黑山露天矿浅部火烧区边坡稳定性研究
Study on Slope Stability of Shallow Buried Area in Heishan Surface Mine
-
摘要: 为了研究黑山露天矿浅部火烧区边坡稳定性的变化规律,确保开采过程有序安全进行,采用Geo-Studio分析软件计算不同深度时端帮火烧区边坡的边坡安全系数,并进行了在非自燃状态下和关键层控制状态下的稳定性分析。分析结果表明:火烧煤层对端帮边坡稳定系数的折减幅度为36%;火烧区端帮边坡稳定系数随开采深度的增加呈线性规律递减,当端帮高度达到170 m时,边坡稳定性下降至极限平衡状态;最危险滑面始终从火烧煤层切出,可以通过改变火烧煤层这一关键层的力学参数来提高边坡稳定性。Abstract: In order to study the changing law of slope stability at the shallow buried area in Heishan Surface Mine, and to ensure the safety of the mining process, we carried out the stability study for open-pit mine, and calculated slope safety factors for different depth by Geo-Studio analysis software, and respectively implemented stability analysis under non-spontaneous combustion condition and key layer control condition. The results show that the reduction extent on the stability coefficient of the end slope is up to 36% with the existence of the burned coal seam; and the stability coefficient of the slope in the fire zone decreases linearly with the increase of the mining depth. When the height of end slope reaches to 170 m, the stability of the slope is reduced to the limit equilibrium state. The most dangerous slip surface is tend to slide out from the burning coal seam, the slop stability could be improved by increasing the mechanical parameters of coal seam that is as the key layer.
-
Keywords:
- surface mine /
- fire area /
- end slope /
- key stratum /
- slope stability
-
-
[1] 刘晓宇,赵颖,刘洋,等.土质边坡极限平衡状态及临界滑动面的判定方法[J].岩石力学与工程学报,2012,31(7):1369-1378. [2] 陈国庆,黄润秋,石豫川,等.基于动态和整体强度折减法的边坡稳定性分析[J].岩石力学与工程学报,2014,33(2):243-256. [3] 曹平,张科,汪亦显,等.复杂边坡滑动面确定的联合搜索法[J].岩石力学与工程学报,2010,29(4):814. [4] 王东,曹兰柱,朴春德,等.基于假设检验原理的边坡临滑时刻的动态识别方法[J].岩石力学与工程学报,2012,31(3):577-585. [5] 夏开宗,刘秀敏,陈从新,等.考虑突变理论的顺层岩质边坡失稳研究[J].岩土力学,2015(2):477-486. [6] 梁桂兰,徐卫亚,何育智,等.突变级数法在边坡稳定综合评判中的应用[J].岩土力学,2008,29(7):1895. [7] 桂勇,邓通发,罗嗣海,等.基于蒙特卡罗边坡稳定二元体系的建立与应用[J].岩土力学,2014(7):1979. [8] 吴启红,李文渊,明承林.基于折线形滑动和SLOPE/W模拟的滑坡稳定性对比分析[J].成都大学学报(自然科学版),2011,30(2):134-138. [9] 孙兆涛,张剑,杜研岩,等.基于Geo-Studio软件的某尾矿坝边坡稳定性分析[J].露天采矿技术,2013(5):34-35. [10] 曹兰柱,张秀平,王东,等.含断层露天矿逆倾层状边坡稳定性数值模拟[J].金属矿山,2015,44(3):178.
计量
- 文章访问数: 193
- HTML全文浏览量: 0
- PDF下载量: 0