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《Journal of Mining & Safety Engineering》 2016-06
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Seepage-stress characteristics of brittle-plastic filled fracture

CHEN Jingang;ZHANG Long;FAN Junwei;School of Mechanics & Engineering Science,Zhengzhou University;State Key Laboratory of Coal Resources and Safe Mining,China University of Mining & Technology;State Key Laboratory Cultivation Base for Gas Geology and Gas Control;  
With granite as the fracture wall and brittle-plastic materials(such as sandstone, different ratio of cement mortar, rubber and clay) as fillings, using seepage stress device, and under the conditions of lateral restraint, experiments were carried out for the seepage-stress characteristics of brittle-plastic filled fracture. The results have shown that the characteristic of seepage-stress of filled fracture is significant affected by brittle-plastic fillings. In the initial stage of loading, the high seepage of the filled fracture with brittle medium remains stable for a long time; when stress reaches peak value of filling medium, the seepage drops sharply; as the stress continues to increase, the seepage declines slowly and eventually stays fairly low. As stress gradually increases, the high seepage of elastic-plastic filled fracture continues for a short time during the initial stage, then the seepage drops sharply until it reaches the lowest level. Plastic filled fracture's seepage continues to decrease quickly to a lower level under the action of stress, where high seepage phenomenon is seldom found. Finally, the mathematical and generalized seepage-stress models of brittle-plastic filled fracture are set up according to the typical characteristics of experiment.
【Fund】: 中国矿业大学煤炭资源与安全开采国家重点实验室开放基金项目(13KF04);; 河南省瓦斯地质与瓦斯治理重点实验室开放基金项目(WS2013A04);; 河南省高等学校重点科研项目(15A620003 12B410003)
【CateGory Index】: TU45
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1 CHEN Jingang;ZHANG Long;FAN Junwei;School of Mechanics & Engineering Science,Zhengzhou University;State Key Laboratory of Coal Resources and Safe Mining,China University of Mining & Technology;State Key Laboratory Cultivation Base for Gas Geology and Gas Control;;Seepage-stress characteristics of brittle-plastic filled fracture[J];采矿与安全工程学报;2016-06
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