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Wushan Copper Mine North Ore Zone cemented filling stope mechanical properties and the acoustic emission monitoring

Author: GaoWeiHong
Tutor: ZhaoKui；XuCongWu
School: Jiangxi University of Technology
Course: Mining Engineering
Keywords: Filling body Instability Mechanism Acoustic emission Numerical Simulation
CLC: TD325
Type: Master's thesis
Year: 2010
Downloads: 84
Quote: 0
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Abstract


This article is mainly North ore zone orebody mining process for Wushan Copper Mine Roof filling body and the destruction of the surrounding rock instability phenomenon , North ore zone backfill instability instability failure region North ore zone engineering geological survey and site investigation failure mechanism in the form of classification , analysis summed up the dominant factor affecting the North ore zone backfill stability . According to the actual situation of the on-site construction , the FLAC 3D finite difference numerical analysis software roof filling body and surrounding rock stability , stress , displacement variation and its plastic zone . Fully understand the premise of the mechanical properties of the restorations , using acoustic emission continuous monitoring technology backfill stability monitoring , results of analysis by acoustic emission degree of stability of the rock mass and stability of the status quo . This paper made ??the following research : ( 1 ) Underground instability and failure mainly as follows: roof restorations central destruction ; filling body ends on the plate surrounding rock or solid ore body contact area prone to caving accident ; stoping rib soft broken rock , fake roof caving ; filling material segregation . (2 ) for the downhole several instability failure modes , main factors : 1. Orebody occurrence environment, that ore body fracture zones , the development of fault structures , ore body is drawn surrounding rock instability adverse engineering geology interludes , undermine the integrity of the ore body ; external factors , mainly filling the accident and the segregation of the filling material . (3 ) the use of three-dimensional finite difference method of numerical analysis software FLAC 3D simulation of Wushan Copper Mine backfill stope roof and help wall surrounding rock stress , displacement characteristics to discriminate, to reveal the characteristics and deformation law of the filling body and surrounding rock stress monitoring instruments arranged with the choice of supporting ways to provide reference . (4) through on-site monitoring of the monitoring results using acoustic emission event rate , or the rate of energy , the rate of change or the rate of energy change of the acoustic emission event , rock acoustic emission event rate , or the rate of energy relative strength index comprehensive evaluation of the stability of the rock mass . By contrast , we can see the results of the analysis with the actual situation with acoustic emission monitoring backfill stability or a more effective monitoring techniques .

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CLC: > Industrial Technology > Mining Engineering > Mine the pressure and support > Rock pressure and rock movement > Rock movement
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