湖南煤炭坝矿区岩溶塌陷的形成与易发性分区
|
摘要
根据矿区地质情况、地下水长期观测资料和各类岩土工程勘察资料,对煤炭坝矿区岩溶塌陷的成因及类型进行了研究,确定了岩溶塌陷易发性的评价指标,并对岩溶塌陷易发性进行了分区预测。结果显示:煤炭坝矿区岩溶塌陷形成的内因是茅口组灰岩岩溶发育,外因是岩溶水的大量开采和疏排;岩溶塌陷影响因素主要与岩溶发育条件、地下水条件、覆盖层条件、地形地貌和人工活动相关。经预测,煤炭坝小河、贺石桥、大成桥、洋泉湖几个地下水径流带处为极易塌区;欧家大冲、沩水、瓦寺冲、秧田冲、五亩冲水渠、白水塘、谢家祠堂几个地表水体分布处为易塌区;几个煤矿区为难塌区(或中等塌陷区);福泉山与谷塘坡为基本稳定与稳定区。勘察验证,预测结果符合实际。
On the basis of geology, data of groundwater long-terme observation and different geotechnic engineering investigation, the genesis and types of karst collapse in Meitanba mining area were studied, and the succeptibity of karst collapse was predicted by zonation. The results indicated that the internal factor for formation of karst collapse in the area was karst development of Maokou Limestone, the external factors was karst water drainage at great amount. Factors influencing karst collapse are mainly related to conditions of Karst development, groundwater, overlying strata, topography and morphology as well as human activities. From prediction, groundwater run-off zones in Xiaohe, Heshiqiao, Dachengqiao,Yangquanhu are areas very prone to collapse, Oujiadachong, Weishui, Washicong ,Baishuitang, Xeijiacitang where several surface water bodies are areas prone to collapse, several coal mining areas are hard to collapse, Fuquanshan and Gutantgpo are areas basically stable and stable. Investigation verified that the prediction was in accordance with the reality.
On the basis of geology, data of groundwater long-terme observation and different geotechnic engineering investigation, the genesis and types of karst collapse in Meitanba mining area were studied, and the succeptibity of karst collapse was predicted by zonation. The results indicated that the internal factor for formation of karst collapse in the area was karst development of Maokou Limestone, the external factors was karst water drainage at great amount. Factors influencing karst collapse are mainly related to conditions of Karst development, groundwater, overlying strata, topography and morphology as well as human activities. From prediction, groundwater run-off zones in Xiaohe, Heshiqiao, Dachengqiao,Yangquanhu are areas very prone to collapse, Oujiadachong, Weishui, Washicong ,Baishuitang, Xeijiacitang where several surface water bodies are areas prone to collapse, several coal mining areas are hard to collapse, Fuquanshan and Gutantgpo are areas basically stable and stable. Investigation verified that the prediction was in accordance with the reality.
引文
[1]陈国亮.岩溶与塌陷[M].北京:地震出版社,1992.
[2]张爱恒,马传明.矿山疏干排水引起岩溶地区致塌机理分析与预测[J].中国煤炭地质,2008,20(2):32-35.
[3]魏风化.唐山市岩溶塌陷机制分析[J].2006,42(2):86-89.
[4]武雄,高明显.枣庄岩溶塌陷形成条件及主要影响因素[J].地学前缘,2007,14(6):227-233.
[5]刘善军.隐伏岩溶区岩溶塌陷易发性评价[J].中国地质灾害与防治学报,2004,15(3):87-90.
[2]张爱恒,马传明.矿山疏干排水引起岩溶地区致塌机理分析与预测[J].中国煤炭地质,2008,20(2):32-35.
[3]魏风化.唐山市岩溶塌陷机制分析[J].2006,42(2):86-89.
[4]武雄,高明显.枣庄岩溶塌陷形成条件及主要影响因素[J].地学前缘,2007,14(6):227-233.
[5]刘善军.隐伏岩溶区岩溶塌陷易发性评价[J].中国地质灾害与防治学报,2004,15(3):87-90.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心