Geological disasters and control technology in high intensity mining area of western China

Yu-Shen-Fu mining area is an important coal producing area in China,where geological disasters constantly occurs because of high intensity,large scale mining. The present paper studied the characteristics of mine geological disasters by remote sensing and field survey. The results show that there are five kinds of geological disasters in the ar- ea,including ground surface collapse,ground fissures,mine earthquake over goaf,surface water reduction,groundwater table decline and land degradation. Ground surface collapse,closely correlated with high intensity mining,can be sub- divided to four zones. Space dimension of ground fissure is around 1. 45-1. 51,and there are more ground fissures per- pendicular to the direction of working face than that of along the direction of working face. The mining causes 46 mine earthquakes over goaf,and the largest magnitude is 3. 2. The area where groundwater level decline more than 8 m is 33 km2 . It is gangue covered land that accounts for a larger disruption on land use structure. The paper also points out that the future research might focus on the mine geology disaster prevention and control technology and establish a geological environment monitoring system.