Trace elements of Carboniferous–Permian coal from the Adaohai Mine, Daqingshan Coalfield, Inner Mongolia, China

A total of 48 samples of Carboniferous–Permian coal was taken from the Adaohai Mine, Daqingshan Coalfield, Inner Mongolia, China. Cu2 coal is the major coalseam of the Daqingshan Coalfield. The samples were analyzed by the ?nductively coupled plasma–mass spectrometer method.The results indicate the content of V, Cr, Cu, Zn, Ga, Se, Ag,Cd, In, Ba, Pb and U of the Cu2 coals from Adaohai Mine is higher than that of the common Chinese coals. Compared to the world hard coals, the content of V, Cu, Zn, Ga, Se, Sr, Ag,Cd, In, Ba and U is relatively high. Compared to the clark values of the crust, only elements Se, Ag, Pb and Bi are enriched in the coal. Most of the elements in coal benches are lower than in those in roofs and partings. The statistical analysis and clustering analysis showed that the modes of trace elements occurrence for the Cu2 coal correlated positively with the minerals. The values of Sr/Ba show that the coal forming environment was influenced both by sea water and fresh water.

内蒙古阿刀亥矿晚古生代煤的微量元素和稀土元素地球化学特征

利用电感耦合等离子体质谱(ICP-MS)、X射线荧光光谱(XRF)、工业分析等方法对内蒙古阿刀亥矿煤的微量元素和稀土元素地球化学特征进行了研究,并根据某些微量元素的含量及比值探讨了研究区的成煤环境。研究发现,与中国上陆壳相比阿刀亥矿煤中比较富集Cl,Sc,Ge,Se,Zr,Mo,Cd,In,Sb,Te,Hf,Hg,Pb,Bi和REE。稀土元素分布模式表明LREE明显富集,HREE相对亏损,Eu负异常明显,且轻稀土元素之间的分馏程度较高,重稀土元素之间的分馏程度较低,稀土元素可能主要赋存于黏土矿物中。δEu,Sr/Ba,V/(V+Ni),V/Ni,Ni/Co值及S的含量总体上反映出阿刀亥矿泥炭的沉积环境为内陆淡水还原环境,间或受到海水的影响。

阿刀亥煤矿水文地质条件与矿井突水研究

对阿刀亥煤矿内水文地质条件进行调查和测试,分析探讨了矿区内地质构造与矿井水文条件的关联性。根据地层和水文资料将矿区含水层划分成四组:第四系冲洪积砂砾石层潜水层;侏罗系孔裂隙承压含水层组;石炭-二叠系孔裂隙承压含水层组;寒武-奥陶系裂隙、溶洞承压含水层。各含水层组由断层的导通作用发生水力联系,断层还是导致矿井突水的重要地质因素。