Stability analysis for high-steep slope subjected to repeated blasting vibration
- PDF / 2,262,816 Bytes
- 12 Pages / 595.276 x 790.866 pts Page_size
- 23 Downloads / 182 Views
ORIGINAL PAPER
Stability analysis for high-steep slope subjected to repeated blasting vibration Tingyao Wu 1 & Chuanbo Zhou 1 & Nan Jiang 1 & Yuqing Xia 1 & Yuqi Zhang 1 Received: 14 May 2020 / Accepted: 13 August 2020 # Saudi Society for Geosciences 2020
Abstract Blasting is a necessary means of mining production and engineering construction in China, while landslides and collapses induced by blasting dynamic load often occur. In this paper, shaking table tests, limit equilibrium theory, and least square method were employed to better evaluate the stability of the slope with the fault zone subjected to repeated blasting vibration. The highsteep slope of the Daye iron mine was selected as a case in this paper, and the shaking table test model was established to analyze the change of shear strength of the slope fault zone subjected to repeated blasting vibration. Also, based on the limit equilibrium theory and the shaking table test data, the change of slope stability coefficient under different parameters was studied. Finally, in order to better control the influence of blasting vibration on the slope in the process of blasting excavation, the loading time of blasting vibration for slope failure under different loading amplitudes was predicted. The results showed that the shear strength changed mainly in two forms, the one was that when the vibration loading amplitude was less than or equal to 1.5 cm/s, the shear strength parameters of the fault zone changed mainly in the form of cumulative weakening, but when the loading amplitude was greater than 1.5 cm/s, the change of shear strength parameters of the fault zone was mainly manifested as inertial force failure. Meanwhile, it was worth mentioning that when the loading amplitude was 2.2 cm/s, the loading times of blasting vibration for slope failure was only 2877. Keywords Slope with the fault zone . Blasting vibration . Shear strength . Slope stability
Introduction During the excavation of mining production, blasting, as a fast and crucial excavation method for hard rock mass, has been widely used. The instability problems of slopes with the fault zone have been affected by repeated blasting vibration again and again. To ensure the safety and stability of the slope during the mining blasting excavation, reasonably and properly evaluating the influence of the blasting vibration on the shear strength parameter of the fault zone and controlling safety factor of the slope are key technical issues to realize the safe and efficient construction of the mining production project. A large number
Responsible Editor: Zeynal Abiddin Erguler * Chuanbo Zhou [email protected] 1
Faculty of Engineering, China University of Geosciences, Wuhan 430074, China
of researchers have used different research methods to analyze the causes of slope instability (e.g., Jiang et al. 2019; Cho 2013; Sanchez et al. 2010) and found that the decrease of shear strength and the increase of pore water pressure are the main causes of landslide occurrence by a large number of engineering comparison
Data Loading...
