What is the cut of the box?

Box cut serves as the first step in the excavation of most mining areas. It consists of a single rectangular cut made on the surface of the Earth and creates the shape of a box. Box cutting is used primarily for coal extraction, but can also be applied to other types of materials from metals to minerals. Depending on where these materials lie in relation to the Earth's surface, the box cut can be the only method of digging used on the project or may be the first of the many methods used.

In basic zone mining or surface, workers start using a dragline excavator to create a box along the entire length of the space. Earth and rocks removed from this cut are set aside above the ground for later reuse. The workers then enter the ditch created by a box cut and mine all available minerals and ore. Once the ditch is undressed, the soil and rocks are used to replenish the box. Workers can continue this process across the country, cut and fill one lane after the second -year -old onother.

Box cut can also be used for mining coal, located on a steep slope to the ground surface. During this process, workers begin to create a box deep enough to achieve coal. This box cut serves as an access point for deeper mining. For example, the shaft can be drilled from the inside of the moat to the base of the coal. Working from this type of ditch brings workers closer to the materials that are mining, and often leads to increased stability and soil safety compared to the work from the Earth's surface.

To support the trenches created by these cuts, workers rely on various shouting techniques. The rock screws are used to close the trench walls into the surrounding rock or soil, which helps to prevent caves. A wire network can be used to cover these walls to reduce the risk of a rock or dirt sliding on these workers below. In long -term mining projects B can bI will be covered with a sprayed well to ensure maximum strength and stability. In very deep boxes, the walls of the ditch must be eliminated to further reduce the risk.

Compared to other mining techniques, cutting boxes is relatively fast and easy. Unlike more complex methods, only a large excavator and basic supplies require. Before investing in other equipment, it also serves as an effective method of subsoil survey.

Despite many advantages, the mining of boxes is also associated with a number of potential risks or restrictions. Even on very shallow trenches, the caves could easily kill workers. To reduce this risk, and support must be used. Ventilation is also the main problem, especially when these trenches grow deeper and deeper.