Evolution Analysis of Microseismic Events before and after Mining through Large-Scale Weak Zone with High Confined Water

Figure 12

Distribution plan of microseismic events in May. a: shallow of 2# coal; b: floor of 2# coal--floor of Yeqing limestone; c: floor of Yeqing limestone-floor of Fuqing limestone; d: floor of Fuqing limestone-floor of Daqing limestone; e: floor of Danqing limestone-roof of Ordovician limestone; f: Ordovician limestone (0–50 m); g: Ordovician limestone (51–150 m); h: Ordovician limestone (150 m-deep part).