摘要
地下天然裂缝是导致地质灾害的主要原因之一 ,轮南奥陶系埋深在 5 0 0 0 m以下 ,岩体的天然裂缝不能直接观察 ,且其天然裂缝发育受多种因素控制 ,在地质演化过程中经多期发育而成 ,发育机理非常典型、复杂。通过观察、描述岩芯的裂缝发育特征 ,分析深度、温度、围压、剥蚀、裂缝充填等因素对地下岩体力学性质的影响 ,确定了裂缝发育的控制因素。进而预测了裂缝发育概率分布和发育特点 ,分析了轮南地区奥陶系天然裂缝的发育机理。
Underground natural fracture is one of the main causese of geological disaster. In Lunnan area, Ordovician was buried under 5000 meters, in which natural fractures develop. The formation of natural fractures is controlled by multi-period tectonic movement. By observing and describing the fracture characteristics in cores, the influence on rock mechanical property are analyzed. The factors controlling the natural fractures in the strata are depth, temperature, confined pressure, denudation and filling. The fracturing developing probability and the fracture developing characters are predicted. The mechanism of natural fracture developing in Ordovician in Lunnan area is discussed.
出处
《地质灾害与环境保护》
2002年第4期64-69,共6页
Journal of Geological Hazards and Environment Preservation
基金
九·五国家攻关项目专题(96-111-03-11-4)
关键词
轮南地区
天然裂缝
破裂概率
地质灾害
裂缝预测
Lunnan area
natural fracture
cracking probability
geological disaster
fracture prediction
