基于颗粒流的裂隙砂岩腐蚀后裂纹扩展规律分析  

Analysis of Crack Expansion Pattern after Corrosion of Fractured Sandstone Based on Particle Flow

作　　者：康志强 王治磊 冯江江 辛东夫 姚旭龙 KANG Zhiqiang;WANG Zhilei;FENG Jiangjiang;XIN Dongfu;YAO Xulong(School of Mining Engineering,North China University of Science and Technology,Tangshan 063210,China;Hebei Mining Development and Safety Technology Laboratory,Tangshan 063210,China;Green Intelligent Mining Technology Innovation Center of Hebei Province,Tangshan 063210,China;CMGB BU-1 Research Instetute of Urban Safety and Underground Space Co.,Ltd.,Beijing 101100,China)

机构地区：[1]华北理工大学矿业工程学院,河北唐山063210 [2]河北省矿业开发与安全技术实验室,河北唐山063210 [3]河北省矿山绿色智能开采技术创新中心,河北唐山063210 [4]中冶一局城市安全与地下空间研究院有限公司,北京101100

出　　处：《金属矿山》2024年第2期144-151,共8页Metal Mine

基　　金：国家自然科学基金项目(编号:52074123)。

摘　　要：基于颗粒流离散元法,对腐蚀后预制裂纹的砂岩进行双轴压缩试验,利用颗粒流PFC^(2D)模拟分析不同化学腐蚀后裂隙岩石的裂纹起裂、扩展和贯通破坏规律。研究结果表明:溶液腐蚀后裂隙砂岩在双轴加载下,加载的侧压不同其应力—应变曲线的变化特征随着侧压加载越大,峰值强度越高。不同化学溶液腐蚀作用下翼形裂纹萌生的角度发生不同程度的变化,翼形裂纹及剪切裂纹萌生的数量及角度会产生明显的变化,其中盐酸溶液对岩石造成损伤程度最大。综合考虑化学腐蚀和力学特性,可以建立裂隙岩石的数值模型,进一步分析其在不同环境下的行为。这对于理解岩石的稳定性和在地质工程方面的应用具有重要意义。Biaxial compression tests based on particle flow discrete element method were conducted on sandstone with prefabricated cracks after corrosion to analyze the crack initiation,extension and penetration damage laws of fractured rocks af-ter different chemical corrosion,and the experimental phenomena were analyzed using particle flow PFC^(2D) simulations to ex-plain.The results show that:the change characteristics of the stress-strain curve of the fractured sandstone after solution corro-sion under biaxial loading with different loaded side pressures with the higher side pressure loading,the higher the peak strength.The angle of wing-shaped cracks sprouting under different chemical solution corrosion changes to different degrees,and the number and angle of wing-shaped cracks and shear cracks sprouting will produce obvious changes,among which hydro-chloric acid solution causes the greatest degree of damage to the rock.Considering chemical corrosion and mechanical proper-ties together,a numerical model of the fractured rock can be established to further analyze its behavior under different environ-ments.This is important for understanding the stability of rocks and for applications in geoengineering.

关 键 词：颗粒流 预制裂隙 化学腐蚀 双轴压缩 裂纹扩展 

分 类 号：TD315[矿业工程—矿井建设]