煤矿安全2019，Vol.50Issue(1)：1-3,8,4.DOI:10.13347/j.cnki.mkaq.2019.01.001
基于不同应力的水力裂缝形态试验研究
Experimental Study on Fracture Morphology Based on Different Stress
摘要
Abstract
To study the fracture morphology, hydraulic fracturing experiments were conducted by means of hydraulic fracturing device and specimen made of similar materials under condition of different stress. The results show that the probability of forming single fracture is greater than that of forming complex fracture morphology under two-dimensional stress conditions. The complexity of fracture morphology is closely related to experimental stress. When the values of triaxial stress (maximum horizontal principal stress, vertical stress, minimum horizontal principal stress) differ greatly, it is easier to form single fracture. While two parameters of them are close and both are different greatly in values, the fracture morphology becomes complex. There is an angle between main fracture and bifurcate fracture and the angle varies in different specimens, the fractures all propagate along the direction of parallel to maximum horizontal stress.Under the same condition, fracture morphology upon different fractured specimens are different from each other, which is related to the homogeneity of the specimen, flow path of fracturing fluid and feature of fractured surface.关键词
煤层气/相似材料/水力压裂/裂缝形态/瓦斯抽采Key words
coalbed methane/similar material/hydraulic fracturing/fracture morphology/gas drainage分类
矿业与冶金引用本文复制引用
张帆,马耕,刘晓,陶云奇,冯丹..基于不同应力的水力裂缝形态试验研究[J].煤矿安全,2019,50(1):1-3,8,4.基金项目
国家自然科学基金资助项目(51574093) （51574093）
贵州大学引进人才资助项目(贵大人基合字(2015)30号,贵大人基合字(2016)58号) （贵大人基合字(2015）
