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Geoenvironmental Disasters
Fig. 8 | Geoenvironmental Disasters

Fig. 8

From: Experimental investigation on stress distribution and migration of the overburden during the mining process in deep coal seam mining

Fig. 8

Development of overburden crack and subsidence process of overburden during the mining process. a The working face was advanced to 15 m from the open-off cut, b The working face was advanced to 20 m from the open-off cut, c The working face was advanced to 25 m from the open-off cut, d The working face was advanced to 35 m from the open-off cut, e The working face was advanced to 40 m from the open-off cut, f The working face was advanced to 60 m from the open-off cut, g The working face was advanced to 70 m from the open-off cut, and h The working face was advanced to 75 m from the open-off cut

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