JPH09277249A - Method and apparatus for cutting rock bed - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that efficiency is bad and the expense is great because a rock bed is cut into a horizontal-U shape by a conventional wire saw by utilizing a cliff. SOLUTION: First and second lateral grooves C, F and a pair of longitudinal grooves D, E are formed to a flat rock bed at a predetermined position and the rock bed is cut along these grooves by a wire saw 60 for cutting processing according to conventional technique to form a quadrilateral and sieve supports 70, 80 having fixed pulleys 70a fixed to the lower ends thereof are inserted into the blind holes 71, 81 bored in the outside ends of the longitudinal grooves D, E and a wire saw 50 is arranged outside the receiving pulleys 70b, 70b of a pulley stand arranged in close vicinity to the supports and a wire 60 for cutting processing is endlessly trained over the drive sieve 51 of the wire saw 50 through the bottom of the first lateral groove C, the bottoms of a pair of longitudinal grooves D, E, the fixed pulleys 70a, 70a and the pulleys 70b, 70b of the pulley stand and moved to the outside in the direction shown by an arrow (f) by driving the wire saw 50 and the bottom surrounded by the first and second lateral grooves C, F and a pair of the longitudinal grooves D, E is cut to form a bottom groove G.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rock cutting method and a device for cutting rock in a quarry.

[0002]

2. Description of the Related Art The applicant of the present invention was previously filed on December 12, 1995.
I applied for Japanese Patent Application No. 7-352761 on the 29th day of the month. The present invention has the following configuration. Explaining with reference to FIG. 8, blind holes 11 and 21 are drilled by a boring machine substantially perpendicularly to both ends of the planned cutting line B on the rock. Then, the support columns 10 and 20 with pulleys as shown in FIG. 9 are inserted to the bottom of the holes, and the support column pull-out prevention device 12 is used as the support column 1 with pulleys.
Wires 12b are stretched from the upper ends of 0 and 20 to fixed anchors on the rock on three sides. Pulleys 13a and 13b are pivotally attached to the column with pulleys 10 and 20 near the lower end and the upper end, respectively, in a state of being orthogonal to each other. In the figure, reference numeral 60 is a cutting wire.

In FIG. 8, reference numeral 30 is a blind hole for cutting chips, and a blind hole 2 on an extension line in a direction in which a cutting wire 60 moves.
1 is provided to make it easy to cut rock by drilling to a predetermined depth near 1 and cutting scraps flowing in with water and pumping up with an underwater pump 31.
The water injection at the cutting site flows into the cutting groove of the cutting wire 60, passes through the groove from the blind hole 21, and passes through the blind hole 30 along with the cutting waste.
Flow into In the figure, 31a is a push-up hose.

However, there is no problem in construction without the blind hole 30 for cutting waste.

Reference numeral 51 is a drive pulley, which is pivotally attached to a prime mover traveling on a rail and is rotated by a prime mover. The prime mover is outwardly moved by a lever block or a change block hung on rock. Is pulled to apply tension to the cutting wire 60. The tension may be provided by a linear actuator such as a hydraulic cylinder.

In order to cut the rock mass with the rock mass cutting device as described above, the cutting wire 60 connected endlessly is used, and the loose side has the pulleys 13b and 13a above and below the one column 10 with pulleys. After the pulley-equipped strut 10 is inserted into one blind hole 11 from above while the cutting wire 60 is laid over, the strut extraction preventing device 12 is set. Next, the cutting wire 60 that has emerged from the blind hole 11 is arranged on the planned cutting line B, and the other supporting side 2 with pulleys is provided.
After inserting the cutting wire 60 through the lower sheave 13a and the upper sheave 13b of 0, into the blind hole 21 as before, set the strut extraction preventing device 12, and then,
Hand over to the drive pulley 51.

If there is a blind hole 30 for inserting the submersible pump 31, the submersible pump 31 is inserted into the blind hole 30 for operation.

