CN-122014303-A - Rock bolting rig and method for rock reinforcement

Abstract

A roof bolter and method for rock reinforcement. The bolting rig (1) comprises a movable carrier (2), a bolting boom (3) mounted to a boom mounting point (16) and a bolting unit (4) mounted to the bolting boom. Furthermore, a cable reel arrangement (9) is provided, comprising a cable reel (18) loaded with a coiled cable (26). The cable reel arrangement is located at the front of the carrier and in front of the boom mounting point.

Inventors

• HAAVISTO ARI
• Heidi Numikolu

Assignees

• 山特维克矿山工程机械有限公司

Dates

Publication Date

20260512

Application Date

20250917

Priority Date

20241111

Claims (9)

1. 1. A rock bolting rig (1) for mounting a cable bolt (5) to a borehole (6) to strengthen a rock surface, Wherein, the jumbolter (1) comprises: -a carriage (2), said carriage (2) being movable in an Operating Direction (OD) and in an opposite Reverse Direction (RD); -at least one bolting boom (3), the at least one bolting boom (3) being mounted to a boom mounting point (16) on the carrier (2) and configured to face the Operating Direction (OD); -at least one bolting unit (4), said at least one bolting unit (4) being mounted to a distal portion of said bolting boom (3); -at least one cable reel arrangement (9), the at least one cable reel arrangement (9) being supported on the carrier (2) and being capable of storing a spooled cable (26); At least one cable feeding device (27, 27 a), the at least one cable feeding device (27, 27 a) for feeding the cable from the cable reel arrangement (9) to the bolting unit (4), and -A guiding arrangement (10) for guiding the cable (26) from the cable reel arrangement (9) to the bolting unit (4); It is characterized in that the method comprises the steps of, The cable reel arrangement (9) is located in front of the boom mounting point (16).
2. 2. The roof bolter of claim 1, wherein the drill rod is, The cable reel arrangement (9) comprises a cable reel (18), the cable (26) being wound on the cable reel (18), and wherein the cable reel (18) is rotatable about a vertical rotation axis (V).
3. 3. The roof bolter of claim 1 or 2, wherein, The cable reel arrangement (9) is located in front of the carrier (2).
4. 4. The bolting rig according to any of the claim 1-3, characterized in, The cable reel arrangement (9) is movably supported to the carrier (2) by means of at least one rotary joint (22, 23) and a rotary actuator.
5. 5. The roof bolting rig according to any of the foregoing claims 1-4, characterized in that, The cable reel arrangement (9) is supported to a manipulator arm (22), which manipulator arm (22) is connected to a front part of the carrier (2) and is configured to protrude from the carrier (2) in a longitudinal direction of the carrier (2).
6. 6. The roof bolting rig according to any of the foregoing claims 1-5, characterized in that, The cable reel arrangement (9) comprises a cable box (25), and a cable reel (18) is arranged within the cable box (25), forming a surrounding and supporting structure for the cable reel (18) around which the cable (26) is wound.
7. 7. The roof bolting rig according to any of the foregoing claims 1-6, characterized in that, The cable reel arrangement (9) is provided with the cable feeding device (27 a) for feeding the cable (26).
8. 8. The roof bolting rig according to any of the foregoing claims 1-7, characterized in that, The roof bolter (1) comprises at least two cable reels (18), and The guiding arrangement (10) comprises a branched guiding element (21), the branched guiding element (21) allowing to selectively feed cables one by one from one of the cable reels (18).
9. 9. A method for rock reinforcement, wherein the method comprises: using a bolting rig (1) comprising a carrier (2), a bolting boom (3), a bolting unit (4) and a cable reel (18); Drilling a borehole (6) into a rock surface by means of a rock drilling machine (7) of the bolting unit (4); Feeding grouting material into the borehole (6); -feeding a cable bolt (5) from the cable reel (18) to the borehole (6) by means of a feeding device (27, 27 a); -cutting the cable bolt (5) outside the borehole (6); It is characterized in that the method comprises the steps of, -Supporting the cable reel (18) at the front of the carrier (2) and allowing the cable reel (18) to operate independently with respect to the bolting boom (3).

