Does china use longwall mining of covenional?

China primarily uses longwall mining methods for extracting coal. Longwall mining is a highly efficient and mechanized underground mining technique that allows for continuous extraction of coal seams over a large area. In China, longwall mining is widely adopted due to the country's vast coal reserves and the need to meet its high energy demands.

Conventional mining methods, such as room-and-pillar mining, are also used to a lesser extent in China. However, longwall mining is generally preferred due to its increased productivity, safety, and resource efficiency.

Here's an overview of longwall mining in China:

1. Large-Scale Application: China is one of the largest producers and consumers of coal globally, and longwall mining plays a crucial role in meeting the country's coal needs. It is extensively employed in major coal-producing regions, including Shanxi, Inner Mongolia, and Xinjiang.

2. Advanced Technology: Chinese mining companies have adopted advanced longwall mining technologies to enhance safety, efficiency, and productivity. These technologies include automated coal cutting machines, high-capacity conveyor systems, and sophisticated monitoring and control systems.

3. Longwall Faces: Longwall mining involves creating a long and wide underground panel called a "longwall face." Miners use powerful cutting machines to extract coal from the face while simultaneously installing roof supports to maintain safety.

4. Continuous Extraction: The longwall mining process is continuous, with coal being extracted along the entire length of the longwall face. This allows for high production rates and efficient resource utilization.

5. High Recovery Rates: Longwall mining achieves higher coal recovery rates compared to conventional mining methods. By minimizing coal losses and maximizing resource extraction, longwall mining contributes to sustainable mining practices.

6. Improved Safety: Longwall mining incorporates various safety measures, such as roof support systems, ventilation controls, and methane gas monitoring, to ensure miner safety during operations.

Overall, China's extensive use of longwall mining has significantly increased its coal production capacity and efficiency while adhering to safety and environmental standards.