Study on location prediction of paleo--karst sinkholes in Northern China Coalfields

in order to predit accurately the development possibilitythe target area or the locaton of paleo-.arst s nMkhnoles,the factor prediction system,including wo indexes at the frst class.geological structure and karst development and 10 indexes at the second, was esablished on the basis of man conrol actors for formationof sinkholes.According to the importance of ideves,each index was given diferent weights by using fuzzy comprehensive evaluation metod.Based on thestablishetprediction system,three typieal mine areas in Northen China ad been predited and evaluated respectivly.The development probatiliy of paleo-karst sinkholes in Mine I was prediced, and the comprehensive evaluation score was 84.9 which meant the pale -.arst sinikholes was likely to be found.Locations of pales-vkarst nknoles in Mine Ⅱ were predicted on the basis of cls paform,and the resuts showed tat there were tre most developed locaton.two relatively developed locaion. Nhatis more,one pale-kart sinihnole was discovered in the most developed location by thelate project Locations of paleo-kast siMkhnoes in Mine Ⅲwere predicted on the basis of the predicted intensive runoff zones.and the resulis showed that there were most developed faget area and one palec-kast sinkhole was discovered in he most developed area.The evauatio results indicate tat the estabished prediction system can be used to predict locations of paleb-.arst sinkhnoles and the resultsaccord with facts.