爆破荷载下岩质边坡裂隙区范围测试方法*

doi:10.16265/j.cnki.issn1003-3033.2022.08.1682

中国安全科学学报 ›› 2022, Vol. 32 ›› Issue (8): 104-110.doi: 10.16265/j.cnki.issn1003-3033.2022.08.1682

爆破荷载下岩质边坡裂隙区范围测试方法*

王智德¹(), 李杰¹, 武海港¹, 马祖遥¹^,²

¹ 武汉理工大学土木工程与建筑学院,湖北武汉 430070
² 珠海市规划设计研究院,广东珠海 519000

收稿日期:2022-02-16 修回日期:2022-05-12 出版日期:2022-09-05 发布日期:2023-02-28
作者简介:
王智德 (1983—),男,湖南湘乡人,博士,副教授,主要从事顺层岩质边坡爆破稳定性评价方面的研究。E-mail: wangzhide-wuhan@whut.edu.cn。
基金资助:
国家自然科学基金资助(51374163); 武汉市城乡建设委员会科技计划项目(武城建[2017]12号-201740,武城建[2019]68号-201941); 磷资源开发利用教育部工程研究中心开放基金资助(LKF202004)

Test method of fractured area of rock slopes under blasting load

WANG Zhide¹(), LI Jie¹, WU Haigang¹, MA Zuyao¹^,²

¹ School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan Hubei 430070, China
² Zhuhai Institute of Urban Planning & Design, Zhuhai Guangdong 519000, China

Received:2022-02-16 Revised:2022-05-12 Online:2022-09-05 Published:2023-02-28

摘要/Abstract

摘要：

为提高露天矿山爆破过程中的安全性,提出一种基于预埋测试棒确定岩石爆破裂隙区范围的方法;基于爆炸应力波通过结构面传播理论及现有爆破裂隙区范围研究成果,确定测试棒材料的选取方法,并给出制作步骤和测试流程;开展现场爆破测试,根据爆破后测试棒的断裂范围获取爆破裂隙区的范围,并分别采用理论解析方法、数值分析和现场振动速度监测等方法验证爆破试验测试结果。结果表明:采用预埋测试棒的方法获取岩石爆破裂隙区范围,理论上可行;10 kg药量爆破荷载作用下,岩质边坡裂隙区最大水平半径为2.95 m;3种方法与现场试验测试所得结果相对误差分别小于24.8%、18%和4%。

关键词: 爆破荷载, 测试方法, 岩质边坡, 爆破裂隙区范围, Mises屈服准则, 测试棒

Abstract:

In order to improve safety of open pit mines during blasting, a determination method of rock blast fracture area was proposed based on embedded test rod. Selection method of test rod material was determined based on propagation theory of explosion stress wave through structural plane and research results of existing explosion rupture gap area, and manufacturing steps and test procedures were provided. Then, blasting test was carried out on site, and range of blasting gap was obtained according to fracture range of test rods, and test results were verified by theoretical analysis method, numerical analysis, and on-site vibration velocity monitoring method. The results show that it is theoretically feasible to obtain fracture area of blasted rock by using embedded test rod, and the maximum horizontal radius of rock slope fracture zone under 10 kg blasting load is 2.95 m. At the same time, the relative errors of three methods and results obtained by field test are less than 24.8%, 18% and 4% respectively.

Key words: blasting load, test method, rock slope, range of blasting fracture zone, Mises yield criterion, test rod

王智德, 李杰, 武海港, 马祖遥. 爆破荷载下岩质边坡裂隙区范围测试方法*[J]. 中国安全科学学报, 2022, 32(8): 104-110.

WANG Zhide, LI Jie, WU Haigang, MA Zuyao. Test method of fractured area of rock slopes under blasting load[J]. China Safety Science Journal, 2022, 32(8): 104-110.

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ω	弹性模量 E₂/GPa	泊松比 μ₂	ρ₂/ (kg·m^-3)	σ_c/MPa
0.7	2.31	0.250	1 408.8	4.08
1.0	1.49	0.198	1 127.1	1.65
1.3	1.23	0.169	1 015.4	1.25

ω	n	K	σ_cd2/MPa	σ_cd2/σ_td1
0.7	5.10	0.327	18.930	0.566
1.0	7.09	0.247	7.656	0.229
1.3	8.20	0.217	5.800	0.173

爆破荷载下岩质边坡裂隙区范围测试方法*

Test method of fractured area of rock slopes under blasting load

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