Then, the driving wheel is pulled outward by a lever block or the like to apply tension to the cutting wire 60, and in this state, the drive pulley 51 is moved so that the cutting wire 60 moves in the direction of the arrow in FIG. When rotated, the rock mass on the planned cutting line B is cut downward.

[0009]

However, according to the conventional technique, as shown in FIG. 10, a hole formed by piercing the rock in which one end is a steep cliff has its tips penetrating in the horizontal and vertical directions. 1a and 2a are drilled, a cutting wire 60 is passed through this, and the wire is continuously pulled in the direction of arrow a to obtain 2
The planned cutting line b between the holes of 2a and 2b after cutting the grooves 3a and 3b indicated by the dotted line is cut downward to form the groove A, whereby the three surfaces of the grooves 3a, A and 3b are formed. The enclosed rock was quarried from the cliff side by blasting and other means.

However, it is necessary to remove a large amount of unnecessary earth and sand from the side of the mountain before the cliff as shown in FIG. 10 is made. Even if the cliff is made, the quality of the rocks in the vicinity is poor, There is a drawback that it takes a considerable cost to remove them.

The present invention has been made in view of the above-mentioned circumstances, and it is possible to cut a block of rock having a quadrilateral periphery including a bottom anywhere on a flat bedrock without forming a cliff. A cutting method and an apparatus therefor are provided.

[0012]

A rock cutting method of the present invention for solving the above-mentioned problems comprises the following steps. (1) A first planned horizontal cutting line of a predetermined length is provided at a predetermined position on the bedrock, and a pair of vertical cutting lines of a predetermined length are provided from both ends of the pair at substantially right angles to the first planned horizontal cutting line. Having both ends in the middle of the planned line, a second planned horizontal cutting line is provided which is substantially parallel to the first planned cutting line and is separated by a predetermined distance, and both ends of the first and second planned horizontal cutting lines. Also, a blind hole having a predetermined depth is drilled at the tips of the pair of vertical cutting lines, respectively, and the first and second horizontal cutting lines and the rock mass of the pair of vertical cutting lines of the wire saw. Cutting downward to near the bottom of the blind hole with a cutting wire to form first and second lateral grooves and a pair of vertical grooves, (2) near the blind hole at the tip of the pair of vertical grooves, Step of drilling the blind holes for the guide roller props by biting slightly from the state inscribed in the vertical groove, (3) Stand The pulley block with the shaft of the receiving pulley laterally attached to it is fixed to the blind holes at the ends of the pair of vertical grooves by anchors, respectively, and on the extension of the middle line of the pair of vertical grooves. Step of laying a rail outward and placing a wire saw, (4) cutting wire from the bottom of the first lateral groove to the vicinity of the blind hole at the tip along the bottom of the pair of vertical grooves. Step of pushing and simultaneously inserting the guide roller support into the blind hole to circumscribe the cutting wire on the outer periphery of the guide roller. (5) Insert the sheave support into the blind holes at the ends of the pair of vertical grooves and pivotally attach to the lower end. The wire for cutting is raised along the blind hole through the fixed pulley, and is endlessly wound around the drive pulley of the wire saw through the pulley for receiving the pulley allowance. Step of retaining, before (6) While rotating the drive pulley in one direction, the wire saw is moved outward along the rail, and the bottom between the pair of vertical grooves is cut to the second lateral groove along the bottom of the first lateral groove. Step of forming a bottom groove.

Further, instead of the pulley base, the cutting wire may be endlessly wound around the drive pulley of the wire saw through a free pulley provided at the upper end of the sheave column.

In the rock cutting device of the present invention, a fixed pulley is pivotally attached to the lower end of the hollow pipe, and a sheave strut is secured to the blind holes at the ends of the pair of vertical grooves by a pullout preventing device. A guide roller that is rotatable around its axis is attached to the lower end of the hollow tube, and is inserted into the blind hole for the guide roller strut in proximity to the inserted guide roller strut and the blind hole at the tip of the pair of vertical grooves. The bases are fixed to the ground by anchors, and the pulley is laid outward on the extension of the middle line between the pair of vertical grooves and the pulley base on which the shaft of the receiving pulley is laterally mounted. Tie the bottom of the pair of vertical grooves and the bottom of the first lateral groove through the wire saw that moves outward on the rail under tension, the drive wheel of the wire saw, and the receiving pulley and the fixed pulley of the sheave strut. With cutting wire connected endlessly It is.

