露天轉(zhuǎn)地下掛幫礦開采邊坡穩(wěn)定性及失穩(wěn)模式研究
發(fā)布時間:2018-08-09 08:03
【摘要】:為研究露天轉(zhuǎn)地下掛幫礦的開采工作面傾角的布置方式對工作面上覆巖體應(yīng)力與邊坡失穩(wěn)破壞模式的影響,以海南礦業(yè)公司露天邊坡掛幫礦井采為例,采用理論計算和數(shù)值模擬相結(jié)合的方法對其進(jìn)行了分析。結(jié)果表明:露天邊坡下開采時工作面傾角的布置對邊坡穩(wěn)定性影響顯著;工作面傾角由30°到-30°逐漸減小的過程中,工作面上覆巖體及露天邊坡臺階變形量越大,邊坡內(nèi)上覆巖體內(nèi)剪切應(yīng)力集中程度和最大主應(yīng)力集中程度越來越高,邊坡失穩(wěn)破壞的趨勢增強(qiáng);邊坡圍巖上部壓力拱成拱機(jī)制較弱,開采工作面右端位移臨界區(qū)域巖體的抗剪強(qiáng)度對邊坡整體穩(wěn)定性起到關(guān)鍵作用;露天邊坡下開采邊坡巖體不同區(qū)域可能發(fā)生的失穩(wěn)破壞模式主要為張拉破壞—垮落破壞—剪切滑移破壞—剪切錯動破壞—擠壓鼓脹破壞。
[Abstract]:In order to study the influence of the arrangement of inclined angle on the stress of overlying rock mass and the failure mode of slope instability in the mining face of open pit to underground hanging slope, a case study was made in Hainan Mining Company. The method of theoretical calculation and numerical simulation is used to analyze it. The results show that the inclined angle of the working face has a significant effect on the stability of the slope when mining under the open-pit slope, and the larger the deformation of the overlying rock mass and the step of the open-pit slope is in the process of gradually decreasing the slope angle from 30 擄to -30 擄. The shear stress concentration degree and the maximum principal stress concentration degree in the overburden rock of the slope are higher and higher, the tendency of the slope instability and failure is enhanced, and the arch mechanism of the pressure arch in the upper wall rock of the slope is relatively weak. The shear strength of the rock mass in the critical region of the displacement at the right end of the mining face plays a key role in the overall stability of the slope. The possible failure modes of rock mass in different regions of mining slope under open-pit slope are tensile failure, collapse failure, shear slip failure, shear dislocation failure and extrusion bulging failure.
【作者單位】: 北京科技大學(xué)土木與資源工程學(xué)院;煤炭科學(xué)研究總院建井研究分院;鄂爾多斯市營盤壕煤炭有限公司;海南礦業(yè)股份有限公司;
【基金】:國家自然科學(xué)基金重點(diǎn)項目(編號:51534002) 國家重點(diǎn)研發(fā)計劃項目(編號:2016YFC0600801)
【分類號】:TD854.6
本文編號:2173444
[Abstract]:In order to study the influence of the arrangement of inclined angle on the stress of overlying rock mass and the failure mode of slope instability in the mining face of open pit to underground hanging slope, a case study was made in Hainan Mining Company. The method of theoretical calculation and numerical simulation is used to analyze it. The results show that the inclined angle of the working face has a significant effect on the stability of the slope when mining under the open-pit slope, and the larger the deformation of the overlying rock mass and the step of the open-pit slope is in the process of gradually decreasing the slope angle from 30 擄to -30 擄. The shear stress concentration degree and the maximum principal stress concentration degree in the overburden rock of the slope are higher and higher, the tendency of the slope instability and failure is enhanced, and the arch mechanism of the pressure arch in the upper wall rock of the slope is relatively weak. The shear strength of the rock mass in the critical region of the displacement at the right end of the mining face plays a key role in the overall stability of the slope. The possible failure modes of rock mass in different regions of mining slope under open-pit slope are tensile failure, collapse failure, shear slip failure, shear dislocation failure and extrusion bulging failure.
【作者單位】: 北京科技大學(xué)土木與資源工程學(xué)院;煤炭科學(xué)研究總院建井研究分院;鄂爾多斯市營盤壕煤炭有限公司;海南礦業(yè)股份有限公司;
【基金】:國家自然科學(xué)基金重點(diǎn)項目(編號:51534002) 國家重點(diǎn)研發(fā)計劃項目(編號:2016YFC0600801)
【分類號】:TD854.6
【相似文獻(xiàn)】
相關(guān)期刊論文 前6條
1 呂世宏,黃維軍,周翔,喬中棟;綜采工作面傾角與采高及挖底量的控制技術(shù)和應(yīng)用[J];煤炭科學(xué)技術(shù);2004年04期
2 張洪亮;;大傾角不等長斜機(jī)巷綜采放頂煤工作面開采技術(shù)[J];能源技術(shù)與管理;2011年05期
3 李春元;張勇;司艷龍;石亮;張西斌;劉傳安;;工作面傾角對含硬煤夾層頂煤放煤方式的影響[J];煤炭科學(xué)技術(shù);2011年09期
4 蔡祥雷,曹書亮;對偽傾斜開采的幾點(diǎn)認(rèn)識及建議[J];礦業(yè)安全與環(huán)保;2003年06期
5 劉安豐;徐方;;下行抽架在大傾角綜采工作面的應(yīng)用[J];安徽科技;2012年03期
6 張紅義;;大傾角綜放工作面上竄下滑的原因及防治[J];中國煤炭工業(yè);2011年02期
相關(guān)重要報紙文章 前1條
1 李繼峰;錢營孜礦全力開采“巨無霸”斷層[N];中國礦業(yè)報;2013年
,本文編號:2173444
本文鏈接:http://sikaile.net/kejilunwen/kuangye/2173444.html
最近更新
教材專著