周游,陈彦龙

• 1:中煤科工生态环境科技有限公司
• 2:天地科技股份有限公司
• 3:中国矿业大学深部岩土力学与地下工程国家重点实验室

摘要(Abstract)：

为了研究高寒地区冻融循环次数对饱水砂岩物理力学特性的影响，开展了冻融0次、20次、40次和60次四种不同冻融循环次数下西部某露天矿砂岩单轴压缩试验。基于试验结果，分析了冻融循环对砂岩质量、变形及强度等物理力学特性的影响规律。通过分析得到以下结果：随着冻融次数的增加，饱水砂岩质量不断增加，到冻融40次后，砂岩质量趋于稳定；砂岩的应力-应变曲线呈现出四个阶段，峰值强度和弹性模量随着冻融次数增多而呈线性减少的变化趋势。建立了以应变和冻融次数为输入层，应力为输出层，含一个隐含层的神经网络本构模型。通过对比分析冻融60次试验结果，验证了该模型具有良好的适用性。

关键词(KeyWords)： 冻融循环;力学特性;砂岩;神经网络;本构模型

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目（51974295）“循环载荷及爆破冲击下露天端帮采硐顶板和煤柱的失稳机理与防控”;; 中国煤炭科工集团有限公司科技创新创业资金专项重点项目（2022-2-ZD004）“煤基固废协同处置利用关键技术及装备研发”

作者(Author): 周游,陈彦龙

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