JPS58140600A - Method and device for charging detonator - 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 an explosive loading method and apparatus for drilling a rock and loading an explosive for rock crushing into the rock hole.

Conventionally, when loading explosives for rock fragmentation into rock in tunnel construction, etc., a hole is drilled into the rock using a drilling device to form a hole in the rock, and after the drilling is completed, the drilling device is removed and the hole is opened in the rock. Generally, a method is adopted in which a loading pipe is inserted into the pipe and powder or liquid explosives are loaded from the rear end of the pipe using compressed air pressure.

However, in this conventional explosive loading method, the drilling device for drilling into the rock is removed before loading the explosive, and the loading hose of the explosive loading device is set. The disadvantage was that the rock hole was uneven, making it difficult to insert the loading pipe, requiring a lot of man-hours, and requiring a separate explosive pipe from the hole-drilling device, increasing equipment costs.

In view of the above, the present invention is designed to supply a fluid such as air or water from the tip of a bit attached to the tip of the rod through the center hole of the rod in order to discharge the cutting powder during drilling, which is normally provided in a drilling device. A powder or liquid explosive is pumped through the center hole of the rod when the rod is retreated from the bottom of the rock hole after the drilling device completes drilling into the rock by using a fluid supply device that ejects the fluid. By loading the explosive into the rock hole in front of the bit, the explosive can be loaded at the same time as the drilling device is removed, thereby shortening the work time and man-hours in the explosive loading work, and eliminating the need for a loading pipe. In order to reduce equipment costs, the present invention provides an explosive loading method in which a hole is drilled into a rock and an explosive is loaded into the hole in the rock. While pressing the bit against the rock while applying a When retreating from the bottom of a rock hole,
The explosive supply device, which has an explosive supply passage communicating with the center hole of the rod, pumps the explosive through the center hole of the rod and loads it into the rock hole in front of the bit, allowing the explosive to be loaded at the same time as the drilling device is removed. It was made so that it could be done.

Furthermore, it is an object of the present invention to provide an inexpensive explosive loading device for use in carrying out the above explosive loading method. a drilling device that applies impact vibration and rotational motion; a fluid supply device that is installed in the drilling device and that jets fluid for discharging powder from the tip of the bit through the center hole of the rod; and the fluid supply device and an explosive supply device having a rounded explosive supply passage for delivering powder or liquid explosive connected to the fluid passage of the rod, and the explosive is pumped through the center hole of the rod and loaded into the rock hole in front of the bit. It was designed to do so.

Embodiments of the present invention will be described in detail below with reference to the drawings.

1 and 2 show an explosive loading device A used in the explosive loading method of the present invention, and 1 is a vehicle chassis equipped with a crawler mechanism 2, and the chassis 1 has a boom 5 that extends and contracts with hydraulic pressure. The lower end of the boom 6 is connected and supported, and the boom 6 moves up and down and turns by the extension and contraction of two hydraulic cylinders 4.5 for lifting and lowering and turning, respectively, which are arranged between the middle part of the boom 6 and the chassis 1. The operation is controlled by. On the other hand, a guide cell 6 is connected and supported at the upper end of the boom 6, and the guide cell 6 has three hydraulic cylinders 7 for longitudinal movement, elevating and turning, which are arranged between the boom 7 and the boom 5. 8.
The operation is controlled by the telescopic operation of 9 to perform each movement of forward and backward movement, vertical movement, and rotation. Further, on the guide cell 6, a pile rock 10 is slidably mounted, and a chain (not shown) that rotates along the guide cell 6 by the drive of a chain feed motor 11 is mounted on the pile rock 1°. The chain feed motor 11 moves the drilling rock 10 back and forth on the guide cell 6. The output shaft 10a of the rock drill 10 is connected to two rods 14 connected in series by a joint 15, for example, via a swivel adapter 12.
14 are coaxially connected, and a drilling bit 15 is attached to the tip of the rod 14 on the forward side. and,
The operation of the above-mentioned drill bit 10 imparts impact vibration and rotational motion to the bit 15 via the Shirorad 14.14.
A drilling device 16 having a diameter of 16 mm is provided.

Inside the rod 14.14 of the drilling device 16, as shown in FIG.
14a is formed through the bit 15, and the front end of the center hole 11L of the front rod 14 opens forward through the center hole 15a formed in the bit 15, while the center hole 14a of the rear rod 14 The rear end is connected to a compressed air source 18 through a communication passage 12a and an air supply passage 17 formed in the swivel adapter 12, and the compressed air for discharging starch powder supplied from the compressed air source 18 is sent to the rod 14. An air supply device 19 is configured to eject air from the tip of the bit 15 through central holes 14a, 14a of .14.

