基于块系构造的大规模地下爆炸不可逆位移计算方法

李杰; 陈伟; 施存程; 王明洋

doi:10.11883/bzycj-2017-0201

基于块系构造的大规模地下爆炸不可逆位移计算方法

doi: 10.11883/bzycj-2017-0201

李杰^1,,
陈伟^{1, 2},
施存程¹,
王明洋¹

1.
陆军工程大学爆炸冲击防灾减灾国家重点实验室, 江苏南京 210007
2.
军委后勤保障部工程质量监督中心, 北京 100850

基金项目:

国家自然科学基金重大科研仪器研制项目 51527810

国家自然科学基金面上项目 51679249

详细信息

作者简介:
李杰(1981-), 男, 博士, 副教授, lijierf@163.com

中图分类号: O383.1
计量
- 文章访问数: 5449
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- 被引次数: 0
出版历程
- 收稿日期: 2017-06-12
- 修回日期: 2017-10-25
- 刊出日期: 2018-11-25

Calculation method of irreversible displacement region radius based on block hierarchical structure under large-scale underground explosion

1.
State Key Laboratory of Explosion & Impact and Disaster Prevention & Mitigation, Army Engineering University of PLA, Nanjing 210007, Jiangsu, China
2.
Engineering Quality Supervision Center of Logistics Support Department of the Military Commission, Beijing 100850, China

摘要

摘要: 岩体是复杂的等级构造地质体，本文中假设岩体构造符合Sadovsky院士块系构造等级学说，即岩体中存在稳定的不变量λ和μ_△，从而采用简化的分析模型研究构成岩体的岩块在爆炸地冲击扰动作用下的平动和转动，指出Kocharyan激活块体尺度计算式中忽略的条件，重新推导给出了大规模地下爆炸诱发远区局部不可逆位移计算公式。
- 大规模地下爆炸 /
- 岩体块系构造 /
- 等效平均动能 /
- 局部不可逆变形
Abstract: Rock mass is a geological body with a complex hierarchical structure. Based on Sadovsky's concept of block hierarchy, and considering that there are two stable invariants of λ and μ_△ existing in rock mass, a simplified analytical model is established to study the space-limited rotation and translation under the effect of blast shock waves. With the neglected conditions of Kocharyan's works in calculating scales of activated blocks, the calculation formula of irreversible deformation region radius under large-scale underground explosion is re-derived.
- large-scale underground explosion /
- block hierarchy structure /
- equivalent average kinetic energy /
- local irreversible deformation

HTML全文

图 1 岩体的构造等级示意图

Figure 1. Scheme of block hierarchical structures of rock mass

下载: 全尺寸图片幻灯片

图 2 远处块体在冲击波作用下受限运动

Figure 2. Space-limited movement of the blocks under blast wave

下载: 全尺寸图片幻灯片

图 3 扰动作用下岩块间软弱夹层的局部变形

Figure 3. Local deformation of filling material between neighbouring blocks under disturbance

下载: 全尺寸图片幻灯片

图 4 具有层次构造块体激活以后的宏观位移组成

Figure 4. Composition of the macro-displacement

下载: 全尺寸图片幻灯片

表 1 不同岩石的常数值^[18]

Table 1. Parameters of different rocks

岩石类型	花岗岩	盐岩	凝灰岩
A	(1.0~1.3)×10⁴	(0.8~1.0)×10⁴	(0.3~0.4)×10⁴
n	1.60~1.75	1.60	1.60

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表 2 利用公式(23)计算得到的不可逆位移范围

Table 2. Irreversible displacement region radius calculated by Eq.(23)

花岗岩参数				计算结果
A	n	B	m	R_d	v_*/(m·s^-1)
1.0×10⁴	1.65	1.14×10^-5	2.3	1 128	0.09
1.3×10⁴	1.65	1.14×10^-5	2.3	753	0.20
1.3×10⁴	1.70	1.14×10^-5	2.3	1 308	0.07

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