首页|A method for predicting the water-flowing fractured zone height based on an improved key stratum theory
A method for predicting the water-flowing fractured zone height based on an improved key stratum theory
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In the process of using the original key stratum theory to predict the height of a water-flowing fractured zone(WFZ),the influence of rock strata outside the calculation range on the rock strata within the cal-culation range as well as the fact that the shape of the overburden deformation area will change with the excavation length are ignored.In this paper,an improved key stratum theory(IKS theory)was pro-posed by fixing these two shortcomings.Then,a WFZ height prediction method based on IKS theory was established and applied.First,the range of overburden involved in the analysis was determined according to the tensile stress distribution range above the goaf.Second,the key stratum in the overburden involved in the analysis was identified through IKS theory.Finally,the tendency of the WFZ to develop upward was determined by judging whether or not the identified key stratum will break.The proposed method was applied and verified in a mining case study,and the reasons for the differences in the devel-opment patterns between the WFZs in coalfields in Northwest and East China were also fully explained by this method.
Coal miningWater-flowing fractured zone heightPrediction methodImproved key stratum theory
Jianghui He、Wenping Li、Kaifang Fan、Wei Qiao、Qiqing Wang、Liangning Li
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State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines,Anhui University of Science and Technology,Huainan 232001,China
School of Earth and Environment,Anhui University of Science and Technology,Huainan 232001,China
Institute of Mine Water Hazards Prevention and Controlling Technology,School of Resources and Geosciences,China University of Mining and Technology,Xuzhou 221116,China
Department of Geotechnical Engineering,Nanjing Hydraulic Research Institute,Nanjing 210024,China
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Key Projects of Natural Science Foundation of ChinaScientific Research Start-Up Fund for High-Level Introduced Talents of Anhui University of Science and Technology
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