Study on overburden failure models and height of water flowing fractured zone in fully mechanized caving mining

doi:10.16265/j.cnki.issn1003-3033.2017.11.025

Abstract

Abstract: The paper was aimed at working out a new method for predicting height of water flowing fractured zone in order to ensure the safety of coal mining under water body. Mechanical models were built for overhanging integrity strata, cantilevered rock failure and fracture blocks. Mechanisms were analyzed for roof breaking down at first, cantilevered rock fracture and blocks structure instability. Furthermore, the theoretic calculation method of the height of water flowing fractured zone was worked out for fully mechanized caving mining. The theoretic calculation method was used to predict the height of water flowing fractured zone for a fully mechanized caving face in the Shaping mine. A predicted height comparison was done between the method and other two methods. The result shows that the theoretical prediction height is consistent with the regression analysis and the numerical simulation height.

Key words: fully mechanized caving mining, overburden failure model, strata movement, height of water flowing fractured zone, theoretical analysis

CLC Number:

X936

ZHAO Gaobo, GUO Wenbing, YANG Daming, LOU Gaozhong, ZHENG Dongjie. Study on overburden failure models and height of water flowing fractured zone in fully mechanized caving mining[J]. China Safety Science Journal, 2017, 27(11): 144-149.

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