Automated, low profile drilling/bolting module with carousel

• US 20060272862A1
• Filed: 08/17/2006
• Published: 12/07/2006
• Est. Priority Date: 06/03/2005
• Status: Active Grant

• Current Assignee: J.H. Fletcher & Company.
• Original Assignee: J.H. Fletcher & Company.
• Inventors: Hinshaw, Gregory E., Schwab, William B., Kyslinger, William A., Collins, Craig M., Wilson, Henry E.
• Granted Patent: US 7,438,141 B2
• Time in Patent Office: Days
• US Class Current: 175/52
• CPC Class Codes: E21D 20/006 having magazines for storing and feeding anchoring-bolts combined feeding from racks and connecting of drill rods or the like E21B19/20

Abstract

A module is for use in drilling a borehole in face of a mine passage using a drilling element and installing a bolt in the borehole once formed. The module may include a bolt holder for holding a plurality of bolts and a drilling element holder for holding a plurality of different drilling elements. A manipulator moves along an arcuate path between the bolt and drilling element holders to deliver the respective components to a drill head positioned along the arcuate path. The drill head may also slide relative to the mast in two different directions, and includes a drill guide for determining the location of the face to be worked. Related aspects of control of the module and methods are disclosed.

Claims

1. A drilling element carousel for associating with a drill head, comprising:

a rotatable body carrying a first holder for holding a first drilling element having a first bit and a second holder for holding a second drilling element having a second bit, wherein the body rotates to present either the first drilling element or the second drilling element for insertion in the drill head for forming a borehole.

2. The carousel according to claim 1, wherein each holder comprises first and second pairs of rollers spaced apart in a direction of elongation of the associated drilling element.

3. The carousel according to claim 1, wherein the rollers are made of a flexible material and biased toward each other to define a passage having a dimension less than a diameter of the associated drilling element.

4. The carousel according to claim 1, wherein the first drilling element has a length different from the second drilling element.

5. The carousel according to claim 1, wherein the first and second drilling elements have different nominal diameters.

6. A method of forming a borehole in a face using the carousel of claim 1, comprising:

using the first drilling element to form a starter borehole;

withdrawing the first drilling element from the borehole;

inserting the second drilling element at least partially into the starter borehole; and

advancing the second drilling element into the borehole and form a finished borehole.

7. A method of forming a borehole in a face using a drill head for advancing along an elongated mast defining a drilling path, comprising:

using a first drilling element to form a starter borehole;

withdrawing the first drilling element from the borehole;

inserting a second drilling element at least partially into the starter borehole; and

advancing the second drilling element into the borehole to form a finished borehole.

8. The method of claim 7, further comprising:

inserting a bolt at least partially into the finished borehole; and

advancing the drill head along the mast to advance the bolt into the borehole.

9. The method of claim 8, wherein the step of withdrawing the drill head from a drilling path aligned with the mast precedes the step of inserting the bolt.

10. The method of claim 9, further including the step of returning the drill head to the drilling path before the advancing step.

11. The method of claim 7, wherein the first and second drilling elements are carried by a carousel, and further including the step of rotating the carousel to present the drilling elements to a manipulator for associating the drilling elements with the drill head.

12. A module for use in drilling a borehole in face of a mine passage, comprising:

a manipulator;

a carousel including a rotatable body carrying a first holder for holding a first drilling element having a first bit and a second holder for holding a second drilling element having a second bit, wherein the body may be rotated to present either the first drilling element or the second drilling element for insertion in the drill head for forming the borehole; and

a mast carrying a drill head and a drill guide for receiving the drilling elements;

wherein the manipulator serially delivers the drilling elements from the carousel to the drill head to form the borehole through the passage and returns the drilling elements to the carousel.

13. The module of claim 12, further including a bolt magazine comprising a frame, first and second spaced guides supported by the frame for receiving the plurality of bolts, each guide including an infeed end and a delivery end, and an arm pivotally mounted relative to the frame for engaging at least one bolt received in the guides, the arm being biased toward the delivery end of the guides, wherein the manipulator delivers at least one of the roof bolts to the drill head for installation in the borehole.

14. The module of claim 12, wherein the manipulator comprises:

an arm extending in a radial direction relative to a pivot point about which the arm is pivotally mounted for movement along a generally arcuate path, the arm carrying a pair of generally opposed jaws pivotally mounted for moving between a first, closed position for gripping an object placed in close proximity to an end face of the arm and a second, open position for passing the object without any interference as the arm moves through the arcuate path and without moving in the radial direction.

15. The module of claim 12, wherein the drill guide includes:

a pair of pivotally mounted arms, at least one of the arms includes a first part extending in a first plane and intersecting a first axis, a second offset part extending in a second plane generally parallel to the first plane and intersecting a second axis spaced from the first axis, and a third part connecting the first and second parts.

16. The module of claim 12, further including:

a stab jack actuated by a cylinder including a fluid under pressure for engaging the mine face to fix the position of the module relative to the mine passage;

a sensor for sensing the pressure of the fluid associated with the cylinder and generating an output signal; and

a controller for automatically advancing the stab jack to engage the mine face based on a change in the output signal.

17. The module of claim 12, further including computer-implemented means for causing the drill head, upon receiving a single user input signal, to use the drilling elements to form the borehole.

18. The module of claim 12, further including:

a first user interface including a display for displaying at least one component of the module, wherein the display visualizes the movement of the component during the drilling or bolting operation.

19. The module of claim 12, further including means for detecting contact between the drilling element or the drill guide and the face.

20. The module of claim 12, further comprising:

means for detecting contact between the first drilling element and the face; and

means for initiating a collaring routine if an output from the detecting means indicates a lack of solid contact.