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Ensuring working conditions along a longwall face

A long wall and wall technology, which is applied in mine/tunnel ventilation, instruments, dust prevention, etc., and can solve problems such as methane gas explosion

Inactive Publication Date: 2015-12-09
CATERPILLER GLOBAL MINING EURO GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Released methane gas presents a risk of methane gas explosion

Method used

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  • Ensuring working conditions along a longwall face
  • Ensuring working conditions along a longwall face

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Embodiment Construction

[0012] The following is a detailed description of exemplary embodiments of the present invention. The exemplary embodiments described herein and illustrated in the accompanying drawings are intended to teach the principles of the invention and enable those skilled in the art to implement and use the invention in various environments and for various applications. Therefore, the exemplary embodiments are not intended and should not be considered as a limiting description of the scope of patent protection. Rather, the scope of patent protection shall be defined by the appended claims.

[0013] The present invention is based in part on the recognition that in longwall mining, conventional ventilation systems may not be sufficient to dilute and direct released methane gas away from the longwall. For example, if ventilation is increased, as the working conditions for man and machine are reduced, if thin coal seams are mined, areas with smaller cross-sections can restrict ventilatio...

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Abstract

The present disclosure relates to a method and device for ensuring working conditions along a longwall face of a longwall mine. A longwall installation unit (5; 16) configured to form a longwall installation assembly (4; 17) together with a plurality of longwall installation units (5; 16) of the same kind may comprise a dilution gas nozzle (30, 30') installed in the longwall installation unit (5; 16) and configured to be fluidly connected to a compressor device. Dilution gas provided by dilution gas nozzle (30) may locally dilute methane gas, for example, in response to a measured methane gas concentration or concentration trend, and thereby ensure working conditions for man and machine.

Description

technical field [0001] The present invention relates to a method and a device for ensuring working conditions, and in particular to a method and a device for ensuring working conditions along long walls in underground mines. Background technique [0002] A well known problem in longwall mining of coal seams is the emission of methane gas. Emissions of methane gas come from both the natural outflow of the gas during the coal mining process and the generation of both. Capillary-bound methane gas is released from the coal as the extractor cuts along the coal seam. Released methane gas presents a risk of methane gas explosion. [0003] Typically, mine ventilation allows gas concentrations to be at acceptable levels. For example, ventilation provides air from the intake side, directs air along the longwall, and releases air on the exhaust side, thereby carrying with it any released methane gas. [0004] Safety regulations, however, require continuous measurement of methane ga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00E21F5/02E21C27/02E21C35/24
CPCE21C27/02E21C35/24E21F5/02E21D23/0004E21F1/006
Inventor R·舒斯特
Owner CATERPILLER GLOBAL MINING EURO GMBH