河北宣化赵川地区矿渣碎屑流工程特性及其启动机制

李晓乐; 杨为民; 程小杰; 周俊杰; 张树轩; 吴玉涛; 于鸿坤

doi:10.12090/j.issn.1006-6616.2019.25.04.054

河北宣化赵川地区矿渣碎屑流工程特性及其启动机制

doi: 10.12090/j.issn.1006-6616.2019.25.04.054

李晓乐^{1, 2, 3,},
杨为民^{1, 3, ,},
程小杰⁴,
周俊杰^{1, 3, 5},
张树轩^{1, 3, 6},
吴玉涛^{1, 3, 6},
于鸿坤^{1, 3, 5}

1.
中国地质科学院地质力学研究所, 北京 100081
2.
中兵勘察设计研究院有限公司, 北京 100053
3.
活动构造与地壳稳定性评价重点实验室, 北京 100081
4.
中国地质科学院岩溶地质研究所, 广西桂林 541004
5.
中国矿业大学(北京), 北京 100083
6.
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

详细信息

作者简介:
李晓乐(1993-), 男, 在读硕士, 从事灾害地质、工程地质方面的研究。E-mail:lixiaole_1993@163.com

通讯作者:
杨为民(1965-), 男, 研究员、博士, 从事地质灾害、工程地质及岩土工程方面的研究。E-mail:snon_72@163.com

中图分类号: P642.2
计量
- 文章访问数: 218
- HTML全文浏览量: 118
- PDF下载量: 7
- 被引次数: 0
出版历程
- 收稿日期: 2018-01-04
- 修回日期: 2018-07-21
- 刊出日期: 2019-08-01

ENGINEERING CHARACTERISTICS AND START-UP MECHANISM OF SLAG CLASTIC FLOW IN ZHAOCHUAN DISTRICT, XUANHUA

LI Xiaole^{1, 2, 3
,},
YANG Weimin^{1, 3
, ,},
CHENG Xiaojie⁴,
ZHOU Junjie^{1, 3, 5},
ZHANG Shuxuan^{1, 3, 6},
WU Yutao^{1, 3, 6},
YU Hongkun^{1, 3, 5}

1.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China
2.
China Ordnance Industry Survey and Geotechnical Institute Co., Ltd., Beijing 100053, China
3.
Key Laboratory of Active Tectonics and Crustal Stability Assessment, Beijing 100081, China
4.
Institute of Karst Geology, Chinese Academy of Geological Sciences, Guilin 541004, Guangxi, China
5.
China University of Mining & Technology(Beijing), Beijing 100083, China
6.
China University of Geosciences(Beijing), Beijing 100083, China

摘要

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。
- 矿渣堆积体 /
- 碎屑流 /
- 含水率 /
- 抗剪强度 /
- 工程特性
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.
- slag accumulation body /
- clastic flow /
- water content /
- shear strength /
- engineering property
注释:

责任编辑:吴芳

HTML全文

图 1 宣化赵川地区地质简图

Figure 1. Geological sketch of Zhaochuan district, Xuanhua

下载: 全尺寸图片幻灯片

图 2 赵川地区矿渣堆积体、矿坑、尾矿库分布图

Figure 2. Distribution of slag accumulation bodies, pits and tailings reservoirs in Zhaochuan district

下载: 全尺寸图片幻灯片

图 3 响水沟矿渣堆积体特征

a—矿渣堆积体沿坡面向下滑动；b—矿渣堆积体顶部拉裂缝；c—坡脚处冲积扇呈软塑状；d—矿渣堆积体阻塞道路

Figure 3. Characteristics of slag accumulation bodies in Xiangshuigou

下载: 全尺寸图片幻灯片

图 4 矿渣颗粒分析试验曲线

Figure 4. Curve of particle analysis experiment

下载: 全尺寸图片幻灯片

图 5 矿渣中粘土矿物粉晶衍射图

Figure 5. The X-ray powder diffraction data of clay minerals in slag

下载: 全尺寸图片幻灯片

图 6 响水沟矿渣堆积体不同含水率下抗剪强度变化曲线

Figure 6. Shear strength variation curves of slag accumulation bodies under different water contents

下载: 全尺寸图片幻灯片

图 7 响水沟矿渣堆积体不同干密度下抗剪强度变化曲线

Figure 7. Shear strength variation curves of slag accumulation bodies under different dry densities

下载: 全尺寸图片幻灯片

表 1 宣化赵川地区大型矿渣堆积体统计

Table 1. Statistics of large slag accumulation bodies in Zhaochuan district, Xuanhua

矿渣堆积位置	分布面积/km²	平面形态	展布方向
河阳沟村北东	0.675	不规则状	北东向
小古城南	0.590	不规则状	北东向
辛丈子村东	0.437	不规则状	北东向
河阳沟村南	0.357	不规则状	北西向
张家窑南西	0.350	纺锤状	北西向
四台咀村南西	0.328	不规则状	北西向
响水沟北	0.308	不规则状	北东向
韩家沟北	0.292	蠕虫状	北西向
小古城西	0.270	矩形	北西向
涧河口村北西	0.262	三角形	北东向
行人马沟北	0.250	不规则状	北东向
小蛤蟆口村南	0.201	蠕虫状	北东向
红庙湾村北	0.194	棱角状	北西向
河阳口村南西	0.187	三角形	北西向
关底村南	0.183	不规则状	北西向
杨家营村北	0.179	蠕虫状	北东向
响水沟内	0.176	不规则状	北西向
南窝铺南东	0.168	不规则状	北西向
四台咀村南	0.167	菱形	北东向
黄土坡村北西	0.162	不规则状	北西向

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