KR102525652B1 - Protector for multi-stage charge protection for deck charge method for rock blasting and rock blasting method using the same - Google Patents

Abstract

The present invention relates to a multi-stage charge protector for a deck charge construction method for rock blasting and, more specifically, to a multi-stage charge protector for a deck charge construction method for rock blasting, which enables a tamping material supplied together with a charge when the charge installed for rock blasting explodes, to pressurize an elastic support means to be strongly in close contact with the inner wall of a blast hole, thereby increasing friction with the blast hole and preventing the explosion or dead pressure of a secondary charge, and can respond to the diameter of the blast hole through a contact means that can move up and down and approaches or is distanced from the inner wall of the blast hole when moving up and down. To this end, the multi-stage charge protector comprises: a body having one closed longitudinal end and the other opened longitudinal end; an expansion portion extending from the other opened longitudinal end of the body and expanded outward; an inlet portion extending from an end of the expansion portion in a longitudinal direction and having explosives inserted thereinto; and an elastic support means detachably coupled to the inlet portion to meet the inner wall of a blast hole by the tamping material for a charge inserted into the pre-formed blast hole.

Description

Protector for multi-stage charge protection for deck charge method for rock blasting and rock blasting method using the same}

The present invention relates to a multi-stage charge protection protector for a deck charging method for rock blasting and a rock blasting method using the same, and more particularly, to an elastic support in which a filler inserted along with the charge is elastically supported when the charge installed for rock blasting explodes. The means is pressurized so that it strongly adheres to the inner wall of the blasting hole to increase the frictional force with the blasting hole, prevent the width or pressure of the secondary charge, and is movable up and down and is configured to approach or separate from the inner wall of the blasting hole during vertical movement It relates to a multi-stage charge protection protector for deck charging method for rock blasting and a rock blasting method using the same, which can correspond to the diameter of the blasting hole through

As is well known, blasting is to make cracks on solid bedrock by shock waves, expand the cracks to a large extent by gas expansion, and split and drop them into rock masses (or blocks). It means to protect a structure or facility.

Such blasting includes tunnels, excavation of underground tunnels, subway construction, road design, road expansion, concrete aggregate or building stone, extraction of mineral resources, underwater blasting, canal construction, seismic prospecting and prediction of earthquake occurrence, underground storage bases and spaces. It is used for use, etc., and can be classified into various types according to the type of blasting site and surrounding conditions.

In the process of blasting rocks, it is common to first drill a hole in the rock and charge explosives into it before blasting it. A hole with a depth of several meters is used, but depending on the scale of blasting, a blast hole with a diameter of 30 cm and a depth of 20 m is sometimes used.

The blasting method applied to excavators that cut rock mass by blasting is applied to reduce overbreaking and block transmission of vibration. These methods include smooth blasting, line drilling, Pre Splitting) and Cushion Blasting. Among them, the pre-splitting blasting method is a method of detonating in advance of the main blasting hole, and the rest is a method of blasting after detonating the main blasting hole.

In addition, the conventional blasting method is classified into a parallel blasting method and an angle cut method according to the initial free surface formation method, and each representative method is a burn cut method and a V-cut method ( V-Cut), and other various methods are known.

The V-cut method, which is a representative method among the inclined blasting methods, drills deep holes at a constant angle (about 60°) in a symmetrical form on the left and right based on the center line of the face, so the number of holes per unit area is small, but the drilling speed per blasting is small. It is limited according to the cross-sectional width of the tunnel, and there are problems in that the simultaneous detonation number of the deep hole increases and the blasting vibration and noise are greatly generated due to the excessive quarry volume, and the shelter formation and the scattering distance of the blast stone are long.

In the burn cut method, which is a representative method of the parallel blasting method, the number of holes drilled per unit area is increased compared to the V-cut method by parallel drilling the charge holes at regular intervals centered on the weapon holes on the surface of the face, but the number of holes drilled per unit area is increased. Since it is not limited by the factory, it has the advantage of increasing the construction efficiency by lengthening the excavation field per blasting, maximally dispersing vibration by using the time difference of the detonator, and making the crushing particle size uniform.

