The nuggets have two arrangements along the strike and the vertical. The thickness of the ore body is less than 20m and is arranged along the strike. At this time, the thickness of the ore body is the width of the mine; the thickness of the ore body is greater than 20m, and the vertical direction is arranged. At this time, the thickness of the ore body is the length of the mine. The length of the mine is determined according to the stability of the rock, and is generally 40 to 100 m. The height of the nugget is determined by the effective drilling depth of the rig and the accuracy that can be achieved, generally 40 to 60 m. When the ore body has been fully explored, the ore block should be divided from the bottom to the top. At this time, the rock drilling level of the next stage can be used as the level of the mine in the previous stage, and the top of the rocking roadway does not need to leave the top column. When the ore body has not been explored or for other reasons, it is only possible to divide the ore block from top to bottom. At this time, the bottom column of the lower stage of the previous stage should be 4 to 5 m, and the next stage of rock drilling roadway is at the bottom column. Excavation to ensure safe operation.
The structural parameters of the ore blocks of major mines at home and abroad are shown in Table 19-22.
Table 19-22 VCR method structure parameters
Mine name | Mine layout | Parameter (m) |
Mine height | Mine length | Mine width | Pull height |
Fankou lead zinc ore Jinchuan DIGGINGS Phoenix Mountain copper mine Dachang tin mine # 91 Levak Mine, Canada Canadian Centennial Mine Canadian birch mine Spanish Rubles Mine Almaden Mine, Spain American Ace Karan CIBC mine American Carfooke Mine | Vertical orientation Vertical orientation Along the way Along the way Along the way Along the way Along the way Vertical orientation Along the way Along the way Vertical orientation | 40 50 40 25~50 45 45 34 70 60 30.5 60 | 30~40 38~40 30 72 50 35 38 20~30 50~60 12 40 | 8~10 6~8 10 12 6 6 6~15 16~20 6~8 6 15~20 | 6~8 6 2.5 3 6 5 15 6 6 6 |
AAC Autoclave
Steam Autoclave,Aac Autoclave,Industrial Autoclave,Concrete Autoclave
Changzhou machinery and equipment Imp.& Exp.Co.,Ltd , https://www.czautoclave.com