JP2020063583A - Rock bed drilling device for vertical shaft - Google Patents

Abstract

To provide a rock bed drilling device for a vertical shaft, capable of drilling a plurality of holes in the rock bed at the bottom of the vertical shaft without performing re-installation work.SOLUTION: A rock bed drilling device 100 used in a vertical shaft includes a drifter 10, a guide cell 20, a slide rail 30, a pedestal 40, and a lifting rail 50. The drifter 10 is provided with a rod 12 having bits 11 at its tip, and rotates the rod 12. The guide cell 20 supports the drifter 10 so as to be able to advance and retreat in a vertical direction with the bits 11 facing to a rock bed G1 at a bottom of the vertical shaft. The slide rail 30 supports the guide cell 20 so as to be slidable in a horizontal direction. The gantry 40 is located above the rock bed G1 at the bottom of the shaft, and supports the sliding rail 30. The elevating rail 50 is a rail for lifting a device main body 80 (10, 20, 30, 40) in the vertical direction, and extends in the vertical direction along an inner wall surface 1b of the vertical shaft 1 to be fixed to the inner wall surface 1b.SELECTED DRAWING: Figure 1

Description

  TECHNICAL FIELD The present invention relates to a rock drilling device for a shaft, which is capable of drilling a plurality of holes vertically in a rock bottom of a shaft.

  As a method of constructing a shaft in a rock mass, a plurality of holes were drilled in the rock mass using a hole drilling device, and for example, explosives were loaded into the holes to explode and crush the rock mass. A method of constructing a vertical shaft by discharging the shear to the outside of the vertical shaft and lining the hole wall is known.

  As a drilling device used in this type of shaft construction method, for example, the drilling device disclosed in Patent Document 1 is known. The drilling device disclosed in Patent Document 1 is a device for drilling a plurality of holes in the rock bottom rock mass of a shaft, and is a cradle that is placed on the rock mass and supports the entire device, and is supported by the cradle and runs along a horizontal plane. On the swivel table, which is supported by the swivel table and moves in the horizontal direction, a holder which is supported by the boom and rotates along a vertical plane, a guide cell which moves up and down along the holder, and a guide cell. And a drifter for drilling, which moves up and down along. This drilling device operates a turning table, a boom, etc. to move the drifter to a drilling position on the rock bottom of the shaft, and then operates the drifter to lower the drifter along the guide cell. By drilling and repeating this, multiple holes are drilled in the rock bottom rock.

JP-A-8-86186

  However, the hole drilling device disclosed in Patent Document 1 is suspended from the ground by a crane and arranged on the hole bottom rock mass of the shaft. Therefore, when using this drilling device when constructing a vertical shaft, the drilling device is hoisted by a crane before the blasting work to charge (load) the drilled hole with explosive and explode and crush the rock mass. In order to continue drilling, it is necessary to hang the drilling device again from the ground with a crane and place it on the rock bottom rock, and this re-installation work takes time and cost. Further, the drilling device is not limited to the drilling device disclosed in Patent Document 1, and a plurality of holes may be drilled in the rock using a well-known crawler-type drill machine having drifters at the tips of the booms. In this case as well, it is necessary to similarly lift and hang the drill machine between the ground and the bottom of the hole and reinstall it each time.

  The present invention has been made by paying attention to such an actual situation, and a rock drilling device for a vertical shaft capable of continuously drilling a plurality of holes in a hole bottom rock without performing a re-installation work of the device. The purpose is to provide.

  For the above-mentioned problem, the rock drilling device for a shaft according to the present invention, as one aspect thereof, in a rock drilling device for a shaft capable of vertically drilling a plurality of holes in a rock bottom of a shaft, a drifter and , A guide cell, a slide rail, a mount, and a lifting rail. The drifter includes a rod having a bit at its tip and rotates the rod. The guide cell supports the drifter so as to be able to advance and retreat in the vertical direction with the bit facing the hole bottom rock mass. The slide rail supports the guide cell so as to be slidable in the horizontal direction. The gantry is located above the borehole rock and supports the slide rail. The elevating rail is an elevating rail for vertically elevating the apparatus main body including the drifter, the guide cell, the sliding rail, and the gantry, and is vertically arranged along the inner wall surface of the vertical shaft. It is stretched and fixed to the inner wall surface.

