JPH0464687A - Drilling capacity adjusting method of rock facing machine - Google Patents

Abstract

PURPOSE:To improve the extent of operation efficiency by enabling the yielding energy of respective lifters of a swing plate and a side drill to be set to plural stages according to the lithologic matter of a rock bed, while adjusting a drill hole level again at time of no-load operation. CONSTITUTION:Each drilling level (impact pressure) of a main lifter 8 impacting a swing plate 10 and a side lifter 9 impacting a side drill 11 according to the lithologic matter of a rock bed to be drilled is selected by a rock facing mode switch of a controller 26. Then, both these lifters 8, 9 are operated via a solenoid selector valve 30 and solenoid proportional flow valves 23, 24, 25 and the plate 10 and the drill 1 are operated, drilling the rock bed. Next, when the lithologic matter is varied during drilling operation and no-load drilling has occurred, a main lifter impact pressure adjusting knob and a side lifter impact pressure adjusting knob both are operated according to the lithologic matter and the drilling level is readjusted. With this constitution, the operation efficiency is thus improvable.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for adjusting the drilling capacity of a rock milling machine that splits a rock while forming slits in the rock.

(Prior Art) Conventionally, when excavating a tunnel or the like in rock, a rock grinder as shown in FIG. 9 is used.

The rock surface grinder is provided with a swing plate (b) which is swingable in the horizontal direction and has a line bif (a) attached to its tip, and which is rotatably provided on both sides of the swing plate (b).

It also has a side drill d with a drill pin C attached to its tip; 1 while applying an impact to the rear ends of the plate b and the side drill d by a main drifter r and a side drifter g installed on a feed table e;
Holes are drilled using a side drill d and slits are formed using a line bit a.

(Problems to be Solved by the Invention) In the conventional rock surface grinding machine described above, rock is excavated with the line bit a attached to the tip of the swing plate b by swinging the swing plate b in the horizontal direction. Drill d rotates while applying an impact and drills a hole in the rock using drill focus C, so the drilling mechanisms of the two are different from each other.

For this reason, when drilling in rock where the rock quality changes slightly, the drilling capacity of the drill becomes too much and the drilling frequency increases.
As a result, there were problems such as poor excavation, which reduced work efficiency, and early damage to the striking part due to idle running.

This invention was made to improve the above-mentioned conventional problems, and it is an object of the present invention to provide a method for adjusting the drilling capacity of a rock milling machine, which allows the drilling capacity to be adjusted according to rock quality.

(Means and effects for solving the problem) In order to achieve the above object, the present invention has a swing plate provided at the tip of a swing plate that swings horizontally between holes drilled in rock by a side drill. In a rock surface milling machine that drills holes with a line bit, the energy generation of the main drifter that strikes the swing plate and the side drifter that strikes the side drill can be set in multiple stages depending on the rock quality of the rock to be drilled. , If the rock quality changes during drilling and a blank line occurs, the drilling level is adjusted again.

As a result, even if the lithology of the rock subtly changes, it can be drilled with the drilling capacity that matches the rock quality, so there is no possibility of blank runs due to excessive or insufficient drilling capacity during drilling. Even if the rock quality changes during drilling and a blank line occurs, it can be dealt with simply by changing the drilling level.

(Embodiment) An embodiment of the present invention will be described in detail with reference to the drawings shown in FIGS. 1 to 8.

Figure 1 shows the rock surface grinding machine 1, with track-type suspension 2.
An upper revolving body 4 is rotatably provided on a lower traveling body 3 which can run freely, and a mass) 5a is provided at the front of this upper revolving body 4.
A guide cell 5 is attached so as to be vertically movable.

A feed table 6 is provided on the guide cell 5 so as to be movable back and forth, and a main drifter 8 and two side drifters 9 are installed on both sides of the feed table 6. plate 1
The rear end of 0.

Then, the rear end of the side drill 11 is struck by the side drifter 9.

