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Mining Publication: Accuracy and Precision of Microseismic Event Locations in Rock Burst Research Studies
Keywords: Bumps Seismic methods
Original creation date: January 1992
Authors: PL Swanson, LH Estey, FM Boler, S Billington
Report of Investigations - January 1992
Download PDF Document (3.93 MB)
NIOSHTIC2 Number: 10011113
Denver, CO: U.S. Department of the Interior, Bureau of Mines, RI 9395, 1992 Jan; :1-40
Stability analyses of fractured and faulted rock masses require delineation of the position, extent, and orientation of geologic discontinuities. The size of the smallest active discontinuity that may potentially be resolved using the spatial distribution of microseismic event locations is limited by the accuracy and precision of the location methods. At a hard-rock mine in Coeur d'Alene mining district of northern Idaho, two data sets consisting of calibration blast signals from a known source site and origin time and microseismic event signals were recorded using a stope-wide accelerometer array. These seismic signals are used to quantify various sources of error in event location. Five factors influencing source location errors are examined in this U.S. Bureau of Mines study: (1) biases of the numerical source location techniques, (2) receiver array geometries, (3) uncertainties in receiver positions, (4) errors in picking arrival times, and (5) uncertainties in seismic velocity structure, including the effect of mine openings. In addition, synthetic data (accelerometer positions, travel-time picks, and wave velocity) are used to determine the effect of known systematic and random errors on source location calculations. It is shown that the commonly accepted association of minimum travel-time residuals with the best location solution does not necessarily hold true when there is a systematic error in seismic velocity. Recommendations are made for increasing the accuracy and precision of locations of microseismic events detected under similar field conditions.
Image of publication Accuracy and Precision of Microseismic Event Locations in Rock Burst Research StudiesReport of Investigations - January 1992
Download PDF Document (3.93 MB)
NIOSHTIC2 Number: 10011113
Denver, CO: U.S. Department of the Interior, Bureau of Mines, RI 9395, 1992 Jan; :1-40
See Also
60 Years of Rockbursting in the Coeur D'Alene District of Northern Idaho, USA: Lessons Learned and Remaining Issues
Behavior of a Coal Pillar Prone to Burst in the Southern Appalachian Basin of the United States
Coal Bumps and Odd Dynamic Phenomena - A Numerical Investigation
Deep Cover Pillar Recovery in the US
Development of a Statistical-Analytical Approach for Assessing Coal Bump Potential
Development of an Automated PC-Network-Based Seismic Monitoring System
Diagnosing and Controlling Moisture-Sensitive Roof in Coal Mines
Dynamic Failure in Deep Coal: Recent Trends and a Path Forward
Rock Mechanics Investigations at the Lucky Friday Mine (In Three Parts): 1. Instrumentation of an Experimental Underhand Longwall Stope
Work Practices to Manage Bump Prone Ground
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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