However, in the case of the parallel blasting method, the crushed rocks are concentrated in the non-armored hole during deep-hole blasting centered on the armless hole, and at this time, if the armless hole does not fulfill the smooth free surface effect, the crushed stone cannot be extracted to the outside and is filled all at once. There is a problem in that vibration and noise increase due to an increase in the charge per hole of the deep hole and the deep hole expansion when the phenomenon occurs and leads to the failure of the entire blasting or when long hole drilling is performed to lengthen the drilling length per blasting.

As described above, the parallel blasting method has many advantages compared to the inclined blasting method, such as less vibration and noise generation, uniform crushed stone, and no restrictions on excavation length per blasting. When long holes are drilled to lengthen the cymbalgo, there is a problem in that noise and vibration increase due to the increase in the charge per hole of the cymbalgo.

As a technology proposed to solve the above problems, split blasting by the deck charge method has been proposed in addition to the existing parallel blasting method and the inclined blasting method.

The deck charging method requires double charging with an outer first-stage charge and an inner second-stage charge centered on the entire color inside the same charge hole, and at least 30 cm or more is required to prevent explosion between the first and second charge charges. Due to the need to maintain the warp field, it is not possible to sufficiently secure the required amount of charge per unit volume, resulting in total blasting failure, or the impact pressure generated by the explosion of the first stage charge is transmitted to the second stage charge through the warp to make the second stage charge. There was a problem that the entire blasting failed by sand pressure.

Republic of Korea Patent No. 10-0467483 Republic of Korea Patent No. 10-0936630 Republic of Korea Patent No. 10-1972124

The present invention has been proposed to solve the above problems, and induces the color change material to move toward the inner wall of the blasting hole when the primary charge explodes, thereby increasing the frictional force of the color change material itself with the inner wall of the blasting hole. An object of the present invention is to provide a multi-stage charge protection protector for a deck charging method for rock blasting, which can provide sealing force and, in particular, can prevent the explosion or dead pressure of the secondary charge.

In addition, the present invention is a deck charging method for rock blasting that expands the selection range of the blasting process by providing an elastic support means that comes into contact with the inner wall of the blasting hole, and can be selectively used as needed by configuring the elastic support means to be coupled and detachable. An object of the present invention is to provide a multi-stage charge protection protector.

In addition, the present invention is provided with a close contact means contacting the inner wall of the blasting hole, configured to adjust the position of the close contact piece constituting the close contact means to be arranged on the same line as the support piece constituting the elastic support means to prevent the drawn in color An object of the present invention is to provide a multi-stage charge protection protector for the deck charging method for rock blasting that can improve the sealing power used.

In order to achieve the above object, the present invention,

a body with one end in the longitudinal direction closed and the other end in the longitudinal direction opened;

Doedoe extending along the longitudinal direction from the other open end of the body, extending toward the outside;

an inlet portion extending along a longitudinal direction from an end of the expansion portion and into which explosives are introduced;

It is characterized in that it includes; an elastic supporting means which is detachably coupled to the inlet part and comes into contact with the inner wall of the blasting hole by the prefilling material for the charge introduced into the pre-shaped blasting hole.

In addition, the elastic support means includes a coupling ring detachably coupled to the outer circumferential surface of the inlet portion, and a plurality of support pieces radially disposed on the outer circumferential surface of the coupling ring, wherein the support pieces correspond to the inner wall of the blasting hole. It is made in the form of a plate having a curvature, characterized in that one end in the longitudinal direction is coupled to the coupling ring and the other end in the longitudinal direction is disposed inclined toward the outside.

At this time, the support piece is characterized in that a limiting protrusion is formed on one surface disposed toward the inner wall of the blasting hole to limit the upward movement of the support piece.

In addition, the body is further provided with a close contact means for contacting the inner wall of the blast hole by the color inserted into the pre-shaped blast hole, the close contact means is made in the form of a circular ring with a center penetrating vertically, and a part of the rim It is characterized in that it includes a fastening ring cut to form a 'C' shape, and a plurality of contact pieces radially disposed on the outer circumferential surface of the fastening ring.

At this time, a spiral movement path to which the fastening ring is coupled is formed in the body, and the spiral movement path is concave on the outer circumferential surface along the longitudinal direction of the body, and the depth of the concavity deepens from the top to the bottom. to be characterized

The present invention made as described above induces the color change introduced during the explosion of the primary charge to move toward the inner wall of the blasting hole and presses the protector to adhere to the inner wall of the blasting hole to increase the frictional force with the inner wall of the blasting hole. There is an effect of preventing the oil width or firing pressure of the charge.

