| 基于能量耗散原理的红砂岩崩解机制研究 |
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| 引用本文： | 刘晓明,熊力,刘建华,赵明华.基于能量耗散原理的红砂岩崩解机制研究[J].中南大学学报(自然科学版),2011(10). |
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| 作者姓名： | 刘晓明 熊力 刘建华 赵明华 |
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| 作者单位： | 湖南大学土木工程学院;长沙理工大学交通运输工程学院; |
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| 基金项目： | 国家自然科学基金资助项目(50808076); 湖南省科技推广重点项目(2007CK3065) |
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| 摘 要： | 为了研究红砂岩的崩解机制,寻找阻滞其崩解的方法,通过分析红砂岩崩解过程中传递的不同能量类型及其定量计算方法,基于能量耗散原理建立红砂岩崩解的能量耗散模型。结合工程实例,运用该模型分析红砂岩在崩解过程中的能量变化规律。研究结果表明:在岩石自然环境中的崩解过程中,随着岩石粒径变小,其新增表面积越来越大,其新增表面能随时间呈线性增大,但是,在这个过程中,岩石对吸收能量的利用率下降,说明红砂岩在不同崩解阶段对吸收热量的利用率不同;红砂岩崩解能量利用率随崩解呈指数衰减。建议工程上在治理红砂岩问题时可采用预先崩解的方法,然后采用压实破碎,包边封闭的方法尽量减小红砂岩与外界环境接触的面积,切断软岩崩解所需的能量来源,以延迟其崩解。
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| 关 键 词： | 红砂岩 崩解机理 能量耗散 表面能 能量利用率 |
Slacking mechanism of red sandstone based on energy dissipation principle |
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| LIU Xiao-ming,XIONG Li,LIU Jian-hua,ZHAO Ming-hua.Slacking mechanism of red sandstone based on energy dissipation principle[J].Journal of Central South University:Science and Technology,2011(10). |
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| Authors: | LIU Xiao-ming XIONG Li LIU Jian-hua ZHAO Ming-hua |
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| Institution: | LIU Xiao-ming1,XIONG Li1,LIU Jian-hua2,ZHAO Ming-hua1 (1.College of Civil Engineering,Hunan University,Changsha 410082,China,2.School of Communication and Transportation Engineering,Changsha University of Science and Technology,Changsha 410004,China) |
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| Abstract: | In order to reveal the slacking mechanism of red sandstone,and find the method to inhabit its slacking properties,the types of energy during the slacking process of red sandstone and their calculation method were analyzed.Based on the energy dissipation theory,the energy dissipation model of red-bed soft rock disintegration was established.The model was adopted to analyze the change rule during the slacking process of red sandstone.The results show that during the slacking process of red sandstone in nature... |
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| Keywords: | red sandstone slaking mechanism energy dissipation surface energy energy utilization ratio |
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