Underground Mining Bolts and Support Systems Quiz

Types of Bolts and Support Systems in Underground Mining

• The video discusses the different types of bolts used in underground mining and the factors that determine their suitability.
• Factors include the presence of water, expected duration of fortification, criticality of operation, and properties of the rock.
• Different types of bolts include resin, cement, and expansion bolts that rely on friction with low contact loads.
• Anchor bolts are made of steel and are designed to stick to the rock mass using either resin or cement grout.
• The installation process involves inserting the resin cartridges, followed by the bolt, which is rotated to ensure a homogenous mix with the included catalyst.
• Limitations of using resin bolts include sensitivity to moisture and acidic drainage, limited durability of the resin, and potential danger of manipulating the resin.
• Cement grouted bolts have a longer lifespan than resin bolts but have lower adherence and work more slowly.
• Steel cables may be used for anchoring in situations where bolt length exceeds 6 meters.
• Friction bolts with high contact loads that are mechanically anchored include expansion bolts, which are complicated to install, have limitations, and cannot be used in hard rock or water.
• The four fundamental parts of an expansion head bolt are the bolt itself, the metal plate, the distribution plate, and the nut that anchors the bolt to the terrain.
• The versatility of bolts lies in the type of resin and cement used, but a mix between the two types of bolts is never recommended.
• It is important to carefully choose the appropriate bolts based on the equipment and rock conditions to ensure optimal support capabilities.

Test your knowledge on the different types of bolts and support systems used in underground mining with our quiz! Learn about the factors that determine the suitability of different types of bolts, including the presence of water, expected duration of fortification, criticality of operation, and properties of the rock. Test your understanding of resin, cement, and expansion bolts that rely on friction with low contact loads, as well as anchor bolts made of steel that stick to the rock mass using either resin or cement grout. Explore