An abnormal water inflow phenomenon occurred during the geological drilling before the transportation crossheading excavation of 82203 working face in a coal mine.In order to ensure the safe excavation of the roadway,a comprehensive analysis of the water inflow situation was conducted to determine the existence of a collapse column structure ahead.The transient electromagnetic method was used for geophysical exploration to understand the basic situation of the collapsed column structure and predict a contact angle of 63°for the collapsed column.Grouting sealing was adopted for water hazard prevention and control.And sealing plan was developed,and new grouting materials were used for sealing operations,with good sealing effects.The research results have certain guiding significance for the safe excavation of other similar mines.
关键词
水害/陷落柱/物探/封堵
Key words
water hazard/collapsed column/geophysical prospecting/sealing
维普
万方数据