Systems and methods for monitoring longwall mine roof stability

A roof and longwall technology, which is applied in mine roof support, mining equipment, earth square drilling and mining, etc., can solve the problems of mining equipment workers' dangers, etc.

Inactive Publication Date: 2018-03-27
JOY GLOBAL UNDERGROUND MINING LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the loads placed on the PRS by the weight of the mine roof before the mine roof collapses can create a potentially hazardous condition for mining equipment as well as workers within the mine

Method used

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  • Systems and methods for monitoring longwall mine roof stability
  • Systems and methods for monitoring longwall mine roof stability
  • Systems and methods for monitoring longwall mine roof stability

Examples

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Embodiment Construction

[0030] Before any embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in application to the details of construction and arrangement of components set forth in the following description or shown in the following drawings. The invention is capable of other embodiments and of being practiced or carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein are for the purpose of description and should not be regarded as limiting. The use of "including," "comprising," or "having" and variations thereof herein is meant to encompass the items listed thereafter and their equivalents as well as additional items. The terms "mounted", "connected" and "coupled" are used broadly and include both direct and indirect mountings, connections and couplings. Furthermore, "connected" and "coupled" are not limited to physical or mechanical connections or couplings, and may include direct or ind...

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Abstract

Systems and methods are described for monitoring a condition of a mine roof using a longwall mining system. A plurality of powered roof supports are controlled to apply an adjustable support pressureon a mine roof. A condition of the mine roof is monitored based on the adjustable support pressure applied to the roof by a respective actuator of each powered roof support. In some implementations, the condition of the mine roof is monitored by generating and analyzing a graphical pressure map based on the adjustable support pressure applied by each powered roof support and a relative position ofa shearer moving across the mine face. In some implementations, roof collapse events are detected based on temporally similar changes in the adjustable support pressure applied by multiple adjacent powered roof supports as indicated by the graphical pressure map.

Description

[0001] Cross-References to Associated Applications [0002] This application claims the benefit of US Provisional Patent Application No. 62 / 175,691, filed June 15, 2015, the entire contents of which are incorporated herein by reference. Background technique [0003] Embodiments of the present invention relate to systems and methods for monitoring roof stability in an underground longwall mining environment. Powered Roof Supports (PRS) support the mine roof above the shearer as the longwall mining system's shearer moves back and forth along the length of the machine. As the mining system moved forward into the coal seam, the mine roof failed and collapsed behind the powered roof supports. However, the load imposed on the PRS by the weight of the mine roof before the mine roof collapses could create a potentially hazardous situation for mining equipment as well as for workers within the mine. Contents of the invention [0004] Various embodiments of the present invention pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D23/00E21C27/00
CPCE21C35/12E21D23/26E21F17/185
Inventor J·克努特
Owner JOY GLOBAL UNDERGROUND MINING LLC
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