摘要
以波动冲击理论为基础,利用低能爆炸载荷模拟冲击地压能急剧释放,采用数字散斑光测方法(DSCM),对锚杆支护巷道变形破坏进行相似模拟研究。试验结果表明,在高速冲击载荷作用下,巷道顶板及模型顶板分别出现竖向和横向裂缝,且顶板有明显下沉,位移约为2.5 mm,进而巷道顶板岩层与锚网脱离、塌落。试验结果也说明锚杆支护方法适用于弱冲击地压等级的巷道支护,对于强冲击巷道支护可采取增设柔性吸能材料或加固措施。
Based on wave impact theory,impact energy which released dramatically for rock burst was simulated by low-energy explosive loading.Digital speckle correlation method（DSCM） was used to similar material simulation on deformation and failure of roadway of rock bolting under impact loading.The results show that the roof and top of model appear vertical and horizontal cracks respectively under high-speed impact load.Digital speckle pattern observations illustrate that the roof have obvious sinking deformation about 2.5 mm,also roof rock break away from anchor nets and collapse.Test results also show that rock bolting is applicable to weak level rockburst roadway.For strong impact roadway,it is suggested to take flexible energy absorbing material or reinforcement measures.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2011年第1期24-28,共5页
Journal of China Coal Society
基金
国家重点基础研究发展计划(973)项目(2010CB226803)
