Survey of Electromagnetic and Seismic Noise Related to Mine Rescue Communications. Volume II. Seismic Detection and Location of Isolated Miners.

摘要

Volume II of this report presents the findings of a short intensive assessment performed to provide the U.S. Bureau of Mines with independent technical judgements regarding the potentials and limitations of seismic methods and systems for: (1) detecting the presence of isolated signaling coal miners, (2) locating such miners to within the confines of a 600-by-600foot mine section,and (3) further locating these miners to within a 15-foot entry width. The results of this assessment were obtained by addressing the following major subject areas treated in this volume:the detection of seismic signals and the estimation of their arrival times,the location of the origin of seismic signals,seismic signal source and propagation characteristics,earth models,seismic noise characteristics,signal-to-noise ratio improvement techniques,coal mine operational and emergency environments,seismic detection and location instrumentation and its effective utilization during mine rescue operations. Experimental seismic data gathered by others during mine rescue field tests prior to this task and other relevant seismic data were fully utilized for the assessment reported in this volume.