Integrated Study on the Covered Karstic Collapse Columns in 3-2 Belt Roadway Area of Fangezhuang Mine

摘要

The hydro geological condition is very complicated in Fangezhuang Mine, in which water gushing (water yield more than 1.0m/min) has got to 26 times from well construction to now. The water burst accidents, which induced by covered karstic collapse columns, affected the Mine design and saftey in production and restricted coal mining and district continuation. In order to find out the influence of karstic collapse columns to the 3-2 belt roadway design, the integrated study was carried out in the area of 3-2 belt roadway, by using technical means, such as geophysical prospecting, drilling, discharge fluid test and water quality monitoring and so on. Through the study above, the identifiable position of the covered karstic collapse column was located, the original belt roadway design was modified in time, which not only avoid a potential man-made mine flooding accident and large numbers of money on the engineering, but also save plenty of funds that unnecessary.