软硬互层组合岩体协同变形特征实验研究  

Experimental study on cooperative deformation characteristics behind soft and hard interbedded combined rock mass

作　　者：侯志远 李昊[1,2] 肖福坤 刘刚 张师浩[3] Hou Zhiyuan;Li Hao;Xiao Fukun;Liu Gang;Zhang Shihao(School of Mining Engineering,Heilongjiang University of Science&Technology,Harbin 150022,China;Laboratory of Ground Pressure Control&Gas Control in Deep Mining of Heilongjiang Coal Mine,Heilongjiang University of ScienceTechnology,Harbin 150022,China;Hongyang No.2 Mine,Shenyang Coking Coal Co.Ltd.,Shenyang 110100,China)

机构地区：[1]黑龙江科技大学矿业工程学院,哈尔滨150022 [2]黑龙江科技大学黑龙江省煤矿深部开采地压控制与瓦斯治理重点实验室,哈尔滨150022 [3]沈阳焦煤股份有限公司红阳二矿,沈阳110100

出　　处：《黑龙江科技大学学报》2025年第2期186-192,共7页Journal of Heilongjiang University of Science And Technology

基　　金：黑龙江省自然科学基金重点项目(ZD2021E006)。

摘　　要：为研究软硬互层岩体的变形特征,开展不同组合形式下软硬组合岩样单轴压缩变形实验,采集岩样加载至破裂过程应力与各分层岩样的变形数据,分析组合岩样应力与应变特征。结果表明:软硬组合岩体的强度介于软岩与硬岩强度的中间,略大于软岩,远小于硬岩;组合岩体弹性模量与极限强度变化规律一致,硬岩占比越高弹性模量与极限强度越大;强线性偏离阶段泥岩层径向应变存在减小趋势,砂岩层径向应变存在增长趋势,二者在该阶段内协同作用最为明显;组合岩样中砂岩层对泥岩层径向变形存在抑制作用,砂岩比例的增加会减小泥岩径向变形;同样,泥岩层占比增长也会促进砂岩层的径向变形。This paper aims to investigate the deformation characteristics behind soft and hard interbedded rock mass.The study conducts uniaxial compression deformation experiments of soft and hard combined rock samples in different combination forms.By collecting the stress data of rock samples during loading to fracture and the deformation data of stratified rock samples,the stress and strain characteristics of the combined rock samples are analyzed.The results show that the strength of the combined rock mass is in the middle of the strength of the soft rock and the hard rock,which is slightly greater than the soft rock and far less than the hard rock.The elastic modulus and ultimate strength of composite rock mass are consistent each other.And the higher the proportion of hard rock is,the greater the elastic modulus and ultimate strength are.In the strong linear deviation stage,the radial strain of mudstone layer decreases,and the radial strain of sandstone layer increases,which presents the most obvious synergistic effect in this stage.In the composite rock sample,the sand stratum inhibits the radial deformation of mudstone layer.With the increase of sandstone proportion,the radial deformation of mudstone decreases.Similarly,with the increase of the mudstone proportion,the radial deformation of sandstone layer can increase.

关 键 词：互层岩体 单轴压缩 应力-应变 协同变形 

分 类 号：TD67[矿业工程—矿山机电]