JPS6099355A - Blasting method combining expansible breaking agent - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for destroying (blasting) tough pulmonary objects with explosives in combination with an expansive destroying agent.

Traditionally, solid and brittle objects such as rocks have been destroyed using only explosives. However, with this method, areas other than the planned destruction areas were destroyed and surrounding facilities were damaged.

Furthermore, it has been difficult to prevent such damage, and it has also been difficult to reshape the fractured areas in a planned manner. Furthermore, explosives are frequently used and blasting vibrations are not infrequent, which makes the work less safe. Furthermore, even after destruction, the broken surface was damaged, making subsequent work dangerous.

The present invention solves the above problems, makes it possible to reliably create a planned destruction surface, does not damage other parts, and uses an expanding destruction agent that allows work to be carried out safely. The purpose is to provide a blasting method.

The blasting method using an expansible rupture agent of the present invention involves drilling several 11W holes or a single hole in a strong brittle object along an arbitrary fracture plan line, Filled with a slurry of an intumescent rupture agent, and the remaining perforations not filled with an intumescent rupture agent or one of the above-mentioned intumescent rupture agent filled perforations.
This method is characterized in that explosives are loaded into some or all of the perforations, and the blasting occurs after the expansion pressure of the expansible destructor is applied. The details will be explained below with reference to embodiment figures and the like.

First, the steps of the method of the present invention will be summarized.

1) First, a downward or upward perforation is made in the solid and brittle object to be destroyed. The perforations are drilled along one or more pre-planned lines of failure.

The perforation diameter, perforation length, perforation gap, etc. are arbitrarily determined as necessary. The broken spot drawing line can be any straight line or curved line.

The perforations may be in multiple tubes or in a single hole.

2) A part or all of the above-mentioned perforations are filled with a slurry of an intumescent disintegrating agent. The filling position within the borehole is arbitrary. It is optional to fill the entire hole or partially fill it. The placement of the expandable rupture agent filling holes is determined based on the rupture plan. Commercially available expandable destruction agents can be used.

3) Load explosives. (a) For the remaining holes that are not filled with the intumescent rupture agent, loading may be performed simultaneously with the filling of the intumescent rupture agent, or when the expansion pressure of the rupture agent is applied to the intumescent rupture agent filling hole. It may be done after the action has taken place.

(b) In addition, regarding the perforation to be filled with the expansible destructive agent, explosives may be loaded into the same perforation at the same time as the expansible destructive agent is filled, or the expansible destructive agent is filled first and the expansion pressure is applied. Later, the expandable destructive agent may be removed from the borehole and explosives may be loaded into the void. The loading position of explosives for drilling is arbitrarily determined. It may be filled over the entire length of the borehole or partially. Commercially available explosives can also be used.

4) Blasting is carried out after the action of the expanding pressure of the expanding rupture agent.

5) Various combinations of the above-mentioned methods can be used for charging the above-mentioned expandable destructive agent and charging the explosives.

Next, the present invention will be explained in detail with reference to several embodiment figures.

FIG. 1 shows the construction state of the method of the present invention when the expandable destructive agent filling holes and the explosives loading holes are arranged alternately in a straight line. Figure (α) is a plan view, (bJ is a cross-sectional view, (I),
(II), (ll) indicate the steps of the procedure. In the figure 1
is a brittle object such as concrete or rock to be destroyed, and 2 is a hole drilled in it. 3 shows the state filled with the expansive destructive agent, and 4 shows the state where the remaining perforations not filled with the expansive destructive agent are loaded with fire and chemicals. 5 is a planned destruction line.

Of course, as described above, the perforation positions can be arranged in accordance with any set drawing line, and the filling holes for the expansible destructive agent and the charging holes for explosives can be arranged every other number of holes. Blasting is carried out after the expansion pressure of the expansible rupture agent in the borehole No. 5 acts.

FIG. 2 is an explanatory diagram of the case where an expandable destructive agent and explosives are filled or loaded into the same perforation for destruction.

(α), (b), (I), (1), (m) in the figure
is the same as in FIG.

In the figure, 1 is a brittle object, 2 is a perforation, 6 is a filling state with a slurry of an expandable destructive agent, and 4 is a loading state of explosives. In this case, the perforations are arranged according to an arbitrary planned line. In addition, in the figure, the upper part of the hole is loaded with explosives, but it can be placed in any position such as the middle or lower part of the hole. The loading is carried out after the action of the inflation pressure of the intumescent rupture agent.

Figure 6 is an explanatory diagram of a method for filling a hole with an expanding destructive agent, generating expansion pressure, removing the expanding agent from inside the hole, and then loading explosives into the void to destroy it by blasting. be.

