Investigation and characterization of mining subsidence in Kaiyang Phosphorus Mine

In Kaiyang Phosphorus Mine, serious environmental and safety problems are caused by large scale mining activities in the past 40 years. These problems include mining subsidence, low recovery ratio, too much dead ore in pillars, and pollution of phosphorus gypsum. Mining subsidence falls into four categories: curved ground and mesa, ground cracks and collapse hole, spalling and eboulement, slope slide and creeping. Measures to treat the mining subsidence were put forward: finding out and managing abandoned stopes, optimizing mining method (cut and fill mining method), selecting proper backfilling materials (phosphogypsum mixtures), avoiding disorder mining operation, and treating highway slopes. These investigations and engineering treatment methods are believed to be able to contribute to the safety extraction of ore and sustainable development in Kaiyang Phosphorus Mine.

高速公路改扩建路堑高边坡施工安全防护技术要点研究

交通事业快速发展背景下,越来越多的高速公路工程需要进行改扩建。在施工过程中,为保证高速公路持续通车,原有路堑高边坡需要进行多重防护。因此,路堑段的高边坡开挖安全防护非常重要。论文以开阳高速改扩建工程为例,对其路堑施工安全防护技术要点进行了研究。