Further, instead of the pulley base, a free pulley that rotates around an axis at the upper end of the sheave column is disposed, and the cutting wire is endlessly wound around the drive wheel of the wire saw through the free pulley. ing.

The guide roller has a cylindrical outer circumference covered with urethane rubber.

Further, in the extracting device, a flange is provided in the middle of a cylinder having a hole to be inserted into the upper end of the sheave strut, and a bolt is tightened through the sheave strut at the upper part of the cylinder to secure both ends of the flange. Is anchored to the bedrock by anchors.

Furthermore, the hollow pipes of the sheave strut and the guide roller strut are joined together at a predetermined length and are prevented from coming off by bolts and nuts penetrating therethrough.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 shows an embodiment of the present invention, and is a perspective view for explaining the method and apparatus, FIG. 2 shows an embodiment of the present invention, which is a plan view for explaining the method and apparatus, and FIG. 3 is according to the present invention. FIG. 4 is a view for explaining the state of quarry after cutting, FIG. 4 is a cross section taken along the line AA of FIG. 2, FIG. 5 is a view in which a sheave strut of FIG. 4 is provided with a free pulley, and FIG. 6 is a blind hole at the tip of the vertical groove. FIG. 7 is a plan view and a cross-sectional view of the vicinity, and FIG. 7 is an explanatory view of a pipe joint of a sheave strut and a guide roller strut of the present invention.

The present invention provides the transverse grooves C and F and the pair of longitudinal grooves D and E shown in FIG. 1 by the method and apparatus shown in FIG. Bottom groove G
Is to cut. Blind holes 11 and 21 cut the lateral groove C, and are drilled substantially vertically to both ends of the first planned horizontal cutting line B by a boring machine. And the first planned horizontal cutting line B
The rock bed is cut downward by the wire saw cutting wire 60 to a predetermined depth (hole bottom) to form the first lateral groove C. Reference numerals 11a and 21a denote blind holes for cutting the second lateral groove F, and second lateral cuts that are substantially parallel to the first planned horizontal cut line B on the pair of planned vertical cut lines d and e and are separated by a predetermined distance. Holes are drilled substantially perpendicularly to both ends of the planned line b, and the rock of the second planned horizontal cutting line b is cut downward by the cutting wire 60 to a predetermined depth (hole bottom) to form the second lateral groove F. Form. The pair of planned vertical cutting lines d and e extend from the blind holes 11 and 21 at a substantially right angle to the first planned horizontal cutting line B, and blind holes 71 and 81 are drilled at the tips thereof, respectively. The rocks d and e are cut downward by a cutting wire to a predetermined depth (hole bottom) to form vertical grooves D and E.

Next, blind holes 71 and 81 at the tips of the vertical grooves D and E.
A little bit from the state of being inscribed in the vertical grooves D and E in the vicinity of, and blind holes 111 and 121 for the guide roller support columns are drilled.

In the blind holes 11 and 21, the portions 11b and 21b shown in FIG. 2 are blind holes for pumping up the cutting waste generated when the vertical groove D and the first lateral groove C are cut downward together with water. The blind hole excluding this has a structure in which the blind holes 11a and 71 are combined vertically and horizontally. The blind holes 11a and 71 are
Holes of about 150 mm overlap each other in the state where some of them overlap each other, and three blind holes are drilled to make a long hole. With a crawler type boring machine, about 150 mm of holes are the limit. By such drilling, a blind hole is formed at the lower end of the sheave column into which the fixed pulley is inserted. Then, after drilling the first hole at the end, the second and third adjacent holes are drilled using the first and second holes as guides so that the holes do not escape.