Description

Rock bolting rig and method for rock reinforcement Technical Field The present invention relates to a rock bolting rig for installing a cable bolt into a borehole to strengthen a rock surface. The invention also relates to a method for reinforcing a rock surface. The field of the invention is more particularly defined in the preamble of the independent claim. Background In mines, construction sites and at other working areas there is a need to strengthen rock surfaces and thereby ensure their safety and suitability for the intended use. One common method for rock reinforcement is rock bolting (rock bolting). In such reinforcement systems, a plurality of rock bolts are secured in a borehole by a grouting material. In this way, the strata are bonded together, thereby reducing the risk of collapse. There are a number of different rock bolt types and methods for installing a rock bolt. One known and widely used rock bolt is a cable bolt. However, current solutions for installing cable bolts have shown some drawbacks. Disclosure of Invention It is an object of the present invention to provide a new and improved solution for installing cable bolts to strengthen rock surfaces. The bolting rig according to the invention is characterized by the characterizing part of the independent device claim. The method according to the invention is characterized by the characterizing part of the independent method claim. One idea of the disclosed solution is that a rock bolting rig comprises a carrier, at least one bolting boom mounted to a boom mounting point on the carrier, and at least one bolting unit mounted to a distal end portion of the bolting boom. Furthermore, one or more cable reel arrangements for storing the reeled cable and a cable feeding device for feeding the cable from the cable reel arrangement to the bolting unit under the guidance of the guiding arrangement are provided. In addition, the cable reel arrangement is located in front of the boom mounting point. In other words, the cable reel arrangement is located at the front of the carrier when checked in the operating direction. One advantage of the disclosed solution is that the stability of the bolting rig is improved when the cable drum arrangement is located in the front of the carrier. This is due to the fact that heavy components and equipment are typically present at the rear of the bolting rig and that the bolting rig typically has a relatively long back overhang. Thus, the cable reel arrangement at the front can balance the carrier. Another advantage is that the distance between the cable reel arrangement and the bolting unit can be relatively short, whereby feeding of the cable is facilitated. According to one embodiment, the cable reel arrangement is positioned independent of the operation of the bolting boom. Thus, the cable reel is not located on the bolting boom of the bolting unit. When the cable reel arrangement is not moved with the bolting boom, the structure can be simpler and the weight of the cable does not affect the movement of the bolting boom. According to one embodiment, the bolting rig may be provided with rock bolt storage and handling equipment in addition to cable feeding capability. Thus, the bolting rig may comprise a dual system allowing installation of a rock bolt or cable reinforcement. A rock bolt magazine for storing rock bolts and a handling arrangement for picking up rock bolts from the magazine may be provided. According to one embodiment, the bolting boom is mounted to a support frame fastened to the carrier and protruding vertically from the upper surface of the carrier. The bolting boom can be connected to the side surface facing the operating direction by means of a joint system. According to one embodiment, the bolting unit comprises a cutter for cutting the cable. Thus, the cable bolt is formed by cutting the cable after it is inserted into the borehole. According to one embodiment, the guiding arrangement comprises at least one feed tube for guiding the cable from the cable reel arrangement to the bolting unit within the feed tube. According to one embodiment, the cable reel arrangement comprises a cable reel on which a cable is wound, and wherein the cable reel is rotatable about a vertical rotation axis. In other words, the rotatable cord reel is oriented horizontally or primarily horizontally. One advantage of a horizontally oriented cable reel is that the center of gravity of the horizontally oriented cable reel is located at a lower level than a vertically oriented cable reel, and this is beneficial for the stability of the bolting rig. Furthermore, the horizontally oriented cable reels have improved usability, whereby replacement, handling and maintenance measures are easily performed. According to one embodiment, the cable reel may be slightly skewed with respect to the horizontal to facilitate the cable feeding process. The magnitude of the skew is limited. Thus, also in this case, one end surface of the