About SISMA Drilling

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Explosives, such as dynamite, can be used as crude but effective sources of seismic energy.  The explosive charges are placed between 3 and 30 metres below ground, in a hole that is drilled with dedicated drilling equipment for this purpose. This type of seismic drilling is often referred to as "Shot Hole Drilling". A common drill rig used for "Shot Hole Drilling" is the L.I.S (Low Impact Seismic) mounted on track carrier for operation in cut lines or environmentally sensitive area. Truck mounted drill or 4X4 buggy are utilized in the prairies. These drill rigs use water or air to assist the drilling.

Geotechnical Drilling and sampling of soils and bedrock provides information about the

formation and stabiltiy characteristics vital to the construction industry. By studying these

characteristics along with ground water and bedrock mapping it allows the process of

construction to be carried out in the best manner with no suprises.

A 2' split spoon is the most effective method of retrieving a sample of soil, though use of a sand trap is needed in sand formations and shelby tubes are used to extract soft clays with little or no SPT value. When rock coring, an inner tube, seated at the bottom of the drill string is extracted to obtain the core sample needed.

Standard penetration testing (SPT) is done with the use of our automatic hammer, which drives a split spoon or a dynamic cone point(cone penetration testing) into the soil at a certain drop rate and weight. The amount of times driven into the soil within certain measurements provides the data needed to caculate soil strength. Shear tests are done with field veins in soft clays to determine shear strength if low SPT value is shown. 

Environmental drilling & sampling is generally done for environmental assesments of commercial, government, and residental properties. By drilling through the soils and/or through the desired water table(s), environmental investigations of the soil and water can be done to determine the presence and/or concentration of contaminants in the water table.