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Ground subsidence in a Chinese underground gold mine is remarkable. To find out reasons and regularities of the subsidence, following research work was carried out: (1) systemetical investigations of engineering geological conditions, including in situ stress state, location and size of old river beds, ponds and unfilled mined-out areas, (2) in situ monitoring of strata movement by multi-point ...
Surface subsidence is a natural consequence of underground mining [31,32,33] and it can be coincident with mining activities or delayed in response to the time-dependent deformation of the rock mass. Certain mining and geologic factors, including the quantity and quality of the subsoil, rock components and superficial conditions, may influence ...
Potash mining is an important economic activity in the northeast of Spain. However, one of the main environmental issues produced for such type of mining is subsidence, which generates horizontal and vertical ground displacements. A Geographic
Subsidence is an inevitable consequence of underground mining – it may be small and localized or extend over large areas, it may be immediate or delayed for many years. Underground mining causes impacts to hydrologic features like lakes, streams, wetlands, and underground …
Mine subsidence is the movement of the ground that can occur after underground coal mining. After coal is extracted from beneath the ground, the land above can sink and fill the hollow mine workings. This can cause tilts and strains on the ground surface. Subsidence caused by old inactive mines in New South Wales is generally localised and only ...
Building above an abandoned mine can be dangerous if the mine is weak or near the ground surface. On Feb. 18, 2000, a collapse hole developed in the front yard of a house in Cabarrus County (Figure 21). The hole was above the old Phoenix Gold Mine, which closed in 1906. In the 1980s a suburban golf course community was built over the mine.
Sep 22, 2015 This study examined a single underground coal mine and investigated two aspects of its operation: the disposal of the mine waste through a discharge to a nearby river and the impact of subsidence from an underground longwall to a small waterway above. Water quality of the two waterways was monitored over a 2-year period with a monthly investigation over a 6-month period, …
Underground Mining. ... Common forms of subsidence in room and pillar coal mining [Whittaker and Reddish, 1989] ... An anthropogenic (zoogeomorphic) success story of reusing an old abandoned gold mine can be seen in Gold Reef City, Johannesburg, South Africa. This abandoned gold mine is now an urban geomorphic feature, (an entertainment area ...
[en] Land subsidence in the Sanshandao area, Laizhou, Shandong Province, China, has been a consequence of underground gold mining. This paper identifies the statistically significant mining subsidence factors, which are: (1) a digital elevation model of the surface; (2) the surface slope; (3) the slope aspect; (4) the thickness of the gold deposits; and (5) the depth of the gold deposits below ...
May 30, 2018 Four of the eight mines report subsidence-related ground problems, and in all these cases the interburden between the mines is less than 200 ft and the mining height in the lower seam is 60 in or greater. Fractured strata leading to roof control problems in setup and recovery rooms and in gate entries is a common problem.
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