  According to the above aspect of the rock drilling device for a shaft according to the present invention, in the rock drilling device for a shaft capable of vertically drilling a plurality of holes in the rock-bottom rock of the shaft, the bit is directed to the rock-bottom rock. The guide cell that supports the lifter so that it can move forward and backward in the vertical direction, since it has a slide rail that supports the slide movement in the horizontal direction, while moving the guide cell along the slide rail, By repeating the operation of lowering along the guide cell while operating the drifter, the plurality of holes can be easily drilled in the rock bottom rock. Further, the rock drilling device for vertical shafts is a lifting rail for vertically moving the device main body including the drifter, the guide cell, the slide rail, and the mount supporting the slide rail. Since the vertical rail extends along the inner wall surface of the shaft and is fixed to the inner wall surface, the vertical bottom rock is drilled in the plurality of holes, The device body can be retracted by raising the device body along the use rail. Therefore, for example, after the explosive is loaded into the drilled hole, the device main body is raised along the elevating rail, and the hole bottom rock is simply cured by a curing mat etc. It is possible to explode and crush the above-ground rock bed without performing lifting work from above to the ground. Then, after that, by lowering the device main body along the lifting rail, it is possible to continue the drilling of a plurality of holes in the hole bottom rock without performing a work of hanging from the ground to the hole bottom by a crane or the like. You can do it.

  In this way, it is possible to provide a rock drilling device for a vertical shaft capable of continuously drilling a plurality of holes in the rock bottom without re-installing the device.

It is a top view of the rock drilling device for vertical shafts which concerns on 1st Embodiment of this invention. It is a partial expanded sectional view of the rock drilling device for shafts in the AA arrow position shown in FIG. It is a partial expanded sectional view of the rock drilling device for shafts in the BB arrow position shown in FIG. It is a figure showing an example of an operating state of the rock drilling device for shafts. It is a fragmentary sectional view for explaining an example in which a roof was attached to a stand of the rock drilling device for shafts. It is a top view of the rock drilling device for shafts which concerns on 2nd Embodiment of this invention. It is a partial expanded sectional view of the rock drilling device for shafts in the CC arrow position shown in FIG. FIG. 7 is a partially enlarged cross-sectional view of the rock drilling device for a shaft at the position shown by the arrow D-D shown in FIG. 6. It is the figure which showed an example of the operation state of the rock drilling device for shafts shown in FIG.

  An embodiment of a rock drilling device for a shaft according to the present invention will be described below with reference to the accompanying drawings.

  1 to 4 are views for explaining the schematic configuration of a rock drilling device 100 for a shaft according to the first embodiment of the present invention, FIG. 1 is a top view, and FIG. 2 is A- shown in FIG. FIG. 3 is a partially enlarged cross-sectional view at the position of arrow A, FIG. 3 is a partially enlarged cross-sectional view at the position of arrow BB shown in FIG. 1, and FIG. 4 is a diagram showing an example of an operating state. In addition, below, the rock drilling device 100 for shafts is only called the drilling device 100.

  The drilling device 100 is used as a device for vertically drilling a plurality of holes 2 required for digging the rock G by blasting in the hole bottom rock G1 of the shaft 1 in the method of constructing the shaft 1 in the rock G. It is a thing.

  In this embodiment, the shaft 1 has a circular cross section, as shown in FIG. The hole wall inner peripheral surface G2 exposed by the excavation due to the blasting of the bedrock G is covered with a vertical shaft 1a made of cylindrical concrete. The shaft body 1a is constructed so as to be sequentially added downward in accordance with the digging due to the blasting of the rock mass G, and is fixed to the rock mass G around the shaft body 1a by a lock bolt or the like not shown.

  As shown in FIGS. 1 to 3, the drilling device 100 includes a drifter 10, a guide cell 20, a slide rail 30, a mount 40, a lifting rail 50, and a connecting body 60.

  As shown in FIG. 2, the drifter 10 is provided with a rod 12 having a bit 11 at its tip and rotates the rod 12. In this embodiment, as the drifter 10, for example, a general one used in a crawler type drill machine is used, and is configured to rotate and vibrate the rod 12. Specifically, the drifter 10 has a drifter main body 10a that rotates and vibrates the rod 12. The drifter main body 10a is, for example, a hydraulic drive type.

  The guide cell 20 supports the drifter 10 so as to be able to advance and retreat in the vertical direction with the bit 11 facing the hole bottom rock G1. The guide cell 20 specifically includes a guide cell main body 21, a holder 22, and a centrizer 23.

  The guide cell main body 21 supports the drifter 10 so as to be capable of advancing and retreating in the vertical direction, and is vertically installed while being fixed to the holder 22. Although illustration is omitted, for example, a hydraulic drive type drifter feeding (advancing and retracting) motor is provided at the upper end portion of the guide cell main body 21, and the drifter 10 is operated by operating this drifter feeding motor. It moves vertically along the guide cell body 21.

