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Analysis of predictor equations for determining the blast-induced vibration in rock blasting

International Journal of Mining Science and Technology 2019年第6期29卷 905-915页

作者： marilena cardu Dario Coragliotto Pierpaolo Oreste DIATI Politecnico di Torino 10129 TorinoItaly IGG-CNR Torino 10129Italy Lochaline Quartz Sand Ltd. Lochaline MinePA805LQ MorvernScotlandUnited Kingdom

The paper proposes a new empirical correlation designed to complement the‘‘site laws"currently used to evaluate the attenuation in the rock masses of vibrations induced by rock *** formula contains a deformed exponential known as the K-exponential,which seems to well represent a large number of both natural and artificial phenomena ranging from astrophysics to quantum mechanics,with some extension in the field of economics and *** validation of the formula was performed via the analysis of vibration data covering a number of case studies,which differed in terms of both operation and rock type.A total of 12 experimental cases were analysed and the proposed formulation exhibited a good performance in 11 of *** particular,the proposed law,which was built using blast test data,produced very good approximations of the points representing the vibration measurements and would thus be useful in organising production ***,the developed formula was found to work less well when a correlation obtained for a given site was applied to another presenting similar types of rocks and operations,and thus should not be employed in the absence of measurements from test data.

关键词： Rock blasting Vibrations Predictor equation Site law K-statistics K-exponential

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Complexity analysis of blast-induced vibrations in underground mining: A case study

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International Journal of Mining Science and Technology 2012年第1期22卷 125-131页

作者： cardu marilena Dompieri Mauricio Seccatore Jacopo Department of Land Environment and Geotechnology (DITAG) Corso Duca degli Abruzzi IGAG C.N.R. Corso Duca degli Abruzzi Ontonix Brasil Rua Madre Rita Amada de Jesus Sao Paulo Brazil Mining and Petroleum Engineering Department University of Sao Paulo Sao Paulo Brazil

Blasting in geological bodies is an industrial process acting in an environment characterized by high uncertainties (natural joints, faults, voids, abrupt structural changes), which are transposed into the process parameters (e.g. energetic transfer to rock mass, hole deviations, misfires, vibrations, fly-rock, etc.). The approach to this problem searching for the "optimum" result can be ineffective. The geological environment is marked out by too many uncertainties, to have an "optimum" suitable to different applications. Researching for "Robustness" in a blast design gives rise to much more efficiency. Robustness is the capability of the system to behave constantly under varying conditions, without leading to unexpected results. Since the geology varies from site to site, setting a robust method can grant better results in varying environments, lowering the costs and increasing benefits and safety. Complexity Analysis (C.A.) is an innovative approach to systems. C.A. allows analyzing the Complexity of the Blast System and the criticality of each variable (drilling, charging and initiation parameters). The lower is the complexity, the more robust is the system, and the lower is the possibility of unexpected results. The paper presents the results obtained thanks to the C.A. approach in an underground gypsum quarry (Italy), exploited by conventional rooms and pillars method by drilling and blasting. The application of C.A. led to a reliable solution to reduce the charge per delay, hence reducing the impact of ground vibration on the surrounding structures. The analysis of the correlation degree between the variables allowed recognizing empirical laws as well.

关键词：复杂性分析地下开采爆破地质体高炉系统震动爆炸环境特点地面振动

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Vibrations and Stresses Induced in the Rock by the Detonating Cord Splitting of Dimension Stone Blocks

Vibrations and Stresses Induced in the Rock by the Detonatin...

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The Seventh International Symposium on Rock Fragmentation by Blasting

作者： Renato MANCINI marilena cardu Luigi GARIBALDI Alessandro FASANA Dipartimento di Georisorse e Territorio Politecnico di Torino-Italy CNR FIRGET Torino-Italy Dipartimento di Georisorse e Territorio Politecnico di Torino-Italy CNR FIRGET Torino-Italy Dipartimento di Meccanica Politecnico di Torino-Italy Dipartimento di Meccanica Politecnico di Torino-Italy

＜正＞ Detonating cord splitting is a quite common production method for dimension stone blocks, in granite and gneiss quarries, where the blasts are usually designed on the basis of local *** paper relates on a vibrometric test campaign, carried on in a group of gneiss quarries by means of accelerometric measurements at close proximity to the splitting holes rows, both in primary splitting and in recutting operations. Main objectives of the campaign are:- to detect, or to exclude, the possibility of impairment of the commercial stone blocks produced by this method;- to check the validity of the blast design criteria adopted by the quarries;- to obtain experimental data for predicting the friction conditions at the boundaries of the block and its expected displacement.

关键词： Dimension stone blocks Detonating cord Splitting by explosive Vibrations

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TECHNICAL AND ECONOMIC ASPECTS OF TUNNEL BLASTING ACCURACY CONTROL

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爆破 1994年第1期 8-22页

作者： Renato MANCINI vannt BADIN0 Nicola INNAURAT0 Mauro FORNAR0, marilena cardu Gian Luca BALDO Gahriele BORLA(DIGET-Politecnico di Torino,ltaly)(DIGET-Politecnico di Torino and CSPM,C.N.R.,Torino,Italy)

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