ROCK BOLT Meaning and
Definition
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A rock bolt is a type of reinforcement used in geotechnical engineering to stabilize rock or soil. It consists of a long, threaded steel rod that is installed into drilled holes in the rock or soil. The rod is typically between 2 to 6 meters in length, although it can be customized based on the specific requirements of the project.
Rock bolts are commonly used in mining, tunneling, and slope stabilization applications. The installation process involves drilling a hole into the rock or soil, inserting the rock bolt, and then grouting the hole with a cementitious material, such as a resin or grout, to anchor the bolt in place. The grout also helps to improve the load transfer between the bolt and the surrounding rock or soil.
The purpose of using a rock bolt is to provide additional support and reinforcement to prevent the rock or soil from collapsing or shifting. By anchoring the rock or soil together, rock bolts improve the stability and strength of the ground, ensuring the safety of structures and workers in the vicinity. They can also be used to control ground movement, redistribute loads, and prevent rockbursts or rockfalls.
Rock bolts come in various types and designs, such as fully threaded, partially threaded, grouted or non-grouted, depending on the specific project requirements. The choice of rock bolt type depends on factors like the strength of the rock or soil, the expected loads, and the geological conditions. Regular inspection and maintenance of rock bolts are essential to ensure their long-term effectiveness in stabilizing the ground.
Etymology of ROCK BOLT
The term "rock bolt" originates from the combination of the words "rock" and "bolt".
The word "rock" comes from the Old English word "rocc", which means a large detached piece of stone, while its origins can be traced back to the Proto-Germanic word "rekkōną" meaning "to stretch out". It is also related to the Old Norse word "hrǫkkva", meaning "to bend".
The word "bolt" has its roots in the Old English word "bolt", which refers to a short, heavy arrow used for hunting or shooting. Its etymology can be traced back to the Proto-Germanic word "bulgiz", meaning "to swell" or "to boil". This sense relates to the projectile-like nature of bolts.