The swing plate 10 is provided on the guide cell 5 along the guide cell 5, and its tip side is swung in the left-right direction by a swing motor 13 about one support shaft 12. A line bit 14 is attached to the tip of 10, and the line bit 14 is used to form a slit in the rock.

Further, the side drills 11 are provided on both sides of the swing plate 10 so as to be parallel to the swing plate 10, and are rotated by a low-take 9a. This method is used to drill holes in bedrock.

Water supplied from the water supply pipe 16 is ejected from the line bit 14 to discharge the sludge generated during slit formation, and from the drill bit 15 water is ejected from the water supply pipe 17.
Water and air supplied from the air supply pipe 18 are ejected to discharge the sludge generated during drilling.

On the other hand, FIG. 5 shows a hydraulic circuit for driving the main drifter 8 and side drifter 9 installed on the feed table.
22 is provided, and the hydraulic pressure discharged from each hydraulic pump 20 to 22 is controlled by an electromagnetic proportional flow control valve 23, 24, 25.
It is supplied to each drifter 8.9 via.

The 'gIWL proportional flow control valves 23 to 25 are connected to a controller 26. The controller 26 has a drilling mode selection switch 27 as shown in FIG.

A relay circuit 28 is connected to this drilling mode selection switch 27. The relay circuit 28 includes a setting volume group 29 for setting excavation conditions, and turns on the swing motor 13, side rotor 9a, etc.

A solenoid valve group 30 for off-control is connected, and when the drilling mode selection switch 27 selects the drilling mode according to the drilling conditions, the drilling conditions preset by the set polymer group 29 are changed via the amplifier 31. It is output to the electromagnetic proportional control valves 23 to 25, and the 'W1 magnetic valve group 30
The swing motor 13 and the like are controlled to be turned on and off.

Note that the switch position of the drilling mode selection switch 27, the electromagnetic proportional flow control valves 23 to 25 connected to the main drifter 8 and side drifter 9, and the swing motor 1
3 and the like are shown in Table 1 below.

In this Table-1, Ht and L of each drifter 8 and 9.

indicates the drilling level, and the drilling level is set in advance as shown in Table 2 below.

Hi indicates that the drilling level is set according to the rock to be drilled, and Lo indicates that the drilling level (■) is set.

On the other hand, the hydraulic circuits of the main drifter 8 and the side drifter 9 are each provided with an idle detector 33 consisting of a hydraulic pressure sensor, and the signals detected by these detectors 33 are sent to a peak holder circuit 33 provided in the controller 26. is sent to detect the peak value.

Table-1 Table-2 The peak value detected by the peak holder circuit 34 is A/
Post-performance processing device 3 A/D converted by D converter 35
6 for data processing, and the results are sent to D/
After being D/A converted by the A converter 37, the signal is output to a display 38 and an indicator light 39, so that the peak value and blank firing are displayed respectively.

Note that FIG. 8 shows the operation panel.

Next, a method for detecting an empty run of the rock milling machine 1 configured as described above will be explained. When drilling rock, first select "Drill Cutting" with the rock drilling mode selection switch 27 to start rock drilling, the solenoid valve group 30 is operated according to the operations shown in Table 1-1, and the preset volume is The drilling conditions for the drill mouth cut set in the group 29 are transmitted to the side drifter 9 via the amplifier 31.
is output to the electromagnetic proportional flow control valve 23.25 connected to the hole drilling level 23.25, and the drilling level is set to ■.

As a result, the side drifter 9 hits the side drill 11 at the drilling level (3) and starts drilling in the rock with the drill bit 15 attached to the tip, and at this time, the side rotator 9a rotates and the feed table 6 is fed. Speedy.

The drill bit 15 is set in a stable condition.
You will be able to perform kuchikiri by .