  The holder 22 holds the guide cell main body 21 in a vertically standing state and engages with the slide rail 30 slidably along the slide rail 30. It connects with the rail 30 for slides. Specifically, for example, the holder 22 holds the holder engaging portion 22a that engages with the slide rail 30 slidably along the slide rail 30 via the roller 22a1 in the horizontal direction, and the holder engaging portion 22a. And a holder body portion 22b that holds the guide cell body 21. The guide cell body 21 is fixed to the side portion of the holder body 22b.

  The centralizer 23 is provided at the lower end portion of the guide cell body 21, penetrates into the hole-bottom rock mass G1, and positions the guide cell body 21, and has a blade portion 23a that can penetrate into the hole-bottom rock mass G1. It has a base portion 23b for fixing the blade portion 23a. Further, the rod 12 of the drifter 10 penetrates the base portion 23b of the centrizer 23, and the base portion 23b supports the rod 12 of the drifter 10 so that the rod 12 can rotate and move forward and backward in a state of being erected in the vertical direction.

  The slide rail 30 supports the guide cell 20 so as to be slidable in the horizontal direction. The slide rail 30 is made of, for example, H-shaped steel, is fixed to the lower surface of the gantry 40, and extends in the horizontal direction along the lower surface of the gantry 40. Although illustration is omitted, the holder 22 is provided with an electric motor for sliding that rotationally drives the roller 22a1. By operating the electric motor for sliding, the guide cell 20 is moved along with the drifter 10 to the rail for sliding. It slides horizontally along 30.

  In the present embodiment, the slide rails 30 are provided at a plurality of places (two places in the figure) on the gantry 40, and the drifter 10 and the guide cell 20 are provided corresponding to each of the slide rails 30. . The installation position of the slide rail 30 will be described in detail later.

  The gantry 40 is located above the borehole rock G1 and supports the slide rail 30. The gantry 40 is supported so as to be vertically movable along a lifting rail 50 via a connecting body 60 as described later. The gantry 40 is made of, for example, a steel plate or a grating member, and has predetermined equipment such as a hydraulic drive type drifter main body 10a and a hydraulic unit 70 (see FIG. 1) serving as a drive source of the drifter feed motor, and heavy equipment ( (Not shown) and the like can be mounted.

  In the present embodiment, the gantry 40 extends horizontally from the central axis O of the shaft 1 toward the inner wall surface 1b of the shaft 1 (specifically, the shaft body 1a). In the present embodiment, the gantry 40 is formed in a fan shape in plan view as shown in FIG. Specifically, the lengths of the two sides of the gantry 40 other than the arc portion are approximately matched with the radius (inner radius) of the shaft body 1a, and the central angle of the fan formed by the two sides is approximately 90 °. The arcuate portion extends along the inner wall surface 1b of the shaft body 1a. The gantry 40 has an area of about 1/4 of the area of the horizontal section of the vertical shaft 1.

  More specifically, for example, a triangular reinforcing plate 41 (see FIG. 3) radially extending from the fan center toward the arc portion is attached to the lower surface of the gantry 40 by welding or the like to reinforce the gantry 40. Has been done. The oblique side of the reinforcing plate 41 is formed so as to approach the lower surface of the gantry 40 toward the center side of the fan.

  In the present embodiment, as shown in FIG. 1, the slide rails 30 are provided along each of the two sides of the fan-shaped mount 40 other than the arc portion, and the slide rails 30 are provided corresponding to the two sides. A drifter 10 and a guide cell 20 are provided. That is, each of the slide rails 30 extends substantially from the central axis O of the vertical shaft 1 in the radial direction of the vertical shaft body 1a. Therefore, the drifter 10 and the guide cell 20 are configured to be movable in the radial direction of the shaft body 1a from approximately the central axis O to the vicinity of the inner wall surface 1b.

  The elevating rail 50 is a rail for vertically elevating the apparatus main body 80 including the drifter 10, the guide cell 20, the sliding rail 30, and the gantry 40. The elevating rail 50 extends in the vertical direction along the inner wall surface 1b of the vertical shaft 1 (vertical shaft body 1a) and is fixed to the inner wall surface 1b. The elevating rail 50 is made of, for example, H-shaped steel, and extends along the inner wall surface 1b of the shaft body 1a to a predetermined distance before (a predetermined distance above) from the hole bottom rock mass G1 to be blasted. . As described above, the shaft body 1a is constructed so as to be sequentially added downward in accordance with the excavation due to the blasting of the bedrock G, and the elevation rail 50 is also added along the inner wall surface 1b of the shaft body 1a. Then, they are successively added downward.

