TY - JOUR
TI - Evolution of overburden fracture and water seepage in coal seam group mining an example in Lingxin coal mine
AU - Guo Qiang
AU - Li Jing-Feng
AU - Cao Zhi-Guo
AU - Guo Jun-Ting
JN - Thermal Science
PY - 2023
VL - 27
IS - 1
SP - 671
EP - 677
PT - Article
AB - Taking Lingxin Coal Mine as the research object, the combination of physical  experiment and numerical simulation analysis was used to study the mining  failure of overlying strata and the development of surrounding rock cracks  in goaf. The results show that when the underground coal seam mining is not  sufficient, the overburden separation is developed, the connected pore area  of the overburden failure accounts for about 20% of the total mining area.  When the underground coal seam is fully mined, the overburden failure is  severe, the overburden failure cracks are interconnected, and the connected  pore area increases significantly.