摘要
煤矿突水事故发生后,识别突水水源对于制定救援方案意义重大。为快速实现突水水源识别,选取了徐庄矿历史采集的20组水样数据,对其Ca^(2+)、Mg^(2+)和SO_(4)^(2-)等常规离子采用聚类分析、浓度差异性分析等方法,将水样划分为A、B、C、D 4组,并确定其分别来源于太原组L4灰岩含水层、下石盒子组底界砂岩含水层和7#煤层顶板砂岩含水层。以各含水层离子浓度范围为数据库,绘制了基于Piper图的离子库分区。为进一步验证离子库分区图的准确性,对该矿7331工作面的突水过程进行了分析。通过分析不同时间点水样在离子库分区图中的位置变化情况,确定了其突水过程存在着突水水源的动态转化,依据离子守恒计算出混合突水水源中7#煤顶板砂岩水占比26.96%,上石盒子砂岩水占比73.04%,与实际观测得突水水源中7#煤层顶板砂岩水占比20%~25%、上石盒子砂岩水占比75%~80%基本一致。
After the occurrence of water inrush accident in coal mine,it is of great significance to identify water inrush source for formulating rescue plan.In order to quickly realize water inrush source identification,20 groups of water sample data collected in Xuzhuang Mine history were selected,and their Ca^(2+),Mg^(2+),SO_(4)^(2-)and other conventional ions were divided into four groups,A,B,C,and D based on cluster analysis and concentration difference analysis.And it is determined that they are derived from L4 limestone aquifer of Taiyuan Formation,sandstone aquifer of Lower Shihezi Formation and sandstone aquifer of No.7 coal roof.Using the ion concentration range of each aquifer as the database,the ion library partition based on Piper diagram was plotted.In order to further verify the accuracy of ion library partition map,the water inrush process of working face 7331 of the mine was analyzed.By analyzing the position changes of water samples at different time points in ion bank partition diagram,it is confirmed that there is dynamic transformation of water inrush source in the process of water inrush.Based on the ion conservation,it is calculated that the water proportion of sandstone in No.7 coal roof is 26.96%and that of sandstone in Upper Shihezi is 73.04%in the mixed water inrush source.It is basically consistent with the actual observation that the water proportion of No.7 coal roof sandstone is 20%~25%and that of upper stone box sandstone is 75%~80%in water inrush source.
作者
杨飞
石志远
郑士田
王琦
徐智敏
YANG Fei;SHI Zhiyuan;ZHENG Shitian;WANG Qi;XU Zhimin(Xi'an Research Institute Co.,Ltd.,China Coal Technology and Engineering Group Corp.;Shaanxi Key Laboratory of Prevention and Control Technology for Coal Mine Water Hazard;School of Resources and Geosciences,China University of Mining and Technology)
出处
《现代矿业》
CAS
2022年第7期250-254,262,共6页
Modern Mining
基金
“十三五”国家重点研发计划项目(编号:2017YFC0804102)。
关键词
离子库分区
聚类分析
水源动态转化
离子守恒
水源判别
partition of ion bank
cluster analyses
dynamic conversion of water source
ion of conservation
water source discrimination