In addition, the present invention improves the sealing force of the color introduced through the elastic supporting means and the close means, and in particular, the close contact means coupled to the body having a relatively small diameter adjusts the exposed position to the outside to configure the elastic support means By positioning the support piece and the contact piece constituting the contact means on the same line, there is an effect of increasing the sealing force through the drawn in color.

1 is an exemplary view showing a multi-stage charge protection protector for deck charging method for rock blasting according to the present invention.
Figure 2 is an exploded view showing a part of a multi-stage charge protection protector for deck charging method for rock blasting according to the present invention.
Figure 3 is a cross-sectional view showing a cross-section of a multi-stage charge protection protector for deck charging method for rock blasting according to the present invention.
Figure 4 is an exemplary view showing an elastic support member constituting the present invention.
Figure 5 is an exemplary view showing an adhesion means constituting the present invention.
Figure 6 is an exemplary view showing a close contact means moving along the spiral movement path formed in the body constituting the present invention.
7 is an exemplary view showing a state of use of a multi-stage charge protection protector for deck charging method for rock blasting according to the present invention.
8 is an exemplary view showing a rock blasting method using a multi-stage charge protection protector for a deck charging method for rock blasting according to the present invention.

Hereinafter, other objects and features of the present invention in addition to the above objects will be clearly revealed through the description of the embodiments with reference to the accompanying drawings.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, they should not be interpreted in an ideal or excessively formal meaning. don't

Hereinafter, a preferred embodiment of a multi-stage charge protection protector for deck charging method for rock blasting according to the present invention will be described with reference to the accompanying drawings.

First, as shown in FIGS. 1 and 2, the multi-stage charge protection protector 1 for the deck charging method for rock blasting according to the present invention has a closed body 10 at one end in the longitudinal direction and an open end at the other end in the longitudinal direction. And, an expansion part 20 extending along the longitudinal direction from the other open end of the body 10 and extending outward, and extending along the longitudinal direction from the end of the extension part 20 and an explosive is introduced It includes an inlet portion 30 and an elastic supporting means 40 that is detachably coupled to the inlet portion 30 and comes into contact with the inner wall of the blast hole by the prefill material for the charge introduced into the pre-shaped blast hole.

The body 10 is made of a tubular body that has an empty interior and extends in the longitudinal direction, one end of which is closed in the longitudinal direction and the other end in the longitudinal direction is closed.

The body 10 is disposed at the lower end of the blasting hole by inserting a pre-shaped blasting hole for rock blasting, and at this time, the closed end of the body 10 is formed in a hemispherical shape protruding convexly outward.

The closed end of the body 10 is formed in a protruding hemispherical shape, and a weight 11 may be further disposed therein, and the weight 11 is inserted into the bottom surface of the blasting hole by the body 10. In particular, even when water such as groundwater exists inside the blasting hole, the body into which the explosive having a smaller specific gravity than water is introduced can be easily inserted. Such a weight may be made of metal or rock, which is a weight.

In addition, since the closed end of the body 10 is formed in a protruding hemispherical shape, the protruding hemispherical portion is prevented from being caught on the protruding portion from the inner wall of the blasting hole and damaged when inserted into the drilled blasting hole. Here, in another embodiment, the closed end of the body 10 may be formed in a wedge shape protruding outward.

On the other hand, the body 10 extends in a straight line from the closed end as shown in the drawing, and the contact means 50 described below is detachably coupled, but the coupled contact means 50 is coupled to be movable up and down. A spiral movement path 12 is formed. A detailed description of the spiral movement path 12 will be described later.

The expansion part 20 is formed extending along the longitudinal direction from the rim of the open end of the body 10, and extends outward toward the inner wall of the blasting hole, and the expanded form is oblique as shown in the drawing. expands in the direction of

The expansion part 20 is formed between the body 10 and the inlet part 30 to be described later, and the diameter of the inlet part 30 is determined through the expansion part 20 and at the same time the inlet part 30 It supports the load of explosives and warp materials drawn into the .

