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

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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