SHIJIAZHUANG, July 1 (Xinhua) -- Geological workers in north China's Hebei Province have dug into a reserve of hot, dry rocks.
A geological team managed to dig into the hot, dry rocks that are at a temperature of 150 degrees Celcius and a depth of 3,965 meters in Matouying Township of Tangshan City, according to the Hebei Provincial Bureau of Coal Geology.
Beginning in 2018, the team started survey work on hot dry rock (HDR) resources in the city of Tangshan.
According to experts, the rocks cover an area of 80 square km at a depth of 4,000 meters and at least 500 square km at a depth of 5,000 meters. The rocks equal tens of billions of tonnes of standard coal. The resources can be applied in power generation, heating and plantation, among others, said Zhang Guishuang, with the bureau. They could also help optimize the energy structure in Hebei.
HDR is a green energy that contains no water or steam. It is usually found 3 km to 10 km deep in the earth, with temperatures of up to 650 degrees Celcius. As safe and highly effective energy, it is widely used in power generation and heating.