  In the present embodiment, the lifting rails 50 are provided at three or more locations that are spaced apart in the circumferential direction of the inner wall surface 1b (eight locations that are equally spaced in the circumferential direction in the figure).

  The connecting body 60 connects the lifting / lowering rail 50 and the gantry 40 so that the apparatus body 80 can be lifted / lowered in the vertical direction along the lifting / lowering rail 50.

  In the present embodiment, the connecting body 60 enables the device main body 80 to be vertically moved up and down along the elevating rail 50, and the device main body 80 to be rotatable about the central axis O of the vertical shaft 1 so that the device main body 80 and the elevating rail 50 can be rotated. It connects with the gantry 40. That is, the connecting body 60 that connects between the lifting rail 50 and the gantry 40 is capable of vertically moving the gantry 40 along the lifting rail 50 and pivoting around the central axis O of the vertical shaft 1. Support 40.

  In the present embodiment, the connecting body 60 is slidable in the vertical direction along the elevating rail 50, and the connecting body engaging portion 61 engaging with the elevating rail 50 and the inner side of the connecting body engaging portion 61. It has a turning rail 62 that extends in an annular shape and is supported by the coupling body engaging portion 61 and that supports the gantry 40 so as to be rotatable around the central axis O of the vertical shaft 1. In addition, in the present embodiment, the coupling body engaging portion 61 corresponds to the “engagement portion” according to the present invention.

  Specifically, the coupling body engaging portions 61 are provided corresponding to the respective elevating rails 50, and eight are provided in the present embodiment. The turning rail 62 is formed by bending an H-shaped steel into an annular shape, for example. That is, in the present embodiment, the connecting body 60 is configured to include eight connecting body engaging portions 61 and one turning rail 62. More specifically, the coupling body engaging portion 61 has a sliding portion 61a and a rail supporting portion 61b. The sliding portion 61a has a groove having a shape that matches the cross-sectional shape of one flange portion of the elevating rail 50, and the one flange portion of the elevating rail 50 can be inserted into this groove. . The rail support portion 61b is a portion that horizontally projects from the lower end of the sliding portion 61a toward the central axis O of the vertical shaft 1. One flange portion of the turning rail 62 is fixed on the rail support portion 61b of each coupling body engaging portion 61. On the lower surface of both ends of the arc portion of the gantry 40 and the lower surface at the center in the arc direction, the other flange of the turning rail 62 is slidable along the other flange portion of the turning rail 62 via the roller 40a1. The gantry engaging parts 40a that engage with the parts are fixed. The gantry engaging portions 40a are provided at three locations on the lower surface of the circular arc portion of the gantry 40, with the openings of the groove portions into which the other flange portion of the turning rail 62 can be inserted facing downward.

  Although illustration is omitted, for example, a chain for raising and lowering the connecting body 60 is provided along the lifting rail 50, and a lifting electric motor is provided at the upper end portion of the lifting rail 50. By operating the electric motor for raising and lowering, the chain is driven to raise and lower the connecting body 60 along the rail 50 for raising and lowering, and thus the gantry 40 is raised and lowered in the vertical direction. Similarly, although not shown, the gantry engaging portion 40a is provided with a turning electric motor for rotationally driving the roller 40a1, and by operating the turning electric motor, the gantry 40 is lifted. It swivels around the central axis O along the swiveling rail 62 together with 10, the guide cell 20, and the sliding rail 30. That is, the device body 80 swivels around the central axis O. It should be noted that the lifting drive mechanism including the lifting chain and the lifting electric motor may be provided at the minimum necessary position among the eight lifting rails 50. Further, similarly, the turning drive mechanism including the turning electric motor for turning may be provided at the minimum necessary position among the three gantry engaging portions 40a.

  Next, the operation of the hole drilling device 100 will be described with reference to FIGS. It is assumed that the shaft 1 has already been built up to a predetermined depth, and the case of further digging the rock G by blasting will be described as an example.

  First, in each holder 22 provided on each of the two sides of the gantry 40, the slide electric motor (not shown) that rotationally drives the roller 22a1 is operated to slide the guide cell 20 together with the drifter 10. It is slid along the rail 30 in the horizontal direction (specifically, in the radial direction of the shaft body 1a). At this time, as shown in FIG. 1, the radial position (radial position) of one drifter 10 and the radial position (radial position) of the other drifter 10 are different from each other.

