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机构地区:[1]中国矿业大学资源与地球科学学院,江苏徐州221116
出 处:《实验技术与管理》2016年第4期73-76,共4页Experimental Technology and Management
基 金:中国矿业大学实验室与设备管理处自制实验仪器项目
摘 要:介绍了自制实验给水度仪的研制目的意义和方法,通过相关专业4个学年的实验验证,该仪器符合实验室测定岩土孔隙度、给水度和持水度的要求,测试结果正确。实验结果验证了:(1)沙土的孔隙度主要取决于沙土的分选性,与粒径大小无关,分选性越好孔隙度越大,分选性越差孔隙度越小,颗粒大小悬殊越大孔隙度越小;(2)沙土的给水度与颗粒大小及排列分布有关,均质的沙土,颗粒越粗给水度愈大,粗细沙混合的非均质沙土给水度偏小,混合沙砾粒径越小给水度越小。The developing goal and methodology of self-made specific yield instrument are introduced. It is turn out by 4 academic-years experiments that the instrument meets the requirements for measuring porosity, specific yield and specific retention and the results are correct. Experimental results support such viewpoints in the textbook: (1) porosity of sandy soil depends on sorting and not on the grain size. Good sorting results in large porosity and worse sorting come up with less porosity with large difference in grain sizes resulting in small porosity. (2) Specific yield of sandy soil is affected by grain sizes and distribution. Specific yield will increase with larger grain sizes in homogeneous sandy soil, while specific yield can be quite low in non- homogeneous mixed sandy soil. Specific yield will be less when grain size of mixed sand soil decreases.
分 类 号:P641-33[天文地球—地质矿产勘探]
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