Fracture development and fractal characteristics of overburden rock under repeated mining

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dc.contributor.authorZhang, Z
dc.contributor.authorZhang, Y
dc.contributor.authorXu, Y
dc.date.accessioned2021-05-24T09:16:55Z
dc.date.available2021-05-24T09:16:55Z
dc.date.issued2021
dc.description.abstractThe purpose of this paper is to provide scientific basis for the stability evaluation of overburden rock of repeated mining goaf under the expressway. The objectives of the present study are to reveal the development of overburden rock fractures under repeated mining and to identify the fractal characteristics of the overburden rock fractures. The results show that (1) the separation fracture and vertical fracture fissure are developed in the overburden rock under repeated mining; (2) after the mining of the lower coal seam, the fractures developed in the overburden rock of the goaf are obviously retained in general. The number of fractures on both sides of the goaf is relatively large, while in the central part, it is relatively small and the fractures in most areas are basically closed; (3) under the same advancing length of working face in the lower coal seam, the fractal dimension in the caving zone is larger than that of the fractured zone; (4) with the increase of the advancing length of working face in the lower coal seam, the variation trend of the fractal dimension appears from small to large and then to small and stable; (5) when the repeated mining is over and the overburden rock movement is basically stable, the ratio of the fractal dimension in the caving zone and the fractured zone is 1.067:1. The results have an important reference value for ensuring the safety of the expressways above the repeated mining goaf in Shanxi region and similar areas.en_US
dc.identifier.citationZhang, Z. et al. (2021). Fracture development and fractal characteristics of overburden rock under repeated mining. Arabian Journal of Geosciences ,14(3),225en_US
dc.identifier.issn1866-7511
dc.identifier.uri10.1007/s12517-021-06524-6
dc.identifier.urihttp://hdl.handle.net/10566/6184
dc.language.isoenen_US
dc.publisherSpingeren_US
dc.subjectAdvancing lengthen_US
dc.subjectCaving zoneen_US
dc.subjectFractal dimensionen_US
dc.subjectFractured zoneen_US
dc.subjectGoafen_US
dc.subjectVariation trenden_US
dc.titleFracture development and fractal characteristics of overburden rock under repeated miningen_US
dc.typeArticleen_US

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