method capable of protecting explosives and securing more safety by systematizing them together.

[0002]

2. Description of the Related Art Up to now, blowing up of protective materials due to flying stones and gun phenomena that occur inevitably when carrying out blasting work, and scattered materials caused by blowing away have been regarded as a problem as a pollution source of blasting work, but it is effective. Currently, there is no countermeasure or method. As a current method of protecting explosives, blasting sheets using fibers such as old tatami mat, nylon and tetron, blasting mats using old tires and synthetic rubber plates, etc. are used.

[0003]

However, these conventional protection methods are aimed at the prevention effect of only one of the prevention of scattered materials such as flying stones and the gun phenomenon.
Each of them has problems such as insufficient strength, workability due to excessive weight, difficulty in obtaining materials, etc., and a product capable of obtaining a sufficient effect has not been developed. Furthermore, there is nothing about a material that can simultaneously prevent both flying materials such as flying stones and the gun phenomenon and obtain a sufficient effect.

The present invention has been made in view of the above problems. The purpose is to improve workability by reducing the weight of each work such as loading and unloading of protective material when performing blasting work using explosives, and at the same time, each phenomenon that occurs in blasting work. By selecting the appropriate protective material that corresponds to
It is an object of the present invention to provide a blasting method capable of preventing the scattering of flying stones or the like, which is inevitably generated during the blasting work, and the blowing up and blowing off of the protective material due to the gun phenomenon, and further ensuring safety.

[0005]

Means for Solving the Problems As a result of intensive studies, the present inventor has loaded explosives into a filling port formed in a body to be destroyed as usual, and filling an insert (4) such as sand into the hole. In the blasting method in which the hole mouth is sealed with a damping material (5) such as hydraulic mortar, a cap-shaped mat with a collar is provided on the hole mouth.
The present inventors have found that it is effective to use a combination of three types of protective means, that is, a sheet made of high-strength fiber and a bag-shaped sheet, and have reached the present invention.

That is, the present invention provides a method of blasting a destructible body in which explosives are loaded into a loading hole formed in the destructible body, and the hole mouth is sealed with a damping material to explode. A heat-resistant and shock-resistant mat in the shape of a hat with a collar that prevents the sudden and intense scattering of scattered objects with an extremely narrow scattering range and directionality due to the gun phenomenon is placed on the mat over a wide range of directions such as flying stones. Blast the object to be destroyed by covering it with a sheet made of high-strength fiber that prevents the scattering of undesired scattered objects, and then covering it with a sheet covering equipped with a means for dispersing, arranging and fixing a plurality of weights. The blasting method is characterized by

The present invention will be described in detail below.

The circular cap-shaped heat resistant and impact mat (6) used in the blasting method of the present invention has a structure as shown in FIG. 3, for example, but the material is soft and lightweight. High impact strength is preferable. This is because, depending on the scale of the blasting work, when the number of holes loaded with explosives is large, it is also preferable in terms of workability when placing on the hole mouth of each loading completion hole and not breaking the blasting leg line. . further,
Its power is 1/50 to 1/10 of explosives such as dynamite
In a concrete crusher of about 0, the inner surface of the circular cap-shaped mat with a collar may be heat-resistant and flame-retardant due to the high heat of the explosive combustion of the concrete crusher and the flame that blows out after the damping material when the gun phenomenon occurs. A hat-shaped shape is preferable in terms of wrapping these scattered matters.

As a material having the above characteristics, a rubber containing fibers such as canvas is suitable, and a thickness of 5 cm to 2 is particularly preferable.
It is preferably in the range of 0 cm, the diameter is 25 cm to 50 cm, and the weight thereof is in the range of 0.5 kg to 3 kg.

A sheet (8) for preventing scattering of flying stones and the like by a blasting work, a heat-resistant and impact mat (6) in the form of a circular cap with a collar, and the sheet (8) for preventing the sheet from being blown up and blown off. The sheet cover (9) of (1) is preferably capable of covering the entire scale of the blasting work with a single sheet, but the scale of the blasting work is large and small, and in terms of workability, its size and weight are large. Since there is a limit, a suitable square or rectangle is preferable, and when the blasting work scale is large, it is preferable that the sheet (8) or its covering (9) can be easily connected to cover the whole. Such a sheet covering can be used in the form of a sheet, a bag, a sheet, a net or a mat.

