In order to realize the safe and efficient mining of the short-distance isolated island working face under the deep goaf area. the 120502 isolated island working face of Liuzhuang Mine was taken as the engineering background. The method of combining numerical simulation and field measurement were used comprehensively to systematically simulate and study the spatial evolution of the st... https://www.roneverhart.com/White-to-Blue-BJJ-Training-2-DVD-Set-with-Pedro-Sauer-Preowned/