In FIG. 2, the first transverse groove C is cut as shown in FIG. 8 by inserting a stationary pulley of a sheave strut (not shown) into the laterally elongated holes of the blind holes 11 and 21, and the longitudinal groove D is blind. The sheave support fixed pulleys (not shown) are inserted into the vertically elongated holes of the hole 11 and the blind holes 71, respectively, and are cut, and the vertical grooves E are shown in the vertically elongated holes of the blind hole 21 and the blind hole 81, respectively. Do not insert the sheave stanchion fixed pulley to cut. In the figure, 81b is a blind hole 81 for pumping up cutting waste.

Blind holes 11a and 21a into which the sheave struts are inserted at the time of cutting the second lateral groove F are provided with blind holes 21C for pumping cutting waste together with water at the time of cutting. As shown in FIGS. 2 and 4, reference numeral 90 denotes a pulley base in a state of being close to the blind holes 71 and 81 at the tips of the pair of vertical grooves D and E.
Each of them is fixed on the bedrock by an anchor 90a. Then, a receiving pulley 70 in which a shaft 91 is horizontally mounted on the pulley base 90
b is attached. However, as shown in FIG. 5, instead of the pulley base 90, the shaft 7 is attached to the upper ends of the sheave columns 70 and 80.
Free pulley 7 that is provided with 3 and moves around to change direction
4 may be used. Reference numeral 50 denotes a wire saw, so that the drive pulley 51 contacts the extension line of the vertical groove D and the extension line passing through the pulley base 90 disposed at a predetermined angle with the vertical groove E at a position close to the blind hole 81. The rail 52 is arranged so as to move outward on the rail 52 laid parallel to the vertical groove D as indicated by an arrow f. When the wire saw 50 is arranged in the solid line of FIG. 2, the guide roller 52a is mounted on the pedestal on which the rails 52 are laid (it is difficult to fix the rails directly on the bedrock, so the rails are mounted on a steel frame (not shown)). Fixed,
Place the frame on the bedrock).

However, as shown by the chain double-dashed line, the rail 52 may be extended on the surface between the pair of vertical grooves D and E.
In this case, the rail 52 does not have to be parallel to the vertical groove D or E. In the case of a two-dot chain line, the guide rollers 52a are attached to both sides of the pedestal. When the free pulley 74 shown in FIG. 5 is used, the guide roller 52a is unnecessary.

Next, as shown in FIG. 1, the cutting wire 60 is formed from the bottom of the first lateral groove C along the bottoms of the pair of vertical grooves D and E to the guide roller support columns 110 and 120 through the blind hole 11.
1, and the cutting wire 60 is circumscribed on the outer circumference of the guide rollers 112, 112.

Next, a blind hole 71 at the tip of the pair of vertical grooves D, E,
The sheave struts 70, 80 are inserted into 81, the cutting wire 60 is raised along the blind holes 71, 81 via the fixed pulleys 70a, 70a pivotally attached to the lower end, and the receiving pulley 70b of the pulley base 90 or It is endlessly wound around the drive pulley 51 of the wire saw via the free pulley 74 and is prevented from being pulled out by the pullout prevention device 95 shown in FIG.

The pull-out prevention device 95 is provided with flanges 95b protruding on both sides in the middle of the cylinder 95a.
The structure is such that it is externally inserted onto the upper ends of the sheave struts 70, 80, and the upper portion of the cylinder 95a penetrates the hollow pipe 14 of the sheave struts 70, 80 and is tightened with bolts 95c. The flange 95b is fixed to the bedrock by an anchor 90a. It

As shown in FIG. 7, sheave struts 70, 80.
The hollow tubes 14 of the guide roller support columns 110 and 120 are joined together by a stamped joint 14b at a predetermined length (about 2 m), and are tightened with penetrating bolts and nuts 14a to prevent them from being pulled out.

