摘要:
为定量评价城市岩溶塌陷灾害,在详细分析徐州市地质条件的基础上,选取了岩溶发育程度、覆盖层条件、水动力条件等8个致灾因子,运用层析分析-模糊综合评价法对研究区岩溶塌陷易发程度进行评价,得到徐州市岩溶塌陷易发程度分区图.研究结果表明:徐州市岩溶塌陷易发程度分为高易发、中易发、低易发、不易发共4个等级.高易发区主要位于市区溶剂厂-新生街一带及张集水源地邓楼水厂-梁堂水厂一带.区内岩溶水水位长期在基岩面附近波动是诱发岩溶塌陷的主要因素,因此在岩溶塌陷高易发区内应加强对岩溶地下水的开采控制,建立岩溶塌陷监测预警系统,预防岩溶塌陷的发生.
Abstract:
In order to quantitatively evaluate urban karst collapse disaster,based on detailed analysis of the geological conditions,the karst collapse susceptibility in Xuzhou City was evaluated by using eight disaster in-dicators such as the degree of karst development,covering layer lithology,hydrodynamic condition and etc. By applying the method of analytic hierarchy process-fuzzy comprehensive evaluation,the susceptibility zon-ing and mapping of karst collapse assessment in the study area was achieved.Results show that the karst col-lapse grade of Xuzhou can be presented by four categories of susceptibility including high,medium,low and no.The regions which have high karst collapse grade are mainly located in the Solvent factory-Xinsheng street and Denglou water plants-Liangtang water plants in Zhangji water source.The karst water fluctuates near the bedrock surface for a long time,which leading to the karst collapses.So in high collapse prone dis-tricts,we should strengthen the exploitation of karst groundwater control,establish karst subsidence monito-ring and early warning system and prevent the happening of the karst collapse.
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