  Next, by operating the elevating electric motor (not shown), as shown by a broken line in FIG. 2, the pedestal 40 is moved to a height position where the tip of the blade portion 23a of the centrizer 23 penetrates the hole bottom rock G1. To lower. As a result, the guide cell main body 21 is securely held in the upright state by the holder 22 and the hole bottom rock mass G1. In addition, in the present embodiment, the pedestal 40 is lowered in order to penetrate the blade portion 23a of the centrizer 23 into the hole bottom rock G1. It is also possible to connect the guide cell main body 21 and the holder 22 so that the guide cell main body 21 can be moved up and down, and to provide a drive unit such as a hydraulic cylinder for moving the guide cell main body 21 up and down.

  Next, the hydraulic unit 70 is activated and the drifter 10 is operated to rotate the rod 12 and vibrate the rod 12. After that, by operating the drifter feed motor (not shown), the drifter 10 is vertically lowered along the guide cell body 21 as shown by a broken line in FIG. Then, the hole 11 is drilled by the bit 11 at the tip of the rod 12. The feed amount (in other words, the descending amount) of the drifter 10 can be set as appropriate, and the hole 2 having a length (depth) corresponding to the set feed amount is drilled in the hole bottom rock mass G1. This drilling operation is performed in parallel in the two drifters 10, for example. Thereafter, the lifter feed motor is reversed and the lift electric motor is reversed so that the drifter 10 is raised to the initial position and the gantry 40 is raised so that the blade portion 23a of the centrizer 23 is moved to the hole bottom rock mass. It is separated from G1. By the boring operation and the separating operation of the centrizer 23, the boring of the hole 2 at each angular position and radial position shown in FIG. 1 by the two drifters 10 is completed.

  Next, for example, as shown in FIG. 4, in the gantry engaging portion 40a, the electric motor for rotation (not shown) that rotationally drives the roller 40a1 is operated to move the gantry 40 to the drifter 10, the guide cell 20, and the guide cell 20. The slide rail 30 is swung along the swivel rail 62 about the central axis O by a predetermined angle. That is, the radial positions of the two drifters 10 shown in FIG. 1 are fixed, and only the angular positions around the central axis O are changed. After that, at the changed angular position, the boring operation and the separating operation of the centrizer 23 are performed. Then, the angular position is sequentially changed by one turn around the central axis O, and the drilling operation and the separating operation are performed at each angular position, so that each drifter 10 causes the central axis O of the vertical shaft 1a. A plurality of holes 2 are sequentially drilled along a circle centered at and having a radius corresponding to each radial position. After that, the electric motors for sliding are operated to slide each drifter 10 in the radial direction, and the radial position of each drifter 10 is changed so as not to overlap the radial position of the hole 2 that has already been drilled. Then, at the changed radial position, only the angular position is sequentially changed, and the plurality of holes 2 are drilled by each drifter 10 along a circle having a radius corresponding to the changed radial position. As a result, a plurality of holes 2 are comprehensively drilled over the entire hole bottom rock mass G1 inside the shaft body 1a. The drilling order of the holes can be appropriately determined according to the planned drilling position, that is, the drilling pattern. In addition, it is preferable to provide a control unit that presets the operation sequence such as the rotation of the gantry 40 and the sliding movement of the drifter 10 in the radial direction according to the drilling pattern and automatically executes the above-described operation.

  Next, the apparatus main body 80 including the gantry 40 is raised to the ground, for example, by reversing the lifting electric motor. In this state, the explosive charge is loaded into each of the plurality of holes 2 drilled in the hole bottom rock mass G1 by a construction worker of the vertical shaft 1 or the like. Then, the worker or the like covers the hole bottom rock mass G1 with a curing mat or the like to prepare for blasting. After that, the rocky bottom rock G1 is blast-crushed. The discharge of the shear generated by the blast crushing may be performed, for example, by hoisting the shear vessel between the ground and the hole bottom rock G1, or disposing a simple hoisting machine such as a chain block on the gantry 40, It is possible to stack the shear vessels on the gantry 40 by this lifting machine and then raise the gantry 40 to the ground to discharge the shear to the outside of the shaft. If the shear after blasting and crushing is large, the shear is broken into small pieces with a breaker. Further, for example, by crushing the bedrock G below the existing shaft body 1a with a breaker or the like, a new hole wall inner peripheral surface G2 is surely extended downward and exposed. After the shear is discharged, the vertical shaft body 1a for lining the new hole wall inner circumferential surface G2 is added below the existing vertical shaft body 1a and is fixed to the surrounding rock mass G by a lock bolt or the like. After that, the rails 50 for raising and lowering are added downward along the inner wall surface 1b of the shaft body 1a to which the rails 50 are added. As a result, the preparation for drilling the plurality of holes 2 in the hole bottom rock mass G1 at the next depth position is completed. After that, the hole drilling device 100 drills a plurality of holes 2 in the hole bottom rock mass G1 at this depth position in the above-described hole drilling pattern according to the procedure described above. In this way, the drilling device 100 continuously drills a plurality of holes 2 in the rock-bottom rock G1 in accordance with the excavation of the rock-bottom rock G1 due to blasting or the like.

