Skip directly to search Skip directly to A to Z list Skip directly to page options Skip directly to site content

NIOSHTIC-2 Publications Search

Search Results

A CART technique to adjust production from longwall coal operations under ventilation constraints.

Authors
Karacan-C; Goodman-GVR
Source
Saf Sci 2012 Mar; 50(3):510-522
NIOSHTIC No.
20040133
Abstract
Methane emissions in longwall coal mines can arise from a variety of geologic and production factors, where ventilation and degasification are primary control measures to prevent excessive methane levels. However, poor ventilation practices or inadequate ventilation may result in accumulation of dangerous methane-air mixtures. The need exists for a set of rules and a model to be used as guidelines to adjust coal production according to expected methane emissions and current ventilation conditions. In this paper, hierarchical classification and regression tree (CART) analyses are performed as nonparametric modeling efforts to predict methane emissions that can arise during extraction of a longwall panel. These emissions are predicted for a range of coal productivities while considering specific operational, panel design and geologic parameters such as gas content, proximate composition of coal, seam height, panel width, cut height, cut depth, and panel size. Analyses are conducted for longwall mines with and without degasification of the longwall panel. These models define a range of coal productivities that can be achieved without exceeding specified emissions rates under given operating and geological conditions. Finally, the technique was applied to longwall mines that operate with and without degasification system to demonstrate its use and predictive capability. The predicted results proved to be close to the actual measurements to estimate ventilation requirements. Thus, the CART-based model that is given in this paper can be used to predict methane emission rates and to adjust operation parameters under ventilation constrains in longwall mining.
Keywords
Mining-industry; Coal-mining; Underground-mining; Gases; Mine-gases; Methanes; Longwall-mining; Ventilation; Ventilation-systems; Control-methods; Control-systems; Gas-mixtures; Mathematical-models; Geology; Coal-gasification; Measurement-equipment; Analytical-models; Analytical-instruments; Emission-sources; Air-contamination; Air-quality; Models; Mine-gases; Exposure-levels; Exposure-limits; Author Keywords: Mining safety; Coal mine methane; Methane emissions; Longwall mines; CART analyses
Contact
C.. Karacan, National Institute of Occupational Safety and Health (NIOSH), Office of Mine Safety and Health Research (OMSHR), Dust Control, Ventilation, and Toxic Substances Branch, Pittsburgh, PA 15236, USA
CODEN
SSCIEO
CAS No.
74-82-8
Publication Date
20120301
Document Type
Journal Article
Email Address
cok6@cdc.gov
Fiscal Year
2012
NTIS Accession No.
NTIS Price
Identifying No.
B01182012
Issue of Publication
3
ISSN
0925-7535
NIOSH Division
OMSHR
Priority Area
Mining
Source Name
Safety Science
State
PA
TOP