http://j.people.com.cn/n3/2024/0229/c95952-20138909.

https://zhuanlan.zhihu.com/p/581374639

According to Xinjiang Yaxin Coal Bed Gas Investment and Development (Group), “Highly efficient development technology for difficult-to-mine coal bed gas resources in Xinjiang” has made step-by-step progress. On-site coal underground gasification (UCG) tests were successful, and gasification in a coal seam 1,000 meters underground was realized for the first time in China.

UCG is a gas extraction technology that effectively burns coal in situ by underground ignition to produce combustible gases such as methane gas, hydrogen, and carbon monoxide. In accordance with the geological characteristics of coal distribution in Xinjiang Uygur Autonomous Region, an approach of simultaneous shallow coal seam gas extraction and deep UCG gas extraction was designed for this test. By adopting an ultra-large wellless underground gasification system and coal seam forced oxidation ignition technology, the gas was ignited 1,000 meters underground and produced gas in a stable manner.

Xinjiang Uygur Autonomous Region has projected coal resourcse of 2.19 trillion tons, accounting for 40% of China’s total coal resources, of which more than 50% is difficult to extract, and has high potential for UCG resources.