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Mining Publication: A CART Technique to Adjust Production from Longwall Coal Operations under Ventilation Constraints
Keywords: Coal mining Degasification Emission controls Longwall mining Methane 
 Modeling
Original creation date: March 2012
Authors: C� Karacan, GV Goodman
Peer Reviewed Journal Article - March 2012
Download PDF Document (1.24 MB)
NIOSHTIC2 Number: 20040133
Saf Sci 2012 Mar; 50(3):510-522
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.
Image of publication A CART Technique to Adjust Production from Longwall Coal Operations under Ventilation ConstraintsPeer Reviewed Journal Article - March 2012
Download PDF Document (1.24 MB)
NIOSHTIC2 Number: 20040133
Saf Sci 2012 Mar; 50(3):510-522
See Also
Coal Bed Discontinuity Effects on the Production of Degasification Boreholes and on Emissions During Longwall Mining
Coal Mine Methane: A Review of Capture and Utilization Practices with Benefits to Mining Safety and to Greenhouse Gas Reduction
Degasification System Selection for U.S. Longwall Mines Using an Expert Classification System
Forecasting Gob Gas Venthole Production Performances Using Intelligent Computing Methods for Optimum Methane Control in Longwall Coal Mines
Historical Development of Technologies for Controlling Methane in Underground Coal Mines
Methane Control by Isolation of a Major Coal Panel - Pittsburgh Coalbed
Methane Drainage and Migration
Reservoir Engineering Considerations for Coal Seam Degasification and Methane Control in Underground Mines
Reservoir Modeling-Based Prediction and Optimization of Ventilation Requirements During Development Mining in Underground Coal Mines
Rotary Drilling Techniques Used in the Beckley Coalbed
Page last reviewed: September 21, 2012
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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