What is the room and the column?
room and column are one of the oldest and most basic types of mining techniques. In this type of mining, parts of the soil are removed from the ground to create rooms, while other nearby portions are left in place to create natural columns. This allows miners to extract materials such as coal or metal from the soil removed from the rooms, but leaves columns to support the soil above. This mining technique works best for materials placed along the same horizontal plane or layer. The mining of rooms and columns can also be known in some areas as mining of bord and columns.
In the course of history, miners used a random strategy of room mining and columns to extract minerals from the ground. Workers would simply benefit from certain areas and leave other areas intact, with small planning or reason involved in the process. This led to dangerous conditions, especially in the form of caves or pressing failure.
When pressing failure is between the ground above the ground and Belo STISknut a single column until it disappoints. This is overweight to nearby columns, which can also cause failure. Once one column fails in the system of mining room and post, it is often very difficult to maintain a mining function, even with modern well -being techniques. Random mining of rooms and columns also leads to poor ventilation, which makes working conditions dangerous.
Today, the mining of rooms and columns is based on carefully planned grid systems. Mining experts take land samples and examine the conditions in place to determine the best layout and location for each room and column. A large place is often divided into sections or panels. Each panel has its own grid system and is separated from other panels by very large barrier columns. The barrier columns act as dividers between each section and are designed to stabilize the ground to maximize mining safety.
miners will choose toBU rooms and columns are fast, simple and requires very few equipment. Despite these advantages, this mining technique also represents several challenges for miners. One of the biggest problems is to determine the size of the columns. If the columns are too small, the system fails. However, if they are too large, valuable minerals or metals may be behind. This leads to the need to compensate for safety with productivity and profit, which can contribute to the conflict of interest between workers and the owners of the streams.