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Analysis and evaluation on seepage stability of Hongxing reservoir dam,Heilongjiang

Global Geology 2009年第4期12卷 230-235页

作者： YANG Zhishuang LI Xiaole ZHANG Qinqyu College of Construction Engineering Jilin University Changchun 130026 China Institute of Karst Geology CAGS Guilin 541004 China

Hongxing reservoir was constructed on the floodplain of Hulan River in Heilongjiang. The geological problem of the reservoir is the seepage of the dam base and its related seepage stability. The leakage of the reservoir is caused by the water head differences between the upstream and downstream of the dam. Severe seepage could decrease the engineering benefits of the reservoir. Moreover,infiltration function of water will influence the safety of the dam. Through the analysis on the granule constitute and the formation of the dam base,the types of the seepage failure apt to happen were defined and the anti-infiltration and the permissible depression ratio were determined. Using the numerical simulation software GMS,the two-dimension numerical modeling has been carried out to analyze the seepage field of the reservoir. Through the two conditions modeling with concrete impervious wall and no concrete impervious wall,the largest flow rate,single-wide seepage discharge and the max infiltration gradient of the dam base were calculated. According to the permeable depression ratio of the dam base,the seepage stability of Hongxing reservoir dam base was analyzed.

关键词： dam base seepage stability two-dimension seepage flow finite element analysis

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Discrimination conditions and process of water-resistant key strata

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Mining Science and Technology 2010年第2期20卷 224-229页

作者： WANG, Lianguo MIAO, Xiexing WU, Yu SUN, Jian YANG, Hongbo state key laboratory of geomechanics & deep underground engineering china university of mining & technologyxuzhou 221008china

Water-preservation mining is one of the most important parts of the ‘Green Mining' technology system,which can realize the effective regulation of groundwater resources by controlling strata movement,changing passive prevention and governance of water disasters to active conservation and utilization of groundwater resources and thus obtaining coal and water simultaneously in *** concept of water-resistant key strata further enriches the content of the key stratum theory and provides a theoretical basis for water-preservation *** order to realize the idea of water-resistant key strata as a guideline in the design of water-preservation mining and engineering applications,the conditions for discrimination in the process of water-resistant key strata,we have presented a mechanical model,as well as its corresponding computer program,based on a large number of theoretical analyses and field measurements,as well as on a comprehensive consideration of the position,structural stability and seepage stability of key *** engineering applications indicate that this discrimination method and its corresponding computer program on water-resistant key strata are accurate and reliable and can satisfy the actual design needs of water-preservation mining and thus have instructional importance for water-preservation mining in mining areas lacking water.

关键词： water-resistant key stratum water-preservation mining structural stability seepage stability

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