JP2781612B2 - Split rock equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an improvement of a rock splitting device that, after drilling a rock in a tunnel excavation or the like, inserts the rock into the hole to generate a crack in the surrounding rock. .

(Prior art) In tunnel excavation, as a method of drilling hard rock, blasting is performed by forming a large number of drillings in the rock, setting dynamite in these holes and blasting the surrounding rock. The construction method is known.

However, since the vibration and noise caused by the blasting cause pollution, a power element has been proposed in recent years, which does not blast but inserts into the drilling hole and pushes the hole wall open to crack the surrounding rock. (JP-A-62-1017)
No. 97).

This is such that two thrust members having an arc-shaped cross section face each other in a substantially cylindrical shape and are supported by a wedge from the inside, and a rubber tube expanded by hydraulic pressure pushes the thrust member through the wedge. is there.

(Problems of the Invention) When excavating rock using this power element, it is desirable to crack the rock as deep as possible in the hole so that a large amount of rock can be broken at once. For that purpose, it is necessary to make the power element penetrate to the deepest position of each hole, but depending on the geological conditions, the perforation is not necessarily formed linearly and may be curved in the middle, and the power element may be bent deep into the hole. Sometimes it was difficult to insert. In some cases, it is difficult to insert the power element while holding it parallel to the hole, depending on the position where the hole is formed.

The present invention has been made in view of the above problems, and an object of the present invention is to facilitate the insertion of a power element into a hole and improve the efficiency of rock splitting.

(Means for Achieving the Object) The present invention provides two thrust members having an arc-shaped cross section which are arranged to face each other to form a substantially cylindrical shape, and a hollow portion formed inside these thrust members. A rubber tube disposed in the axial direction, two wedges arranged at symmetric positions in contact with the outer periphery of the rubber tube, and two ends each abutting against the thrust member from the inside, and a rubber tube for expanding the rubber tube. The rear end of the power element for split rock composed of the connected hydraulic pipe is supported by a cylindrical member having a bending portion that can be bent in an arbitrary direction, and the hydraulic pipe is inserted through the cylindrical member.

(Operation) When the power element supported by the cylindrical member is inserted into the hole formed in the rock and hydraulic oil is supplied inside the rubber tube, the wedge is driven laterally by the expanding rubber tube, and the thrust member is pushed. It spreads and causes cracks in the bedrock.

The cylindrical member bends as necessary to absorb bending of the hole and displacement in the insertion direction, facilitate penetration of the power element deep into the hole, and absorb the impact of breaking rock.

(Embodiment) FIGS. 1 to 4 show an embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes a power element, 2 denotes a cylindrical member that supports the power element 1, and 3 denotes a torque actuator as a rotating mechanism that drives the power element 1 to rotate.

As shown in FIG. 2, the power element 1 is provided with two thrust members 7 each having an arc-shaped outer peripheral portion so as to face each other in a substantially cylindrical shape, and a rubber portion is formed in a hollow portion formed inside the thrust member. The tube 8 and the wedge 9 are arranged in the axial direction. The wedge 9 is disposed at a symmetrical position in contact with the outer periphery of the rubber tube 8, and both ends abut against the thrust member 7 from inside, respectively. The two thrust members 7 are inserted into the cylindrical holder 10 at the base end and inside the holder 11 formed at the tip at the conical shape, and can be displaced outward by the holders 10 and 11 within a certain range. Is held.

The distal end of the rubber tube 8 is sealed, and the proximal end of the rubber tube 8 is connected to a hydraulic hose 12, which is a hydraulic pipe that penetrates through the holder 10 and the cylindrical member 2 and is guided from behind.

The cylindrical member 2 is supported on the base 5 via a support member 16. The base 5 is mounted on a guide rail 4 supported by a construction machine such as a wheel loader, and runs on the guide rail 4 by driving a chain 6.

The cylindrical member 2 is composed of a cylinder 2A having the same diameter as the holder 10 and a cylinder 2B having a larger diameter than the holder 10, and the base end of the holder 10 is provided inside the distal end of the cylinder 2A.
The proximal end of the cylinder 2A is fitted loosely inside the distal end of the cylinder 2B so that the base end of the cylinder 2B can be slightly bent in any direction inside the cylindrical holder 13 fixed to the support member 16. Combine. A wire rope 14 guided from the support member 16 through the inside of the cylindrical member 2 is locked to the holder 10.

