摘要
参考借鉴地面水库坝体抗震安全评价的相关研究,构建了煤矿地下水库相似材料模型平台,进行了不同烈度条件下的动力破坏试验研究,并利用摩尔库伦模型对坝体在地震作用下的动力响应进行了数值仿真,研究了坝体的地震破坏形态、抗震薄弱环节以及影响因素;同时对同等条件下的地面水库坝体进行了模型试验和数值模拟,对比分析了地下水库与地面水库的抗震安全性。结果表明:物理模型试验和数值模拟得到的动力响应较为接近;在地震波逐级加载的过程中,由于受到顶底板约束,煤矿地下水库坝体晚于地面水库坝体进入塑性工作状态,验证了煤矿地下水库坝体较地面水库坝体具有更好的抗震安全性。在此基础上,提出了煤矿地下水库坝体安全系数概念,对比分析了同条件的煤矿地下水库坝体和地面水库坝体的安全稳定性。
As a new underground structure,the coal mine underground reservoir lacks quality indexes to evaluate its seismic resistant performance. To study the seismic performance of coal mine underground reservoirs,the shaking table testes and numerical simulations are designed and processed to analyze its dynamic behaviors and characteristics during earthquakes. For comparison,the seismic safety of a ground reservoir model in the same condition is studied through shaking table test and numerical simulation. The comparison between the calculated results and those obtained from shaking table tests shows that they are close and definitely verified each other. The comparison between the underground reservoir and the ground reservoir shows that their dynamic behaviors and characteristics have significant difference. As the constraint of roof and floor,the underground reservoir comes to a plasticity state significantly later than the ground reservoir in the same condition.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2016年第7期1589-1597,共9页
Journal of China Coal Society
基金
国家自然科学基金资助项目(U1361103
51479094)
水沙科学与水利水电工程国家重点实验室资助项目(2015-KY-04)
关键词
煤矿地下水库
相似模型
振动台试验
动力破坏
数值仿真
coal mine underground reservoir
scale model
shaking table test
dynamic damage
numerical simulation
