When the mixed method is used to mine high-step granite, the process flow is as follows: Select the location of the large volume separation body and determine its geometric dimensions - Drill horizontal and vertical through holes on one or both sides of the separation body - Install the diamond wire saw - Saw the connection surface of the separation body and the ore body - Drill the separation body Row holes on the connection surface with the ore body - double-sided or single-sided controlled blasting to separate the separated body from the ore body - the disintegration of the separated body. Acceptance - displacement, hoisting and transportation of blocks. There are three options for sawing the connection surface between the separation body and the ore body: Option 1 is to only saw the vertical end face of the connection between the rectangular separation body and the ore body, and drill rows of holes on the vertical back and horizontal plane where the separation body and the ore body are connected. , and then use double-sided controlled blasting to separate the separation body from the ore body; Option 2 is to cut and separate the horizontal bottom surface and the vertical end face of the separation body and the ore body. The cutting sequence is horizontal first and then vertical. Drill holes on the vertical back surface where the separation body and the ore body are connected, and then use single-sided control blasting. Separating body from ore body; Option 3 is to use a wire saw machine to cut and separate all the three surfaces connecting the separating body and the ore body. At this time, the separating body and the ore body have been separated, and the blasting operation is no longer required. The choice of the three schemes depends on the development of ore body fissures, the block rate of the ore body, the size and volume of the high step separation body, the size of the cutting surface and other factors.