Regarding the sheet (8) for preventing scattering of flying stones due to blasting work, it is preferable that the sheet (8) is connected in a state of overlapping so as to prevent flying blast of blasting and flying materials such as flying stones from flying out. Further, it is preferable that the size and the shape thereof can be easily processed, and that they have strength and a certain weight so as to prevent the impact of a blast of a blast or a flying stone or the like from being mitigated. In particular, since the sheet (8) inevitably encloses concrete, rocks, etc. after blasting, it is preferable that the sheet (8) has a sharp corner of the object to be destroyed and a large tensile strength that is hard to be broken by a large heavy machine for post-treatment. The more flexible and excellent the flexibility, the more preferable.

[0012] or more as a material having a characteristic is preferably high strength fibers of nylon or polyester or the like, its size is preferably quadrilateral or rectangular range of 9m ² 12m ^2, weight range of 5kg~25kg Are preferred. Further, it is preferable that the sheet covering (9) is capable of alleviating a strong impact caused by a blast, flying stones or other scattered objects, or a gun phenomenon. In particular, it is more preferable that the sheet has a bag shape, and air is injected into the sheet to be in an air bag state. The amount of air injected into the sheet covering (9) is preferably 0% to 90% of the inner volume of the bag in order to protect the sheet from a strong impact such as a blast, flying stones, or a gun phenomenon.

The sheet cover (9) is provided with a circular cap-shaped heat-resistant / shock mat (6) of the present invention and a sheet (8) for preventing scattering of flying stones. In order to ensure prevention, a means for dispersing, arranging and fixing the weight body (14), for example, a pocket (10) is provided at an appropriate position of the sheet covering body. Then, preferably, a stop member for preventing the weight body inserted into the pocket from falling off is provided on the sheet covering body. This sheet covering (9)
The weight body (14) having a high specific gravity can be made of metal such as iron or lead, nylon, synthetic resin for engineering, or rubber, but the material is soft and as thin as possible. Smaller ones are preferable, and especially to have a function of mitigating the impact of falling in order to prevent secondary accidents to workers due to loading / unloading to / from the work site, attachment / detachment work to / from the sheet cover (9), and falling. , The softer the better,
Further, it is more preferable that it is less likely to be deformed.

As the material having the above characteristics, rubber is preferable, and the diameter is preferably 1 cm to 10 cm and the length thereof is preferably 0.5 m to 2 m, and the weight is 5 kg to 20 cm.
The range of kg is preferred. Further, as a shape, a round bar having both ends rounded is preferable in the work of putting in and out of a pocket-shaped pouch.

[0015]

EXAMPLES Examples will be described below with reference to the drawings.

FIG. 1 shows an overall outline of the blasting method of the present invention in the rock blasting work, and FIG. 2 is a diagram showing the details of its cross section.

FIG. 3 is a circular cap-shaped heat-resistant / shock-resistant, which is used in the blasting method of the present invention and has a very narrow scattering range due to the iron crushing phenomenon and has a direction to prevent sudden and intense scattering of scattered materials. It is a figure which shows the plane and cross section which show the Example of the mat (6) for use, and details of the constituent materials. This mat (6) is made of rubber (6a) for impact resistance, fibers (6b) such as canvas and heat resistance. It is composed of three layers of rubber (6c).

FIG. 4 shows a flat surface and a sheet (8) showing an embodiment of a sheet (8) for preventing scattering of non-directional scattered matter such as flying stones in advance on the sheet (8). Connect the connecting holes (8a, 8b) to a simple connecting tool (8
It is a figure which shows the state which overlapped and was connected in c).

FIG. 5 shows a blow-up and blow-off caused by a blast and a gun phenomenon at the time of blasting the heat-resistant and shock-resistant mat (6) with a collar and the seat (8) for preventing scattering of flying stones. It is a figure which shows the plane and cross section of the bag-shaped sheet (9) for carrying out, (13) is a conveyance and connection handle of a sheet coating | cover (9), (12) is a sheet coating | cover (9) finally. Shows the air inlet / outlet for use as an airbag. Further, FIG. 6 shows the shape of the weight body (14) which is housed in the pocket-shaped pouch (10) provided in advance in the sheet covering body (9) to increase the weight of the entire sheet covering body (9). A pocket-shaped pouch containing the weight and the weight (14) (1
0) One-touch type detachable stopper member (11a, for sealing so as not to spill or pop out from the mouth due to impact when blasting)
It is a figure which shows the detail of 11b).

