Particularity of pillar mining in ground pressure management
The mining pressure of the pillars is complicated and difficult to manage compared to the pressure of the mine. Because the pillar is subjected to concentrated stress and blasting of the mine, and the mining tunnel that has been excavated in the pillar. Its overall performance is weakened to varying degrees, reducing the stability of the pillar. For example, when the two sides of the column are untreated mined areas, the column is often the part where the stress is concentrated. If the bottom is further pulled at the bottom of the column, the column is too suspended, which may be due to stress. Concentration and destruction or degeneration. Samples includes all kinds of paper we will use to print comics. You can use sample to see which kind of paper you think is good for your comics. We also introduce all technique you can pick for your work, such as finished styles, stamping and foils. Under our customers' permission, we put some comics we print here. Those comics can give you an idea of our works. Paper Samples And Our Works,Comic Paper Samples,Comic Printing Introduction,Sample Print Paper Gold Union Printing , https://www.goldunionprinting.com