The ore structure parameters of the stage mining method depend on the stability of the ore, the characteristics of the ore body, the type of deep hole drilling rig, the type of mining equipment and the different schemes of the stage mining method. When the horizontal deep hole stage mining method i ...more...
As a key component of new energy vehicles, the power battery industry is still booming. Whether in industrial production or in the capital market, high-quality power battery companies have become a bright star. The sharp decline in subsidies in 2017 undoubtedly brought negative effects to the power ...more...
Ground pressure control with bottom pillar caving mining met…
2. Stress changes in ore bodies and surrounding rocks affected by mining The caving mining method is used to recover thick and extremely thick ore bodies. When the mining depth is increased, under the influence of mining, not only the stress in the upper rock mass changes, but also the impact of th ...more...
Bottomless sublevel caving mining method ground pressure con…
The entire recovery process of the bottomless sublevel caving method is completed in the recovery tunnel. Therefore, the recovery of the mining approach to maintain a good stable state is of great significance to safe production and improve the economic benefits of recovery. In order to maintain go ...more...
Solar pest report lamp realizes full coverage of forest pest…
In China's forestry region, rich forest resources are a valuable asset in the region. Therefore, the growth and safety of forest trees are very important, but the growth of large areas of forest is often accompanied by serious pests. Therefore, in order to effectively prevent and con ...more...
Factors Affecting the Stability of Hillside Open-pit Mining …
I. Introduction Metal and nonmetal mine production is the industrial production of high-risk industries, their chances of accidents and deaths account for a large proportion of industrial production in the field of security. Slope stability management is an important part of the safe production of ...more...
Commonly used transformer cores are generally made of silicon steel sheet. Silicon steel is a silicon-containing (silicon, also known as yttrium) steel with a silicon content of 0.8 to 4.8%. The core of the transformer made of silicon steel is because the silicon steel itself is a m ...more...