As shown in FIG. 1, the cutting wire 6 is used.
0 passes through the bottoms of the first horizontal groove C and the vertical grooves D and E, and blind holes 71 and 8
1 is raised up endlessly by the drive sheave 50 and then the wire saw 50 is driven to rotate the drive pulley 51 in the direction of the arrow while the wire saw 50 is moved along the rail 52 to the outside indicated by the arrow f. And is cut along the bottom of the first lateral groove C to the second lateral groove F between the pair of vertical grooves D and E. At this time, if there is spring water in the middle of the cutting wire 60, it is cut as it is, but if there is no spring water, cutting water is caused to flow in the middle, and cutting waste is pumped together with water from the blind hole 81b (FIG. 2).

Through the above steps, the lateral grooves C, F, the vertical grooves D,
A square pillar block of rock whose four side surfaces are formed by E and whose bottom surface is formed by the bottom groove G is cut out from the bedrock.
The quadrangular prism may have the four sides at right angles to each other, but in order to facilitate quarrying, the vertical groove E is cut at a slight angle at a right angle or more to the horizontal groove C as shown in FIGS. The rock block is divided as shown by a chain double-dashed line in FIG. 3, lifted by a heavy machine such as a tow truck or a backhoe (HE), and carried out. That is, it is divided into several parts in the horizontal direction (three parts in the figure), blasted 101a along the horizontal line 100, and blasted 101b the triangular portion 102a at the right end of the substantially rectangular block 102 of the horizontally elongated rock formed by this blasting 101a. Then, the blasting 101c is performed vertically, the small block 102b is cut off, and the small block 102b is hung up by a heavy machine.

When the rock block of the quadrangular prism is removed as described above, a hole with a predetermined depth is formed in the quadrangular prism on the upper surface thereof. Since four sides of a rock cliff are formed around this hole, it is possible to continue quarrying in all directions using each of these four sides.

[0033]

According to the method and apparatus of the present invention described in detail above, the following effects are exhibited. (1) Unlike the conventional method, it is not necessary to remove a large amount of unnecessary earth and sand from the side surface of a mountain to form a cliff, and it is possible to quarry from a desired location simply by removing the topsoil, so the quarrying cost is reduced.

(2) When quarrying from the cliff side as in the prior art, some stones of poor quality will appear, but according to the present invention, only good quality stones can be harvested.

(3) When a quadratic prism is first cut and the rock is quarried, quarrying can be performed from four vertical planes in the hole, so that the efficiency of quarrying is improved.

[Brief description of drawings]

FIG. 1 is a perspective view illustrating a method and an apparatus according to an embodiment of the present invention.

FIG. 2 is a plan view showing an embodiment of the present invention and explaining a method and an apparatus.

FIG. 3 is a diagram illustrating a state of quarry after cutting according to the present invention.

FIG. 4 is a sectional view taken along line AA of FIG. 2;

5 is a view in which a free pulley is provided on an upper end of the sheave column of FIG.

FIG. 6 is a view in the vicinity of a blind hole at the tip of a vertical groove, in which (a) shows a plane and (b) shows a cross section.

FIG. 7 is an explanatory view of a pipe joint used in the sheave strut and the guide roller strut of the present invention.

FIG. 8 is a perspective view in the case of cutting a horizontal groove or a vertical groove in the conventional vertical direction.

FIG. 9 is an explanatory view of a conventional sheave strut.

FIG. 10 is an explanatory diagram of conventional rock cutting using a cliff.

[Explanation of symbols]

 B First planned cutting line b Second planned cutting line d, e Vertical planned cutting line C First lateral groove D, E Vertical groove G Bottom groove 11, 21, 11a, 21a, 71, 81 Blind hole 14 Hollow Pipe 14a Bolts, nuts 14b Inro joint 50 Wire saw 51 Drive pulley 52 Rail 60 Wire for cutting 70,80 Sheave strut 70a Fixed pulley 70b Receiving pulley 73 Shaft 74 Flexible pulley 90 Pulley base 91 Shaft 90a Anchor 95 Lockout prevention device 95a Tube 95b Flange 95c Bolt 110,120 Guide roller support 111,121 Guide roller support blind hole 112 Guide roller

Claims (7)

