Large long wall base of pressure
Long wall mining has become most common method of underground coal mining, because it improves the productivity, reduces production costs and provides a safe working environment for all miners. Long wall mining is a type of underground coal mining in which a part of longwall face consisting of coal panel is extracted in a large continuous operation.
The base of large long wall with is known as long wall base of pressure or large long wall base of pressure. It is basically a large steel plate which lies at the base of the longwall coal panel and supports the weight of the entire panel. It also absorbs any pressure associated with the panel. The bottom plate is made up of high tensile steel sheets, which are heat treated and bonded to form a powerful bond.
Large long wall base of pressure consists of several layers of steel plates that are steel-welded together and connected with a steel-welded frame. Typically, at least four layers of steel plates are used and the size varies depending on the requirements of the particular mine. The plates are connected by either a riveted or bolt-on connection and the connections are made in such a way so as to prevent any misalignment of the plates. The plates are also reinforced with a steel reinforcing bar, which is usually made of iron or steel.
The main purpose of a large long wall base of pressure is to provide support to the longwall coal panel, and also to protect it from the pressure of the surrounding rock strata. It is also designed to reduce the amount of misalignment of the plate which can lead to excessive strain on the panel.
The large long wall base of pressure is usually installed in the longwall panels to provide an even pressure distribution on the panel. This helps to reduce the amount of stress that is applied to the panel and to ensure that the panel is not subjected to too much pressure in any part of it.
The installation process of a large long wall base of pressure is a complicated one and it requires the use of specialized equipment. The installation is done by a team of experienced professionals who are familiar with the process. Usually, the installation is done using several layers of steel plates, welding, reinforcing and other tools. The installation process will also involve the use of additional tools, such as a heat shield, to protect the plates from fire and heat.
Once the large long wall base of pressure is installed, it should be checked for any signs of misalignment or any damage that might have occurred to the plates. It is important to ensure that all the necessary repairs are done before the panel is used. If any problems are detected, the panel should be inspected by a qualified engineer so that the repairs can be done.
