污水在裂缝性地层中对流方程的特征线解法

为了解污水在裂缝性地层中的流动规律，利用流体力学和数学的基本知识建立地下污水的渗流模型。由于方程的特殊形式，根据数学物理方程和流体力学的知识，采用特征线法对方程进行求解，推出其在相应的边界条件下的解析解。该方法运算简便，过程明了，揭示了污水在岩块系统中的渗流特征和基本规律，即径向渗流时，污水前沿到达r断面处的时间与r^2成正比，浓度按指数幂平方衰减；单向渗流是一次的正比关系。这为污水防治以及类似的煤层注水提供科学的依据。

Characteristic solution to contra-flow equation of sewages flowing in fractured rocks

Aimed at investigating the rule governing sewage found in crack stratum, this paper discusses a seepage model of underground sewage by means of hydrodynamics and rudimentary knowledge of mathematics. The special form of the equation involves adoption of characteristic line law, according to the physics quation of mathematics and hydro mechanical knowledge, to work out analytic solution under corresponding border terms. This method presents a more simple calculation and an easier operation and discloses the rules involving the sewage flowing through the rock mass, namely in case of radial direction transfusion, when the sewage front reaches the cross section place time and r^2 has the direct ratio, the density weaken according to an index power square. The paper establishes the seepage model of subsurface sewages disposal.