浦海, 陈家瑞, 倪宏阳, 等. 尺度效应对破碎岩体水沙渗流特性的影响[J]. 煤炭学报, 2016, 41(S1): 102-108. DOI: 10.13225/j.cnki.jccs.2015.1403
引用本文: 浦海, 陈家瑞, 倪宏阳, 等. 尺度效应对破碎岩体水沙渗流特性的影响[J]. 煤炭学报, 2016, 41(S1): 102-108. DOI: 10.13225/j.cnki.jccs.2015.1403
PU Hai, CHEN Jia-rui, NI Hong-yang, et al. Impact of deformation history on water-sand seepage characteristics of broken rock[J]. Journal of China Coal Society, 2016, 41(S1): 102-108. DOI: 10.13225/j.cnki.jccs.2015.1403
Citation: PU Hai, CHEN Jia-rui, NI Hong-yang, et al. Impact of deformation history on water-sand seepage characteristics of broken rock[J]. Journal of China Coal Society, 2016, 41(S1): 102-108. DOI: 10.13225/j.cnki.jccs.2015.1403

尺度效应对破碎岩体水沙渗流特性的影响

Impact of deformation history on water-sand seepage characteristics of broken rock

  • 摘要: 为研究尺度效应对破碎岩体水沙渗流特性的影响,设计了一套水沙渗透系统,利用CMT5305型电子万能试验机进行试验。在破碎岩体初始孔隙率相同时,岩样厚度的增加在一定程度上可增加破碎岩体的滤沙能力,减少溃沙量,从而降低溃沙灾害的风险;当破碎岩体初始孔隙率较大时,岩样厚度对其滤沙量的影响也较大,而当破碎岩体初始孔隙率较小时,破碎岩体的滤沙量受岩样厚度的影响也较小;破碎岩体的滤沙能力不会随着岩样厚度的增加而无限增加;岩样厚度的增加对水渗流的影响并不明显;初始孔隙率对水沙渗流特性的影响比岩样厚度的影响更大。根据试验结果提出了破碎岩体滤筛模型,给出了可表征初始孔隙率与筛层厚度对筛层滤沙能力综合影响的关系式。

     

    Abstract: In order to study the impact of scale effect of rock sample on seepage characteristics of water and sand mixture in broken rock,the authors design a water and sand infiltration system and use CMT5305 electronic universal testing machine to conduct a test. According to the test results,a sieving model of broken rock is proved,and a relationship is presented to characterize the comprehensive influence of initial porosity and sieve layer thickness on the ability of filtering sand. When the initial porosity of broken rock are same,the increase of thickness of rock sample can increase the ability of filtering sand of broken rock and reduce the amount of sand inrush,thereby the risk of sand inrush disaster can be reduced. When the initial porosity of broken rock is greater,the impacts of thickness of rock sample on the amount of filtering sand are greater,while when the initial porosity of broken rock is relatively small,the impacts of thickness of rock sample on the amount of filtering sand are smaller. While the thickness of rock sample increases,the ability of filtering sand will not infinitely increase.

     

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