岩溶地区岩体裂隙网络渗流分析

岩溶区由于其特殊的岩性，造成岩体裂隙非常发育，这些发育的裂隙很容易形成连通网络，在具有化学侵蚀性水流的作用下，裂隙通道被加宽，从而导致渗漏量增加。在岩溶区岩体裂隙发育特点的基础上对岩体裂隙网络进行了划分，用Monte-Carlo三维模拟技术模拟岩体裂隙的发育程度，同时也模拟出裂隙网络连通图，该图再现了优势裂隙的发育方向。在岩体节理网络的基础上，将各种裂隙和孔隙按规模和渗透性分为四级处理, 即一级真实裂隙网络、二级随机裂隙网络、三级等效连续介质体系、四级连续介质体系，各级裂隙之间以水量平衡原理建立联系。然后采用多重裂隙网络渗流模型对岩溶区岩体裂隙的渗流进行分析。研究表明，将多重裂隙网络渗流模型应用于岩溶区坝基岩体渗流分析中，能够比较确切而直观的反映出岩溶区岩体裂隙系统渗流分布规律，对岩溶区水库的防渗和防腐蚀措施具有重要的指导意义

Seepage analysis of fracture network of rock mass in karst area

The rock mass fracture is very developed because of its special rock property in karst area,which results in the developed fracture network of rock mass,the fracture channels are very easy to form the connected network. Under the action of chemical corrosive water,the channel of fissures will be widened,which leads the leakage increase. Based on the developed characteristics of rock mass fissures in karst area,fracture network of rock mass is plotted. The development degree of rock mass fracture is simulated by using the 3-D Monte-Carlo modeling technique. At the same time,the chart of fissure connection is also simulated; and this chart can exhibit the developed direction of dominant fracture in karst area. On basis of the joint network,all kinds of fracture and pore in karst area are divided into four levels by the scale and permeability of fracture and pore; i.e. level-1 real fracture network,level-2 random fracture network,level-3 equivalent continuum and level-4 continuum; the relation of each level fracture is established by the principle of water balance. Then the seepage of rock mass fracture in karst area is analyzed in detail by adopting the seepage models of multi-level fracture networks. The investigation results show that the seepage models of multi-level fracture networks are applied to the seepage analysis of rock mass in karst area,which can reflect correctly the seepage distribution law of fracture mass in karst area; and possesses important reference meanings for solving the prevention seepage and prevention corrosion in karst area.