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在苏南煤田进行反射法地震勘探的主要任务,是了解煤系地层的埋藏深度和地质构造。与华北常见的煤田地震地质条件相比,本区岩性、岩相多变、地质构造复杂。尤其特殊的是,苏南普遍分布着波速很高的青龙灰岩,具有强大的屏蔽作用。这给地震勘探工作带来很大困难。本文主要介绍我们在苏南有青龙灰岩屏蔽的含煤地区进行地震反射法的试验情况。
The main task of reflection seismic exploration in the southern Jiangsu coalfield is to understand the burial depth and geological structure of the coal measures strata. Compared with the geological conditions of coalfields in North China, the lithology and lithofacies of this area are variable and the geological structure is complex. In particular, the southern Jiangsu is generally distributed with high velocity Qinglong limestone, with a strong shielding effect. This has caused great difficulties in seismic exploration. This paper mainly introduces the seismic reflectometry test in the coal-bearing area with the Qinglong limestone shield in the southern part of Jiangsu Province.