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大慶石油學院本科生畢業(yè)設計（論文）
Anchor drilling
Document Type and Number:
United States Patent 4201270
Abstract:
An operator controlled roof bolter with a flexible shaft drill and a roof bolt inserter for drilling and inserting a roof bolt into an unsupported roof of a mine while the operator is positioned at an outby station under a supported roof. The flexible shaft roof drill is constrained to a frame of the roof bolter for pivoting movement between a rest position and a working position. The roof bolt inserter is mounted on a slide for linear movement and limited rotational movement between a retracted position and an extended position for positioning a roof bolt held by the inserter into registration with a hole drilled by the roof drill.
Inventors:
Ribich, William A. (Lexington, MA, US)
Hug, Hans A. (Weston, MA, US)
Bellows, Alfred H. (Belmont, MA, US)
Application Number:
906237
Filing Date: 05/15/1978
Publication Date: 05/06/1980
Primary Class: 173/193
Other Classes: 81/57.25, 81/57.41, 173/46, 173/52, 405/259.1, 405/303.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to the supporting of underground mine roofs and, more particularly, is directed towards an apparatus for drilling holes in the roof of a mine and for inserting roof bolts into such holes.
2. Description of the Prior Art
In underground mines, the roof is supported by roof bolts which are inserted into holes drilled into the roof strata. An apparatus for drilling holes having a depth substantially greater than the height of the mine passageway in which the apparatus is located is described in U.S. Pat. No. 4,057,115. An apparatus for inserting roof bolts into the drilled holes is described in U.S. Pat. No. 4,003,233.
Although progress has been made in roof bolting apparatus, roof bolting remains one of the most hazardous mining occupations for several reasons. The operator inserting the roof bolt is stationed inby at an area in which the roof is unsupported. It is the operator's task to drill and to insert roof bolts in this unsupported area. Consequently, the operator is exposed to the hazard of having sections of the unsupported roof fall on him. Mine personnel have been injured by flying objects from the exposed rotating drill steel and tools employed to tighten the roof bolts. Workers are also exposed to the risk of being caught on and pulled into the rotating portions of the mining apparatus.
Attempts to develop roof bolters which are capable of remotely installing bolts have been met with limited success even for the simplest case when the bolts are shorter than the height of the mine passageway. Such attempts have resulted in complex and costly systems which suffer from low reliability due to many moving parts and continual readjustment. A need has arisen for an improved roof bolting system which does not suffer from the heretofore mentioned disadvantages.
What is claimed is:
1. An operator controlled roof bolting system for drilling holes in the roof strata of a mine and for inserting roof bolts into the drilled holes while the operator is in a safe area, said system comprising:
(a) a frame with an outby operator's station;
(b) roof drill means for drilling a hole in the roof strata, said roof drill means mounted to said frame for pivotal movement about an axis between a rest position and a working position;
(c) first means operatively connected to said roof drill means and said frame for pivotally moving said roof drill means about said axis between said rest position and said working position:
(d) roof bolt inserter means for inserting a roof bolt into a hole drilled in the roof strata by said roof drill means, said roof bolt inserter means mounted to said frame for movement between a retracted position and an extended position, said roof bolt inserter means including slide means mounted to said frame for pivoting movement about said axis; and
(e) second means operatively connected to said roof bolt inserter means and said frame for moving said roof bolt inserter means between said retracted position and said extended position, said roof bolt inserter means proximate to said operator's station when in said retracted position, whereby the operator can place a roof bolt in said roof bolt inserter means while remaining at said operator's station.
2. The system as claimed in claim 1 wherein said roof drill means is a flexible shaft roof drill.
3. The system as claimed in claim 1, wherein said roof drill means is a longer-than-seam height drill.
4. The system as claimed in claim 1 wherein said roof bolt inserter means includes a working head mounted to said slide means, said slide means pivotally mounted to said frame, third means operatively connected to said slide means and said frame for pivotally moving said slide means about said axis.
5. The system as claimed in claim 1, including a plate for pushing a roof bolt inserted into the drilled hole and plate means for moving said plate into engagement with the roof bolt, said plate means connected to said frame and said plate.
6. An operator controlled roof bolting system for drilling holes in the roof strata of a mine and for installing roof bolts into the drilled holes while the operator is in a safe or supported area, said system comprising: (a) a frame;
(b) roof drill means for drilling a hole in the roof strata, said roof drill means configured to drill a hole having a depth which is greater than the height of the mine, said roof drill means mounted to said frame for pivoting movement about an axis between a rest position and a working position;
(c) first actuator means operatively connected to said roof drill means and said frame for pivotally moving said roof drill means about said axis;
(d) roof bolt inserter means for inserting a roof bolt into a hole drilled in the roof strata by said roof drill means, said roof bolt inserter means including slide means and a working head, said slide means mounted to said frame for pivoting movement about said axis, said slide means linearly movable between a retracted position and an extended position, said working head carried by said slide means and linearly movable between said retracted position and said extended position, said working head configured to insert a roof bolt having a length which is no longer than the height of the mine into a hole drilled by said roof drill means, said drill means and said roof bolt inserter means independently movable about said axis;
(e) second actuator means operatively connected to said slide means for linearly moving said slide means between said retracted position and said extended position;
(f) third actuator means operatively connected to said slide means and said frame for pivotally moving said working head about said axis;
(g) said roof bolt inserter proximate to said operator's station when in said retracted position, whereby the operator can place a roof bolt in said roof bolt inserter while remaining at said operator's station.