[Claims] 1. A method for cutting rock mass, which comprises the following steps. (1) A first planned horizontal cutting line of a predetermined length is provided at a predetermined position on the bedrock, and a pair of vertical cutting lines of a predetermined length are provided from both ends of the pair at substantially right angles to the first planned horizontal cutting line. Having both ends in the middle of the planned line, a second planned horizontal cutting line is provided which is substantially parallel to the first planned cutting line and is separated by a predetermined distance, and both ends of the first and second planned horizontal cutting lines. Also, a blind hole having a predetermined depth is drilled at the tips of the pair of vertical cutting lines, respectively, and the first and second horizontal cutting lines and the rock mass of the pair of vertical cutting lines of the wire saw. Cutting downward to near the bottom of the blind hole with a cutting wire to form first and second lateral grooves and a pair of vertical grooves, (2) near the blind hole at the tip of the pair of vertical grooves, Step of drilling the blind holes for the guide roller props by biting slightly from the state inscribed in the vertical groove, (3) rack A pulley base on which the shaft of the receiving pulley is laterally mounted is fixed by an anchor at a position close to the blind holes at the ends of the pair of vertical grooves, and the middle line of the pair of vertical grooves is extended. Laying a rail outwards and placing a wire saw on it, (4) Cutting wire along the bottom of the pair of vertical grooves from the bottom of the first lateral groove near the blind hole at the tip. Pushing the guide roller into the blind hole at the same time, and circumscribing the cutting wire to the outer circumference of the guide roller by inserting the guide roller pillar into the blind hole. (5) Insert the sheave pillar into the blind hole at the tip of the pair of vertical grooves, The wire for cutting is raised along the blind hole through the fixed pulley attached, and is endlessly wound around the drive pulley of the wire saw through the receiving pulley of the pulley allowance, and then the sheave strut is prevented from being pulled out. Process to prevent it from being removed by (6) While rotating the drive pulley in one direction, the wire saw is moved outward along the rail, and the bottom between the pair of vertical grooves is cut along the bottom of the first lateral groove to the second lateral groove. Forming a bottom groove. 2. The cutting wire is endlessly wound around a drive pulley of a wire saw through a free pulley provided at an upper end of the sheave column instead of the pulley base. Method of cutting rock mass. 3. A sheave strut in which a fixed pulley is pivotally attached to the lower end of the hollow pipe, and which is retained in a blind hole at the tip of a pair of vertical grooves by an extraction preventing device, and a hollow sheave strut at the lower end of the hollow pipe. A guide roller that is rotatable around is attached to the blind hole for the guide roller column, and the pedestal is anchored on the ground in proximity to the inserted guide roller column and the blind holes at the ends of the pair of vertical grooves. Tension is applied outwardly on each of the pulleys, which are fixed and on which the shaft of the receiving pulley is laterally mounted, and on the rails laid outward on the extension of the line between the pair of vertical grooves. A wire saw that moves by being moved, a drive wheel of the wire saw, a receiving pulley and a fixed pulley of the sheave strut, and a cutting wire that connects the bottoms of the pair of vertical grooves and the bottoms of the first lateral grooves endlessly. Of bedrock characterized by having Cross-sectional devices. 4. A free pulley that rotates around an axis at the upper end of the sheave column is provided instead of the pulley stand, and the cutting wire is endlessly wound around a drive wheel of a wire saw through the free pulley. The rock cutting device according to claim 3, wherein: 5. The rock cutting device according to claim 3, wherein the guide roller has a cylindrical outer circumference covered with urethane rubber. 6. A flange is provided in the middle of a tube having a hole to be inserted at an upper end of a sheave strut in the extracting device.
The rock cutting device according to claim 3, 4 or 5, wherein a bolt is fastened to an upper portion of the cylinder so as to penetrate a sheave strut, and both ends of the flange are fixed to the rock by anchors. 7. The hollow tubes of the sheave strut and the guide roller strut are spliced together at a predetermined length and are prevented from coming off by bolts and nuts penetrating therethrough. , 4, 5 or 6 rock cutting device.