淮南矿区11煤顶板砂岩强度参数分布特征研究  

Study on Strength Parameter Distribution Features of Roof Sandstone of No.11 Seam in Huainan Mining Area

作　　者：罗勇 孙兴平[2] 陈菊香 陈建本[2] 侯俊友[2] LUO Yong;SUN Xingping;CHEN Juxiang;CHEN Jianben;HOU Junyou(Ping'an Coal Mining Engineering and Technology Research Institute Com pany Limited,Huainan 232001,China;Guqiao Mine,Huainan Mining Group Cor poration Li mited,Huainan 232001,China;School of Engineering,China University(Wuhan)of Geosciences,Wuhan 430074,China;Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,China)

机构地区：[1]平安煤炭开采工程技术研究院有限责任公司,安徽淮南232001 [2]淮南矿业(集团)有限责任公司顾桥煤矿,安徽淮南232001 [3]中国地质大学(武汉)工程学院,湖北武汉430074 [4]中国科学院武汉岩土力学研究所,湖北武汉430071

出　　处：《建井技术》2022年第2期33-40,共8页Mine Construction Technology

基　　金：国家自然科学基金面上项目(51974289);安徽省自然科学基金面上项目(210808ME155)。

摘　　要：为研究矿区深部沉积岩强度参数与埋深的相关关系,本文通过现场采集淮南矿区6个主要矿井11煤同一顶板砂岩试样,获取了埋深在430~900m范围内共计16种不同深度的106组砂岩试样,在此基础上,开展了巴西劈裂试验、单轴压缩试验和三轴压缩试验,分析了不同埋深试样强度参数,并结合三轴压缩试验数据,获取了试样粘聚力及内摩擦角与埋深的相关关系。结果表明,砂岩试样密度、单轴抗压强度及弹性模量随着埋深的增加呈现线性增加趋势,抗拉强度随着埋深的增加呈现非线性增加趋势。且随着赋存深度的增加,砂岩试样粘聚力和内摩擦角也逐渐增大。In order to study the correlated relationship between the strength parameter and depth of the sedimentary rock in the mining area,with the site collections of the sandstone samples from the same roof of No.11 seam from 6 major mines in Huainan Mining Area,there were totally 106 sandstone samples obtained from 16 different depths within the covered depth ranging from 430~900 m.At the circumstances,a Brazilian splitting test,uniaxial compression test and triaxial compression test were conducted and the strength parameters of the samples from different depth were analyzed.In combination with the data of the triaxial compression tests,the correlated relationship between the cohesive strength,internal friction angle and covered depth of the samples were obtained.The results showed that the density,uniaxial compression strength and elastic modulus of the sandstone samples would be in a linear increasing tendency with the covered depth increased and the tensile strength would be increased with the depth increased and would be in a linear increasing tendency.With the covered depth increased,the cohesive strength and internal friction angle of the sandstone samples also would be gradually increased.

关 键 词：砂岩 强度参数 赋存深度 岩石力学 

分 类 号：TD315[矿业工程—矿井建设]