  According to the hole boring machine 100 according to the present embodiment, in the hole boring machine 100 capable of vertically boring a plurality of holes 2 in the hole bottom rock mass G1 of the vertical shaft 1, the bit 11 is directed toward the hole bottom rock mass G1. Since the guide cell 20 that supports the drifter 10 in the vertical direction is supported by the slide rail 30 that supports the drift cell 10 in the horizontal direction so as to be slidable in the horizontal direction, the guide cell 20 is moved along the slide rail 30. At the same time, by repeating the operation of lowering along the guide cell 20 while operating the drifter 10, the plurality of holes 2 can be easily drilled in the hole bottom rock G1. The drilling device 100 is an elevating rail 50 for vertically elevating the device main body 80 including the drifter 10, the guide cell 20, the sliding rail 30, and the frame 40, and is provided on the inner wall surface 1b of the vertical shaft 1. Since it has the lifting rail 50 that extends vertically along and is fixed to the inner wall surface 1b, after drilling a plurality of holes 2 in the rock-bottom rock G1, the device is moved along the lifting rail 50. The device body 80 can be retracted by raising the body 80. Therefore, after loading the explosive into the drilled hole 2, the device main body 80 is raised along the elevating rail 50, and the hole bottom rock mass G1 is covered and cured by, for example, a curing mat. The rock-bottom rock G1 can be blast-crushed without lifting work from the hole bottom to the ground. Then, after that, by lowering the device main body 80 along the lifting rails 50, the drilling of the plurality of holes 2 to the hole bottom rock mass G1 is performed without performing the work of hanging from the ground to the hole bottom by a crane or the like. It can be continued.

  In this way, it is possible to provide the drilling device 100 capable of continuously drilling a plurality of holes 2 in the rock bottom rock G1 without performing a re-installation work such as a lifting work of the device.

  In the present embodiment, the vertical shaft 1 has a circular cross section, and the elevating rails 50 are provided at three or more locations that are spaced apart in the circumferential direction of the inner wall surface 1b. As a result, the device body 80 can be raised and lowered while being stably supported.

  In the present embodiment, the gantry 40 extends horizontally from the central axis O of the vertical shaft 1 toward the inner wall surface 1b of the vertical shaft 1 (vertical shaft body 1a). Thereby, the slide rail 30 can be easily extended from the central axis O of the vertical shaft 1 to the vicinity of the inner wall surface 1b.

  In this embodiment, the gantry 40 is formed in a fan shape in plan view. This makes it possible to easily extend the plurality of slide rails 30 from the central axis O of the vertical shaft 1 to the vicinity of the inner wall surface 1b while forming the gantry 40 compact.

  In the present embodiment, the sliding rail 30 is extended along each of the two sides of the fan-shaped mount 40 other than the arc portion, and the drifter 10 and the guide cell 20 are provided corresponding to each of the two sides. Accordingly, even when the cantilever support structure is adopted by connecting the circular arc portion of the gantry 40 to the lifting rail 50, the drifters 10 are provided on each of the two sides of the gantry 40, and at the time of drilling, Since the two sides are supported via the rod 12 and the centrizer 23, the gantry 40 can be supported more reliably and stably.

  In the present embodiment, the connecting body 60 that connects the lifting rail 50 and the gantry 40 can vertically move the gantry 40 along the lifting rail 50 and can pivot about the central axis O of the vertical shaft 1. It is configured to support the gantry 40. This allows the slide rail 30 to move the drifter 10 in the radial direction and rotate the gantry 40 to position the drifter 10, for example, so that it is easy to comprehensively cover the entire hole bottom rock mass G1. A plurality of holes 2 can be formed in the.

  In the present embodiment, specifically, the connecting body 60 includes a connecting body engaging portion 61 that engages with the elevating rail 50 slidably in the vertical direction along the elevating rail 50, and a connecting body engaging portion. A swirl rail 62 that extends in an annular shape inside 61 and is supported by the coupling body engaging portion 61 and that supports the gantry 40 so as to swivel around the central axis O of the vertical shaft 1 is provided. Thus, the lifting rail 50 and the gantry 40 can be easily connected in a state where the gantry 40 can be raised and lowered and turned.

