High-resolution seismic reflection techniques for mapping coal seams from the surface. Technical progress report

High-resolution shallow seismic reflection methods are being used to map underground geologic features in coal mines. These features include faults, channel sands, washouts, rolls, and steep dips. The seismic method is proving useful for locating all of these at reasonable cost and with better definition than available with drill programs alone. This report provides a capsule description of the techniques and its application to mine planning. It is a brief synopsis of procedures developed and used by the Bureau of Mines over the past two years that can be applied with increasing usefulness by mining companies in the United States.