| 地下采矿引起的地表下沉的动态过程模型 |
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| 引用本文： | 刘玉成,庄艳华.地下采矿引起的地表下沉的动态过程模型[J].岩土力学,2009,30(11):3406-3410. |
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| 作者姓名： | 刘玉成 庄艳华 |
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| 作者单位： | 1. 重庆大学 西南资源开发与环境灾害控制工程教育部重点实验室，重庆 400044； 2. 毕节学院 采矿工程系，贵州 毕节 551700； 3. 武汉大学 资源与环境科学学院，武汉 430079 |
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| 摘 要： | 分析了由地下采矿引起地表下沉的动态过程的Knothe时间函数模型的不足，在原Knothe时间函数中增加了一个以常数k为参数的幂指数，增加参数后的时间函数模型经理论分析符合地表点下沉的动态过程、速度变化过程和加速度变化过程；改进后的时间函数模型中参数c决定地表点下沉过程时间的长短，参数k决定地表点在时间轴上的下沉路径及达到最大速度所需的时间；用改进后的时间函数模型对某矿沉陷盆地倾向主断面上下沉量最大点的下沉过程的观测资料进行了拟合，即用经验方法确定参数c后，再用最小二乘法确定参数k。研究结果表明，该模型可较准确地拟合实测曲线。用改进后的时间函数模型结合沉陷盆地主断面的剖面函数模型，建立了主断面地表下沉曲线变化的动态过程模型，该模型可求出沉陷主断面或沉陷盆地某一点在某一时刻的下沉量、下沉速度和加速度。
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| 关 键 词： | 地表下沉 剖面曲线 动态过程 时间函数模型 |
| 收稿时间： | 2009-01-06 |
Model for dynamic process of ground surface subsidence due to underground mining |
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| LIU Yu-cheng,ZHUANG Yan-hua.Model for dynamic process of ground surface subsidence due to underground mining[J].Rock and Soil Mechanics,2009,30(11):3406-3410. |
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| Authors: | LIU Yu-cheng ZHUANG Yan-hua |
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| Institution: | 1. China Education Ministry’s Key Laboratory for Exploitation of Southwest Resources and Environmental Disaster Control Engineering, Chongqing University, Chongqing 400044, China; 2. Department of Mining Engineering，Bijie University, Bijie 551700, China; 3. School of Resources and Environmental Science, Wuhan University, Wuhan 430079, China |
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| Abstract: | Through analyzing the Knothe time function model for the dynamic process of the ground surface subsidence due to underground mining, it is found that the model can’t accord with the observational data. By adding a constant parameter k to the Knothe time function, a new time function model has been set up. The velocity and acceleration worked out from this new time function model is in accordance with the dynamic process of the surface subsidence. In this new model the parameter c decides how long the subsidence would continue; and the parameter k decides the path of the subsidence on the axis of time. This new subsidence dynamic model fits well the curve of the observation data on the inclining section of the surface subsidence basin of a certain coal mine, the parameter c is obtained by practical consideration and the parameter k is obtained by least square method. Combining this new time function model with the section function of the surface subsidence basin or the basin model, a dynamic process model for the surface subsidence due to underground mining is set up; form this model the subsidence and velocity and acceleration of some point on the subsidence basin or the section could be worked out in anytime. |
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| Keywords: | ground surface subsidence section curve dynamic process time function model |
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