化工矿物与加工2025，Vol.54Issue(9)：26-38,13.DOI:10.16283/j.cnki.hgkwyjg.2025.09.004
结构面层数与倾角对类岩体力学特性的影响及其损伤演化规律
Effect of the number of structural plane and dip angle on the mechanical properties of rock-like mass specimen and its damage evolution law
摘要
Abstract
The sedimentary phosphate rock has a typical layered hard structural plane,which has different degrees of damage under the action of excavation disturbance.In order to study the effect of the number and dip angle of struc-tural planes on the stability of rock mass with hard structural planes,standard rock-like mass specimens with 0,1,2,3 layers and 0°,10°,20° dip angles were prepared to carry out uniaxial compression mechanics experiments to simulate the stress environment of pillars.The macroscopic failure,mechanical properties and infrared characteristics of rock-like mass specimens were analyzed,and the damage evolution model of rock-like mass specimens with hard structural planes were established.The research results show that:①The number of structural plane and dip angle of structural planes have a significant impact on the mechanical properties and failure modes of rock-like mass materials.The increase in the number of structural plane and dip angle makes the rock mass more prone to interlayer displacement and the formation of secondary fractures,resulting in the decrease of rock mass stability;The stress-strain curve of rock-like mass structural planes can be divided into four stages,namely compaction adjustment,displacement plasticity,fracture peak display,and post-peak residual stage;With the increase of the inclination angle,the peak stress shows a decreasing trend;The increase in the number of structural plane leads to an increase in peak strain and a decrease in elastic modulus.②The infrared radiation temperature curve can be divided into four stages,namely quiet incubation,abnormal prominence,sudden increase in high temperature,and drop dissipation stage;In the initial loading stage,the rock-like mass specimens containing structural planes exhibit infrared thermal imaging anomalies caused by inter-layer dislocation,and the abnormal thermal image strip area is highly consistent with the final failure area;Infrared thermal imaging technology can effectively monitor the damage evolution of structural rock masses,identify potential risk areas,and provide real-time data support for safety assessment in engineering.③With the increase of the number of structural planes and the inclination angle,the damage variable of the specimen increases,especially when the incli-nation angle of the structural plane reaches 20°,the more the number of structural planes,the greater the damage accumulation.The established damage evolution model can effectively reflect the damage process of rock-like under different structural plane layers and dip angles.The research results provide new ideas for the stability analysis of rock mass with hard structural planes under excavation disturbance,and can also provide reference for rock mass stability assessment and disaster warning in engineering practice.关键词
硬性结构面/类岩体/层理/力学特性/损伤演化/开挖扰动/稳定性/结构面倾角Key words
hard structural plane/rock-like mass/structural plane/mechanical properties/damage evolution/exca-vation disturbance/stability/dip angle of structural plane分类
矿业与冶金引用本文复制引用
冯磊,吝曼卿,夏元友,张电吉,张岸勤,卢祥龙..结构面层数与倾角对类岩体力学特性的影响及其损伤演化规律[J].化工矿物与加工,2025,54(9):26-38,13.基金项目
国家自然科学基金项目(52174085,42077228) （52174085,42077228）
湖北省安全生产专项资金科技项目(SJZX20220910). （SJZX20220910）
