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Mining Publication: Borehole Location System Concept Demonstration Tests
Keywords: Boreholes California New Mexico Tunnels
This page is archived for historical purposes and is no longer being maintained or updated. Contact NIOSH Mining if you need an accessible version.
Original creation date: September 1978
Authors: TC Moore, LH Rorden, C Kwong
Contract/MOA Report - September 1978
Download PDF Document (4.71 MB)
NIOSHTIC2 Number: 10002310
Develco, Inc. U.S. Department of the Interior, Bureau of Mines, Contract No. J0177074. 1978; :1-69
This report describes the feasibility test of an electromagnetic method for locating boreholes, with or without casing, that have been drilled in conjunction with mining operations but without precisely known locations with respect to the tunnel. The first tests, conducted in cooperation with the Kerr-McGee Corp. near Gallup, new Mexico, in September 1977, demonstrated that accuracies of better than +/-5 pct of range and +/-1 deg. of bearing can be achieved with a simple system and setup. Subsequent tests on a horizontally drilled pipeline river crossing application, by Titan Contractors of Sacramento, California, in January 1978, demonstrated that accuracies of better than 0.5 pct of range and a few tenths of 1 deg. of bearing can be achieved by using refined techniques. The demonstration tests were done at ranges on the order of 100 to 200 feet, but the method is capable of working at much greater distances.
Image of publication Borehole Location System Concept Demonstration TestsContract/MOA Report - September 1978
Download PDF Document (4.71 MB)
NIOSHTIC2 Number: 10002310
Develco, Inc. U.S. Department of the Interior, Bureau of Mines, Contract No. J0177074. 1978; :1-69
See Also
Cableless Electronic Surveying Systems for Horizontal Holes
Comparison of Rotary and In-Hole Motor Techniques for Drilling Horizontal Boreholes in Coal
Correlation of Sonic Travel Time to the Uniaxial Compressive Strength of U.S. Coal Measure Rocks
The Critical Ventilation Velocity in Tunnel Fires - A Computer Simulation
Demonstration of Remote Mine Seal Construction
Detecting Strata Fracturing and Roof Failures from a Borehole Based Microseismic System
Effects of Stimulation Treatments on Coalbeds and Surrounding Strata: Evidence from Underground Observations
Propagation of UHF Radio Waves in Limestone Room and Pillar Mines
Straight Line Walking and Path-Turn Identifying Algorithms for a Tracking Device Used in Underground Mines
Use of Vertical Boreholes for Assisting Ventilation of Longwall Gob Areas
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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