北京西山变玄武岩裂隙发育规律及含水特征

全文论述三个方面:(1)对比不同剖面熔岩层单层厚度的统计特征值,确定其频率分布均为对数正态型式;根据内部结构构造将每一熔岩层划分为四个亚层。(2)讨论了裂隙的成因类型、分布特征及其控制因素。指出:同时发育有构造裂隙和成岩裂隙,但以前者为主;不同构造盆地中的裂隙参数与熔岩层厚度具相反的线性相关关系,分别反映了构造裂隙和成岩裂隙的分布特征。(3)将所有裂隙分为四级储容—渗透空间,提出了两种类型的含水系统模型及其渗流特征。

THE DEVELOPMENT LAW AND WATER-BEARING CHARACTERISTICS OF FRACTURES OF VARIATIONAL BASALT IN XISHAN, BEIJING

The paper includes three aspects, (1) According to measured date in field, we have determined statistically characteristic valve and log-normal distribution for individual thickness of lava layer. Each layer is divided into four second-level layer from internal structure. (2) We have discussed the genetic type, distribution and control factors of fracture, thus pointed out that there are both structural and diagenetic fractures, but the former is essential. The different linear relation (direct or inverse) between parameter of fracture geometry and thickness of lava layer shows respectively difference of distribution characteristics of two type fractures. (3) All of fractures can be classified into four level voids of stored capability-permeability. Two pattens of water-bearing systems and its seepage characteristics have been advanced.