Thermal Stress State in the Vicinity of Underground Roadways

IF 0.7 4区 工程技术 Q4 MINING & MINERAL PROCESSING
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引用次数: 0

Abstract

The article addresses the problem on thermal stresses and stress–strain behavior of rock mass during deep-level mining. The author proposes an approach to determining the stationary field of temperatures in the zone of mining with cemented paste backfill with single formation of stiffness matrix in the calculation. It is found that inclusion of the temperature change depthward rock mass in the analysis results in the increase in the initial horizontal stresses while the initial vertical stresses remain unaltered. The calculation method of stress redistribution in the course of mining with backfill, with the same stiffness matrix used at all calculation stages, is modified for taking into account the thermal stresses. The calculation of the thermal stress state of surrounding rocks and backfill is carried out for a case of mining with backfill in a gently dipping ore body.

地下道路附近的热应力状态
摘要 文章探讨了深层开采过程中岩体的热应力和应力应变行为问题。作者提出了一种在计算中采用单一刚度矩阵形成的水泥浆回填法确定开采区温度静止场的方法。研究发现,在分析中加入岩体深度的温度变化会导致初始水平应力增加,而初始垂直应力保持不变。回填采矿过程中应力重新分布的计算方法,在所有计算阶段都使用相同的刚度矩阵,在考虑热应力后进行了修改。针对在缓倾斜矿体中进行回填采矿的情况,对围岩和回填土的热应力状态进行了计算。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Mining Science
Journal of Mining Science 工程技术-矿业与矿物加工
CiteScore
1.70
自引率
25.00%
发文量
19
审稿时长
24 months
期刊介绍: The Journal reflects the current trends of development in fundamental and applied mining sciences. It publishes original articles on geomechanics and geoinformation science, investigation of relationships between global geodynamic processes and man-induced disasters, physical and mathematical modeling of rheological and wave processes in multiphase structural geological media, rock failure, analysis and synthesis of mechanisms, automatic machines, and robots, science of mining machines, creation of resource-saving and ecologically safe technologies of mineral mining, mine aerology and mine thermal physics, coal seam degassing, mechanisms for origination of spontaneous fires and methods for their extinction, mineral dressing, and bowel exploitation.
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