JPS62133288A - Method of crushing rock - 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 Field of the Invention The present invention relates to a rock crushing method using two-phase detonation.

Prior art This type of conventional rock crushing method uses air-C, H, or 02, C
, 11. That is, first, the two gases to be mixed are sealed into the detonation tube 2 through the gas inlet 1.1' as shown in FIG. This detonation tube 2 is attached to a hole 3 previously drilled in a rock.

Then, after keeping the initial pressure constant, the spark plug 4 ignites.

The detonation phenomenon has reached Loveture Disk 5,
When a certain pressure is exceeded, the shock pressure is transmitted in the direction of the arrow by breaking this loveture disk 5, and as a result, the rock 6 is destroyed.

Problems to be Solved by the Invention However, gas-to-gas methods are highly dangerous in generating detonation phenomena, and cannot be easily operated in the field.

As an experimental example of rock crushing due to gas/gas detonation, the andesite shown in Figure 3 (-axial compressive strength σ
c=503IQ? /cn, - axial pressure tensile strength σt =
42 k5'/lJ, elastic wave velocity p = 265
If detonation is generated with gas/gas (in this case, CxHt 10%, air 90%, initial pressure 30 to 9/d) in a 7 m 7 generation), it is possible to roughly divide it without flying stones.

Purpose of the Invention The present invention was made in view of the above-mentioned circumstances, and its purpose is to enable operation at low gas pressures, to be easy to operate in the field, and to shorten the reaction time and pressure duration. It is an object of the present invention to provide a rock crushing method in which the length of the rock is increased and the crushing effect is increased.

Means and Effects for Solving the Problems In order to achieve the above object, the present invention causes a combustion reaction between a combustion-supporting gas and a combustible substance other than gas in the detonation tube 10 to cause a detonation phenomenon. It is designed to generate impact pressure and apply it to the rock.

Example Embodiments of the present invention will be described below with reference to FIG.

In the drawing, 10 is a detonation tube, and a head member 11 is attached to the distal end of the detonation tube 10, and an inlet 1 is attached to the inner end surface of the head member 11.
2, and a plurality of outlets 13 communicating with the inlet 12 are formed on the circumferential surface of the head member 11.

The inlet 12 of the head member 11 is closed with a loveture disk 14, and the loveture disk 14 is a 0.3 wg aluminum plate.

A closing member 15 is provided at the rear end of the detonation tube 10, and the closing member 15 is provided with a gas inlet 16 and a spray pulp 17, and the detonation tube 10 is provided with a spark plug. A plug 18 is provided.

Next, the rock crushing action using the detonation generating device A as described above will be explained.

This detonation generator A is installed in a hole 20 drilled in a rock 19, and one type of combustion-supporting gas is sealed into the detonation tube 10 from the gas inlet 16 to maintain a certain initial pressure.

Next, oil such as heavy oil, kerosene, light oil, etc. is supplied into the detonation tube 1o using the spray pulp 17, and at the moment when the oil is homogenized, it is ignited by the spark plug 18 to cause detonation (explosion a).

This series of phenomena is very similar to that of a diesel internal combustion engine, but in the case of a diesel internal combustion engine, the fuel spontaneously ignites at high temperature and high pressure, whereas in the detonation of the present invention, gas is ignited at room temperature and under high pressure. Keep it contained,
In terms of ignition, it can be said to have an intermediate mechanism between a diesel internal combustion engine and a gasoline internal combustion engine.

Note that the spiral-shaped obstacle (A) in the figure is intended to facilitate the occurrence of detonation by intentionally causing turbulence in the airflow.

The detonation phenomenon described above is the Loveture Disk 14.
When it reaches and exceeds a certain pressure, this loveture disc 14
The shock pressure propagates in the direction of the arrow, and as a result, the rock 19 is destroyed.

There is also a gas-film method for generating detonation.

This can be done by applying carbon to the inner wall of the detonation tube 10 to form a film, or by pasting a film of carbon to the inner wall of the detonation tube 7'lO, filling it with gas, and then igniting it to generate the detonation phenomenon. It is something that makes you

Effects of the Invention As detailed above, the present invention causes a combustion-supporting gas and a combustible substance other than gas to undergo a combustion reaction in the detonation tube 10 to generate a detonation phenomenon and apply impact pressure to rock. This is a rock crushing method that has the following characteristics.

Therefore, compared to the conventional gas/gas method, the initial volume is smaller because the fuel is in a condensed phase (liquid or solid), and the calorific value is greater, so the explosive power is much greater even at the same initial pressure.

In other words, it can be operated at a lower gas pressure, making it easier to operate on-site.

Also, since the reaction system is two-phase, the fuel is atomized into the gas phase→
Since the process of vaporization → diffusion is required, the reaction time is long, and the pressure duration is also long, which increases the destructive effect.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the configuration of a detonation generator used in the method of the present invention, FIG. 2 is an explanatory diagram of the configuration of a detonation generator used in the conventional method, and FIG. 3 is an explanatory diagram of andesite crushing by the conventional method. 10 is a detonation tube.

Claims (1)

[Claims] A rock crushing method characterized in that a combustion-supporting gas and a combustible substance other than gas are caused to undergo a combustion reaction in a detonation tube 10 to generate a detonation phenomenon and apply impact pressure to rocks.