地质力学学报2018，Vol.24Issue(3)：399-406,8.DOI:10.12090/j.issn.1006-6616.2018.24.03.041
陡倾煤层开采条件下上覆山体变形破坏物理模型试验研究
PHYSICAL MODEL EXPERIMENTAL STUDY ON DEFORMATION AND FAILURE OF OVERLYING ROCK SLOPE UNDER THE CONDITION OF STEEP COAL SEAM MINING
摘要
Abstract
Major rockslide is the main type of geological hazards in the mining mountainous areas of southwestern China.The failure modes and behaviors of this kind of rockslides are complex.Taking the Jiguanling landslide as an example, centrifuge modelling was taken to analyze the failure mechanism of a steep-dip carbonate slope which was induced by goaf in this study.With the model plate of coal seam was pulling out, the overlying strata began to move and dislocate under centrifugal acceleration.The model rock slope failed completely when the model plate was pulled out about 150mm.The experimental results show that the deformation tendency of bending and toppling appeared in steep-dip and layered limestone slopes by gravity.With the underground mining of coal seams, overlying steep-dip and layered rock slope lost its support, then strata got separated and tension fissures were generated.These rock strata were toppled due to severe deformation.The underlying stable rock mass was squeezed by the toppled overlying strata, and shear failure occurred.In the end, the Jiguangling rock slope was failed with the composite mode of toppling-sliding.This study could be a guide of early identification and failure mechanism analysis for major rockslides in mountainous area of southwestern China.关键词
陡倾层状山体/地下采空/失稳破坏/离心模型/倾倒—滑移Key words
steep-dip and layered slope/underground goaf/failure/centrifuge model/toppling-sliding分类
天文与地球科学引用本文复制引用
贺凯,高杨,王文沛,朱赛楠..陡倾煤层开采条件下上覆山体变形破坏物理模型试验研究[J].地质力学学报,2018,24(3):399-406,8.基金项目
国家自然科学基金项目(41702342,41472295) （41702342,41472295）
中国地质科学院地质力学研究所基本科研业务费专项经费资助项目(DZLXJK201610) （DZLXJK201610）
中国地质调查局地质调查项目(DD20160268-4) （DD20160268-4）