7. The system as claimed in claim 6 wherein said roof drill means includes a drill and an arm, said drill carried by said arm, fourth actuator means operatively connected to said drill and said arm for moving said drill relative to said arm, said drill constrained for substantially vertical movement relative to said arm, said arm pivotally mounted to said frame for movement about said axis.
8. The system as claimed in claim 7 including torquer means mounted to said working head, said torquer means configured to engage the inserted roof bolt and to tighten the roof bolt to a perdetermined torque.
9. An operator controlled roof bolting system for drilling holes in the roof strata of a mine and for inserting roof bolts into the drilled holes while the operator is in a safe area, said system comprising:
(a) a frame with an outby operator's station;
(b) roof drill means for drilling a hole in the roof strata, said roof drill means pivotally mounted to said frame for pivotal movement about a first axis between a rest position and a working position;
(c) first means operatively connected to said roof drill means and said frame for pivotally moving said roof drill means about said first axis between said rest position and said working position;
(d) roof bolt inserter means for inserting a roof bolt into a hole drilled in the roof strata by said roof drill means, said roof bolt inserter means slidably mounted to said frame for slidable movement between a retracted position and an extended position; said roof bolt inserter means including a working head and slide means, said slide means pivotally mounted to said frame;
(e) second means operatively connected to said roof bolt inserter means and said frame for slidably moving said roof bolt inserter means between said retracted position and said extended position; and
(f) third means operatively connected to said slide means and said frame for pivotally moving said slide means about said first axis;
(g) said roof bolt inserter means proximate to said operator's station when in said retracted position, whereby the operator can place a roof bolt in said roof bolt inserter means while remaining at said operator's station.
10. An operator controlled roof bolting system for drilling holes in the roof strata of a mine and for inserting roof bolts into the drilled holes while the operator is in a safe area, said system comprising:
(a) a frame with an outby operator'station;
(b) a flexible shaft roof drill for drilling a hole in the roof strata, said roof drill mounted to said frame for movement between a rest position and a working position;
(c) first means operatively connected to said roof drill and said frame for moving said roof drill between said rest position and said working position;
(d) roof bolt inserter means for inserting a roof bolt into a hole drilled in the roof strata by said roof drill, said roof bolt inserter means mounted to said frame for movement between a retracted position and an extended position;
(e) second means operatively connected to said roof bolt inserter means and said frame for moving said roof bolt inserter means between said retracted position and said extended position, said roof bolt inserter means proximate to said operator's station when in said retracted position, whereby the operator can place a roof bolt in said roof bolt inserter means while remaining at said operator's station;
(f) third means mounted to said frame; and
(g) a plate mounted to said third means, said plate configured to push a roof bolt inserted into the drilled hole, said third means moving said plate into engagement with the roof bolt.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a roof bolting system which does not suffer from the heretofore mentioned disadvantages and limitations. A further object of the invention is to provide a simple and reliable roof bolting system for remote drilling and insertion of roof bolts, particularly bolts that are longer than the height of the mine passage.
Another object of the invention is to provide a simple and reliable roof bolting system with an outby operator's station for remote drilling and insertion of roof bolts in which an inserter is moved rearwardly towards an operator for reception of the bolt rather than having the bolt fed forwardly to the inserter from the operator. Such a system includes a rugged mechanism for moving the inserter which is simpler and more reliable than bolt feed systems.
Yet another object of the invention is to provide an operator controlled roof bolter with a flexible shaft roof drill or other longer than seam height drill and a roof bolt inserter for drilling and inserting a roof bolt into an unsupported roof of a mine while the operator is outby and is positioned under a supported roof. The flexible shaft roof drill is mounted to a frame of the roof bolter and is constrained for pivoted movement between a rest position and a working position. The roof bolt inserter is configured to bend and feed roof bolts having a length that is greater than the height of the mine passageway. A head of the roof bolt inserter is mounted on a slide for linear movement and limited rotational movement between a retracted position and an extended position in order to align the advancing roof bolt with a hole drilled in the roof strata of the mine by the flexible shaft roof drill. In the retracted position, the inserter is in place to receive a roof bolt from an operator without requiring the operator to leave a supported or safe area. The hole is drilled when the roof drill is in its working position. Upon completion of the drilling step, the roof drill is pivoted to its rest position and the roof bolter inserter is moved to its extended position. A controller is provided for aligning the roof bolt and the drilled hole. A hydraulically actuated plate pushes the inserted roof bolt further into the drilled hole. A torquer engages the inserted roof bolt and tightens the roof bolt to effect the roof support.
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