Figure (α) is a plan view, (I)) is a cross-sectional view, (I), (n
), (m), [Yes] 1) indicate the steps of the procedure.

The figure shows (I) first drilling a hole 2 in a brittle object 1, and (II)
Next, in the case of the figure, all the perforations are filled with an expansible rupture agent 6,
(III) After the expansion pressure of the expandable destructive agent is applied, the expandable destructive agent is removed from the borehole, and (song) explosives 4 are loaded into the empty borehole, blasting is performed, and the destruction plan +i! It shows that the brittle object breaks along iI5.

It goes without saying that the arrangement of the perforations can be adjusted to any planned line, and that the expansible rupture agent can be removed not in its entirety but in any desired amount.

FIG. 4 is an explanatory diagram of the case where the rows of filling holes for the expansible destructive agent and the rows of explosives loading holes are blasted and destroyed separately. figure(
α), (b), (I), (II), (Ill)
is similar to the previous example.

In the figure, all of the 50 rows of holes are filled with an expansible destructive agent, and all of the 5' row of holes are filled with explosives.

The perforation rows are not necessarily in series. After the expansion pressure is applied to the hole 5, blasting is performed using explosives in the 5' row. Destruction is 5-
Occurs between the 5' lines.

As mentioned above, in addition to the examples mentioned above, the arrangement of filling holes for expansive destructive agents, the arrangement of charging holes for explosives, filling and loading 1
Quiet combinations of changes in ° are possible.

According to the method of the present invention described above, there is no destruction of parts other than the planned destruction parts, there is no damage to surrounding facilities, and the destruction parts can be reshaped in a planned manner. In addition, compared to conventional blasting methods, the frequency of use of explosives and blasting vibrations are reduced, which increases the safety of the work, and the subsequent work is also safe because there is no damage to the fractured surface even after the destruction.

Next, an example of blasting construction using the method of the present invention will be described.

To prevent damage to the rock, conventional smooth blasting (
SB) method has been adopted, but in place of this SB method, a blasting method using an expansible destructive agent was adopted.

Implementation location: Chuo Expressway Enayama tunnel ventilation shaft shaft Size: Diameter 6.2 mφ, length 36 m Drilling specifications: Hole diameter 115 mm, number of holes 24 holes perforation interval 8001 m Destructive agent used: Destruction using a commercially available quicklime-based expansive destructive agent Explosives used from the bottom to the mouth: Commercially available explosives The blasting method of the present invention was applied to 24 peripheral holes from the bottom to the top of the shaft.

A total of 12 holes, every other hole among the 24 peripheral holes, are filled with an expandable rupture agent, and after a predetermined period of time (after the expansion pressure of the expandable rupture agent has been applied), the holes other than the holes filled with the expandable rupture agent (a total of 12 holes) are filled with the expandable rupture agent. ) was loaded with explosives and exploded. As a result, the blasting work could be carried out safely without damaging the surrounding bedrock or surrounding facilities, and the subsequent work could also be carried out safely.

[Brief explanation of the drawing]

Figures 1, 2, 3, and 4 are explanatory diagrams of various forms of blasting methods using the expansible destructive agent of the present invention, and (α) in each figure is a plan view, Φ) is a sectional view. Further, (I), (n), (Iil), and (1111) indicate the steps of the procedure. 1: Brittle object, 22 holes, 3: Expandable destructive agent, 4: Explosives, s, b': Fracture planning line. Agent Masuju Sanro Kimura 1st I! 1 (o) (b) 12f! f

Claims (1)

[Claims] 1) A plurality of holes or a single hole is drilled in a strong brittle object along an arbitrary fracture plan line, and a part or all of the holes are filled with a slurry of Kjl & a destructive agent. , characterized in that explosives are loaded into the remaining perforations that are not filled with the expansible destructive agent or into some or all of the perforations filled with the expansible destructive agent, and the blasting is performed after the expansion pressure of the expansible destructive agent is applied. A blasting method that uses an expansive destructive agent. □ 2) The first aspect of the present invention is characterized in that, in the charging of the explosives into the expandable destructive agent filling hole, the explosives are loaded into the same hole at the same time as the expanding destructive agent slurry is being filled. A blasting method using an expansible destructive agent as described in Section 1. 6) In loading explosives into the expandable destructive agent-filled hole, after the expansion pressure of the expandable destructive agent filled in the hole acts, the expandable destructive agent is removed from the hole, and the explosive is filled into the void. A method of blasting in combination with a soft expansible rupture agent as set forth in claim 1, characterized in that: