摘要
地下岩巷掘进工作面经常会发生局部动力现象或动力灾害(如岩爆)。为研究其发生机理,根据封闭应力假说建立含应力包裹体的掘进工作面简化力学模型;基于弹性力学基本理论,推导了含应力包裹体的掘进工作面应力分布公式及最大主应力公式;基于最大主应力准则,当岩巷掘进工作面距离包裹体一定距离时,沿最大主应力方向破裂面之间的岩石会在上覆岩层及应力包裹体联合作用下向采掘空间运移,形成V形爆坑。本研究可在一定程度上解释掘进工作面岩爆现象,并为预防岩爆提供理论支持。
Local dynamic phenomena or dynamic disasters such as rock burst often occur in the driving faces of underground rock roadway.In order to study its occurrence mechanism,based on the'locked in'stress hypothesis,a simplified mechanical model with a stress inclusion was established.Based on the basic theory of elastic mechanics,the stress distribution formula and the maximum principal stress formula of the driving face with a stress inclusion were derived.Based on the maximum principal stress criterion,when the rock roadway is located at a certain distance from the inclusion,the rock between the fracture planes along the direction of maximum principal stress could move to the excavation space under the combined action of overlying strata and stress inclusions,and form a V-shaped blasting pit.The research in this paper can explain the rock burst phenomena of driving face to a certain extent,and provide theoretical support for preventing rock burst.
作者
杨小彬
周杰
张子鹏
Yang Xiaobin;Zhou Jie;Zhang Zipeng(College of Resources and Safety Engineering,China University of Mining and Technology,Beijing 100083,China;Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources,Beijing 100083,China)
出处
《矿业科学学报》
2019年第4期337-342,共6页
Journal of Mining Science and Technology
基金
国家自然科学基金(51274207)
国家自然科学基金青年基金(50904071)
关键词
掘进工作面
岩爆
应力包裹体
最大主应力
driving face
rock burst
stress inclusion
maximum principal stress
