煤矿安全2019，Vol.50Issue(10)：226-230,5.DOI:10.13347/j.cnki.mkaq.2019.10.052
基于损伤理论的卸压钻孔围岩特性分析
Analysis on Surrounding Rock Characteristics of Pressure Relief Borehole Based on Damage Theory
张磊 1程国强 1龚超1
作者信息
- 1. 山东科技大学 矿业与安全工程学院,山东 青岛 266590
- 折叠
摘要
Abstract
To study surrounding rock stress and strain field distribution after the construction of pressure relief hole, based on the nonlinear brittle damage constitutive model of rock and the continuous damage theory, the damage area and stress of surrounding rock in the borehole of non-uniform stress field are solved, and the analytical formulas of initial and limit geostress and radius of damage zone are obtained. Based on the analytical expression, the effects of the lateral pressure coefficient and the angle of the surrounding rock on the initial damage ground stress are analyzed through a numerical example. The effects of the parameters of brittleness and the lateral pressure coefficient on the radius of the damage zone and the stress of ultimate damage in the surrounding rock are analyzed. The results show that the ground stress of the borehole surrounding rock is related to the lateral pressure coefficient and the angle of surrounding rock. The influence of rock brittleness parameters on the radius of damage zone and the stress of limiting damage is related to the degree of damage. The ultimate geostress is affected by the brittleness parameter and lateral pressure coefficient of surrounding rock.关键词
损伤本构模型/连续损伤理论/钻孔围岩/损伤区半径/围岩应力场Key words
damage constitutive model/continuous damage theory/borehole surrounding rock/damage area radius/surrounding rock stress field分类
矿业与冶金引用本文复制引用
张磊,程国强,龚超..基于损伤理论的卸压钻孔围岩特性分析[J].煤矿安全,2019,50(10):226-230,5.
