求翻译：　　新华网山东潍坊7月11日电(记者刘宝森、席敏)经山东潍坊坊子区正东矿业公司透水事故抢险指挥部进一步核查，事故发生时井下作业人员为31人，7人成功升井，24人被困，比此前公布的数据增加3人。是什么意思？

　　Xinhuanet, Shandong, Weifang July 11 (reporters Liu Baosen and and Xi Min)-Shandong Weifang Fangzi District zhengdong mine flooding accident emergency command post further verification of the company, underground work personnel of 31 people when the accident occurred, 7 were successful rise well, 24 people were trapped, than previously published data to increase 3.