As described above, the vertical length and the angle of inclination of the expansion part 20 can be changed corresponding to the diameter of the inlet part 30, and are not limited to the ratio shown in the drawings.

The inlet portion 30 extends in the longitudinal direction, has a hollow inside, is opened at both ends in the longitudinal direction, through which explosives are introduced, and extends from the end of the extension portion 20 along the longitudinal direction.

At this time, the inlet portion 30 may be formed in various shapes such as a cylindrical shape or a polygonal shape, and the shape of the coupling ring 41 constituting the elastic supporting means 40 to be described later may be changed corresponding to the shape of the inlet portion 30. do.

In addition, the inlet portion 30 is formed so as to have a relatively large diameter compared to the diameter of the explosive, in which the explosive is introduced into the empty inside.

On the other hand, the inlet portion 30 is made of a straight line connecting both ends in the longitudinal direction, but in another embodiment, it may be made of an inclined shape so as to approach the inner wall of the blasting hole as it moves away from the expansion part 20, , Through this, the convenience of the explosives is improved, and the introduced explosives are prevented from being caught on the inner wall of the inlet portion (30). In addition, when the explosives are pressurized from the top to the bottom using a pole, etc. to move the explosives downward while inserting the sealant together with the explosives, a relatively large amount of sealant is injected to the upper side compared to the lower side of the explosives, so that blasting It is possible to increase the pressure applied to the elastic support member 40, which will be described later, when the color change material is applied.

Furthermore, the inlet portion 30 is formed with a plurality of incision grooves (not shown in the drawing) at regular intervals in other embodiments other than being formed in the form of a body extending in the longitudinal direction, so that the inlet portion 30 is self-elastic. It may be configured to have a restoring force, and the inlet portion 30 is configured to have its own elastic restoring force, so that the coupling ring 41 of the elastic support means 40 described later is coupled or separated through the incision groove in the process of being coupled or separated. Adjacent parts are close to each other so that the coupling ring 41 can move, and after the coupling ring 41 moves, it can be fixed while in close contact with the inner wall of the coupled coupling ring 41 through its own elastic restoring force.

The elastic supporting means 40 is detachably coupled to the outer surface of the inlet portion 30 and comes into contact with the inner wall of the blasting hole by the pre-formed blasting material introduced into the blasting hole, and the outer circumferential surface of the inlet portion 30 It includes a coupling ring 41 detachably coupled to the coupling ring 41, and a plurality of support pieces 42 radially disposed on the outer circumferential surface of the coupling ring 41.

The coupling ring 41 is formed in a circular ring shape and fitted to the inlet portion 30, wherein the inner diameter of the coupling ring 41 corresponds to the outer diameter of the inlet portion 30, and the inlet portion An engaging means 43 for maintaining the coupled state to (30) may be further provided.

The locking means 43 includes a plurality of locking grooves 431 concave at regular intervals on the inner surface of the coupling ring 41 and formed on the outer surface of the inlet portion 30 to be inserted into the locking grooves 431. It consists of a coupling protrusion (432).

As described above, the locking means 43 fixes the coupling ring 41 together with the self-elastic restoring force of the inlet part 30 when a plurality of incision grooves are formed in the inlet part 30 to have its own elastic restoring force, thereby fixing the blasting hole. It is possible to prevent positional displacement from occurring in the process of being put into.

The support piece 42 is formed in the form of a plate extending in the longitudinal direction to come into contact with the inner wall of the blasting hole, and has a curvature corresponding to the inner wall of the blasting hole.

In addition, a plurality of the support pieces 42 are formed on the outer circumferential surface of the coupling ring 41, and one end in the longitudinal direction is coupled to the coupling ring 41, and the other end in the longitudinal direction is inclined toward the outside.

At this time, the support piece 42 is composed of a straight portion 421 that comes into contact with the inner wall of the blasting hole and a slanted portion 422 connecting the straight portion 421 and the coupling ring 41, and the slanted portion 422 In order to limit the upward movement of the support piece 42, a limiting protrusion 423 protruding outward is formed.

The linear part 421 is pressed toward the inner wall side of the blasting hole by the sealing material drawn into the blasting hole when the primary charge, that is, the explosive is first exploded in a state in contact with the inner wall of the blasting hole, and in the pressurized state, the sealing force along with the sealing material is provided so that the explosives waiting for the secondary charge do not cause explosion (chain explosion) or dead pressure.

