露天煤矿排土场综合治理方案研究--以云南省文山州普阳煤矿1号排土场为例

Research on comprehensive treatment scheme for dump of open-pit coal mine--Taking No.1 dump of Puyang Coal Mine in Wenshan prefecture in Yunnan province as an example

南方露天煤矿排土场多处于沟谷之中,其稳定性受降雨影响较大,有效治理其滑坡失稳问题对保障露天煤矿安全生产非常重要。以云南省文山州普阳煤矿1号排土场为例,阐述了排土场边坡综合治理方案,分析了该排土场边坡位移监测情况,提出了不同的治理方案并进行了技术、经济比较及论证,得到了适合1号排土场边坡治理的综合方案--即全基岩内疏水隧洞方案。结果表明:边坡监测点位移变化的原因是排土物料的自然沉降,位移方向受原始地形控制,边坡稳定并不存在滑坡,1号排土场深部目前总体处于稳定状态,传感器变形的原因可能是排土物料不均匀沉降、工程机械扰动等因素造成。

Most of the dumps of open-pit coal mines in South China are located in valleys,and their stability is greatly affected by rainfall.Effective treatment of landslide instability is of great importance to ensure the safety production of open-pit coal mine.Taking No.1 dump of Puyang Coal Mine in Wenshan prefecture in Yunnan province as an example,this paper expounds the comprehensive treatment scheme for the dump slope,analyzes the displacement monitoring of the dump slope,puts forward different treatment schemes and makes technical and economic comparison and demonstration,and obtains a comprehensive scheme suitable for the treatment of the No.1 dump slope,that is,the drainage tunnel scheme in the whole bedrock.The results show that the reason for the displacement change of the monitoring points of the slope is the natural settlement of the waste materials,and the displacement direction is controlled by the original terrain,and there is no landslide at the slope;the deep part of the No.1 dump is generally in a stable state at present,and the deformation of the sensor may be caused by the uneven settlement of the waste materials and the disturbance of engineering machinery.