rock bolt A form of support for broken or jointed rock in mines or excavations. The far ends of metal bolts are secured in solid rock, with a face plate and nut at the external end. Rock bolts are usually used in conjunction with steel roof bars, plates, and mesh, combined with grouting.
More From encyclopedia.com
Iron Ores , Rocks Rocks are composed of minerals, which are natural inorganic (nonliving) substances with specific chemical compositions and structures. A rock m… Rock , rock1 / räk/ • n. 1. the solid mineral material forming part of the surface of the earth and other similar planets, exposed on the surface or underly… Igneous Rocks , Igneous rocks are formed by the cooling and hardening of molten magma. The word igneous comes from the Latin word igneus, meaning fire, and there are… Country Rock , Country rock The term country rock refers to a body of rock that receives or hosts an intrusion of a viscous geologic material. Intrusions into count… Metamorphic Rocks , Metamorphic rock is rock that has changed from one type of rock into another. The word metamorphic (from Greek) means “of changing form.” Metamorphic… Trachyte , trachyte Fine-grained volcanic rock of the alkaline series of intermediate rocks. Trachyte is the volcanic equivalent of syenite. trachyte gritty vol…
About this article
Updated About encyclopedia.com content Print Article
You Might Also Like