Grade control refers to ore grades and blocks of the pit in the mining industry. It provides information about mine blasting and planning. This information is needed to minimize waste rock in concentrator feed. Reverse circulation drilling method is preferred for grade control drilling Kalgoorlie mining operations of open pits. It is an accurate and economical way to indicate boundaries between the ore bodies and waste rock. Specially designed rigs are needed to ensure high quality and safe samples from the grade controlling program.
The drilling and sampling equipment is designed to deliver the most accurate and cleanest samples possible. The reliable and accurate sample data is necessary to achieve optimum operational capability of a mine. Additional services include RC, exploration and surveying are available. All these services are provided by a professional team that knows how to do its job. Both RC and blast hole techniques have their own advantages. Air based drilling technique improves the grading control and prevents sampling issues like refluxing of material, pile segregation, inconsistent sample and upward contamination.