JPS61204500A - Lock bolt striking construction method and rock driller usedtherein - 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 Industrial Application The present invention relates to a rock bolt driving method for driving rock bolts into collapsible ground such as a ground containing boulders and boulders, and a rock drill used therein.

Problems to be Solved by the Invention Conventionally, rock bolts were driven in by using a rock drill to drill holes in the ground, and then hammers, augers, picks, etc. were used to drive the rock bolts.

Therefore, separate equipment was required for drilling and pouring.

In addition, in collapsible grounds such as rocks containing boulders, boulders, and fractured zones, even if holes were drilled, the ground would collapse and rock bolts could not be driven.

Furthermore, when using rock drills, it was necessary to add relatively short rock bolts and repeat the installation process. ! Means for Solving the Problems The rock bolt driving method according to the present invention was developed in order to solve the above-mentioned problems. Attach the drilling rod with a hole attached to the tip to the rock drill body to drill a hole in the rock, then remove the auxiliary rod while leaving the drilling rod in the hole, and use the drilling rod to drill from the anchorage injection hole. By injecting fixing material into the hole and pulling out the drilling rod from the hole, then attaching a rock bolt to the rock drill body and driving the rock bolt into the hole, the hole can be drilled and drilled using only a rock drill. The fixing material prevents the collapse of the drilled ground.

In addition, the rock drill according to the present invention has a guide that is movably attached to the rock drill body, and is rotatably mounted around the center line of the guide. A bolt gripping device having a mechanism is provided, and long lock bolts can be gripped by the bolt gripping device and continuously driven.

EXAMPLE The present invention will be described in detail below based on an example shown in the drawings.

(1) Rock Drilling In the diagram, A is a rock drilling rock, and a rock drilling machine body 1 is mounted on a guide 2 so as to be movable in the longitudinal direction. The guide 2 is rotatably attached to the pool 3.

That is, shafts 4, 4 are supported by pins at the ends of the pool 3, and a guide 2 is attached to the shafts 4, 4 so as to be rotatable about the center line of the guide 2.

A bolt gripping device 5 is provided protruding from the side surface of the rock drill body 1. The six-bolt gripping device 5 has a port insertion hole 5a extending parallel to the guide 2 through it, and also has a locking mechanism.

A rod receiver 6 and a rod fixing device 7 having a locking mechanism are attached to a shaft 4 on the tip side of the pool 3.

8 is a removable shank, and the shape shown in FIGS. 13 to 16 can be replaced and used as desired.

In Figure 1, the shank 8 used is the one in Figure 13,
A drilling rod 9 is attached to the shank 8.

The drilling rod 9 has a cylindrical shape, has a female thread on its inner circumferential surface at its base end, and is screwed into the shank 8 .

A rod-shaped auxiliary rod 10 is housed within the drilling rod 9. A blow hole 11 is passed through the auxiliary rod 10 in the longitudinal direction. It is screwed onto the outer base end 8 of the auxiliary rod 10. The tip of the auxiliary rod 10 is formed into a spherical shape.

A perforation pit 12 is attached to the tip of the perforation rod 9. An auxiliary rod storage hole 13 is recessed from the base end of the drilling pit 12, and the bottom surface of the auxiliary rod storage hole 13 is formed in a spherical shape.

A blow outlet 14 is formed from the bottom of the auxiliary rod storage hole 13 and opens at the tip, and a fixing material injection hole 15 having a relatively large diameter is passed through from the inner surface to the outer circumferential surface. The drilling bit 12 has a female screw threaded into the auxiliary rod storage hole 13, and is screwed onto the tip of the drilling rod 9. Drilling bit! The auxiliary rod 1 is placed in the auxiliary rod storage hole 18 of 2.
The blow hole 11 communicates with the blow outlet hole 14, and the fixing material injection hole 15 is closed by the tip of the auxiliary rod 4.

(2) The rock drilling machine body 1 is rotated and moved forward along the guide 2 to start drilling.

After completing the drilling of the 1st grain rod 9 length, the rod fixing device 7
The rod 9 is fixed, the rock drill main body 1 is rotated in the opposite direction, the shank 8 is removed, and the rock drill body 1 is moved back toward the user.

Next, connect the drilling rod 9 into which the auxiliary rod 10 shown in FIG. 12 has been inserted to the shank 8, and
is pulled out and connected to the preceding auxiliary rod 10. When the rock drill main body 1 is operated, the drilling rod 9 is automatically screwed and connected to the preceding drilling rod 9. Loosen the rod fixing device 7 and drill the hole again.

(3) After the fixing material injection is completed, the drilling rod 9 is fixed by the rod fixing device 7, the shank 8 is removed, and the auxiliary rod drawing shank 8 shown in FIG. 14 is attached to the rock drilling machine body 1.

The shank 8 is connected to the auxiliary rod 0, the rock drill main body 1 is moved backward, the auxiliary rod 10 is pulled out, and each set is unscrewed and recovered.

