宁夏典型石窟表层岩石工程地质特征研究
Study on engineering geological characteristics of surface rocks of typical grottoes in Ningxia
张天文 1陈伟 1何立军 1梁伟 1常涛1
作者信息
- 1. 宁夏回族自治区矿产地质调查院自治区矿产地质研究所,宁夏 银川 750021
- 折叠
摘要
通过野外地质调查及岩石物理力学测试,对宁夏全区典型石窟岩石工程地质特性进行了综合研究.结果表明,石窟岩性主要为长石砂岩,杂砾岩、石膏岩及大理岩;填隙物主要由碳酸盐矿物为主,其次为黏土、菱铁矿、白云石等,胶结方式以孔隙式为主.砂砾岩硬度及抗风化强度表现为铁质(混铁质)胶结＞钙质胶结＞黏土胶结.岩石的风化程度与孔隙率、自然吸水率呈正比,即孔隙率、自然吸水率越大风化程度越强.
Abstract
The engineering geological characteristics of typical grottoes in Ningxia were comprehensively studied through field geological survey and rock physical and mechanical test.The results show that the lithology of the grottoes is mainly feldspar sandstone,conglomerate,gypsum rock and mar-ble.The interstitial material is mainly composed of carbonate minerals,followed by clay,siderite,dolo-mite,etc.The cementation mode is mainly porous.The hardness and weathering strength of sand con-glomerate are ferric cementation＞calcareous cementation＞clay cementation.The degree of rock weath-ering is proportional to the porosity and natural water absorption,that is,the greater the porosity and nat-ural water absorption,the stronger the weathering degree.
关键词
石窟表层岩石/工程地质特征/矿物成分/物理力学性质Key words
surface rock of grottoes/Engineering geological characteristics/Physical and mechanical properties of mineral composition引用本文复制引用
出版年
2024
NETL
NSTL
万方数据