Here, the dead pressure is a phenomenon in which the explosion reaction does not continue due to the side wall effect caused by the empty space inside the blast hole or the departure of the free space generated by the transmission of the shock wave by the blast of the adjacent ball. It is a phenomenon in which explosives remain as they propagate through cracks in bedrock, water, and air, applying pressure to and compressing explosives.

In the present invention, in order to prevent oil width and sand pressure, the support piece 42 is brought into close contact with the inner wall side of the blasting hole, and the sealing material inserted between the adhered support piece and the explosive presses the support piece when the explosive explodes, so that the shock wave is transmitted to the adjacent other side. By minimizing transmission to the blasting hole, oil width and sand pressure can be prevented, thereby maximizing blasting efficiency and increasing blasting accuracy.

The elastic supporting means 40 formed as described above is introduced between the color change material drawn into the inlet part 30, the support piece 42 constituting the elastic supporting means 40, and the outer wall of the inlet part 30. It is pressed to the inner wall side of the blasting hole by the colored sealant, and in particular, the sealant drawn into the two spaces forms a sealing force in each space, thereby preventing oil width and sand pressure.

On the other hand, a plurality of the support pieces 42 are arranged at equal intervals, and the vertical length of each support piece is different from each other, and the position to be sealed by the introduced seal is configured in multiple stages in the vertical direction, so that the sealing force through the introduced seal can improve

In addition, the straight portion 421 of the support piece 42 may be formed to have a relatively wider width than the slanted portion 422 so as to increase an area in contact with the inner wall of the blasting hole.

In addition, the oblique portion 422 is formed to extend outward from the rim of the coupling ring 41, but is formed integrally with the rim to prevent the drawn in color material from escaping to the outside, and the support piece 42 ) are arranged radially around the coupling ring 41, but each is disposed at a mutually spaced position, and is pressed toward the inner wall of the blasting hole by the drawn-in sealant.

The limiting protrusion 423 is formed at a portion where the straight portion 421 and the oblique portion 422 abut, protrudes toward the inner wall of the blasting hole, and moves upward after the support piece 42 is inserted into the blasting hole. restrict movement.

Here, when the support piece 42 inserted into the blasting hole moves upward, the explosives are inserted into the inlet portion 30 and then injected into the blasting hole, and the explosives are lowered into the blasting hole using a pole while inserting the colorant. This is the case in which the support piece 42 moves upward due to the repelling pressure of the air remaining in the blasting hole during the moving process.

As shown in the drawing, the limiting protrusion 423 is formed in a form protruding outward from the end of the oblique portion 422, which narrows downward, so that the oblique portion 422 is formed in a wedge shape, and the outer When the support piece 42 moves upward due to the rebound pressure transmitted from the bottom through the limiting protrusion 423 protruding upward, the limiting protrusion 423 is caught on the inner wall of the blasting hole, causing the support piece 42 to move upward. restrict movement.

On the other hand, the body 10 is further provided with a contact means 50 that comes into contact with the inner wall of the blast hole by means of a discoloration material introduced into the pre-shaped blast hole. Doedoe made in the form of a ring, a part of the edge is cut to form a 'C' shape, and a fastening ring 51, and a plurality of contact pieces 52 radially disposed on the outer circumferential surface of the fastening ring 51.

The fastening ring 51 is detachably coupled to the outer circumferential surface of the body 10 through a central penetration. At this time, in order to improve convenience during coupling and separation, the fastening ring 51 has a ring shape with one side opened, that is, a 'C' shape. It is done.

The contact pieces 52 are radially disposed on the outer circumferential surface of the fastening ring 51 at intervals from each other, and each has a plate shape extending in the longitudinal direction.

At this time, the contact piece 52 has the same configuration as the support piece 42 described above, and duplicate descriptions will be omitted.

However, the close contact piece 52 is disposed below the support piece 42, and is disposed at a position filling the space formed between the support pieces 42.

