| 河北宣化赵川地区矿渣碎屑流工程特性及其启动机制 |
| |
| 引用本文： | 李晓乐,杨为民,程小杰,周俊杰,张树轩,吴玉涛,于鸿坤.河北宣化赵川地区矿渣碎屑流工程特性及其启动机制[J].地质力学学报,2019,25(4):554-562. |
| |
| 作者姓名： | 李晓乐 杨为民 程小杰 周俊杰 张树轩 吴玉涛 于鸿坤 |
| |
| 作者单位： | 中国地质科学院地质力学研究所, 北京100081;中兵勘察设计研究院有限公司, 北京100053;活动构造与地壳稳定性评价重点实验室, 北京100081;中国地质科学院地质力学研究所, 北京100081;活动构造与地壳稳定性评价重点实验室, 北京100081;中国地质科学院岩溶地质研究所,广西 桂林,541004;中国地质科学院地质力学研究所, 北京100081;活动构造与地壳稳定性评价重点实验室, 北京100081;中国矿业大学 (北京) , 北京100083;中国地质科学院地质力学研究所, 北京100081;活动构造与地壳稳定性评价重点实验室, 北京100081;中国地质大学 (北京) , 北京100083 |
| |
| 基金项目： | 中国地质调查局地质调查项目（DD20160267） |
| |
| 摘 要： | 张家口宣化地区存在大量具有潜在危险的松散矿渣堆积体，文章以该地区具有代表性的响水沟松散矿渣堆积体为研究对象，对矿渣的颗粒组成、矿物成分、力学性质等进行详细的室内试验研究，结果表明:矿渣堆积体属砾质砂土，粘粒含量少，且级配不良，松散易流动。同一干密度下，随含水率增加，矿渣抗剪强度先增大后减小，当含水率为15%时，其粘聚力最低，表明响水沟矿渣堆积体失稳启动下滑的界限含水率可能在15%左右。综合以上分析结果，拟合得到粘聚力与含水率关系公式，初步预测矿渣碎屑流启动下滑的临界含水率。这一认识对该区矿渣堆积体的稳定性评价及碎屑流灾害预警有重要意义。
|
| 关 键 词： | 矿渣堆积体 碎屑流 含水率 抗剪强度 工程特性 |
| 收稿时间： | 2018/1/4 0:00:00 |
| 修稿时间： | 2018/7/21 0:00:00 |
ENGINEERING CHARACTERISTICS AND START-UP MECHANISM OF SLAG CLASTIC FLOW IN ZHAOCHUAN DISTRICT, XUANHUA |
| |
| LI Xiaole,YANG Weimin,CHENG Xiaojie,ZHOU Junjie,ZHANG Shuxuan,WU Yutao and YU Hongkun.ENGINEERING CHARACTERISTICS AND START-UP MECHANISM OF SLAG CLASTIC FLOW IN ZHAOCHUAN DISTRICT, XUANHUA[J].Journal of Geomechanics,2019,25(4):554-562. |
| |
| Authors: | LI Xiaole YANG Weimin CHENG Xiaojie ZHOU Junjie ZHANG Shuxuan WU Yutao and YU Hongkun |
| |
| Institution: | Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China;China Ordnance Industry Survey and Geotechnical Institute Co., Ltd., Beijing 100053, China;Key Laboratory of Active Tectonics and Crustal Stability Assessment, Beijing 100081, China,Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China;Key Laboratory of Active Tectonics and Crustal Stability Assessment, Beijing 100081, China,Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin 541004, Guangxi, China,Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China;Key Laboratory of Active Tectonics and Crustal Stability Assessment, Beijing 100081, China;China University of Mining & Technology(Beijing), Beijing 100083, China,Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China;Key Laboratory of Active Tectonics and Crustal Stability Assessment, Beijing 100081, China;China University of Geosciences(Beijing), Beijing 100083, China,Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China;Key Laboratory of Active Tectonics and Crustal Stability Assessment, Beijing 100081, China;China University of Geosciences(Beijing), Beijing 100083, China and Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China;Key Laboratory of Active Tectonics and Crustal Stability Assessment, Beijing 100081, China;China University of Mining & Technology(Beijing), Beijing 100083, China |
| |
| Abstract: | There are a large number of potentially dangerous loose slag accumulation bodies in Xuanhua area of Zhangjiakou. The representative Xiangshuigou loose slag accumulation bodies in the area is taken as the research object, and the laboratory tests are made on particle composition, mineral composition and mechanical properties. The test results show that the slag accumulation bodies belong to gravel sand with less clay content and poor gradation, loose and easy to flow. At the same dry density, the shear strength of slag increases first and then decreases with the increase of moisture content. When the moisture content is 15%, the cohesive force is the lowest, indicating that the limit moisture content of the slag accumulation bodies in Xiangshuigou may be around 15% at the beginning of the decline of instability. Based on the above analysis results, the formula of the relationship between cohesive force and water content is obtained by fitting, and the limit water content of the initial slide of clastic flow is predicted. This conclusion is of great significance to the stability evaluation of slag accumulation body and the early warning of clastic flow in this area. |
| |
| Keywords: | slag accumulation body clastic flow water content shear strength engineering property |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《地质力学学报》浏览原始摘要信息 |
| 点击此处可从《地质力学学报》下载免费的PDF全文 |
|
