Title: Study on Mine Strata Pressure Behavior Law of Top Coal Caving Mining in Thick Seam Secondary Mining Block of Previous Small Mine
Abstract: In order to study the mine strata pressure behavior law of the top coal caving mining in the thick seam secondary mining of the small mine and the residual seam of the top slice seam in the mining goaf influenced to the coal mining face in the bottom slice seam,a finite difference numerical calculation software FLAC3Dwas applied to the simulation analysis on the stress and energy distribution law of the secondary mining block in the small mine of Maozequ Mine and a site mine strata pressure measurement was conducted.The results showed that the residual coal would cause irregular influences to the present coal mining face and the influence scope related to the location of the residual coal.The main mode of the influence was the stress concentration.The numerical simulation results and the law showed by the mine strata pressure information were basic similar to each other and the results showed that there was a close relationship between the working resistance value and the top slice abnormal structure.The paper provided the basis to the safety and high efficient mining of the coal mining face in the secondary mining block under the similar conditions as well as for the mine.
Publication Year: 2013
Publication Date: 2013-01-01
Language: en
Type: article
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