排土场边坡变形稳定性及失稳位移判据研究
Study on Deformation Stability and Instability Displacement Criterion of Dump Slope
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摘要: 将支撑拱原理引入排土场边坡变形稳定性研究中,推导了排土场边坡失稳位移判据,并将研究成果应用于工程实例。通过对土拱原理和支撑拱存在条件的分析,提出了排土场边坡变形全过程中的支撑拱破坏识别方法。以变形稳定性中的最大变形判别准则为基础,通过临界滑移值与实时位移值的关系定义了变形稳定系数,通过支撑拱峰值强度点位移推导了位移失稳判据。将研究成果应用于黑岱沟露天矿南端帮回采时其沿帮排土场的稳定性管理,有效保障了人员和设备的安全。Abstract: The theory of supporting arch is introduced into the study of slope deformation stability in the dump field, and the criterion of slope instability displacement is deduced, and the results are applied to the engineering example. Based on the analysis of the principle of soil arch and the existing conditions of supporting arch, a method for identifying the failure of supporting arch in the whole deformation process of dump slope is proposed. Based on the maximum deformation criterion in the deformation stability, the deformation stability coefficient is defined by the relation between the critical slip value and the real time displacement value. The displacement instability criterion is derived by supporting the peak strength point displacement of the arch. The research results are applied to the stability management of the dumping ground in the southern end of Heidaigou Open-pit Mine, which effectively ensures the safety of the personnel and equipment.
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Keywords:
- dump slope /
- supporting arch /
- deformation stability /
- displacement criterion /
- critical slip value
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