JP2010065398A - Rock splitting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance rock splitting efficiency by abbreviating a preparation step during the operation of inserting a rock splitting implement into a hole and splitting the rock after the hole is drilled by a drilling unit, so as to enable the performance of continuous operations. <P>SOLUTION: The drilling unit 1 is installed on the front of a cutting face; a bit 14 attached to a shank rod 13 with a taper 15 widened toward a leading end makes the cutting face drilled to form the hole, while advancing the drilling unit 1; and the rock splitting implement is inserted into the drilled hole. The drilling unit recedes while a rock splitting implement retainer 3 inhibits the rock splitting implement from coming off from the drilled hole; the diameter of the rock splitting implement 4 is enlarged by the taper of the shank rod 13; and a crack appears in bedrock. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a split rock device that drills rock, rocks, concrete, or the like with a drilling device, inserts an arrow into the drill, expands the diameter, and generates a crack in the rock.

As a method for excavating a hard rock mass, a blasting method is known in which a plurality of holes are drilled in the rock mass, dynamite is loaded into these holes to explode, and the rock mass is crushed.
The blasting method was accompanied by scattering of crushed rocks accompanying the explosion of dynamite, as well as vibration and noise. At the time of blasting, the workers had to evacuate and interrupt the work, resulting in low work efficiency. Therefore, there has been proposed a split rock device that uses a static pressure into a drill hole formed in the rock mass without using dynamite and expands it by pushing a seri arrow to generate a crack in the rock mass.
A serrated arrow causes two rocks to be cracked by expanding a thrust member by facing two thrust members each having a tapered circular taper on the inner surface and pushing a wedge into the tapered portion with hydraulic pressure or the like.

When using a serrated arrow to crack the rock mass, as shown in FIG. 5, drilling the rock mass using a drilling device 1 such as a hammer drill, extracting the drill bit 14 from the hole, and operating the serrated arrow 4 The hydraulic device 3 is fixed to the guide frame 5 of the excavator, and the wedge 40 is pushed by the hydraulic device 3 to expand the diameter of the serrated arrow 4 to cause cracks in the rock.
Japanese Patent No. 2781612 Japanese Patent No. 2876100

When using a serrated arrow to crack the bedrock, the drill bit is removed from the drill during the drilling process and the process of pushing the serrated arrow into the drill, and then the bit is removed from the rod and the serrated arrow is expanded. Since the hydraulic device for this purpose must be installed in the guide frame of the excavator and it takes time to move from the drilling process to the split rock process, the work efficiency is low.
Therefore, the present invention is intended to improve the efficiency of the split rock by omitting the insertion process of the arrow into the drilling after completion of the drilling and the preparatory process between the split rock work, so that the work can be performed continuously.

  A drill arrow on the drill rod of the drilling device is coaxially provided so that it can move in the axial direction of the drill rod, a screw arrow holding device is provided on the drill rod, and a shank rod with a taper that expands at the tip of the drill rod is attached. In addition, since the bit is fixed to the tip of the shank rod, a slit arrow is inserted into the drilling at the same time as the drilling process or without pulling the bit out of the drilling, and the efficiency of split rock is improved.

  At the same time as drilling with the drilling device, the arrow can be inserted into the drilling, and the arrow is removed by a series of steps of retracting the shank rod with the taber while preventing the arrow from coming out of the drilling by the button holding device. Since the diameter can be increased, cracks can be efficiently generated in the rock mass, and the split rock work can be performed in a short time.

FIG. 1 shows the whole of the rock breaking device, and a drill rod 12 is connected to a drive unit 10 of the excavating device 1 via a swivel (not shown). A shank rod 13 having a bit 14 attached to the end thereof is connected to the tip of the drill rod 12, and a tapered taper 15 is formed on the shank rod 13.
The drill rod 12 is covered with a thread arrow 4 and is provided coaxially. A drill rod is passed through the hollow portion of the serrated arrow 4, and the serrated arrow 4 is movable in the axial direction of the drill rod 12. On the base side of the serrated arrow 4, the serrated arrow holding device 3 is provided. The line arrow pressing device 3 is for holding the line arrow 4 so that the line arrow 4 inserted into the hole formed by the bit does not come out of the hole during the diameter expanding operation.
The serrated arrow holding device 3 includes a stopper 2 that is formed with a hole for allowing the drill rod 12 to pass therethrough and allows rotation and vibration of the drill rod 12 and a center hole jack 31 that is fixed to the stopper.

