Open-pit mining development method: multi-purpose road development, such as Liumao graphite mine, the annual output of ore is 244,000 tons, the annual mining and stripping total is 810,000 tons, the transport TATRA815 dump truck, the load is 15t; Nanshu Yueshi In the mining area, the annual output of ore is 243,000 tons, the annual total amount of stripping is 828,000 tons, and the ZG150 and BJ374 type dump trucks for transportation have load capacities of 15t and 20t respectively. Inner Mongolia Xinghe Graphite Mine, the annual output of ore is only 120,000 tons, the total annual mining and stripping is 370,000 tons, and 8t dump trucks for transportation. Development and transportation methods for underground mining: First, development of Pingshuo, such as Lutang graphite mine; second, development of inclined wells, such as meteorite graphite ore. Due to the small scale of mining, such as the annual output of meteorite graphite ore is only 20,000 tons, the 1.2m hoist for inclined shaft lifting, the manual cart for lane transportation, and the dump truck with 0.55m 3 for mining. 3Ply Face Masks,3 Ply Surgical Mask,3Ply Nonwoven Face Mask,3Ply Disposable Face Mask Jiangyin Huashi Medical Equipment Co.,Ltd , https://www.medicalwellcare.com
The division of the mine scale uses two methods: one is based on the amount of ore; the other is based on the amount of concentrate. See the table below. 
China's crystalline graphite ore deposits are prolific in regional metamorphic mid-deep metamorphic rocks. The ore body is layered, layered or lenticular, and the ore hardness is medium, and the fastening coefficient f=5-8 or f=8-10. The open pit mining process is the same as that of the general open pit mine. The Yueshi mining area of ​​the Liumao graphite mine and the Nanshu graphite mine are large open pit mines developed by roads. The working faces are arranged in parallel and vertical directions. The KQ-150 type is used for perforation. DTH drilling machine , 1m 3 , 2m 3 electric excavator for mining work, transportation vehicle for working face, car model selection and development of transportation.
Aphanitic prolific in contact metamorphic graphite mine coal metamorphic shale ore layered, laminar, lenticular and strip, earthy ore, soft, friable, creamy. The mining method of underground mining, Lutang graphite ore and vermiculite graphite ore, due to the poor stability of ore and surrounding rock, the use of caving mining method. Lutang graphite ore combines the characteristics of ore and surrounding rock. After years of practice, it has creatively adopted the sloping sublevel caving method without bottom pillar. It utilizes the characteristics of smoothness and small friction angle of ore in the mining and mining technology. All the roadways are made inclined. See the following figure. The inclination angle of the mine-boring well is 42°. The angle of the sub-section of the roadway is 7°-20° every 7m, and the inclination angle of the section inclined roadway is 18°-20°. The dip angle of the mining approach is 10°~11°. The enamel chute is laid on the bottom of the sectioned road, the sectioned inclined road and the mining road. The ore runs along the chute and slides into the mine. There is no other shipping equipment in the whole mining process. This method is generally bottomless. Compared with the column sublevel caving method, the equipment is simple, the shipping cost is saved, and it is easy to grasp. The production capacity of the ore block is 36t/d, and the working efficiency of the working face is 3.35 t/(work • class).
Graphite mining
China's crystalline graphite ore is open-pit mining, such as Liumao graphite mine, Nanshu graphite mine, Pingdu Liugezhuang graphite mine, Xinghe graphite mine and Hubei Sancha graphite mine. There are no examples of underground mining. Most of the cryptocrystalline graphite ore is underground mining, such as Lutang graphite mine and Jilin meteorite graphite mine.