JPH07308597A - Method for crushing material to be crushed - Google Patents

Abstract

PURPOSE:To crush a material to be crushed such as base rock and concrete without producing any loud report and without any danger by this method. CONSTITUTION:A hole 9 is bored in a material 7 to be crushed, a hollow injection bolt 11 with plural injection holes 1103 formed in the peripheral surface is inserted into the hole 9, the space between the inlet of the hole 9 and the base of the bolt 11 is closed with a sealing material 12, an unexpanded expandable resin 25 is filled in an annular space 13 between the bolt 11 and hole 9 from the internal passage 1101 of the bolt 11 through the injection hole 1103, and the resin 25 is expanded while the bolt 11 is inserted in the hole 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crushing method for crushing rocks, concrete and the like.

[0002]

2. Description of the Related Art Explosives such as dynamite have been mainly used in the past for crushing or excavating rock or concrete.

[0003]

However, in the crushing method using explosives, there is a problem that a large explosion sound occurs, and there is a danger not only when handling explosives but also when exploding because fragments are scattered during the explosion. There was a problem with.
The present invention has been devised in view of the above circumstances, and an object of the present invention is to crush objects to be crushed, such as bedrock and concrete, without causing a large explosion sound and without any danger. It is to provide a crushing method.

[0004]

In order to achieve the above object, the present invention provides a hole in a crushed object, fills the hole with an unfoamed expandable resin, and fills the expandable resin in the hole. It is characterized in that the object to be crushed is crushed by foaming. Further, the present invention, the unfoamed foamable resin,
It is characterized in that it is filled in the hole together with a foaming accelerator. Further, in the present invention, the hole is opened at a predetermined depth,
A hollow injection bolt, which extends along the depth direction of the hole and has a plurality of injection holes formed on the outer peripheral surface thereof, is inserted into the hole, and the foamable resin is injected at the inlet of the hole. While the space between the bolt and the base is closed, it is filled from the internal passage of the injection bolt through the injection hole into the annular space between the injection bolt and the hole, and the injection bolt is inserted into the hole. It is characterized in that the foamable resin is foamed in the above state.

[0005]

FUNCTION The force generated when the volume of the expandable resin expands acts on the inner peripheral wall of the hole of the crushable object, and the crushable object is crushed.

[0006]

EXAMPLES Examples in which the present invention is applied to the crushing of rocks will be described below with reference to FIGS. 1 to 4. First, as shown in FIG. 1, the rod 3 of the rock drill 1 is rotationally driven, and a hole 5 having a predetermined depth is formed in the rock 7 by the cutter 5 at the tip of the rod 3. Next, as shown in FIG. 2, the injection bolt 11 is inserted into the hole 9 so that the inlet 9A of the hole 9 and the injection bolt 1
The space between the first base portion 11A and the base portion 11A is closed with a sealing material 12 such as a mortar component or a special bonding agent (trade name: Eslon drainite). The injection bolt 11 is hollow and has a passage 1101 formed therein.
A large number of holes 1103 communicating with 101 are formed.
The inner diameter of the hole 9 to be excavated in the bedrock 7 is
An annular space 13 for filling the foamable resin is formed on the outer side of the above so as to have a size.

Next, as shown in FIG.
The check valve 15 is connected to the base end of the, and the mixing unit 17 is connected to the check valve 15. Mixing unit 17
Is equipped with two delivery hoses 19 and 21 and a T joint 23 to which these delivery hoses 19 and 21 are connected. Is supplied with a foaming accelerator, is mixed in the T joint 23, and passes through the check valve 15, the passage 1101 of the injection bolt 11, the hole 1103, and the foaming resin 25 is in a non-foaming state.
3 is filled. Urethane foam, rubber foam or the like is used as the foaming resin 25, polyols or prepolymers are used as the foaming accelerator, and the foaming resin 25 starts foaming depending on the mixing ratio of the foaming accelerator. Until the time is adjusted.

The unfoamed foaming resin 25 filled in the space 13 is foamed after a lapse of a predetermined time, and its volume tends to expand. At the time of this volume expansion, the pressure acts on the inner peripheral wall of the hole 9 radially outward of the hole 9. As a result, as shown in FIG. 4, the bedrock 7 is cracked or cracked from the inner peripheral wall of the hole 9 toward the outside in the radial direction of the hole 9, and the bedrock 7 is crushed.

According to this embodiment, a hole 9 is made in the bedrock 7,
Since the hole 9 is filled with the foaming resin 25 in an unfoamed state, foamed in the hole 9 and the force generated when the volume of the foaming resin 25 expands is used to crush the bedrock 7, It is possible to crush the bedrock 7 without causing a large explosion sound unlike the crushing method using the explosive. In addition, since explosives do not explode, they can be handled easily without danger,
In addition, fragments are not scattered during crushing, which is advantageous in terms of safety of crushing work.

Further, in the embodiment, the injection bolt 1 is inserted in the hole 9.
Since the expandable resin 25 is foamed in the state in which 1 is extended, the force generated when the expandable resin 25 expands in volume is efficiently directed to the outside of the hole 9 in the radial direction by the injection bolt 11. This is advantageous for crushing the bedrock 7.

[0011]

As is apparent from the above description, according to the present invention, the object to be crushed is provided with a hole, the hole is filled with an unfoamed expandable resin, and the expandable resin is foamed in the hole. Since the object to be crushed is crushed by, it is possible to crush the object to be crushed, such as bedrock and concrete, without causing a large explosion sound and without any danger.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of making a hole in rock by a rock drill.

FIG. 2 is an explanatory diagram of inserting an injection bolt into a hole of rock.

FIG. 3 is an explanatory view of filling a hole of a rock bed with a foaming resin from an injection bolt.

FIG. 4 is an explanatory diagram in which the rock mass is crushed by the foaming of the expandable resin.

[Explanation of symbols]

 7 Rock 9 Hole 11 Injection Bolt 12 Sealing Material 13 Space 17 Mixing Unit 25 Foaming Resin

Claims (3)

[Claims] 1. A crushed object is crushed by forming a hole in the crushed object, filling the hole with an unfoamed expandable resin, and foaming the expandable resin in the hole. A method for crushing an object to be crushed. 2. The method for crushing an object to be crushed according to claim 1, wherein the unfoamed foamable resin is filled in the holes together with a foaming accelerator. 3. A hollow injection bolt having a predetermined depth formed in the hole, extending in the depth direction of the hole, and having a plurality of injection holes formed on an outer peripheral surface thereof. The foamable resin is inserted into the annular space between the injection bolt and the hole through the injection hole from the internal passage of the injection bolt in a state in which the foam resin is closed between the inlet of the hole and the base of the injection bolt. The method for crushing an object to be crushed according to claim 1 or 2, wherein the foamable resin is foamed by being supplied to fill the hole and the injection bolt being inserted into the hole.