辽宁工程技术大学学报（自然科学版）2011，Vol.30Issue(2)：186-189,4.
沉积层厚度对逆冲断层破裂扩展特征影响数值模拟
Numerical simulation on thrust fault's extension feature under sedimentary thickness' influence
摘要
Abstract
For further revealing the feature of thrust fault's rupture and extension, using numerical simulating, the feature of the thrust fault's extension was researched at different sedimentary thickness when fault dip is 45°. The main conclusions are as follows: (1) Increasing with sedimentary thickness, the fault movement transmits from bottom to up part weakly along the fault-dip direction, the contact point's force is the largest. As thickness increasing, deformation reduces in vertical direction and translates into horizontal direction, even influence range in horizontal direction increases gradually.(2) Thrust fault's rupture and extension feature is divided into three forms by the critical thickness δ1,δ2.When sedimentary thickness is less than δ1, bedrock fault extends to sedimentary surface and form rupture zone on surface; when sedimentary thickness is more than δ2, bedrock fault extends to sedimentary bottom, its displacement is absorbed by the sedimentary; when sedimentary thickness is betweenδ1 and δ2, bedrock fault extends to sedimentary bottom and form tension rupture zone on the surface. The numerical results imply that the sedimentary thickness plays important role in thrust fault's rupture and extension.The results obtained in this paper are valuable for further understanding the characteristics of surface deformation caused by thrust fault.关键词
沉积层厚度/逆冲断层/破裂扩展/变形/数值模拟Key words
sedimentary thickness/ thrust fault/ rupture and extension/ deformation/ numerical simulation分类
天文与地球科学引用本文复制引用
孙平远,宫少琦,代树红..沉积层厚度对逆冲断层破裂扩展特征影响数值模拟[J].辽宁工程技术大学学报（自然科学版）,2011,30(2):186-189,4.基金项目
国家自然科学基金青年科学基金项目资助(41002075) （41002075）
辽宁省教育厅高校科研基金项目资助(20060380) （20060380）
