摘要
为了进一步提高锚固硐室的抗爆能力,利用数值分析方法研究了不同强度顶爆下含锚固硐室Ⅲ类岩体的塑性变化规律。在试验动载作用下,整个模型主要在爆腔周围产生了半径大约42 cm拉剪屈服,并在侧墙上部其他区域岩体发生受拉屈服。随着动载强度加强,拉剪屈服区域以爆腔为中心呈球形向四周辐射,并逐渐向拱腰发展,且拱腰处的拉剪屈服区域逐渐向两边大约45°方向扩展,与硐室两侧发展下来的拉剪屈服区域相连接;受拉屈服区域也逐渐从两边向中间扩展,并且底板中间受拉区域逐渐从上向下、从中间向两边发展。
In order to improve the anti-explosion capability of underground opening reinforced by bolts,plastic change laws of gradeⅢrock mass of the underground opening were studied by numerical analysis under top explosions with different strength.Tension-shear yield with a radius of approximate 42 cm cavity was produced under dynamic load.The tension yield appeared in the other parts of the upper wall.With the increase of the dynamic load,the tension-shear yield area was radially centered the cavity and gradually developed toward the arch.The tension-shear yield area of the arch was gradually extended to about 45°on both sides,and gradually connected to the tension-shear yield area from both sides of the underground opening.Tension yield area was gradually growing from both sides to the middle of the underground opening.The tension yield area in the middle of the floor gradually developed from top to bottom and from the middle to both sides.
作者
王光勇
裴晨浩
WANG Guangyong;PEI Chenhao(School of Civil Engineering,Henan Polytechnic University,Jiaozuo 454000,Henan,China)
出处
《河南理工大学学报（自然科学版）》
CAS
北大核心
2018年第6期143-148,共6页
Journal of Henan Polytechnic University（Natural Science）
基金
国家自然科学基金资助项目(51304067)
河南省科技攻关项目(142102210438)
河南省高等学校青年骨干教师计划项目(2015GGJS-069)
关键词
抗爆能力
Ⅲ类岩体
锚固硐室
塑性变化
anti-explosion capability
gradeⅢrock mass
underground opening reinforced by bolts
plastic change
