摘要
根据马蹄形巷道受力后产生的变形特征,利用复变函数对马蹄形巷道进行弹塑性分析,研究构造应力的大小与方向对马蹄形巷道稳定性的影响,并针对马蹄形巷道稳定性问题,提出锚杆、锚索和混凝土喷层的联合支护方式。结果表明:构造应力大小及方向对马蹄形巷道的稳定性存在一定的影响,其中构造应力大小显著影响马蹄形巷道变形状态,沿最大水平主应力方向布置可改善巷道的稳定性;联合支护后的马蹄形巷道的变形位移量约为支护前的1/4,具有良好的支护效果。
According to deformation features of the horse-shoe shaped roadway produced by sufferance forces,an elasticplastic analysis of the horse-shoe shaped roadway was made by using complex functions.The effect of tectonic stress size and direction on the stability of horse-shoe shaped roadway was studied.The combined supporting method of anchor arm,anchor rope,and sprayed concrete layer was proposed in view of the stability of horse-shoe shaped roadway.The results show that the size and direction of tectonic stress have a certain influence on the stability of horse-shoe shaped roadway.The tectonic stress can significantly affect the deformation state of horse-shoe shaped roadway.The stability can be improved as the roadway was arranged along the maximum horizontal stress direction.The deformation displacement of the horse-shoe shaped roadway after combined supporting is about1/4of that before supporting,which demonstrates that the combined supporting has a good supporting effect.
作者
吕欣
武娜
刘祥鑫
曹志林
LYU Xin;WU Na;LIU Xiangxin;CAO Zhilin(Modem Technology and Education Center, North China University of Science and Technology,Tangshan 063009,China;College of Mining Engineering, North China University of Science and Technology,Tangshan 063009,China;Rock Failure and Instability Research Center, Dalian University of Technology, Dalian 116000, China)
出处
《济南大学学报（自然科学版）》
CAS
北大核心
2018年第1期27-38,共12页
Journal of University of Jinan(Science and Technology)
基金
国家自然科学基金项目(51604117)
河北省科技计划项目(15273908)
河北省高等学校科学研究计划项目(QN2014067)
关键词
构造应力
马蹄形巷道
稳定性
联合支护
tectonic stress
horse-shoe shaped roadway
stability
combined supporting
