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岩溶塌陷已成为北方危害严重的地质灾害.唐山市北部低山丘陵区近年来的岩溶塌陷呈逐年加剧趋势,给当地居民生活和生产带来威胁.本文以刘备寨村岩溶塌陷作为唐山市北部低山区岩溶塌陷特点的典型实例,在分析该村岩溶塌陷形成的地质、地形条件和岩溶塌陷空间分布的基础上,对岩溶塌陷的成因机理进行了探讨.结果表明,大强度开采岩溶地下水是本区岩溶塌陷的主要诱发因素,而在盖层厚度较薄的基岩与第四系交汇处,塌陷与降雨也有直接关系.针对本区塌陷灾害的分布规律,提出了本区岩溶塌陷的防治对策。
Karst collapse has become a serious geological disaster in northern China.The karst collapse in the northern hilly region of Tangshan is increasing year by year, which threatens the life and production of local residents.Taking the karst collapse of Liu Beizhai as the northern part of Tangshan Based on the analysis of the geologic and topographical conditions and the spatial distribution of karst collapse in the karst collapse area, the genetic mechanism of karst collapse is discussed. The results show that the karst groundwater with high intensity mining is the main factor in this area Karst collapse, and there is a direct relationship between subsidence and rainfall at the confluence of bedrock with Quaternary strata, where the thickness of caprock is thinner.According to the distribution law of collapse disasters in this area, some countermeasures for prevention and control of karst collapse in this area are put forward.