FIG. 2 shows a case in which the center hole jack of the arrowhead pressing device 3 is replaced with a standard jack, and two standard jacks 31 are arranged symmetrically on a holder 20 having a hole through which the drill rod 12 is passed. A jack receiver 21 is provided on the piston 30 side of the jack 31 and is provided with a hole through which the drill rod 12 passes in the center. The jacks 31 and 31 are synchronized so as to push the jack receiver 21 forward. It has become. The drive rod 12 is inserted through the holes of the holder 20 and the jack receiver 21, and can perform a drilling operation by rotating and vibrating without being obstructed by the jack 31.
A pressing tool 32 is provided in front of the jack receptacle 21, and the piston 30 extends to press the pressing tool 31, and the pressing tool 32 hits an end of the serration arrow 4 to transmit the pressing force of the piston 30 to the serration arrow 4. .

  The shank rod 13 is formed with a taper 15 that expands forward. As shown in FIG. 3, the serrated arrow 4 is a divided cylindrical member, the inner surface of which is a taper surface that expands forward, and a ring made of a rubber plate in a groove 41 formed on the outer peripheral surface to maintain the cylindrical shape. 42 is fitted to hold the cylindrical shape. A pressing tool 32 connected to the piston 30 abuts on the base side of the serrated arrow 4, and the pressing force of the jack is transmitted to the serrated arrow 4. FIG. 3 (1) shows a state in which the piston 30 of the jack 31 of the serrated arrow holding device is contracted and is in the cylinder, and FIG. 3 (2) shows an expanded state of the piston, and the serrated arrow 4 is pushed forward. The state which moved to the front of the shank 13 is shown.

  As shown in FIG. 4, the procedure of the split rock using the split rock device of the present invention is as follows: (1) The excavator 1 is installed on the front face of the face, the drive unit 10 mounted on the guide frame 5 is advanced, and the bit 14 is moved. Move close to the face. (2) The face is drilled by the bit 14 attached to the shank rod 13 having the forward taper 15 to form a hole, and the slit 4 is inserted into the drill.

(3) Since the diameter direction of the claw arrow and the direction in which the crack C is generated are generated in a direction perpendicular to the diameter expansion direction of the claw arrow 4 as shown in FIG. The boring rod 12 is gently rotated to adjust the direction perpendicular to the planned direction of generating a crack.
The drive unit 10 is retracted while the piston 30 of the jack 31 of the button 3 is extended to prevent the button 4 from coming out of the hole. The serrated arrow 4 is expanded by the 13 taper 15 of the shank rod to cause a crack in the planned direction.
The operation of the jack 31 is stopped, the bit 14 is extracted from the drilling hole, and the next drilling and split rock work is repeated to collapse the entire face.

  In the split rock process shown in FIG. 4, the seri arrow 4 is inserted into the drilling hole simultaneously with the drilling, but the seri arrow 4 may be inserted into the drilling hole after the drilling is completed.

  As described above, drilling and split rock can be performed as a series of processes, so that the rock can be efficiently cracked, and tunnel construction and the like can be performed efficiently.

The front view of the split rock apparatus of this invention. The front view of the other Example of the split rock apparatus of this invention. The detailed front view of Seri-ya. Process drawing of drilling / slit rock using the split rock device of the present invention. Explanatory drawing of the diameter expansion direction and crack production | generation direction of an arrow. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drilling device 10 Drill drive part 12 Drill rod 13 Shank rod 14 Bit
2 Stopper
3 Seri arrow holding device 30 Piston 31 Jack 4 Seri arrow

Claims (5)

A drill arrow on the drill rod of the drilling device is coaxially provided so that it can move in the axial direction of the drill rod, a screw arrow holding device is provided on the drill rod, and a shank rod with a taper that expands at the tip of the drill rod is attached. There is a split rock device with a bit fixed to the tip of the shank rod. The split rock device according to claim 1, wherein the arrowhead pressing device is a jack. A method of splitting rocks using the split rock device according to claim 1 or 2, wherein a slit arrow is inserted into a hole formed by drilling a slit arrow with a drilling device, and the slit arrow is pressed by a slit arrow holding device. A cracking method that generates cracks by retracting the shank rod and expanding the diameter of the arrow while preventing the movement of the crack. A method of splitting rocks using the split rock device according to claim 1 or 2, wherein a slit arrow is inserted into the hole at the same time as drilling by the drilling device, and the arrow arrow movement device is used to prevent the arrow arrow from moving. A split rock method that retreats the shank rod and expands the diameter of the arrow to generate a crack. The split rock method according to claim 3 or 4, wherein the direction of diameter expansion of the arrow is perpendicular to the direction in which the crack is generated.

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