Mining method Dig a series of roadways from the ground to reach the ore body, in order to transport the ore that will be produced underground to the ground, while sending fresh air into the underground dirty air to discharge the surface, discharge the pit water to the surface, and send personnel, materials and equipment. Entering the ground and transporting the land to form an ascension, A complete system of transportation, ventilation, drainage, and power supply is called mining. Shaft development When the ore body is assigned to the ground below, the ore body inclination angle is 45, or 15, and the deeper ore body is often used. (1)) Development of the lower shaft The shaft is drilled outside the rock movement belt of the ore body, and the stone gate reaches the vein. This method of mining the metal most widely used. Advantages: The wellbore protection conditions are good, there is no need to leave a security pillar, and the ore body inclination angle is more than 75. Disadvantages: The length of the stone gate increases as the depth of mining increases. The shaft is drilled outside the rock-moving belt on the ore body, and the Shimen Tongda ore body is drilled again. This method of development has serious shortcomings compared with the development of the lower shaft. Mainly in the upper stage, it is necessary to dig a long stone gate, which has a long infrastructure and a large investment in the initial stage of infrastructure construction. (3) flank shaft development The wellbore is placed on the side of the ore body. This method of development can only be one-way, and the speed of excavation is limited. Hot Rolled Seamless Steel Tube Hot Rolled Seamless Steel Tube,Hot Rolled Steel Pipes,Hot Rolled Galvanized Steel Pipe,Hot Rolled Seamless Galvanized Steel Pipe Shandong Panhua Metal Material Co. LTD , https://www.cnyzsteel.com
(2) Open up the shaft