What are the types of support for coal mine roadway?

The support methods for underground coal mine roadways include: anchor support, anchor anchor network support, anchor beam support, anchor network support, anchor anchor slurry support, vegetative slurry support, swan stone arch support, cast-in-place reinforced concrete support, U-beam support, I-beam three-section support, bare support (no support material is added to the roadway after it is shaped), and these are the main methods and types of roadway support used in coal mines at the present time.

The coal mine roadway is divided into the development roadway, preparation roadway and mining roadway, as well as a variety of mechanical and electrical refuge, equipment refuge, sheltered refuge, and so on. The geographic location and role of the various roadways and chambers determines the type and type of support. For example, the service life of an open roadway is basically the service life of a coal mine, and it is the longest service life. Therefore, the support and the choice of the rock in which to dig are the primary considerations in order to maintain the safety of the roadway, as well as the maintenance and passability of the roadway. The net section of this kind of roadway is larger, because it is belongs to the main traffic and ventilation roadway. At the same time, the roadway to take the support method is also based on its mine pressure to decide, some of the roadway mine pressure is very small, the rock is very hard, and molding is good, you can take the way of surface blasting digging and support measures, relatively speaking, such a roadway cost is lower, but in addition to the rock type has certain requirements, but also on the digging and blasting technology has high requirements. Due to the different types of mine tunnel service, different service life, different mine pressure, different rock formations and other factors, take which kind of support to decide according to the actual situation, here will not be exhaustive.