煤矿层状岩体压力拱演化规律的相似模拟

发布时间：2018-03-23 03:25

  本文选题：采矿矿压　切入点：压力拱　出处：《地下空间与工程学报》2017年02期 　论文类型：期刊论文

【摘要】：采动作用下的岩体应力转移变化所形成的压力拱特征研究,对于采矿岩层控制和巷道围岩稳定具有重要的科学价值。基于理论分析和相似材料物理模型实验,分析了综放工作面上覆岩层变形破坏形态及其应力转移变化规律,证实了采矿矿压以压力拱的形式转移。研究表明:采煤工作面推进后,伴随着采场岩层应力的不断转移和调整,将在采场岩层中形成一个承担上覆岩层重力的压力拱,其空间形态近似为长轴在开采面推进向短轴与工作面平行向的鸡蛋壳形厚壁结构。工作面初采开始后,随其推进距离的增加,压力拱向周边岩层深部延伸;拱体厚度增大、拱内岩层应力升高。
[Abstract]:The study on the characteristics of the pressure arch formed by the change of stress transfer of rock mass under mining action is of great scientific value for the control of mining strata and the stability of roadway surrounding rock, based on theoretical analysis and physical model experiments of similar materials. This paper analyzes the deformation and failure pattern of overlying strata and its stress transfer change law in fully mechanized top-coal caving face, and proves that the mining pressure is transferred in the form of pressure arch. The study shows that: after the coal face is pushed forward, With the constant transfer and adjustment of stope stress, a pressure arch will be formed in the stope to bear the gravity of overlying strata. Its spatial form is approximately the egg shell structure with long axis advancing to the short axis and parallel to the face on the mining face. With the increase of the advance distance, the pressure arch extends to the deep layer of the surrounding rock with the increase of the initial mining distance, and the thickness of the arch body increases. The stress in the arch is increased.
【作者单位】： 安徽理工大学土木建筑学院;安徽理工大学矿业工程博士后流动站;中国矿业大学力学与建筑工程学院;
【基金】：湖南科技大学煤矿安全开采技术湖南省重点实验室开放基金(201202) 中国博士后科学基金(2013M541811) 国家自然科学基金(41301074) 安徽理工大学博士基金
【分类号】：TD315.3
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本文编号：1651690