采煤驱动下复杂井田含水层化学特征与水力联系辨识

通过分析复杂井田不同含水层的常规元素、微量元素、氘氧同位素与氚同位素的水化学特征来判断各含水层的水力联系,并分别建立了Piper识别图版、Durov识别图版、氘氧同位素识别图版,借此可以快速甄别矿井突水的来源.结果表明:研究区地下水主要为大气降水补给,第四系含水层与直罗组含水层存在显著联系,直罗组含水层与延安组存在有限的联系.利用各含水层不同岩性导致的水化学离子特征差异和氘氧同位素、氚同位素的示踪特性建立识别图版,可有助于快速识别补连塔矿区突水水源,并对不同含水层的突水事故提出针对性的解决措施.

Identification of chemical characteristics and hydraulic connection of each aquifer in complex mine field driven by coal mining

By analyzing the numerical characteristics of conventional elements, trace elements, deuterium, oxygenand tritium isotope of different aquifers, the groundwater chemical characteristics and hydraulic connection of each aquifer were judged. The three identification charts (piper and durov identification charts of conventional hydrochemical components and deuterium tritium isotope identification charts) were established to realize the rapid identification of aquifer water source. The results showed that the main recharge source of groundwater in the study area was atmospheric precipitation. There was a significant indigenous connection between Quaternary aquifer and Zhiluo Formation aquifer, limited indigenous connection between the Zhiluo Formation aquifer and the Yan'an Formation aquifer. The three identification charts were established to determine the water inrush source and put forward targeted solutions for water inrush from different aquifers in Bulianta mining area based on the differences in hydrochemical ion characteristics, deuterium-oxygen and tritium isotopes.