The support member 16 is rotatably supported by the base 5 via a bearing 17, and is connected to a rotation shaft of the torque actuator 3 via a joint 22. The support member 16 is provided with a tensioner 18 for pulling the wire rope 14. The tensioner 18 urges a rod 19 having a wire rope 14 at the tip thereof rearward by a disc spring 20 interposed between the rod 19 and the support member 16. It is adjusted by rotating the tension adjusting nut 21 screwed to the rear end. By adjusting the spring load, the wire rope 14 has such a tension that the power element 1 and the cylindrical member 2 can be held in a straight line against their weight.

 Next, the operation will be described.

When the rock is hit, the guide rail 4 is moved to the front of the hole 26 formed after drilling the rock with a drill (not shown), and the base 5 is advanced by driving the chain 6 so that the power element 1 is moved to the position shown in FIG. As shown, it is inserted deep into the hole 26. The hole 26 formed by the drill may be slightly bent on the way due to geological conditions, etc., and depending on the drilling position, the guide rail 4 is held parallel to the hole 26 as shown in this figure. In some cases, refraction of the cylindrical member 2 is allowed at both the connecting portion and both ends of the cylinders 2A and 2B. 1 smoothly enters the hole 26 without being caught on the way.

Prior to the insertion of the power element 1, the torque actuator 3 is driven, and the rotational position of the power element 1 is adjusted so that the gap between the thrust members 7 matches the fragrance of a crack to be formed in the rock as shown in FIG. Adjust it.

Next, pressurized hydraulic oil is supplied to the rubber tube 8 via the hydraulic hose 12. As a result, the rubber tube 8 having the sealed end expands, and as shown in FIG. 3, the wedge 9 is bitten between the thrust members 7 on both sides, whereby the thrust member 7 is pushed out. As a result, a 180 ° reverse load is applied to the hole wall of the hole 26, and the thrust member 7
Due to the tensile stress generated inside the rock on the extension of the gap, cracks are generated in the rock around the deepest part of the hole 26 as shown in the figure.

Therefore, by inserting the power elements 1 one after another into the holes 26 formed at appropriate intervals, adjusting the rotational position of the power element 1, and performing this split rock work,
Since the cracks are continuously formed in the predetermined direction with the hole 26 as a center, the rock can be easily excavated from the cracks. Since the crack is formed in the vicinity of the deepest portion of the hole 26, a large amount of rock processing can be performed in one process.
At the moment when the rock breaks, an impact acts on the power element 1 in the transverse direction. On the other hand, the cylindrical member 2 and the joints before and after the cylinder element 2 are bent to allow the displacement of the power element 1, and the impact is applied. Since it absorbs, there is no possibility that an excessive load acts on the cylindrical member 2 and the support member 16 that support the power element 1.

Note that a link chain can be used instead of the wire rope 14 that holds the power element 1 and the cylindrical member 2.

(Effect of the Invention) As described above, in the present invention, the rear end of the power element to be inserted into the hole formed in the rock is supported by the slightly refractible cylindrical member.
Slight bends in the hole and displacement in the insertion direction are absorbed, so that the power element can be smoothly inserted deep into the hole and can absorb a lateral impact acting on the power element at the time of breaking rock.

Therefore, a large amount of rock can be formed at a time by using the rock breaking device, and the efficiency of rock excavation can be greatly improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a rock breaking device showing an embodiment of the present invention, FIGS. 2 and 3 are sectional views of a power element, and FIG. 4 is a side view of the working rock breaking device. 1 ... power element, 2 ... cylindrical member, 3 ... torque actuator, 4 ... guide rail, 5 ... base,
7 ... thrust member, 8 ... rubber tube, 9 ... wedge, 10, 11, 13 ... holder, 12 ... hydraulic hose, 14 ...
Wire rope, 16 ... Support member.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E21C 37/08

Claims (1)

(57) [Claims] An axially disposed two thrust members having arcuate cross sections disposed to face each other to form a substantially cylindrical shape, and a hollow portion formed inside these thrust members. A rubber tube, two wedges which are arranged at symmetrical positions in contact with the outer periphery of the rubber tube, and both ends of which contact the thrust member from the inside, and a hydraulic pipe connected to the rubber tube to expand the rubber tube. A rock breaking device, wherein a rear end of a power element for breaking rock is supported by a cylindrical member having a bending portion capable of bending in an arbitrary direction, and the hydraulic piping is inserted through the cylindrical member.