厚层黄土基底排土场边坡稳定性研究
Analysis on slope stability of thick loess-based waste dumps
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摘要: 随着内蒙古自治区锡盟和呼盟地区软岩露天煤矿的开发和建设，形成了数十个厚层黄土基底排土场，受黄土本身的力学特性影响，该类排土场基底承载力差，对排土场稳定性极为不利，导致边坡稳定性治理问题日趋严重。针对胜利东二号露天煤矿实际条件，结合排土场基底载荷分布特征，通过改进传统的建筑基底承载力算法，提出了软基底排土场基底承载力计算方法，从基底承载力角度探讨了南排土场极限堆高；基于滑坡反分析原理，确定了基底土体的抗剪强度参数；通过分析边坡稳定性，提出了边坡的空间参数。研究表明：由于排土场侧向的三角载荷约束且排土场边坡角较小，排土场极限排高不受传统基底承载力的限制；当胜利东二号露天煤矿南排土场北帮边坡高度分别为80 m和120 m时，对应的稳定边坡角分别为15°和14°，对应的平盘宽度分别为53 m和60 m。Abstract: Since the construction and production of soft rock open-pit mines in Xilin Gol League and Hulunbuir League of Inner Mongolia, tens of thick loess-based waste dumps have been formed. Its mechanical properties determine the poor bearing capacity of the loess foundation, which is very unfavorable to the stability of the dump and leads to the increasingly serious problem of slope stability control. In view of the actual conditions of Shengli east No.2 open-pit coal mine, combined with the distribution characteristics of the dump base load, the calculation method of the soft basement base bearing capacity was proposed by improving the traditional construction base bearing capacity algorithm, and the ultimate pile height of the south dump was discussed from the angle of the base bearing capacity. Based on the principle of landslide back analysis, the shear strength parameters of basement soil are determined. By analyzing slope stability, the spatial parameters of slope are proposed. The results show that the ultimate height of the dump is not limited by the traditional foundation bearing capacity because of the triangular lateral load and the small slope angle of the dump. When the north slope height of the south dump of Shengli east No.2 open-pit coal mine is 80 m and 120 m, the corresponding stable slope angle is 15° and 14°, and the corresponding flat plate width is 53 m and 60 m, respectively.
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Keywords:
- open-pit mines /
- waste dump /
- slope stability /
- soft rock foundation /
- foundation bearing capacity
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[1] 应急管理部信息研究院.世界煤炭工业发展研（2020）[M].北京：应急管理出版社，2021：150-152. [2] 徐晓惠.露天煤矿顺倾层状软岩边坡三维稳定性及其控制研究[D].阜新：辽宁工程技术大学，2015：2-3. [3] 邬雷勇.浅析地下水位上升对粘性土地基承载力的影响[J].工程与建设，2007（3）：328-329. [4] 赵波，高福平，雒承才.海底管线地基土体塑性及剪切破坏分析[J].船海工程，2008，37（2）：95-99. ZHAO Bo, GAO Fuping, LUO Chengcai. Soil plasticity and shear failure properties of pipeline foundation[J]. Ship & Ocean Engineering, 2008, 37（2）: 95-99.
[5] 袁凡凡，闫澍旺，孙万禾.成层土地基基础极限承载力的模型试验研究[J].中国港湾建设，2003（1）：14-17. YUAN Fanfan, YAN Shuwang, SUN Wanhe. Model testing and study of ultimate bearing capacity of foundations on layered soils[J]. China Harbour Engineering, 2003（1）: 14-17.
[6] 王东，王珍，曹兰柱，等.断层位置对露天矿顺倾层状边坡稳定性的影响研究[J].中国安全科学学报，2014（12）：83-89. WANG Dong, WANG Zhen, CAO Lanzhu, et al. Influence of fault’s position on stability of dip bedded slope in surface mines[J]. China Safety Science Journal, 2014（12）: 83-89.
[7] 曹兰柱，祁利民，王东，等.露天矿含断层复合边坡稳定性[J].辽宁工程技术大学学报（自然科学版），2016（8）：804-809. CAO Lanzhu, QI Limin, WANG Dong, et al. Stability research of combination slope with fault in open-pit mine[J]. Journal of Liaoning Technical University（Natural Science）, 2016, 35（8）: 804-809.
[8] 王晓光，祁利民，李振明．扎哈淖尔露天矿南帮横采内排边坡形态的确定[J]．露天采矿技术，2017（5）：19. WANG Xiaoguang, QI Limin, LI Zhenming. Determination of south slope cross mining internal dumping slope shape in Zhahanao’er Open-pit Mine[J]. Opencast Mining Technology, 2017（5）: 19.
[9] 白羽，郜秋平.元宝山露天煤矿内排土场边坡稳定性分析及参数优化[J].露天采矿技术，2017，32（10）：4. BAI Yu, GAO Qiuping. Slope stability analysis and parameter optimization of inner dump in Yuanbaoshan Open-pit Coal Mine[J]. Opencast Mining Technology, 2017, 32（10）: 4.
[10] 曹兰柱，李亚雷，王东，等.软弱基底排土场变形破坏治理措施研究[J].中国安全生产科学技术，2015,11（8）：83-89. CAO Lanzhu, LI Yalei, WANG Dong, et al. Research on control measures for deformation and failure of dump with weak basement[J]. Journal of Safety Science and Technology, 2015, 11（8）: 83-89.
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