instrument to detect coal mine

SURFACE GEOPHYSICAL METHODS FOR DETECTION …

SURFACE GEOPHYSICAL METHODS FOR DETECTION OF UNDERGROUND MINE WORKINGS By William J. Johnson and Robert E. Snow – D’Appolonia, Monroeville, PA

Glossary of Mining Terms - Coal Education

A. Abutment - In coal mining, (1) the weight of the rocks above a narrow roadway is transferred to the solid coal along the sides, which act as abutments of the arch of strata spanning the roadway; and (2) the weight of the rocks over a longwall face is transferred to the front abutment, that is, the solid coal ahead of the face and the back abutment, that is, the settled packs behind the face.

Processing (Trace) | Institute of Mine Seismology

Processing (Trace) Overview. Trace provides tools to derive source parameters from the seismograms recorded by the IMS seismic system. The software is available for Windows and Linux. Interactive functionality includes the picking of phase arrivals in standard or hodogram modes, calculation of the location of earthquakes and source parameters derived from the spectra of seismic waves.

Glossary of Mining Terms - rocksandminerals.com

Abutment — In coal mining, (1) the weight of the rocks above a narrow roadway is transferred to the solid coal along the sides, which act as abutments of the arch of strata spanning the roadway; and (2) the weight of the rocks over a longwall face is transferred to the front abutment, that is, the solid coal ahead of the face and the back abutment, that is, the settled packs behind the face.

Davy lamp - Wikipedia

The Davy lamp is a safety lamp for use in flammable atmospheres, invented in 1815 by Sir Humphry Davy. It consists of a wick lamp with the flame enclosed inside a mesh screen. It was created for use in coal mines, to reduce the danger of explosions due to the presence of methane and other flammable gases, called firedamp or minedamp

Safety lamp - Wikipedia

A safety lamp is any of several types of lamp that provides illumination in coal mines and is designed to operate in air that may contain coal dust or gases both of which are potentially flammable or explosive. Until the development of effective electric lamps in the early 1900s miners used flame lamps to provide illumination. Open flame lamps could ignite flammable gases which collected in ...

Toxgard II Monitor - Adobe

1. Each instrument described in this manual must be installed, operated and maintained in strict accordance with its labels, cautions, warnings, instructions, and within the limitations stated.

Displacement MonitoringDisplacement Monitoring

APPLICATIONS The exto reader readout unit is a portable device used to read all types of potentiometer based sensors. It is designed to measure in millimetres and is particularly useful with ES&S or Geosystems displacement monitoring range.

Hazardous and Solid Waste Management System; Disposal …

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Dictionary - Survey, Boundary, Mapping, Mining - Elliott ...

Glossary-Dictionary of terms related to professional surveying, geomatics.. These terms are defined in accordance with their meaning and usage within the surveying profession. Many of these terms are defined using slang or historical definitions.

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