The amalgamation method was initiated at the beginning of the Qin and Han dynasties in China, and it is a major contribution of the Chinese alchemists to the world. Our alchemists were early adopters of amalgamation to extract gold and silver, the law later descendant of Western countries. Mercury

First, coal mine water damage basics (1) Coal mine water damage Any flood that affects production, threatens mining face or mine safety, increases the cost per ton of coal, and partially or completely inundates the mine. It is called coal mine water damage. According to statistics, since the found

On April 1, the “Measures for the Parallel Management of the Average Fuel Consumption of Passenger Vehicles and New Energy Vehicles” was formally implemented. Some people think that the implementation of the double-integration policy means that auto companies will face a crisis situati

The first is to completely shut down the gypsum mines with large-scale mining areas and transfer them to new gypsum mining. The thickness of the interval should be greater than the requirement of "top three belts". The second is to combine the gypsum filling or stone masonry in the mining

The basic principle of treating mine fires is to prevent and focus on prevention. 1. General measures for mine fire prevention (1) Supporting wellbore with non-combustible materials Downhole yards, main roadways and diverticularies, in the event of a fire, pose a great threat to the entire mine.

After decades of development, the Chinese automobile industry has grown into an important pillar industry of the Chinese economy. Its long industrial chain, high relevance, wide employment, and large consumer influence have infiltrated all aspects of social development and resident life. The devel

In the roadway construction, the curved section roadway (curve) is often encountered. The curved road must be excavated according to the design radius of curvature. The extension of the middle line of the roadway, the arrangement of the working face blasthole, the support and the use of the rock loa