Looking at this in more detail, a predetermined space is provided between a pair of adjacent support pieces 42 so that each support piece 42 has its own elastic restoring force. There is a problem, in the present invention, the adhesion piece 52 is disposed below the support piece 42, but the adhesion piece 52 is disposed directly below the space, so that the drawn in the color material is adhered to the adhesion piece 52 By filling the space between the outer wall of the body 10 and the outer surface of the support piece 42 to seal the space, the blasting pressure is transmitted to other adjacent blasting holes when explosives are blasted to prevent the occurrence of width or dead width. .

On the other hand, the body 10 is further formed with a spiral movement path 12 to which the fastening ring 51 is coupled. The spiral movement path 12 spirals upward and downward on the outer circumferential surface of the body 10 and is coupled. The fastening ring 51 ascends or descends while rotating along the spiral path 12.

At this time, the fastening ring 51 is formed with moving protrusions 511 that protrude at intervals from each other and are movably drawn into the spiral moving path 12 .

The height and position of the fastening ring 51 can be changed through the spiral movement path 12 formed in the body 10, and through this, the height and position of the contact piece 52 can be changed.

At this time, the concave depth of the spiral movement path 12 is formed to deepen from the upper part of the body 10 toward the lower part, and the contact piece 52 is disposed according to the position where the fastening ring 51 is disposed. position is adjusted.

Support of the elastic support means 40 coupled to the inlet portion 30 for the contact piece 52 of the adhesion means 50 coupled to the body 10 having a relatively smaller diameter than the inlet portion 30 It is possible to ensure the sealing force of the drawn-in color material only if it is arranged so that it is positioned on the same line in the vertical direction with the position where the piece 42 is arranged. That is, when the contact piece 52 disposed relatively lower than the support piece 42 of the elastic supporting means 40 is not in contact with the inner wall of the blasting hole but is disposed at a spaced position, the entire color drawn in through the spaced space. There is a problem in that it is difficult to provide sealing force due to leakage of water.

In the present invention, in order to correct the plus error and the minus error generated in the process of manufacturing the inlet part 30 and the body 10, and the elastic support means 40 and the close contact means 50, the body 10 The depth of the formed spiral movement path 12 is formed differently from the top to the bottom so that the fastening ring 51 coupled to the body 10 moves along the spiral movement path 12 while the position of the contact piece 52 is adjusted so that it is disposed on the same line as the support piece 42.

The rock blasting method (S1) using the multi-stage charge protection protector for the deck charging method for the deck charging method according to the present invention made as described above includes the blasting hole forming step (S10) of forming a plurality of blasting holes at regular intervals in the object to be blasted, and Injecting explosives to be injected into the formed blasting hole into a multi-stage charge protection protector, adjusting the elastic support means and the close contact means formed on the protector to be disposed on the same vertical line, and then introducing the explosive into the blasting hole (S20); The explosives injected into the blasting hole are moved downward using a pole and at the same time, the filling material inputting step (S30) of inserting the filling material into the blasting hole, the detonation preparation step (S40) of closing the upper part of the blasting hole, and blasting the explosives It includes a detonation step (S50) of detonating using a group.

The blasting hole forming step (S10) is a step of forming a plurality of blasting holes at a depth of 3 to 5m vertically at regular intervals on the object to be blasted, spaced apart from each other at regular intervals such as a checkerboard arrangement for uniform blasting construction of the object to be blasted. It is desirable to form as much as possible.

In the step of inserting the protector into which the explosive is inserted into the blasting hole (S20), the explosive is injected into the formed blasting hole, and the explosive is inserted into the above-described protector, and at this time, the protector is in close contact with the elastic supporting means provided in the protector. The position of the close means is adjusted so that the means are disposed at positions spaced apart vertically on the same vertical line.

In particular, the support piece constituting the elastic support means and the contact piece constituting the contact means are arranged up and down on the same vertical line so that each is in contact with the inner wall of the blasting hole, so that the color change material introduced in the discoloration material input step described later is the support piece and It is disposed in a form filled between the inlet portion, the lower surface of the contact piece and the support piece, and the outer surface of the body to provide sealing force at each position.

The warping material inputting step (S30) is a step of inserting the warping material at the same time as moving the explosives to the lower part of the blasting hole using a rod extending in the longitudinal direction such as a pole after inserting the protector into the blasting hole.

As described above, the applied colorant is filled in the space partitioned by the support piece and the contact piece.

