层理角度影响下油页岩优势冲击破碎角度研究  

Study on the Dominant Impact Crushing Angle of Oil Shale under the Influence of Stratigraphic Angle

作　　者：甘泽 李富平 杨曦[1,2] 甘德清 GAN Ze;LI Fuping;YANG Xi;GAN Deqing(College of Mining Engineering,North China University of Science and Technology,Tangshan 063210,China;Mining Development and Safety Technology Key Laboratory of Hebei Province,Tangshan 063210,China)

机构地区：[1]华北理工大学矿业工程学院,河北唐山063210 [2]河北省矿业开发与安全技术实验室,河北唐山063210

出　　处：《金属矿山》2023年第9期54-62,共9页Metal Mine

基　　金：国家自然科学基金项目(编号:52074124)。

摘　　要：油页岩包含大量层理结构,层理角度的变化会造成破碎形式与破碎粒度的较大差异。为明确层理角度影响下油页岩破碎形式与粒度特征,确定油页岩优势破碎角度,开展油页岩破碎筛分、含油率测定、电镜扫描分析和数值模拟研究。研究结果表明:3~1 mm粒径范围的油页岩颗粒含油率高,是油页岩颗粒破碎的优势粒径范围。油页岩破碎形式受层理结构影响,不同层理角度下,其破碎形式可以分为5种,即穿层劈裂破坏、穿层剪切破坏、劈裂穿层破坏、剪切破坏和劈裂型的剪切张拉破坏。70°、80°和90°层理角度下,破碎后油页岩的粒度较小,优势粒径颗粒含量均达到40%以上。其中80°层理角度优势粒径颗粒含量最高,90°层理角度油页岩颗粒均匀性更好。可以认为油页岩的优势冲击破碎角度为80°~90°。油页岩破碎后的粒度分布函数本质上是对其破碎颗粒分形分布的描述,在此基础上以Weibull分布函数模型对其破碎粒度进行定量描述,结果较为准确。Oil shale contains a large number of stratification structures.The variation of stratification angle can cause a large difference in crushing form and crushing size.In order to clarify the dominant impact crushing angle,crushing form and particle characteristic under the influence of stratification angle,sieving test,oil content determination,electron microscope scanning analysis and numerical simulation were carried out.The results showed that oil shale particles in the range of 3~1 mm particle size have high oil content,which is the advantageous particle size range for oil shale particle crushing.The form of oil shale fragmentation is influenced by the stratigraphic structure,and the crushing forms can be divided into five types under dif-ferent stratification angles,namely,splitting damage through layers,shearing damage through layers,through-layer damage,shearing damage and splitting type of shear tensioning damage.At 70°,80°and 90°stratification angles,the particle size of crushed oil shale is smaller,and the content of dominant particle size reaches more than 40%.Among them,the dominant parti-cle size content is the highest at 80°,and the uniformity of oil shale particles is better at 90°.It can be considered that the dominant impact crushing angle of oil shale is 80°~90°.The particle size distribution function of oil shale after crushing is es-sentially a description of the fractal distribution.On this basis,the Weibull distribution function model is used to quantitatively describe its crushing particle size,and the results are more accurate.

关 键 词：油页岩 层理角度 破碎形式 粒度特征 优势破碎角度 

分 类 号：P618.12[天文地球—矿床学] TE662[天文地球—地质学]