摘要
为了研究露天转地下开采边坡岩体的破坏特性及其对地下矿体开采的影响,采用相似实验和数值模拟相结合的方法按照实际开采过程对其进行了研究。详细分析了边坡岩体在不同开采水平下的损伤破坏特征,揭示出在地下矿体的开采过程中边坡岩体依次进入能量积蓄和突然释放的过程,间隔性地以巨大岩体崩塌的形式破坏产生循环动力冲击灾害,并阐明了灾害发生机理。为了避免冲击灾害,从消除冲击灾害发生的空间条件和减少应变能的大量积蓄2个方面提出了相应的控制措施。
In order to study the failure characteristics of slope in transition from open-pit to underground mining and its impact on underground mining,the paper studied on this issue by similar experiment and numerical simulation according to the actual mining process.The damage and failure characteristics of slope occurred during different mining levels were analyzed in detail.It also revealed the slope rock mass successively experienced the process of energy savings and sudden release during underground ore mining,huge rock interval collapsed from the slope owing to sudden release of energy saving slope can form the cycle dynamic shock disaster,and clarified the mechanism of disaster.In order to avoid the shock disaster,corresponding control measures were proposed from two aspects,that is by eliminating the space condition that shock disaster is caused and by reducing large savings of the strain energy.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2013年第A01期64-69,共6页
Journal of China Coal Society
基金
国家自然科学基金资助项目(51104057)
河南理工大学博士基金资助项目(B2012-075)
河南省高等学校深部矿井建设重点学科基金资助项目(2011KF-08)
关键词
露天转地下
边坡失稳
动力冲击灾害
演化机理
控制措施
from open-pit to underground mining
slope instability
dynamic shock disaster
evolution mechanism
control measure
