There are three different mining methods that are commonly used in underground mines in South Africa. The most common technique is the 'bord and pillar' method, which accounts for just under half of total coal production (SACRM, 2011). This method is ideal for relatively shallow deposits where overlying rock .
Mar 01, 2010· The typical price for a new machine in the 40ton category prices ranges from around 500,000 to 670,000. Keep in mind this is the suggested list price. Consult a dealer for an actual quote. The value of a tradein machine, or a package deal involving additional machines may have an .