ROFRAQ: A statistics-based empirical method for assessing accident risk from rockfalls in quarries

Alejano, Leandro R.; Stockhausen, H.W.; Alonso, E.; Bastante, Fernando García; Oyanguren, P. Ramírez

doi:10.1016/j.ijrmms.2008.01.003

Cited by 35 publications

(22 citation statements)

References 11 publications

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“…Many researchers have been dedicated to improve rockfall susceptibility at local and larger scale Crosta and Agliardi, 2003;Jaboyedoff et al, 2005;Copons et al, 2009;Frattini et al, 2008) with different aims and field of applicability: in environmental mining to reduce accidents in quarries (Alejano et al, 2008), to solve rockfall problems along public roads (Schweigl et al, 2003;Guzzetti et al, 2004), or to generally improve land use planning (Abellán et al, 2006).…”

Section: Methods Of Studymentioning

confidence: 99%

Rock cliffs hazard analysis based on remote geostructural surveys: The Campione del Garda case study (Lake Garda, Northern Italy)

et al. 2011

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The town of Campione del Garda (located on the west coast of Lake Garda) and its access road have been historically subject to rockfall phenomena with risk for public security in several areas of the coast. This paper presents a study devoted to the determination of risk for coastal cliffs and the design of mitigation measures. Our study was based on statistical rockfall analysis performed with a commercial code and on stability analysis of rock slopes based on the key block method. Hazard from block kinematics and rockslope failure are coupled by applying the Rockfall Hazard Assessment Procedure (RHAP). Because of the huge dimensions of the slope, its morphology and the geostructural survey were particularly complicated and demanding. For these reasons, noncontact measurement methods, based on aerial photogrammetry by helicopter, were adopted. A special software program, developed by the authors, was applied for discontinuity identification and for their orientation measurements. The potentially of aerial photogrammetic survey in rock mechanic application and its improvement in the rock mass knowledge is analysed in the article.

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Section: Methods Of Studymentioning

confidence: 99%

Rock cliffs hazard analysis based on remote geostructural surveys: The Campione del Garda case study (Lake Garda, Northern Italy)

et al. 2011

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“…The air resistance can be expressed as F 1 = χv 2 , in which χ is the coefficient of resistance, the direction is always opposite with the translation movement [5]. For example, if a sphere moves inclined upwards from the right to the left, meaning the air flows inclined downwards from the left to the right, and meanwhile the sphere rotated clockwise in the vertical plane, the sphere will suffer the Magnus force inclined upwards.…”

Section: Mathematical Model and Analysismentioning

confidence: 99%

Analysis on the Movement of Slungshot and Impact Force

Lu¹,

Zhang²

2017

ENG

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Slungshots can be induced by earthquake, causing heavy damage to people. Preliminary study of this problem was carried out. Firstly, a mathematical model for describing the movement of slungshot was presented based on the theories of rigid body kinematics and aerodynamics. The effects of air drag and the rotation of rock were considered. Secondly, the trail of movement and the velocity were studied based on the presented model, taking the slungshot recorded in the 5.12 earthquake in the Yingxiu County as example. Thirdly, the impact force of the slungshot on the ground was studied. This study provides a reference for the forecast and prevention of the slungshot hazard.

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“…In order to develop accident prevention measures, an interest has recently arisen in the analysis of rocks that become detached from a rock mass in terms of rockfall trajectory, height, velocity and energy. Apart from the software tools that have been developed to estimate rockfall trajectories (Piteau and Clayton 1976;Pfeiffer and Bowen 1989;Rocscience 2004), empirical methods have also been applied to the identification and prioritization of risky and hazardous slopes (Pierson et al 1990;Alejano et al 2008).…”

Section: Rockfalls Involving Granite Bouldersmentioning

confidence: 99%

Assessment of the instability hazard of a granite boulder

et al. 2009

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This paper aims to assess the instability hazard of a granite boulder. The procedure was first to consider the geological setting and geomorphologic features of the boulder in relation to typical granite landscape forms. Climatic and seismic data were next obtained from different sources, and geomechanical parameters were measured in situ and in the laboratory, with terrestrial laser scanning techniques used to measure shape and volume and to conduct a detailed survey of the boulder. Different analytical approaches were then applied to the calculation of boulder safety factors against sliding and toppling. Since the boulder was considered to be unstable in the worst possible scenario, a particle code approach was used to determine its fall trajectory, calculate the final run out of the block, and assess the risk for houses located at the foot of the slope. Finally, conclusions were drawn regarding the instability hazard, and recommendations were made in regard to definitively stabilizing the granite boulder.

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ROFRAQ: A statistics-based empirical method for assessing accident risk from rockfalls in quarries

Cited by 35 publications

References 11 publications

Rock cliffs hazard analysis based on remote geostructural surveys: The Campione del Garda case study (Lake Garda, Northern Italy)

Rock cliffs hazard analysis based on remote geostructural surveys: The Campione del Garda case study (Lake Garda, Northern Italy)

Analysis on the Movement of Slungshot and Impact Force

Assessment of the instability hazard of a granite boulder

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