The next detonation preparation step (S40) and detonation step (S50) are known in the general blasting method. Briefly, in the detonation preparation step (S40), the upper end of the blast hole into which the explosives are injected is closed, and the explosives are exploded. This upward movement is limited and at the same time the upward outflow of the explosive power is minimized.

In the detonation step (S50), a detonator pre-installed in the explosives and a fuse connected thereto are connected to the blaster, and then the blaster is operated to explode the explosives.

At the moment when the explosives are exploded in the blasting step (S50), the transfer of the explosive force filled in the space partitioned by the support piece and the close piece is minimized to the other nearby blasting holes, so that the explosives injected into each blasting hole are This is prevented and can provide a calculated explosive force in the installed position.

As described above, the present invention has been described by specific details such as specific components and limited embodiments and drawings, but these are provided to help a more general understanding of the present invention, and the present invention is not limited to the above embodiments. , Those skilled in the art in the field to which the present invention belongs can make various modifications and variations from these descriptions.

Therefore, the spirit of the present invention should not be limited to the described embodiments, and it will be said that not only the claims to be described later, but also all modifications equivalent or equivalent to these claims belong to the scope of the present invention. .

1: Multi-stage charge protection protector for deck charging method for rock blasting
10: body
11: weight 12: spiral movement
20: extension
30: inlet part
40: elastic support means
41: coupling ring 42: support piece
43: hooking means
421: straight part 422: oblique part
423: limit protrusion
431: catching groove 432: catching protrusion
50: adhesion means
51: fastening ring 52: close contact
511: moving protrusion

Claims (6)

a body 10 with one end in the longitudinal direction closed and the other end in the longitudinal direction opened;
Doedoe extending along the longitudinal direction from the other open end of the body 10, extending toward the outside (20);
an inlet portion 30 extending along the longitudinal direction from an end of the expansion portion 20 and into which explosives are introduced;
An elastic support means (40) that is detachably coupled to the inlet portion (30) and comes into contact with the inner wall of the blasting hole by means of an electric charge material introduced into the pre-shaped blasting hole,

In the body 10,
A close contact means (50) is further provided to contact the inner wall of the blasting hole by the colorant drawn into the pre-shaped blasting hole,
The adhesion means 50,
A fastening ring 51 formed in the form of a circular ring with a center penetrating vertically and having a 'C' shape by cutting a part of the rim;
A multi-stage charge protection protector for the deck charging method for rock blasting, characterized in that it includes a plurality of contact pieces 52 radially disposed on the outer circumferential surface of the fastening ring 51. The method according to claim 1, wherein the elastic support means 40,
A coupling ring 41 detachably coupled to the outer circumferential surface of the inlet portion 30;
It includes a plurality of support pieces 42 radially disposed on the outer circumferential surface of the coupling ring 41,
The support piece 42 is made in the form of a plate having a curvature corresponding to the inner wall of the blasting hole, one end in the longitudinal direction is coupled to the coupling ring 41, and the other end in the longitudinal direction is disposed inclined toward the outside. A multi-stage charge protection protector for the deck charging method for blasting rock. The method according to claim 2, in the support piece 42,
A multi-stage charge protection for the deck charging method for rock blasting, characterized in that a limiting protrusion 423 is formed on one surface disposed toward the inner wall of the blasting hole to limit the upward movement of the support piece 42. protector. delete The method according to claim 1, in the body 10,
A spiral movement path 12 to which the fastening ring 51 is coupled is formed,
The spiral moving path 12 is concave formed on the outer circumferential surface along the longitudinal direction of the body 10, and the depth of the concavity deepens as it goes from the top to the bottom. protective protector. A blasting hole forming step (S10) of forming a plurality of blasting holes at regular intervals on the object to be blasted;
Injecting the explosives to be injected into the formed blasting hole into the multi-stage explosive protection protector of claim 5, adjusting the elastic support means and the close contact means formed on the protector to be disposed on the same vertical line, and then inserting them into the blasting hole (S20);
(S30) of moving the explosives injected into the blasting hole downward using a pole and simultaneously injecting the colorant into the blasting hole;
A detonation preparation step (S40) of closing the upper part of the blast hole;
A blasting step (S50) of detonating the explosives using a blaster; a rock blasting method using a multi-stage charge protection protector for a deck charging method for rock blasting, characterized in that it includes.

Images