Connect the short injection pipe 16 shown in FIG. 3 to the perforation rod 9,
The injection shank 8 shown in FIG. 15 is attached to the rock drill main body 1 and connected to the injection short pipe 16.

A cylindrical rubber stopper 17 with a tapered outer circumferential surface divided into two parts on the left and right is provided at the tip of the guide 2 to prevent the fixing material from flowing out.
Cylinder 1 located on the outer periphery of rod 9 and built into shaft 4
8 to close the drilled hole 19.

In this state, the fixing material 20 is sent from a pump connected to the short injection pipe 16, and is injected into the drilled hole 19 using the drilling rod 9. The drilling rod 9 is moved back and pulled out from the drilling hole 19 according to the injection amount.

To recover the rod 9, first disconnect the short injection tube 16 and the rod 9, then fix the rod 9 with the rod fixing device 7, and unscrew the front rod 9 to remove it. Thereafter, the short injection tube 16 and the rod 9 are reconnected, the fixing device 7 is loosened, and the rod 9 is pulled out while injecting.

(4) After collecting the rock bolt driving hole rod 9 and injecting the fixing material 20, replace the shank 8 of the rock drill main body 1 with the rock bolt shank 8 shown in FIG. The lock port 21 is attached and received by the rod receiver 6.

The rock drill body 1 is advanced along the guide 2 to drive the rock bolt 21 into the drilled hole 19. After driving one lock bolt 21, additional lock bolts 21 are installed each time by the same operation.

The collapsible rock will not collapse because the fixing material 20 has already been injected into the borehole 19.

(5) Driving a long lock bolt When driving a long lock bolt 21, loosen the push-in type rotation fixing tightening handle 22 provided on one shaft 4, and insert it into the other shaft 4. Then, the rotation fixing lever 23 is removed, the guide 2 is rotated to project the bolt gripping device 5 upwards, the handle 22 is tightened again, the lever 23 is inserted, and the guide 2 is fixed. Insert bolt 2 into bolt insertion hole 5a.
1 and lock it. The bolt 21 is received by the rod receiver 6. The rock drill main body 1 is advanced along the guide and the bolt 21 is pushed into the drilled hole 19.

After pushing in for one stroke, the bolt gripping device 5 is unlocked, the rock drill body is moved backward, and the bolt 21 is pushed in again after being locked.

Effects of the Invention The rock bolt driving method according to the present invention has the above-mentioned configuration, in which the fixing material is injected into the hole using a drilling rod, and then the rock bolt is inserted into the hole using a rock drill. Because it is pushed into the ground, the collapsible ground can be supported by the anchoring material, and it becomes possible to drill holes and drive rock bolts using only a rock drill.

Further, the rock drill according to the present invention can grip a long rock bolt with the bolt gripping device and continuously drive the rock bolt into the borehole by reciprocating the rock drill body.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view of the Iwatsuki drill, Figs. 2 to 5 are detailed explanatory views of the invention, Fig. 6 is a partially enlarged side view,
FIG. 7 is a front view of the rubber stopper 17 for preventing fixing material from flowing out, FIG. 8 is a side view of the bit, and FIG. 9 is a longitudinal sectional view of the drilling rod.
FIG. 10 is a sectional view taken along the line X-X, FIGS. 11 and 12 are longitudinal sectional views of the auxiliary rod, and FIGS. 13 to 16 are longitudinal sectional views of the shank. A... Rock driller, 1... Rock drill body 2... Guide, 3... Boom, 4... Shaft 5... Bolt gripping device, 6... Rod receiver 7... Rod fixing device, 8...
・Shank 9: Drilling rod, 10: Auxiliary rod 1
1...Blow blow hole, 12...Drilling bit 13...Auxiliary rod storage hole 14...Blow blowing hole, 15...Fixing material injection hole 16...
・Short pipe for injection, 17 ・・Rubber stopper for preventing falling material from flowing out, 18
・・Cylinder, 19・・Drilling hole 20・・Fixing material, 21・・
Lock bolt 22... Tightening knob for fixing rotation 230 bolt

Claims (2)

[Claims] (1) A drilling rod with an auxiliary rod stored inside and a bit with a fixing material injection hole attached to the tip is attached to the rock drill body to drill a hole in the ground, and the drilling rod is inserted into the hole. Remove the auxiliary rod while leaving it in place, use the drilling rod to inject fixing material into the drilling hole from the fixing material injection hole, and pull out the drilling rod from the drilling hole.After that, attach the rock bolt to the rock drill body and drill the hole. A rock bolt driving method characterized by driving a rock bolt inside. (2) A guide to which the rock drill body is movably attached is attached to the boom so as to be rotatable about the guide's longitudinal center line, and a bolt insertion hole and a locking mechanism are provided that pass through the side of the rock drill body parallel to the guide. A rock drilling machine characterized by being provided with a bolt gripping device having the following features.