山东临朐县废弃灰岩矿地质环境问题及治理方法研究

Research on Geological Environment Problems and Treatment Methods of Abandoned Limestone Mines in Linqu County,Shandong Province

研究区属多年开采矿山,有2处遗留采场存在矿山地质环境问题,其中PSST35采场占地面积为320 000 m~2,破损山体挖损压占土地现状类型包括未利用地和林地;PSST42采场占地面积为24 839 m~2,破损山体挖损压占土地现状类型为自然保留地。PSST35采石场内共存在WY1~6较大危岩体6处,岩性为中风化中厚层灰岩,在降雨、风化作用等外力影响下,易向下塌落,存在崩塌地质灾害隐患;PSST42采石场发育2处裂缝,裂缝切割产生危岩体稳定性较好。采取对边坡坡面清理、削坡整形(残丘清除)、场地平整、渣土回填、种植土回填、植树绿化、修建种植平台挡墙及临时施工便道的方案进行综合治理,消除地质灾害隐患,以达到绿化效果,实现矿业开发于环境的可持续发展。

The research area has been a mining area for many years,and there are two remaining mining sites with geological and environmental problems.Among them,the PSST35 mining site covers an area of 320 000 m~2,and the current types of land occupied by damaged mountain excavation include unused land and forest land.The PSST42 mining area covers an area of 24 839 m~2,and the current type of land occupied by the damaged mountain excavation is a natural reservation.There are a total of 6 large dangerous rock bodies in the PSST35 quarry,including WY1-6.The lithology is medium to thick weathered limestone,which is prone to collapse under external forces such as rainfall and weathering,posing a potential geological hazard of collapse.There are 2 cracks developed in the PSST42 quarry,and the stability of the dangerous rock mass caused by the cutting of the cracks is good.Through comprehensive management of slope cleaning,slope shaping(removal of residual hills),site leveling,soil backfilling,planting soil backfilling,tree greening,construction of planting platform retaining walls,and temporary construction roads,geological hazards are eliminated to achieve greening effects and achieve sustainable development of mining development in the environment.