Mining Accuracy: Understanding Borehole Surveys

Borehole SurveysWhen locating underground water sources for wells and water pumps, contractors need to be sure where and how deep they need to dig. This is where boreholes come in. These deep, narrow holes are what contractors use to locate water in the ground and survey its surroundings to know if it’s safe to start excavations around it.

Why Do You Need to Survey

A borehole survey helps remove the doubts of contractors by identifying what path the borehole took and where it ended. This is because holes may deviate or curve away from a straight line when digging. The reason for this deviation differs, but the land or rock type and drill rod, rig type and technique are the most common causes.

The Food and Agriculture Organization of the United Nations (FAO) and Axis Mining Technology both agree that surveying before performing any excavating work is important. This helps generate a 3D locational path that contractors need for future processes, such as drill, reserve and financial planning.

How Borehole Surveying Works

Boreholes survey results provide important information, like soil condition, contamination, physical and chemical properties of land, and presence of natural cavities or minerals. These help contractors identify the geology and nature of the ground, whether there’s a potential hazard for their excavation projects or not.

When surveying a borehole, contractors move a probe inside the narrow hole they made and sense its movement to different frames of reference. Some of the methods they use for drilling are a hand auger, lorry-mounted small scale rotary drilling, hammer air flush and offshore drilling, and large rigs on either onshore and offshore platforms.

Borehole surveying is among the most effective ways to make sure that the ground contains what contractors are looking for, like water. As its results may affect the quality of your project, it’s best to hire the right people and use the best tools possible.