0 for the movement of overlaying strata and fracture development caused by the mining of upper protective layers of coal seams with close quarters.

The application of seismic attribute technique to predict Ordovician limestone karst fractured zones;

In predicting Ordovician limestone karst fractured zones, the wavelet transform can enhance signal/noise ratio (S/N) and the resolution of seismic signals; the parameter of two-dimensional fractal has its own value; and the combination of them is an eff.

The research of faults and fractured zones is very important in coal mine security and production.

The eruption patterns of the Laoheishan and Huoshaoshan volcanoes, Wudalianchi region, are studied from the characteristics of the volcanoes and in comparison with the large scale fissure eruption pattern of the New Tolbachic volcanoes, Kamchatka, Russia.