深埋背斜軟層巷道圍巖穩(wěn)定性演化規(guī)律研究
發(fā)布時間:2019-06-05 05:21
【摘要】:針對深埋背斜構(gòu)造軟巖地層巷道圍巖的穩(wěn)定性問題,通過70組數(shù)值模型并結(jié)合現(xiàn)場試驗,研究了在深埋背斜構(gòu)造的軟巖地層中開挖巷道后,圍巖穩(wěn)定性表征變量隨應(yīng)力場和巷道軸向布置角度α變化的演化規(guī)律,揭示了深埋背斜構(gòu)造軟巖地層中巷道位置布置與軸向角度設(shè)計對巷道圍巖的穩(wěn)定性影響。結(jié)果表明:1)背斜構(gòu)造中巷道布置位置和軸向布置角度α的變化均對圍巖穩(wěn)定性產(chǎn)生明顯影響,且后者的影響更加顯著;2)背斜構(gòu)造中兩翼處的圍巖穩(wěn)定性高于脊線附近,在進行巷道布置設(shè)計時,應(yīng)綜合考慮位置與軸向角度對圍巖穩(wěn)定性的影響,并將巷道布置在有利于圍巖穩(wěn)定的一側(cè)。
[Abstract]:Aiming at the stability of roadway surrounding rock in soft rock strata of deep buried anticlinal structure, the excavation of roadway in soft rock strata of deep buried anticlinal structure is studied by means of 70 sets of numerical models and field tests. The evolution law of surrounding rock stability characterization variables with stress field and roadway axial arrangement angle 偽 reveals the influence of roadway position arrangement and axial angle design on the stability of roadway surrounding rock in soft rock strata of deep buried anticlinal structure. The results show that: 1) the change of roadway layout position and axial arrangement angle 偽 in anticlinal structure has obvious influence on the stability of surrounding rock, and the influence of the latter is more significant; 2) the stability of surrounding rock in the middle wing of anticlinal structure is higher than that near the ridge line. In the design of roadway layout, the influence of position and axial angle on the stability of surrounding rock should be considered comprehensively, and the roadway should be arranged on the side which is beneficial to the stability of surrounding rock.
【作者單位】: 煤炭科學(xué)研究總院開采研究分院;中國礦業(yè)大學(xué)深部巖土力學(xué)與地下工程國家重點實驗室;江蘇建筑職業(yè)技術(shù)學(xué)院;
【基金】:國家自然科學(xué)基金項目(51574223) 江蘇自然科學(xué)基金項目(BK20160208) 江蘇省創(chuàng)新計劃項目(KYLX15_1403)
【分類號】:TD322.4
本文編號:2493289
[Abstract]:Aiming at the stability of roadway surrounding rock in soft rock strata of deep buried anticlinal structure, the excavation of roadway in soft rock strata of deep buried anticlinal structure is studied by means of 70 sets of numerical models and field tests. The evolution law of surrounding rock stability characterization variables with stress field and roadway axial arrangement angle 偽 reveals the influence of roadway position arrangement and axial angle design on the stability of roadway surrounding rock in soft rock strata of deep buried anticlinal structure. The results show that: 1) the change of roadway layout position and axial arrangement angle 偽 in anticlinal structure has obvious influence on the stability of surrounding rock, and the influence of the latter is more significant; 2) the stability of surrounding rock in the middle wing of anticlinal structure is higher than that near the ridge line. In the design of roadway layout, the influence of position and axial angle on the stability of surrounding rock should be considered comprehensively, and the roadway should be arranged on the side which is beneficial to the stability of surrounding rock.
【作者單位】: 煤炭科學(xué)研究總院開采研究分院;中國礦業(yè)大學(xué)深部巖土力學(xué)與地下工程國家重點實驗室;江蘇建筑職業(yè)技術(shù)學(xué)院;
【基金】:國家自然科學(xué)基金項目(51574223) 江蘇自然科學(xué)基金項目(BK20160208) 江蘇省創(chuàng)新計劃項目(KYLX15_1403)
【分類號】:TD322.4
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