(1) A steeply inclined ore body with an ore body thickness greater than 10 to 15 m and a thicker ore body of any dip angle are available. (2) Nuggets with no natural tendency to collapse above medium hardness. (3) The stability of the surrounding rock of the upper and lower plates should ensure that the depletion is not caused by the early collapse when the compensation space is opened. For extremely thick ore bodies, any stable surrounding rock can be used. (4) The ore is non-caking and self-igniting. (5) The surface is allowed to collapse. Overall, the stage collapse method is suitable for mining low-grade thick ore bodies. Welded Wire Mesh,Weld Mesh,Welded Wire,Welded Wire Fence ANPING HANKE FILTER TECHNOLOGY CO , https://www.anpinghankefilter.com
According to the different methods of mining, it can be divided into two categories: the stage natural caving method and the stage forced caving method. Due to the strict requirements of geological conditions in the stage natural caving method, China has not yet been promoted and applied.