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Analysis On The Stability Of Stope And Study On The Supporting Method In Yuhuasi Iron Mine

Posted on:2004-03-10Degree:MasterType:Thesis
Country:ChinaCandidate:D YinFull Text:PDF
GTID:2121360122470821Subject:Mining engineering
Abstract/Summary:PDF Full Text Request
Pressure control is the most important matter in the mining planning, mining method experimentation and mining process. Its basic theory includes the control of the distributing laws on the stress and strain of laneway's wall rock in mining activity, and the deformation and failure of extraction structural system, and the control of the negative progress tendency by taking rational measures for the sake of mining system stably and production process safely. In order to finish pressure control effectively, we first understand the ground pressure activation rules fully in the extraction process, we must regularly supervise the ground pressure locally, duly master it emerge occasions in mining works and so prevent the mining system from losing its stability.This paper is based on the production practice of YuHuaSi Iron Mine, and several sections are studied in the paper.In the first chapter, the most factors are analyzed of influencing the convergence of laneway's wall rock by virtue of supervision and survey. Because the system of artificial neural network has characteristics of adaptability, non-linearity, self-study and memorial function, in this paper, BP neural network model is founded for forecasting the convergences of laneway rock mass. After having learnt the sample cases, the problem model is tested by the classified samples and very good predicts results are got.Secondly, the stability of surrounding rock mass with different engineering quality classes is studied. Aiming to be able to select the suitable supporting method according to the specific engineering quality of surrounding rock mass, the finite element analysis is performed. With the help of FEM, the convergences of roadways are studied based on the rock mass quality classification. Meanwhile, the area and the position of plastic zone around the roadway are calculated. That can serve as the theoretical basis of selecting the suitable supporting method.Thirdly, in this paper, a new design method based on above predicts results on shotcrete and bolt support was brought forward and its material design rule was provided after expatiating its mechanics principia and studying on all design methods. Finally, the influencing factors of shotcrete and bolt support are analyzed, and so the improvement measure are advised for YuHuaSi mine.
Keywords/Search Tags:underground pressure, numerical simulation, neural network, shotcrete and bolt support
PDF Full Text Request
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