Research Of East Open-pit Goaf Of PingShuo Collapse Blasting Technology

Gob of small coal pit formed in opencast mining bring significant security risks to normal mining operations,In this paper,the research on the collapse blasting technology in the open pit mining area is carried out,Have practical value.Detecting of goaf drilling exploration-oriented,three-dimensional,later scanning of transient electromagnetic geophysical prospecting as a supplement,reference to get the science judgment of underground goaf's location,extent,volume.Based on the minimum safety roof thickness and self packing theory,take different measures for different sizes,types gob.For the subsequent production operations a huge security risks and other issues for low collapse of mined-out area after blasting.To improve the blasting effect blasting parameters of theoretical analysis,By adjusting the aperture network parameters,charging structure,connections and,detonating manner,blasting design of different programs.The blasting scheme designed field trials,Good for the final blasting scheme of Pingshuo East Opencast Mining Subsidence blast.Make on mined layer is sufficiently collapse,improve the collapse blasting effect,Provide the security of subsequent normal coal mining.