摘要
由于地下开采活动,致使在整体块状结构坚硬岩层中产生弹性能积聚,当弹性能积聚到一定程度时,坚硬岩层产生动力失稳,瞬间释放巨大动能,致使在坚硬岩层附近的含水层中产生超高水压,并在含水层与采掘临空面之间,产生瞬间冲破导水通道,产生动力突水。以海孜煤矿为例,通过现场勘查和数值模拟分析了离层产生的地质条件和主要因素,测试了坚硬岩层的冲击倾向性指标(tD,WET,KE),并设计和实施了冲击动力作用下反应超静水压力大小的试验,在此基础上基于爆炸力学的理论初步研究了动力冲破带的形成机理。
The elastic energy accumulates in the hard rock stratum with whole blocky structure because of underground mining.The hard rock stratum will fail with the increase of the elastic energy and instantaneously release massive energy of motion,which induces high water pressure in the aquifer near the hard rock stratum.The high water pressure creates the water-conducting which is impacted instantly between the aquifer and excavation free face so as to form the dynamic water inrush.Haizi Coal Mine is taken as a case study.The geological conditions and main factors of separation layer water are analyzed based on field investigation and numerical simulation.The burst tendency indices（Dt,WET and KE） of the hard rock stratum are tested.The excess hydrostatic pressure under the action of the impact dynamics is obtained by the relevant tests.Thus,the formation mechanism of dynamic impact failure zone is preliminarily studied based on the theory of blasting dynamic mechanics.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2011年第11期1726-1733,共8页
Chinese Journal of Geotechnical Engineering
基金
国家自然科学基金项目(40572160)
关键词
采矿工程
离层水
动力突水
超静水压力
冲击动力
mining engineering
separation layer water
dynamic water inrush
excess hydrostatic pressure
impact dynamics
