Method and system for determining structural changes in a longwall mine

a long-wall mine and structural change technology, applied in mining structures, earth drilling and mining, slitting machines, etc., can solve the problems of system heavyness, electrical noise, and the need for lifting equipment to be installed, and achieve the effect of convenient commercial choi

Inactive Publication Date: 2013-10-17
CUT COAL TECH HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0028]It is an object, of some embodiments of the present invention, to provide consumers with improvements and advantages over the above described prior art, and / or overcome and alleviate one or more of the above described disadvantages of the prior art, and / or provide a useful commercial choice.

Problems solved by technology

However there are several problems with this system.
First, the system is heavy and needs lifting equipment to be installed.
Second, the system can be affected by electrical noise and magnetic fields.
Third, as a mine environment is dusty, a lens of the laser needs to be cleaned frequently and a clear line of sight is needed for the measurement to work.
Fourth, the system needs to be installed in a certified fireproof enclosure.
Fifth, the fireproof enclosure requires periodic testing.
Sixth, these systems require line of sight to perform the measurement which can be difficult in the confines of a mine.
Finally, the measurement may be less accurate due to environmental conditions such as dust and moisture.

Method used

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  • Method and system for determining structural changes in a longwall mine
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  • Method and system for determining structural changes in a longwall mine

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Embodiment Construction

[0034]Elements of the invention are illustrated in concise outline form in the drawings, showing only those specific details that are necessary to understanding the embodiments of the present invention, but so as not to clutter the disclosure with excessive detail that will be obvious to those of ordinary skill in the art in light of the present description.

[0035]In this patent specification, adjectives such as first and second, left and right, front and back, top and bottom, etc., are used solely to define one element from another element without necessarily requiring a specific relative position or sequence that is described by the adjectives. Words such as “comprises” or “includes” are not used to define an exclusive set of elements or method steps. Rather, such words merely define a minimum set of elements or method steps included in a particular embodiment of the present invention. It will be appreciated that the invention may be implemented in a variety of ways, and that this ...

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Abstract

A system for determining structural changes in a longwall mine, including a modulator wheel operatively coupled to a longwall mining machine, and a controller in communication with the modulator wheel; wherein the controller determines a movement of the longwall mining machine according to a signal received from the modulator wheel.

Description

CROSS-REFERENCE TO RELATED APPLICATION(S)[0001]This application claims priority to and the benefit of Australian Patent Application No. 2012901236, filed on Mar. 27, 2012, the disclosure of which is incorporated herein in its entirety by reference.FIELD OF THE INVENTION[0002]This invention relates generally to a method and system for determining structural changes in a longwall mine, and in particular to a device for determining a position of a rock face of the longwall mine.BACKGROUND TO THE INVENTION[0003]A longwall mine is constructed by excavating two parallel tunnels, known as gate roads, leading into a material to be mined. A cross tunnel that connects the gate roads is then excavated in which a longwall mining machine is constructed. The length of the cross tunnel and hence the width of the longwall mining machine is typically between 150 m and 400 m.[0004]The longwall mining machine includes cutters or shearers which cut the material, such as coal, from a rock face. The mate...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): E21F17/18
CPCE21F17/18E21F17/02
Inventor MORRISON, CAMPBELL
Owner CUT COAL TECH HLDG
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