摘要
"固-气"耦合相似材料的研制是"固-气"耦合相似模拟实验的基础,由于以砂子、石蜡、油为原料的相似材料抗压强度较低,变化范围不大,对于较高强度岩层的物理相似模拟效果不佳。在上述材料研究的基础上,以河砂为骨料,将已选胶结材料普通水泥和玉米淀粉作为影响相似材料的主要因素,进行配比设计、试件制作及参数测试,分析水泥及淀粉含量的变化对试件抗压强度σc及渗透率K的影响。实验结果表明:水泥在调节材料抗压强度方面起主要作用,淀粉在调节材料渗透性方面起主要作用,从而得到此新型材料的材料特性。运用此材料能够进行较高强度及低渗透率(在达西渗流范围内)的"固-气"耦合物理相似模拟实验,为"固-气"耦合物理相似模拟实验的开展进一步补充了实验基础。
The development of ＂solid-gas coupling＂ similar material is the basis on conducting ＂solid-gas coupling＂ simulation experiments. The compressive strength of similar material that is made up of sand, paraffin and oil is too low and is limited in a small range. Therefore, it is bad for simulating rocks with high compressive strength in a physical simulation experiment. Based on the previous re- searches, using the sands as the main component, the cement and corn starch are chosen as main influence factors. The influence of cement and starch on compressive strength trc and permeability K of the similar material is analyzed by designing the mixture ratio, specimen preparation and parameter analysing. The results show that the cement plays a key role in regulating material compressive strength and the corn starch plays a key role in regulating material permeability. The material properties are summarized. The solid-gas coupling physical simulation experiments of high compressive strength and low permeability （in Darcy flow range） could be performed by using such new material. Thus, it replenishes a foundation for the solid-gas coupling physical simulating experiments carrying on in the future.
出处
《采矿与安全工程学报》
EI
CSCD
北大核心
2017年第5期981-986,共6页
Journal of Mining & Safety Engineering
基金
国家自然科学基金科学仪器基础研究专款项目(51327007)
国家自然科学基金项目(51174157,51304156)
陕西省自然科学基础研究计划项目(2014KJXX69)
关键词
“固-气”耦合
相似材料
抗压强度
渗透率
敏感性
solid-gascoupling
similar material
compressive strength
permeability
sensitivity