Further, in the middle of the air supply passage 17 of the air supply device 19, there is a 3-port switching valve 20 having three switching positions: an air supply position (a), a stop position (b), and an explosive supply position (c). and the explosive supply position of the switching valve 20 (
The boat for sending out air in c) has an explosive storage container 2 that collects powder or liquid explosive E through a compressed air passage 21.
2 is stored, and the explosive outlet 22a of the explosive storage container 22 is connected to the downstream side of the switching valve 20 of the air supply passage 17 via the explosive supply passage 25. Therefore, the air supply device 1
A droplet supply device 24 has an explosive supply passage 25 connected to the air supply passage 17 of No. 9.

Using the explosive loading device A having the above configuration,
First, as shown in FIG. 1, after setting the drilling device 16 at a predetermined position with respect to the rock R, the drilling tool 10 is operated to remove the drilling bit 15 attached to the tip of the rod 14.
While applying impact vibration and rotational motion to the bit 15, the bit 15 is pressed against the rock R by the forward movement of the drilling rock R, thereby drilling a rock hole R1 in the rock R.

Meanwhile, the switching valve 20 is switched to the air supply position (a), and the air supply device 19 blows out air from the tip of the bit 15 through the center holes 14a, 14a of the rods 14. The leftover chestnut powder is discharged from the rear (opening) of the rock hole R1.

When the rock hole R1 reaches a predetermined depth due to such drilling, the operation of the rock driller 10 is stopped. After this drilling is completed, the drilling rock 10 is retreated and the rod 14, 14 is inserted into the rock hole R.
Extracted from 1. When the rods 14, 14 are retracted, the switching valve 20 is switched to the explosive supply position (c) as shown in FIG.
, and the compressed air pressure moves the explosive E in the explosive storage container 22 together with the air into the explosive supply passage 25 ,
Air supply passage 17 and center hole 14 of rods 14, 14
a, 14a, and discharged from the tip of the bit 15, and loaded into the deep part of the rock hole R3 in front of the bit 15. In response to the loading of this explosive E, Iwatsuki 10 retreats. After filling the rock hole R1 with a predetermined amount of explosive E in this way, the rod 14,
14 was completely pulled out from the rock hole R, and the explosive loading work was completed.

Therefore, in this way, the rock mass R by the drilling device 16 is
After the drilling is completed, the rod 14.14 is withdrawn from the bottom of the rock hole R1 and the explosive E is loaded into the rock hole R1. Compared to the conventional method of loading, the time required to load the explosives into the drilling machine is extremely short, and there is no need to insert and pull out the loading pipe of the conventional explosive loading device, thus reducing the time required for explosive loading work. Also, the number of man-hours can be reduced.

In addition, since the air supply passage 17 of the air supply device 19 for discharging scraps is used to load the explosive E, a loading pipe is not required, and it can be carried out by simply modifying a part of a normal drilling device. Therefore, equipment costs can be reduced.

Incidentally, in the above embodiment, the case was described in which the explosives E were force-fed (<discharge of powder) was performed using compressed air, but it may also be performed using water pressure.

Further, in the above embodiment, an example of application to a self-propelled drilling device equipped with the crawler mechanism 2 has been described, but the present invention is also applicable to a stationary type drilling device.

As explained above, according to the explosive loading method V of the present invention, a hole is drilled in the rock while the fluid for discharging chips is ejected from the tip of the bit through the center hole of the rod using the drilling device, and after the drilling is completed. When the rod is pulled out of the rock hole, the explosive is pumped through the center hole of the rod and loaded into the rock hole in front of the bit, so the loading of the explosive is done at the same time as the rod is pulled out. It is possible to shorten the working time and the number of man-hours for the explosive loading work, and it also eliminates the need for a dedicated explosive loading device as in the past, thereby reducing equipment costs.

Further, since the explosive loading device of the present invention is a partially modified conventional drilling device, it can be provided easily and at low cost.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a side view of rock drilling, FIG. 2 is a side view of explosives being loaded, and FIG. 3 is an enlarged vertical sectional view of the rod portion.

Claims (2)

[Claims] (1) An explosive loading method in which explosives are loaded into a hole in the rock by drilling a hole in the rock, using a drilling device to generate shock vibrations on a bit attached to the tip of a rod and blowing out air or water from the tip of the rod. A hole is drilled into the rock so that the cutting powder is discharged from the rear, and when the rod is retreated from the bottom of the rock hole after drilling, the explosive is supplied by an explosive supply device equipped with an explosive supply passage communicating with the center hole of the rod. A method of loading explosives characterized by feeding the explosive through the center hole of the rod and loading it into the rock hole in front of the bit. (2) An explosive loading device for drilling into rock and loading explosives into the rock hole, which includes a drilling device that applies shock vibration and rotational motion to a bit attached to the tip of a rod, and a drilling device provided in the drilling device, A fluid supply device for ejecting a powder discharge fluid from the tip of the bit through the center hole of the rod, and an explosive supply passage connected to the fluid passage of the fluid supply device for delivering a powder or liquid explosive. What is claimed is: 1. An explosive loading device comprising: an explosive feeding device having an explosive feeding device, wherein the explosive is fed under pressure through a center hole of a rod and loaded into a rock hole in front of the bit.