[0020]

The method for protecting flying objects such as flying stones and the gun phenomenon that are inevitably generated when carrying out the blasting work by the blasting method of the present invention is a hat-shaped mat with a collar, a sheet made of high-strength fiber, It consists of a combination of three protective materials with a sheet covering. In other words, by using a cap-shaped mat with a brim made of soft material with excellent heat resistance and impact of rubber containing fibers such as canvas, the impact of the hardened mortar due to the gun phenomenon and the high heat and flame due to the combustion of explosives are wrapped and prevented. Then
By protecting the sheet made of high-strength fiber that prevents flying stones and other scattered materials that are inevitably generated in the blasting work, the scattering prevention effect of the sheet is enhanced, and a sheet covering body containing a weight body is preferable. To prevent the scattering of explosives during the blasting work by explosives by absorbing and absorbing the entire impact in an air bag state and holding it down, to ensure more safety and improve work efficiency You can

[0021]

As described above, according to the present invention, it is possible to prevent scattering of flying stones and the like that occur during blasting, and at the same time to prevent blowing up of protective materials due to the gun phenomenon, thus further improving safety. be able to. Moreover, the mats and sheets used in the present invention depend on the object to be blasted,
Moreover, since the size and weight suitable for the preparatory work can be easily selected and adjusted, the work efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an implementation status of a blasting method of the present invention.

FIG. 2 is a sectional view of the same.

FIG. 3 is a plan view (a) and a cross section (b) of a circular cap-shaped circular cap-shaped heat-resistant and impact mat used in the blasting method of the present invention, and a detailed material configuration diagram (c).

FIG. 4 is a detailed view (b) of the scattering prevention sheet made of high-strength fibers for use in the blasting method of the present invention and a state in which the sheets are superposed and connected by a simple connecting tool such as an eggplant. ).

FIG. 5 is a circular cap-shaped heat-resistant / impact mat in the form of a collar and a flying stone that absorbs and relaxes the impact of the entire protective material used in the blasting method of the present invention, and presses it down to prevent it from exploding or blasting during blasting work. (A) and a cross-sectional view (b) of a sheet covering used in an air bag state in order to prevent the scattering prevention sheet from being blown up to a high place and blown away to a distant place.

FIG. 6 is a plan view of a rod-shaped weight body for adjusting the weight of the bag-shaped sheet.

FIG. 7 is an explanatory view of a simple stopper member for a pocket, which is provided in the sheet covering body and accommodates the weight body.

[Explanation of symbols]

 1 Bedrock 2 Loading hole for explosives 3 Explosives 4 Inclusions such as sand 5 Damping material such as hydraulic mortar 6 Heat-resistant / impact mat in the shape of a circular cap with a collar 7 Holes for connecting 8 Scattering materials such as flying stones Prevention sheet 9 Sheet cover provided with means for fixing weight 10 Pockets 11a, b for accommodating weight 12 Attachment / detachment stop member 12 Air inlet / outlet of bag-like sheet cover 13 Handle for transporting and connecting 14 Weighted body

Claims (3)

[Claims] 1. A method of blasting an object to be destroyed, comprising: loading explosives into a loading hole drilled in the object to be destroyed; sealing the hole mouth with a damping material to explode; and A hat-shaped heat-resistant and shock-resistant mat with a collar that prevents the rapid and intense scattering of scattered objects with a narrow scattering range and directionality, and has a wide range of scattering objects such as flying stones that do not have directionality on the mat. Characterized in that a sheet made of high-strength fiber for preventing the scattering of the sheet is covered, and further, a plurality of weights are dispersed, arranged, and fixed on the upper surface of the sheet with a sheet covering to explode the object to be destroyed. And the blasting method. 2. The blasting method according to claim 1, wherein the sheet covering is a bag and is an airbag made of high-strength fibers infused with air. 3. The blasting method according to claim 2, wherein the airbag is provided with a carrying and / or connecting means.