Investigations into the Buildup and Development Conditions of Coal Dust Explosions in a 700-m Underground Gallery

J Michelis; B Margenburg; G Müller; W Kleine

doi:10.1520/STP28170S

SYMPOSIA PAPER Published: 01 January 1987

STP28170S

Investigations into the Buildup and Development Conditions of Coal Dust Explosions in a 700-m Underground Gallery

Source

To investigate the buildup and development of coal dust explosions, comprehensive tests were carried out in a 8-m², 700-m-long explosion gallery at the Experimental Mine Tremonia. The majority of these tests were done with “Dortmund standard coal dust” (coking coal) with a mean particle size between 18 and 22 µm. The following test conditions were varied: length of the fuel zone, strength of primary initiation and secondary initiation, coal dust concentration, mean particle size of coal dust, and inert content of coal dust. The test results are discussed.

Author Information

Michelis, J

Versuchsgrubengesellschaft mbH (Tremonia Experimental Mine), Dortmund 1, Federal Republic of Germany

Margenburg, B

Versuchsgrubengesellschaft mbH (Tremonia Experimental Mine), Dortmund 1, Federal Republic of Germany

Müller, G

Versuchsgrubengesellschaft mbH (Tremonia Experimental Mine), Dortmund 1, Federal Republic of Germany

Kleine, W

Versuchsgrubengesellschaft mbH (Tremonia Experimental Mine), Dortmund 1, Federal Republic of Germany

Shipping & Handling

Domestic Shipping

Domestic orders are delivered via United Parcel Service (UPS) or United States Postal Service (USPS). Transit times average 3 to 5 business days. Please be aware that UPS will not deliver packages to Post Office Boxes.

Domestic Rush Orders

Please Contact Us.

International Standard Shipping

International orders are delivered via courier post services which can be either a postal service, courier service, or a combination of both. Standard Service is untraceable. Please allow 4-7 weeks for delivery.

International Expedited Shipping

Please Contact Us.

Please be aware that carriers will not deliver packages to Post Office Boxes. Because of the variability of customs processes and procedures in different countries, ASTM International cannot guarantee transit times to international destinations. Customs duty and taxes are the responsibility of the consignee.

Shipping & Handling charges follow the rate schedule, below:

Order Total	Shipping & Handling Fee (US Domestic)
Up to $50.00	$18.72
$50.01 to $100.00	$20.80
$100.01 to $150.00	$29.52
$150.01 to $250.00	$39.09
$250.01 to $500.00	$56.25
$500.01 to $750.00	$76.42
$750.01 to $1000.00	$93.15
$1000.01 to $1500.00	$121.27
$1500.01 to $2500.00	$158.38
$2500.01 to $4999.00	$209.04
$5000.00 to higher	FREE

Order Total	Shipping & Handling Fee (International)
Up to $50.00	$68.72
$50.01 to $100.00	$70.80
$100.01 to $150.00	$79.52
$150.01 to $250.00	$89.09
$250.01 to $500.00	$106.25
$500.01 to $750.00	$126.42
$750.01 to $1000.00	$143.15
$1000.01 to $1500.00	$171.27
$1500.01 to $2500.00	$208.38
$2500.01 to $4999.00	$259.04
$5000.00 to higher	FREE

Shipping and Handling charges are approximate. Additional charges may be incurred if your order requires multiple shipments. This does not apply to complete sets and sections.

Reprints and Permissions

Reprints and copyright permissions can be requested through the
Copyright Clearance Center

Details

Developed by Committee: E27

Pages: 124–137

DOI: 10.1520/STP28170S

ISBN-EB: 978-0-8031-5019-5

ISBN-13: 978-0-8031-0957-5

Investigations into the Buildup and Development Conditions of Coal Dust Explosions in a 700-m Underground Gallery

Author Information

Related

Reprints and Permissions

Details