山东省曲阜市息陬镇岩溶塌陷成因分析及防治措施研究

Origin Analysis and Prevention Measures of Karst Collapse in Xizou Town in Qufu City in Shandong Province

摘要:

自1993年以来，曲阜市息陬镇多次发生岩溶塌陷，给当地的经济发展产生了较大的影响。本文在分析研究区地质、水文地质条件的基础上，结合现场调查、地球物理勘探及水文地质钻探，对研究区的岩溶塌陷分布规律及成因进行深入分析，并提出防治措施。研究发现，岩溶塌陷多集中发生于年内丰水期，主要受到短时强降雨的影响，在时间上具有集中突发的特点。空间上则主要受控于地质构造及地下水径流的影响，主要分布于断裂带附近及地下水主径流带上。降雨引发的地下水动力条件的改变是诱发岩溶塌陷的主要因素。

Abstract:

Karst collapse has occurred many times in Xizou town in Qufu City since 1993, which has caused a great impact to local economic development. Based on full analysis of geological and hydrogeological conditions in the study area, combining with the field survey, geophysical exploration, hydrogeological drilling and other data, the distribution law and causes of karst collapse in the study area have been deeply analyzed, and prevention measures have been proposed. It is found that most of the karst collapses occurred in the flood season (August—September). They are mainly affected by shortterm heavy rainfall, with the characteristics of concentration and sudden in time. In space, it is mainly controlled by geological structures and groundwater runoff, mainly distributed near the fault zone and on main groundwater runoff zone. The change of groundwater dynamic conditions caused by rainfall is the main factor inducing karst collapse.