本文選題：楔形滑坡 + NPR恒阻大變形錨索��； 參考：《煤炭學(xué)報(bào)》2017年12期

【摘要】：近些年,南芬露天鐵礦開采深度越來(lái)越大,局部已經(jīng)形成552 m高邊坡(標(biāo)高142~694 m)。由于主采場(chǎng)斷面呈"V"字型展布,采場(chǎng)底部空間日益狹小,滾石和滑坡災(zāi)害有效避險(xiǎn)空間喪失,嚴(yán)重威脅人員和機(jī)械的安全。針對(duì)上述問(wèn)題,礦山啟動(dòng)了三期擴(kuò)幫四期開采工程,受老滑坡體影響,下盤擴(kuò)幫過(guò)程中連續(xù)3年發(fā)生了多次局部滑坡災(zāi)害。針對(duì)"2016-1101滑坡"深部滑動(dòng)力監(jiān)測(cè)預(yù)警曲線進(jìn)行分析,結(jié)合現(xiàn)場(chǎng)調(diào)查,判斷其滑坡成因和破壞模式;采用赤平極射投影法分析了滑坡發(fā)生機(jī)理和滑坡體安全系數(shù);利用FLAC3D中的Fish語(yǔ)言構(gòu)建了具有負(fù)泊松比特性的恒阻大變形錨索(NPR)數(shù)值分析模型,并對(duì)"2016-1101滑坡"進(jìn)行數(shù)值建模分析,將實(shí)際監(jiān)測(cè)結(jié)果和模擬結(jié)果進(jìn)行對(duì)比,發(fā)現(xiàn)二者具有顯著的一致性,為其他類似邊坡的滑坡機(jī)理分析和數(shù)值模擬計(jì)算提供了理論和實(shí)踐依據(jù)。
[Abstract]:In recent years, the mining depth of Nanfen opencast iron mine is more and more deep. As the section of the main stope is "V" shaped, the space at the bottom of the stope is becoming narrower and narrower, and the effective risk avoidance space for rolling stones and landslide disasters is lost, which seriously threatens the safety of personnel and machinery. In view of the above problems, the mine started three stages of expansion and four stages of mining engineering. Affected by the old landslide, several local landslide disasters occurred in the process of down-wall expansion for three consecutive years. Based on the analysis of "2016-1101 landslide" deep landslide dynamic monitoring and warning curve, combined with on-the-spot investigation, the causes and failure mode of landslide are judged, and the landslide occurrence mechanism and landslide safety coefficient are analyzed by using Chi-plane projection method. The numerical analysis model of large deformation anchor cable with constant resistance and large deformation with negative Poisson's ratio is constructed by using Fish language in FLAC3D. The numerical model of "2016-1101 landslide" is modeled and analyzed, and the actual monitoring results are compared with the simulation results. It is found that there is significant consistency between them, which provides theoretical and practical basis for landslide mechanism analysis and numerical simulation of other similar slopes.
【作者單位】： 中國(guó)礦業(yè)大學(xué)(北京)深部巖土力學(xué)與地下工程國(guó)家重點(diǎn)實(shí)驗(yàn)室;紹興文理學(xué)院巖石力學(xué)與地質(zhì)災(zāi)害實(shí)驗(yàn)中心;中國(guó)礦業(yè)大學(xué)(北京)力學(xué)與建筑工程學(xué)院;本溪鋼鐵集團(tuán)南芬露天鐵礦;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(41502323,41602308) 浙江省山體地質(zhì)災(zāi)害防治協(xié)同創(chuàng)新中心開放基金資助項(xiàng)目(PCMGH-2016-Z-02)
【分類號(hào)】：P642.22;TD854.6;TD861.1

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