Knowledge

Inclined longwall coal mining method  The working face is arranged along the coal seam direction, and the coal mining is advanced along the slope (inclined or down). Or the coal m

1. Basic concepts 1. Inclined layering—divide the thick coal seam into several layers parallel to the coal seam layer, and then mine layer by layer 2. Stoping sequence: descending

The single-stroke longwall mining method is mainly used for gently inclined, inclined thin and medium thick coal seams or gently inclined 3.5-5.0m thick coal seams 1. Tunneling The

1. Coal mining technology-the methods and equipment used in each process of the coal mining face and their coordination in time and space. 2. Coal mining system-the layout of minin

1. Coal field—a large area of coal-bearing zone formed by the deposition of carbonaceous material during the development of geological history. 2. Mining area-social combination fo

The sulfidation extraction technology of low-concentration copper resources in acidic water uses the principle of metal pH differential precipitation to separate metal ions such as

In recent years, the development of technology has put the global mining industry in an era of technological disruption, and mining companies are at a crossroads between the past a

According to data, since 1900, humans have consumed 197.2 billion tons of oil, 134 trillion cubic meters of natural gas, and 379.3 billion tons of coal. In the past 70 years, China

In recent years, with the vigorous advancement of green mine construction, the development of smart mining technology, the clearing of mineral rights in nature reserves, the advanc

1. Physical Geography The scope of this map compilation is East China, including Jiangsu, Zhejiang, Fujian, Jiangxi, Anhui, Taiwan and Shanghai. It is located in the southeast coas

From September 10th to 11th, the first China Mining Technology Innovation and Sustainable Development Forum was held in Shanghang County, Fujian Province. Chen Jinghe, Chairman of

September 14th: The Democratic Republic of the Congo said on Saturday that it will return value-added tax to mining companies operating in the country. Earlier, a decision by the D