Adaptability Analysis of Powered Support in Longwall Top-coal Caving Minging of Steep Seam
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The paper has analyzed uses the light single wobbling pole caving supports in longwall top-coal caving mining by the large-scale finite element software ANSYS.According to the stress of the support and distribution situation of variation in shape,the paper has drawn some beneficial conclusions.It is much meaning to improve and optimize the type of support and the suited equipments,and increases reliability of caving powered support.Keywords:
Adaptability
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Model and its application on the evaluation of degree of difficulty of top coal caving in steep seam
The degree of difficulty of top coal caving of roadway sub level caving mining in steep seam is synthetically influenced by many factors such as intensity of coal, mining depth, coal seam thickness, pitch, roof and floor, parting and miscellaneous mining condition. On the basis of analysis of the experience and statistical data on the test and mining examples of roadway sub level caving in steep seam, the evaluation functions of the factors influencing the degree of difficulty of top coal caving are structured and the grey fuzzy evaluation model is established. The application of examples shows that the model is accurate and simple, and plays an important part in the design and production management of roadway sub level caving mining in steep seam.
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according to the practice of longwall with top-coal caving mining in deep coal seams of China, considering the comprehensive conditions of relatively thinner thick coal seams with more faults, high variation of coal thickness and small cross-section of the present mine workings and not intense strata behavior, the paper technically analyzes and discusses .adaptability of light-duty caving support and demonstrates its reasonable support type. Its application is validated at last.
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