埋深对恐龙化石的影响效果研究

Study on the Effect of Burial Depth on Dinosaur Fossils

摘要:

已发现的恐龙化石大多数埋藏在不同深度的地层中，不同埋深化石所受风化破坏程度不尽相同。为深入研究恐龙化石的风化机理，探究恐龙化石的保护措施和方法，重点分析埋深产生的侧向压力对恐龙化石强度和破坏特性的影响。通过有限差分软件FLAC3D进行数值模拟，揭示埋深因素对恐龙化石保存的影响程度。试验结果表明：围岩对恐龙化石施加的侧向压力是影响恐龙化石变形和强度特性的一个重要因素。在弹性变形阶段，恐龙化石的初始强度、峰值强度随侧向压力的增大而不断增大。当应力超过了恐龙化石极限强度后进入塑性变形，其初始强度、峰值强度逐渐减小，最终达到残余强度。

Abstract:

At present, most of the dinosaur fossils have been found buried in the strata of different depths. In order to deeply study the weathering mechanism of dinosaur fossils and explore the protection measures and methods of dinosaur fossils, the influence of lateral pressure generated by burial depth on the strength and destruction characteristics of dinosaur fossils has been analyzed. Finite difference software FLAC3D has been used for numerical simulation to reveal the impact of burial depth on dinosaur fossil preservation. It is showed that the lateral pressure exerted by the surrounding rock is an important factor affecting the deformation and strength of dinosaur fossils. In the elastic deformation stage, the initial strength and peak strength of dinosaur fossils increase with the increase of lateral pressure. When the stress exceeds the ultimate strength of dinosaur fossils, it enters the plastic deformation, and its initial strength and peak strength gradually decrease, and finally reach the residual strength.