齐跃湾矿山地质环境恢复治理工程

Countermeasures research of geological environment protection and comprehensive treatment of Qiyuewan coal mine

根据现场调查,齐跃湾煤矿现状条件下主要存在不稳定边坡、危岩体、矿山弃渣、水质污染与地表生态破坏等矿山地质环境问题,且预测随着矿山开采活动的持续进行,这些地质环境问题将会进一步凸显.综合考虑该矿山所处的地质环境背景条件、矿山地质环境问题特点与灾害体特征以及危害程度等,有针对性地提出了削方与整形、挡土墙支挡与围护、覆土植被、水质处理、截排水以及工程监测等综合性防治工程方案.该方案的具体实施,不仅可有效地解决该矿山所面临的矿山地质环境问题与地质灾害安全隐患,而且还有效地保护了矿山生态环境.

The run-of-mine ore of Guizhou phosphate ores contains 26.43% of phosphorus pentoxide and 3.82% of magnesium oxide. Aiming at the characteristic of high content of magnesium oxide in phosphate rock, the single reverse flotation method was used to enrich phosphorus pentoxide and remove magnesium oxide at normal temperature. The test results show that sulfuric acid and phosphoric acid as inhibitors realize the enrichment of phosphorus pentoxide and the reduction of magnesium oxide ; under the condition of 70.2% of the mineral powder -0.074mm mesh, taking sulfuric acid as inhibitor, the phosphorus pentoxide content increases to 31.69% from 26.43% , and the magnesium oxide content decreases to 0.89% from 3.82% , the recovery is 96.95%; taking phosphoric acid as inhibitor, the phosphorus pentoxide content increases to 31.63% from 26.43% and the magnesium oxidecontent decreases to 0.98% from 3.82%, the recovery is 97.01%