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Factors affecting the location of methanometers on mining equipment.

Authors
Taylor-CD; Thimons-ED; Zimmer-JA
Source
Proceedings of the Seventh International Mine Ventilation Congress, June 17-22, 2001, Crakow, Poland. S Wasilewski, ed., Crakow, Poland: Research & Development Center for Electrical Engineering and Automation in Mining (EMAG), 2001 Jun; :683-688
Link
NIOSHTIC No.
20023627
Abstract
The U.S. Code of Federal Regulations (Title 30) requires that a methane monitor be placed on every mining machine to continuously observe and record methane levels at the face. The monitor must provide a warning whenever methane levels are 1.0 percent or higher. An effective monitoring system will indicate a methane concentration of 1.0 percent on the mining machine before methane levels at the mining face reach 5.0 percent. Where the methane monitor is located on the mining machine is one of the most important factors that determines how effectively face methane levels can be predicted. Any change in the sampling location will result in a change in measured methane concentration. To protect the methanometer, it is usually located on the cutting boom at least 1 to 1.8 m (3 to 6 ft) outby the front cutting bits. A face ventilation system using blowing tubing was simulated in a full-scale test facility. Methane released from the face area was monitored at multiple locations on a model mining machine as well as locations near the face. Based on the relationship between concentrations measured on the machine and at the face, criteria were developed for selecting the best machine locations for monitoring methane. Recommendations are given for revising methane action levels for alternative sampling locations.
Keywords
Methanes; Mining-equipment; Underground-mining; Methane-sampling; Ventilation; Monitoring-systems; Ventilation-systems
Contact
NIOSH, Pittsburgh Research Laboratory, P.O. Box 18070, Pittsburgh, PA 15236
CAS No.
74-82-8
Publication Date
20010617
Document Type
Conference/Symposia Proceedings; Book or book chapter
Editors
Wasilewski-S
Fiscal Year
2001
NTIS Accession No.
NTIS Price
ISBN No.
8391310914
NIOSH Division
PRL
Source Name
Proceedings of the Seventh International Mine Ventilation Congress, June 17-22, 2001, Crakow, Poland
State
PA
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