According to state media, water started flooding into the mine a week ago Sunday at 1:40 p. m. after the wall in an adjacent abandoned mine shaft was breached while 261 miners were underground.
官方媒体报道，一周以前的周日下午1点40分，因附近一个废弃矿井被挖透，煤矿中开始有水涌入，此时有261名矿工还在井下。
The cave-in is believed to have been brought on by flooding in the mine in the city of Hegang, which is around 300-kilometers northeast of the provincial capital Harbin, near the border with Russia.
据悉，塌陷事故由渗水引起，事故发生在东北部城市鹤岗，距省会哈尔滨约300公里，位于俄罗斯边境附近。
Technology and methods set out in the mine has guiding significance to carry out polymer flooding.
阐述的技术与方法对矿场开展聚合物驱具有指导意义。
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