When the opening is finished, next is the rock drilling mode selection switch 2.
When 7 is put into drilling mode, 2 Side drifter 9
The impact force, the rotation speed of the side rotator 9a, and the feed speed of the feed table 6 all become Hi, and drilling into the rock begins.

By operating the drilling mode selection switch 27 according to the excavation situation, slit drilling by the line bit 14 and drilling conditions suitable for slit drilling are automatically set to perform rock drilling. When the drilling to a predetermined depth is completed, the line bit 14 and the drill bit 15 are pulled out from inside the drilling hole by selecting the extraction mode, so they are moved to the primary location and the above operation is repeated again. .

In the above, drilling is performed automatically based on the drilling conditions set in advance by the preset volume group 29, but two operators can adjust the drilling capacity according to the rock quality of the rock to be drilled. The adjustment method will be explained next.

That is, the controller 23 is previously provided with a dial-type main drifter impact pressure adjustment heir 40 and a side drifter impact pressure adjustment heir 41 as shown in FIG. operated these heirs 40.41 to determine the drilling level of each drifter 8.9 as shown in Table 2 above.
Set by.

For example, if the rock to be drilled is hard, set it to the "0" level, and for rock that is easy to collapse such as gravel, set it to "0" level.
■ Set the level to ".

As a result, the electromagnetic proportional flow control valves 23 to 25 connected to the main drifter 8 and side drifter 9 are controlled, and the swing plate 10 and side drill 11 are struck with a striking pressure according to the level, so that the swing plate 10 and the side drill 11 are struck according to the rock quality. In addition to making it possible to drill a hole, even if a blank stroke occurs during drilling, the main drifter impact pressure adjustment heir 40 and the side drifter impact pressure adjustment heir 41 are used to adjust so that the idle punch does not occur. Stable drilling without dry drilling becomes possible.

(Effects of the Invention) This invention is useful when the rock quality of the rock to be drilled changes slightly and cannot be handled by automatic drilling by switching the drilling mode.
By adjusting the energy generated by the main drifter and side drifter according to the rock type, the operator can drill holes in a stable state without dry drilling because the drilling capacity will not become too high or low depending on the rock type. becomes possible.

This makes it possible to eliminate problems such as poor drilling due to dry striking, which reduces work efficiency, and early damage to striking parts such as the swing plate.

In addition, by conducting test holes according to the rock quality and selecting the drilling level based on the results, it is easy to select the drilling level, and the rock quality changes during drilling and dry drilling is avoided. Even if this occurs, it can be easily dealt with by simply setting the drilling level again.

[BRIEF DESCRIPTION OF THE DRAWINGS] The drawings show an embodiment of the present invention, in which Fig. 1 is an overall side view of a rock milling machine, Fig. 2 is an enlarged plan view of a working machine part,
3 is a side view of the same, FIG. 4 is an enlarged plan view of the vicinity of the line bit, FIG. 5 is a circuit diagram of the drive system, and FIG. 6 is a block diagram of the control system. FIG. 7 is a circuit diagram of the dry striking prevention mechanism, FIG. 8 is a front view of the operation panel, and FIG. 9 is an explanatory diagram of a conventional rock surface milling machine. 8... Main drifter 9... Side drifter 1
0... Swing plate 11... Side drill 1
4...Line bit 15...-Drill bit patent applicant Komatsu Ltd. Representative (patent attorney) Osamu Matsuzawa (one idiot) Fig. 4 Courtroff 1 Fig.

Claims (1)

[Claims] In a rock milling machine that drills between holes drilled in rock by a side drill 11 using a line bit 15 provided at the tip of a swing plate 10 that swings horizontally, the rock quality of the rock to be drilled is determined. A main drifter 8 and a side drill 1 that hit the swing plate 10 according to the
A rock surface grinding machine characterized in that the energy generated by a side drifter 9 that strikes a rock can be set in multiple stages, and the drilling level is adjusted again when dry striking occurs due to changes in rock quality during drilling. Drilling capacity adjustment method.