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open access

24-Channel Geophone Array for Horizontal or Vertical Boreholes Quarterly Report: April-June 2001

Description: This report describes the technical progress on a project to design and construct a multi-channel geophone array that improves tomographic imaging capabilities in both surface and underground mines. Especially important in the design of the array is sensor placement. One issue related to sensor placement is addressed in this report: the method of emplacing the array in a long, horizontal borehole. Improved imaging capabilities will produce energy, environmental, and economic benefits by increas… more
Date: July 2002
Creator: Westman, Erik C.
open access

24-Channel Geophone Array for Horizontal or Vertical Boreholes Quarterly Report: December 2000 - March 2001

Description: This report describes the technical progress on a project to design and construct a multi-channel geophone array that improves tomographic imaging capabilities in both surface and underground mines. Especially important in the design of the array is sensor placement. One issue related to sensor placement is addressed in this report: the development of simple, robust, MSHA-acceptable clamping unit. Improved imaging capabilities will produce energy, environmental, and economic benefits by increas… more
Date: July 2002
Creator: Westman, Erik C.
open access

24-Channel Geophone Array for Horizontal or Vertical Boreholes Quarterly Report: July-September 2001

Description: This report describes the technical progress on a project to design and construct a multi-channel geophone array that improves tomographic imaging capabilities in both surface and underground mines. Especially important in the design of the array is sensor placement. One issue related to sensor placement is addressed in this report: the method for orienting the sensor once it is emplaced in the borehole. If the sensors (geophones) do not have the same orientation, the data will be essentially w… more
Date: July 2002
Creator: Westman, Erik C.
open access

24-Channel Geophone Array for Horizontal or Vertical Boreholes Quarterly Report: October-December 2001

Description: This report describes the technical progress on a project to design and construct a multi-channel geophone array that improves tomographic imaging capabilities in both surface and underground mines. Especially important in the design of the array is sensor placement. One issue related to sensor placement is addressed in this report: the method for clamping the sensor once it is emplaced in the borehole. If the sensors (geophones) are not adequately coupled to the surrounding rock mass, the resu… more
Date: July 2002
Creator: Westman, Erik C.
open access

24-Channel Geophone Array for Horizontal or Vertical Boreholes Quarterly Technical Report: April-June 2003

Description: This report describes the technical progress on a project to design and construct a multichannel geophone array that improves tomographic imaging capabilities in both surface and underground mines. No work was completed during this reporting period as project personnel are waiting for the mine to become available for final field testing of the array. Improved imaging capabilities will produce energy, environmental, and economic benefits by increasing exploration accuracy and reducing operating … more
Date: July 2003
Creator: Westman, Erik C.
open access

24-Channel Geophone Array for Horizontal or Vertical Boreholes Quarterly Technical Report: January-March 2003

Description: This report describes the technical progress on a project to design and construct a multichannel geophone array that improves tomographic imaging capabilities in both surface and underground mines. Especially important in the design of the array is sensor placement. One issue related to sensor placement is addressed in this report: the method for clamping the sensor once it is emplaced in the borehole. If the sensors (geophones) are not adequately coupled to the surrounding rock mass, the resul… more
Date: June 2003
Creator: Westman, Erik C.
open access

24-Channel Geophone Array for Horizontal or Vertical Boreholes Quarterly Technical Report: July-September 2002

Description: This report describes the technical progress on a project to design and construct a multichannel geophone array that improves tomographic imaging capabilities in both surface and underground mines. Especially important in the design of the array is sensor placement. One issue related to sensor placement is addressed in this report: the method for clamping the sensor once it is emplaced in the borehole. If the sensors (geophones) are not adequately coupled to the surrounding rock mass, the resul… more
Date: January 2003
Creator: Westman, Erik C.
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