摘要:
运用相似模拟实验对黑岱沟露天矿边坡变形失稳规律进行研究,揭示出在露天开采过程中层状岩质边坡的破坏状况。研究结果表明:随着露天采掘的进行,边坡岩体最先发生变形破坏的是位于边坡最上部台阶,主要变形方式是向边坡坡面方向的微小移动,边坡不会发生滑移现象;继续增加开采时步,边坡中部台阶受来自下方岩体的挤压影响,上部开挖过后的台阶逐步发生向上抬起状况,与实际工程基本相似,不会发生滑移;在露天开采持续进行下,位移量在数值变化上垂直方向一直大于水平方向。由此可以看出边坡台阶受开采扰动影响,台阶发生扭转变形,随着开挖结束时底部台阶逐步发生鼓出现象。
Abstract:
The deformation and instability laws of the slope in Heidaigou Open-pit Mine are studied by using the similar simulation experiment. The results show that with the development of open-pit excavation, the slope rock mass is first deformed and destroyed at the top step of the slope, and the main deformation mode is the slight movement to the side slope surface, and the slope will not slip; continue to increase the mining step, the middle step of the slope is affected by the squeeze from the rock mass below, and the step after the upper excavation gradually rises up, which is basically similar to the actual project, and no slip will occur; under the continuous open-pit mining, the displacement in the vertical direction is always larger than the horizontal direction. It can be seen that the slope step is affected by mining disturbance, and the step is torsional deformation, and the bottom step gradually bulges with the end of excavation.
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