Study on Characteristics of Overburden Strata Structure above Abandoned Gob of Shallow Seams—A Case Study

To understand the change in overburden structure after coal seam group mining, we investigated characteristics and bearing capacity of abandoned mines a group. We provide theoretical basis for construction utilization mining subsidence area under complex geological environment. This paper takes project Zhongtie Huizhi Square Zhangqiu District, Jinan City, Shandong Province as engineering background. According to occurrence conditions study area, analysis, similar simulation, numerical practice verification are used. The shallow-buried were studied. results show that development height water-carrying fractured zone 3#, 4#, 9# seams is 17 m, 19.5 27.1 respectively, which shows water flow proportional buried depth mining. After model set aside three months, degree residual fracture goaf analyzed, distribution law porosity longwall old multiple obtained. rate fissures on both sides between 20.31% 42.31%. middle relatively small, being 8.21% 18.53%. comprehensively analyzed overlying strata mine actual stratum conditions, compared empirical calculation results, research, simulation specification with prove reliability research.