基于π定理的裂隙岩体弹性模量研究

发布时间：2018-06-23 19:38

本文选题：采空区 + 渗流量　；参考：《金属矿山》2017年08期

【摘要】：岩体弹性模量E_m是工程实践中关注的因素,但直接测定E_m有一定的困难。岩体中的裂隙发育情况对E_m有很大的影响,往往裂隙间距和隙宽决定了E_m的大小。岩体环境中充满地下水,岩体中的裂隙主导了地下水的流动,其渗流特性决定了自由面渗流量的大小。通过π定理建立了自由面渗流量与E_m之间的联系,推导了渗流量和E_m的函数关系式,利用有限元法计算了采空区自由面渗流量,通过改变π参数绘制了反映渗流量和E_m关系的曲线图,在已知渗流量的情况下查阅该图可以快速计算E_m。给出了一个矿山实例,计算了该矿山岩体的弹性模量,计算结果与实际数据吻合,验证了此方法的准确性。
[Abstract]:Elastic modulus of rock mass E _ S _ m is a concerned factor in engineering practice, but it is difficult to measure it directly. The development of cracks in rock mass has a great influence on Estack, and the gap spacing and gap width often determine the size of Estack m. The rock mass environment is filled with groundwater, and the fissure in the rock mass dominates the groundwater flow, and its seepage characteristics determine the size of the free surface seepage discharge. By means of 蟺 theorem, the relation between free surface seepage flow and E _ m is established, and the function relationship between seepage flow and E _ S _ m is derived, and the free surface seepage flow in goaf is calculated by using finite element method. By changing the 蟺 parameter, the graph reflecting the relationship between the seepage discharge and the Em is plotted. When the seepage flow is known, the Emax can be calculated quickly. A mine example is given and the elastic modulus of the rock mass is calculated. The results are in agreement with the actual data and the accuracy of the method is verified.
【作者单位】：武汉科技大学资源与环境工程学院;
【分类号】：TD313

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