  As shown in FIG. 5, the drilling device 100 may further include a roof 90 attached to the gantry 40 so as to cover the gantry 40 from above. Here, for example, it is assumed that the generated shear is discharged to the outside of the shaft by hoisting the shear vessel between the ground and the bottom rock G1. In this case, an operator working on the gantry 40, equipment such as the hydraulic unit 70, and heavy equipment are located immediately below or near the shear vessel suspended by a crane on the ground, that is, immediately below the suspended load and in the vicinity immediately below the suspended load. However, the roof 90 can prevent an accident due to a drop such as a slip, although there is a possibility of a drop such as a slip.

  6 to 9 are views for explaining the schematic configuration of the hole drilling device 100 ′ according to the second embodiment of the present invention, FIG. 6 is a top view, and FIG. 7 is a C-C arrow shown in FIG. 8 is a partially enlarged cross-sectional view at the viewing position, FIG. 8 is a partially enlarged cross-sectional view at the D-D arrow position shown in FIG. 6, and FIG. 9 is a diagram showing an example of an operating state. The same elements as those of the drilling device 100 according to the first embodiment are designated by the same reference numerals, and a description thereof will be omitted. Only different portions will be described.

  In the hole drilling device 100 ', the gantry 40' is not formed in a fan shape in plan view, but is formed in a rectangular shape extending in one direction in plan view, as shown in FIGS. 6 and 9. The gantry 40 'is made of, for example, a steel plate or a grating member, like the gantry 40. Further, in the hole drilling apparatus 100 ′, the gantry engaging portions 40a that engage with the other flange portion of the turning rail 62 are fixed to the lower surfaces of both ends of the gantry 40 ′, as shown in FIG. . Then, the gantry 40 'is bridged on the turning rail 62 through the two gantry engaging portions 40a so as to pass through the central axis O of the vertical shaft 1 in a top view, and both ends of the gantry 40' are turned on to the turning rail 62. Slide along. As a result, the gantry 40 'is connected to the turning rail 62 so as to be turnable around the central axis O.

  The slide rail 30 is provided along the lower surface of the gantry 40 'so as to extend between the gantry engaging portions 40a at both ends. In the hole drilling device 100 ′, the slide rail 30 also has the function of the reinforcing plate 41 in the first embodiment.

  Two guide cells 20 are provided along one slide rail 30, and the drifter 10 is held in each of the guide cells 20. In the drilling device 100 ′, the two drifters 10 and the guide cells 20 are provided, but the present invention is not limited to this, and one or three or more may be provided (similarly in the first embodiment). Further, when the turning electric motor is operated, the gantry 40 ′ turns around the central axis O along the turning rail 62 together with the drifter 10, the guide cell 20, and the sliding rail 30 like the gantry 40. To do. That is, the device body 80 swivels around the central axis O.

  With such a configuration, also in the drilling device 100 ′ according to the second embodiment, as with the drilling device 100 ′, a plurality of holes are formed in the rock-bottom rock G1 without performing re-installation work such as lifting work of the device. The hole 2 can be continuously drilled.

  In each of the embodiments, the guide cell 20 may have a structure in which the drifter 10 is supported by the mounts 40 and 40 'so as to be rotatable along the vertical plane. That is, a structure may be employed in which the drifter 10 is supported so as to be tiltable with respect to the vertical direction and the drifter 10 is tilted. Specifically, although not shown, the holder 22 and the guide cell body 21 may be connected so that the drifter 10 can be tilted at least within a range of 90 ° from the vertical direction to the horizontal direction. Accordingly, holes for inserting the rock bolts for fixing the shaft 1a to the rock G into the shaft 1a and the rock G can also be drilled by the drilling device 100, 100 '.

  Further, in the above description, the shaft 1 has a circular cross section, but the shaft 1 is not limited to this, and a shaft 1 having an appropriate cross-sectional shape such as an ellipse or a quadrangle can be adopted. Further, the hole wall inner peripheral surface G2 exposed by the excavation due to the blasting of the bedrock G is to be lined with a vertical shaft body 1a made of concrete, and the inner wall surface 1b of the vertical shaft 1 is an inner wall surface of the vertical shaft body 1a. However, the lining is not limited to this, and an appropriate lining member such as a tubular steel sheet pile (liner plate) can be applied.

