An Experimental Study of Industrial Site and Shaft Pillar Mining at Jinggezhuang Coal Mine

Engineering site and shaft pillars are excavated to prolong the life of collieries excavate more underground coal. The Jinggezhuang colliery (‘JGZ’) is a resource-exhausted coal mine in eastern China. It was determined that industrial pillar JGZ would be extracted 2008. This study an experimental panel examine effect excavation on surface buildings complicated geological conditions. A new design proposed based monitoring increase recovery ratio. To maintain safety engineering facilities, 0091 mined deformation monitored during experiment. characteristics parameters were obtained using back analysis method. designed measured from 0091. maintained but relaxed restriction influence constructions at site. prediction results subsidence main building analyzed. maximum 7419 mm, shafts less than 10 mm. weakly influenced by excavation. can used as basic information for maintenance future. Using design, 2.54 million tons resources mined. provides example reference