贵州开阳磷矿区崩塌及其防治

开阳磷矿区被称为地质灾害的博物馆,区内地质灾害灾种齐全,滑坡、崩塌、泥石流、地面塌陷、地裂缝等地质灾害广泛分布,山体崩塌是区内分布最广的地质灾害之一。文章通过对开阳磷矿区山体崩塌地质灾害的地质背景、采矿活动的调查和分析,得出开阳磷矿区山体崩塌地质灾害形成的基本条件是区内的特殊地形地貌及断裂构造,地下磷矿开采是主要诱因;统计了各矿段崩塌体的分布特征及其危害对象;选取区内典型崩塌体,利用极射赤平投影法定性分析崩塌体的稳定性,分析得出崩塌体是不稳定的;提出了采用井下充填采矿,遏制区内崩塌的进一步发展,并结合生态移民工程、锚固与防护工程、切割爆破清除危岩体等综合治理方法。

Rock falls and their prevention in phosphorus mining area of Kaiyang County,Guizhou province

Phosphate Mine Area in Kaiyan county of Guizhou province is called the museum of the geological disasters.A lot of geological disasters happened there,such as landslide,rock fall,debris flow,ground subsidence and ground fissure.Landslide is one of the most widely distributed geologic hazards.In this paper,through the investigation and analysis on geological background and mining activities in Kaiyang Phosphate Mine Area,the basic conditions of landslides geological disaster formation are concluded,they are the special landform and fracture.Underground mining is the main cause.And get the statistics of the collapse body distribution features and its harm object.In this paper,by qualitative analysis of the typical collapse body,using shoot stereographic projection method,the conclusion that the collapse body is unstable is got.Come up with the integrated management method,they are using underground filling mining to contain the further development of the collapse,and combining with ecological immigrant project,anchorage and protection engineering、cutting or blasting to clear rock.