  Further, in the above description, in the vertical shaft construction method, the case where the rock mass G is exploded and crushed to dig the rock mass is given as an example, and the hole 2 for loading explosives is drilled using the hole drilling devices 100 and 100 ′. did. In other words, the boring devices 100 and 100 'bore the holes for loading explosives. However, the application of the hole 2 to be drilled by the hole drilling device 100, 100 'is not limited to the explosive loading. For example, in the vertical shaft construction method, not by blasting, but by crushing a hole bottom bedrock G1 having a plurality of holes 2 crushed by a breaker, a hammer, or the like, or by filling a static crushing agent into the drilled holes There is a case where a static crushing agent construction method for crushing the hole bottom rock G1 by the expansive force is used. In these cases, the hole 2 is not used for explosive loading (blasting). Therefore, in the hole drilling devices 100 and 100 ′, there is a case where it is not necessary to retract the device main body 80 including the gantry 40 and 40 ′ upward along the elevating rail 50 in preparation for blasting, but the device main body 80 is moved up and down. With this configuration, it is possible to easily discharge the generated shear to the outside of the vertical shaft 1 by using the gantry 40, 40 'capable of moving up and down. Further, since the hole drilling devices 100 and 100 'do not occupy any area of the rock-bottom rock G1 and can secure a free and open space over the whole rock-bottom rock G1, a vertical shaft construction is possible. Installation or temporary placement of predetermined equipment (such as shear vessel, shearing machine, spraying machine for lining) necessary for other processes (cycles) other than the drilling process of the hole bottom rock mass G1 in the construction method Space can be secured. That is, the hole drilling devices 100 and 100 'are not limited to the case of digging by blasting, and are suitable devices commonly used in the shaft construction method of constructing the shaft 1.

  Although the embodiment of the present invention and the modified example thereof have been described above, the present invention is not limited to the above-described embodiment and the modified example, and further modifications and changes can be made based on the technical idea of the present invention. Of course.

DESCRIPTION OF SYMBOLS 1 ... Vertical shaft 1b ... Inner wall surface 2 ... Hole 10 ... Drifter 11 ... Bit 12 ... Rod 20 ... Guide cell 30 ... Sliding rail 40 ... Stand 50 ... Elevating rail 60 ... Linkage 61 ... Linkage engagement part (engagement Part)
62 ... Turning rail 80 ... Device main body 90 ... Roof 100 ... Drilling device (rock shaft drilling device for vertical shaft)
G1 ... Porebed O ... Central axis

Claims (9)

In a rock drilling device for a shaft, which is capable of drilling a plurality of holes vertically in the rock bottom of the shaft,
A drifter having a rod having a bit at its tip and rotating the rod;
A guide cell for supporting the drifter in a vertical direction so that the bit can be moved toward and away from the hole bottom rock,
A slide rail for supporting the guide cell so as to be slidable in the horizontal direction,
A pedestal that is located above the hole bottom rock and supports the slide rail,
An elevation rail for vertically elevating an apparatus main body including the drifter, the guide cell, the slide rail, and the gantry, the inner wall surface extending vertically along an inner wall surface of the shaft. The lifting rail fixed to
Including rock shaft drilling equipment for shafts. The shaft has a circular cross section,
The rock drilling device for a shaft according to claim 1, wherein the elevating rails are provided at three or more locations that are spaced apart in the circumferential direction of the inner wall surface.   The rock drilling device for a shaft according to claim 2, wherein the mount is horizontally extended from a central axis of the shaft toward an inner wall surface of the shaft.   The rock drilling device for a shaft according to claim 3, wherein the gantry is formed in a fan shape in a plan view. The slide rail is extended along each of the two sides of the fan-shaped mount other than the arc portion,
The rock drilling device for a shaft according to claim 4, wherein the drifter and the guide cell are provided corresponding to each of the two sides. A connecting body for connecting between the elevating rail and the gantry, which supports the gantry so that the gantry can be vertically moved along the elevating rail and can be swiveled around a central axis of the vertical shaft. The connected body to
The rock drilling device for a shaft according to any one of claims 1 to 5, further comprising: The connecting body is
An engaging portion that is slidable in the vertical direction along the lifting rail and that engages with the lifting rail,
A turning rail that extends in an annular shape on the inside of the engaging portion and is supported by the engaging portion, and that supports the gantry so as to be rotatable around the central axis of the shaft,
The rock drilling device for a shaft according to claim 6, comprising:   The rock drilling device for a shaft according to any one of claims 1 to 7, wherein the guide cell is rotatably supported on the gantry so that the drifter can be rotated along a vertical plane. A roof attached to the mount so as to cover the upper part of the mount,
The rock drilling device for a shaft according to any one of claims 1 to 8, further comprising: