Analysis of Mineralogical Composition and Texture to Quantify the Mechanical Properties of Red Bed Soft Rock#br#
——A Case Study of Leipi Rock at World Heritage Site, Mt. Langshan in Hunan Province

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Analysis of Mineralogical Composition and Texture to Quantify the Mechanical Properties of Red Bed Soft Rock#br# ——A Case Study of Leipi Rock at World Heritage Site, Mt. Langshan in Hunan Province

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- Analysis of Mineralogical Composition and Texture to Quantify the Mechanical Properties of Red Bed Soft Rock#br# ——A Case Study of Leipi Rock at World Heritage Site, Mt. Langshan in Hunan Province
- Acta Scientiarum Naturalium Universitatis SunYatseni Vol. 54, Issue 4, Pages: 139-149(2015)
- 作者机构：
  
  1. 中山大学地理科学与规划学院,广东,广州,510275
  2. 
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2015，
  
  Published Online：25 August 2015，
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Analysis of Mineralogical Composition and Texture to Quantify the Mechanical Properties of Red Bed Soft Rock#br# ——A Case Study of Leipi Rock at World Heritage Site, Mt. Langshan in Hunan Province. [J]. Acta Scientiarum Naturalium Universitatis SunYatseni 54(4):139-149(2015)
DOI：

Analysis of Mineralogical Composition and Texture to Quantify the Mechanical Properties of Red Bed Soft Rock#br# ——A Case Study of Leipi Rock at World Heritage Site, Mt. Langshan in Hunan Province. [J]. Acta Scientiarum Naturalium Universitatis SunYatseni 54(4):139-149(2015) DOI：

摘要

影响红层软岩力学性质的主要因素包括物质组成与结构特征。使用压力试验机测试获取了红层软岩的两种力学性质参数；利用偏光显微镜测定了红层软岩的物质组成成分、颗粒粒度结构特征；结合数学统计方法定量分析了红层软岩物质组成成分、颗粒粒度结构特征分别对其力学性质的影响。其研究分析表明：① 崀山丹霞红层软岩夹层的物质组成成分、颗粒粒径结构特征对其力学性质产生一定的影响，整体趋势是随着硬性物质成分（如石英、长石等）含量的增加和颗粒平均粒径的增大，其力学性质得到相应增强，表现为抗压强度、弹性模量等力学参数的增大。② 当颗粒平均粒径到达一定数值时（粒径约为025 mm时），抗压强度与弹性模量会同时发生一次较明显的跃变，由跃变可推测：物质组成成分对红层软岩力学性质的影响要大于颗粒平均粒径对红层软岩力学性质的影响。

Abstract

This study focuses on the mineralogical composition and texture of redbed soft rock. On the basis of the statistical analysis of the redbed soft rock characteristics

such as the composition

grain size observed under polarized light microscope

the effects of composition and texture on the mechanical properties were discussed respectively. The study on rock samples has shown that: ① the compressive strength and modulus of elasticity show a rising trend with the increase of mineralogy content and grain size; ② as average grain size increases

its compressive strength and modulus of elasticity become stronger accordingly. When the average grain size reaches a numerical range (diameter is about 025 mm)

the compressive strength and modulus of elasticity would bump up at the same time

according to which we can speculate that mineralogical composition has a bigger effect on the mechanical properties than the grain size.

关键词

红层软岩丹霞地貌物质组成力学性质定量研究

Keywords

red bed soft rockDanxia landformmineralogical compositionmechanical propertiesquantitative analysis

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Related Author

ZHANG Guifang

CHEN Kailun

ZHANG Haoran

ZHANG Hui

Related Institution

School of Earth Science and Engineering, Sun Yat-sen University

Guangdong Provincal Key Lab of Geodynamics and Geohazards, Sun Yat-sen University, Guangzhou

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