华东矿区深厚黏土层自重沉降模拟分析  

Simulation Analysis on Self-weight Sedimentation of Deep Thick Clay Layer in East China Mining Area

作　　者：刁志翔 商翔宇 王奇石[1] 朱启银 周国庆[2] DIAO Zhixiang;SHANG Xiangyu;WANG Qishi;Zhu Qiyin;Zhou Guoqing(School of Mechanics and Civil Engineering,China University of Mining and Technology,Xuzhou 221116,China;State Key Laboratory for Deep Geomechanics and Underground Engineering,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]中国矿业大学力学与土木工程学院,徐州221116 [2]中国矿业大学深部岩土力学与地下工程国家重点实验室,徐州221116

出　　处：《建井技术》2022年第1期60-66,共7页Mine Construction Technology

基　　金：国家自然科学基金项目(51009136,51504245);111计划项目(B14021)。

摘　　要：华东矿区上覆有厚表土地层,该区域存在立井井筒周围地表长期持续沉降的问题。此沉降是否可能含有深厚黏土层尚未完全稳定的自重固结贡献值得怀疑。结合文献中华东矿区地层地质资料,基于Gibson大变形固结理论对深厚黏土地层自重固结过程进行了计算研究,分析了不同地层厚度与地层埋深对自重固结沉降量和固结时间的影响。结果表明:对于埋深超过150 m、土层厚度小于百米的黏土地层,由于其地质年代普遍早于中更新世,其自重固结变形已经完全稳定;而对于埋深为75 m、厚度超过77 m的黏土地层,其地质年代可能处于中更新世的尾段,存在自重固结尚未完成的可能,但其导致的年沉降量较小。There is a thick surface soil stratum on the overlying stratum in East China mining area.In this mining area,a long tern sustained sedimentation problem existed in the ground surface surrounded around the mine shaft.The sedimentation whether could have a yet completed stable self-weight consolidation contribution value of the deep thick clay which could be suspected.Combined with the stratum and geological information in East China Mining Area,based on the Gibson large deformation consolidation theory,a calculation study was conducted on the different stratum thickness and the stratum depth affected to the self-weight consolidation sedimentation amount and the consolidation time.The result showed that as for the clay stratum with a depth over 150 m and a thickness less than 100 m,due the geologic age generally early than the Middle Pleistocene,thus the self-weight consolidation deformation was fully stable.As for the clay stratum with a depth of 75 m and a thickness over 77 m,the geologic age could possibly be at the end of the Middle Pleistocene,the self-weight consolidation possibly was not completed and could cause a lower annual sedimentation.

关 键 词：深厚黏土 自重固结 沉降 数值模拟 

分 类 号：P642.26[天文地球—工程地质学]