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The Xiaozhai Tiankeng has been well known to local people since ancient times. Xiaozhai is the name of an abandoned village nearby and literally means "little village", and "Tiankeng" means Heavenly Pit, a unique regional name for sinkholes in China. A 2,800-step staircase has been constructed in order to facilitate tourism. [2]
The mine has been in production since 1906, and has resulted in the creation of a pit over 0.75 miles (1,210 m) deep, [5] 2.5 miles (4 km) wide, and covering 1,900 acres (3.0 sq mi; 770 ha; 7.7 km 2). It was designated a National Historic Landmark in 1966 under the name Bingham Canyon Open Pit Copper Mine. [2]
This list of deepest mines includes operational and non-operational mines that are at least 2,224 m (7,297 ft), which is the depth of Krubera Cave, the deepest known natural cave in the world. The depth measurements in this list represent the difference in elevation from the entrance of the mine to the deepest excavated point.
The enormous pit in Tierra Amarilla, in the country's Atacama Desert region, measures 105-feet-wide (32 meters) and about 650-feet-deep (200 meters), according to Chile's National Geology and ...
Rescue halted for several hours due to landslide at facility
The Big Hole – a former diamond mine in Kimberley, dug to 240 m (790 ft) between 1871 and 1914, making it the deepest hand-excavated pit in the world. Now a museum. Now a museum. The Jagersfontein Mine – operating between 1888 and 1971.
The Great Blue Hole, a giant submarine sinkhole, near Ambergris Caye, Belize. The following is a list of sinkholes, blue holes, dolines, crown holes, cenotes, and pit caves. A sinkhole is a depression or hole in the ground caused by some form of collapse of the surface layer.
Ravi Rai was working in the mine in the north-eastern state of Assam on Monday morning when water entered the pit. "We were holding on to a rope in 50-60ft (15-18m) deep water for at least 50 ...