CAJ | 학술논문

针对弓长岭露天铁矿含空区边坡稳定性问题，考虑不同大小、位置空区对边坡稳定的影响，利用FLAC和Geo-slope软件，分别模拟3种情况(包括36种情形)下边坡的稳定性：①不含空区；②空区分别位于边坡上部、中部、下部和坡角底部，这些空区距坡面的距离固定，改变空区的宽度；③空区大小确定，改变空区距坡面的距离。通过对比不同宽度、位置空区的边坡塑性区、位移云图和安全系数来分析空区对边坡稳定性的影响规律。结果表明：上部空区的存在有利于边坡整体稳定，但是影响边坡的局部稳定；中部空区的存在对边坡稳定性影响比较复杂，既有对边坡稳定有利的情况，也有对边坡稳定不利的情况；下部空区的存在严重影响边坡的稳定性。该规律对露天开采转地下开采很有借鉴意义。
침대궁장령로천철광함공구변파은정성문제，고필불동대소、위치공구대변파은정적영향，이용FLAC화Geo-slope연건，분별모의3충정황(포괄36충정형)하변파적은정성：①불함공구；②공구분별위우변파상부、중부、하부화파각저부，저사공구거파면적거리고정，개변공구적관도；③공구대소학정，개변공구거파면적거리。통과대비불동관도、위치공구적변파소성구、위이운도화안전계수래분석공구대변파은정성적영향규률。결과표명：상부공구적존재유리우변파정체은정，단시영향변파적국부은정；중부공구적존재대변파은정성영향비교복잡，기유대변파은정유리적정황，야유대변파은정불리적정황；하부공구적존재엄중영향변파적은정성。해규률대로천개채전지하개채흔유차감의의。
For the stability of the slope with goafs in Gongchangling open-pit iron mine,the influence of goafs with differ-ent size and position was considered. Numerical simulation was carried out by FLAC and Geo-slope software. Three conditions ( including 36 cases) of the slope stability were simulated:①without goaf;②goaf lies in the top, middle, lower part and bot-tom of the slope and the distance of all goafs from slope surface is fixed, and the width of the goaf is changed;③The size of goafs is fixed, and the distance from slope is changed. Through contrasting with plastic zone,displacement and safety factor of slope with different goafs, the influence law of the goaf on the slope stability was obtained. The results showed that the goaf in the upper slope is beneficial to the overall slope stability,but has influence on the local stability of the slope. The goaf in the middle slope has more complex influence on slope stability,both favorable or unfavorable for slope stability situation. The goaf in the lower part of the slope has serious influence on slope stability. This law has reference meaning in transferring from open-pit mining to underground mining.