摘要
本文概述了华北型煤田内岩溶陷落柱形成岩层的专属性(奥陶系硫酸盐～碳酸盐岩混合建造),以及构造、水化学和水动力条件所起的作用。用硫酸盐饱和指数SI_S=1的界线及其统计标高,作为陷落柱分布的平均下限;同时确定陷落柱在不同迳流带内分布的密度和规律,结果与实际符合。由膏溶作用形成的陷落柱具有四个特点,并依柱内物质组成、压实和胶结情况、承受水压大小,把陷落柱分成三种水文地质类型,指出导水的柱体一般形成较新或处在强迳流带中,但多数是隔水的。
This paper describes briefly the features of karstic collapse columns in North-China-type coal field ( in Ordovician sulfate-carbonate mixed formation ), together with the effects of structure, hydrochemistry and hydrodynamic condition. The boundary of sulfate saturation index SIS=1 and its statistic height have been taken as the average lower limit for the distribution of collapse columns, and the density and distribution regularity of the collapse-columns in different runoff zones are determined. The result fits well with the actual situation.
The collapse columns which are formed under gypsum-dissolving process have four features. The collapse columns are grouped into three hydrogeologic types according to their composition, compactness, cementation, and hydraulic pressure they are subjected to. Collapse Co-lumns are impermeable in general, with exceptions only when they are new-formed or in strong runoff zones.
出处
《中国岩溶》
CAS
CSCD
北大核心
1989年第4期261-267,共7页
Carsologica Sinica
