深埋单斜条件下碳酸岩含水层水文地质特征研究  

Hydrogeological characteristics of carbonatite aquifer under deep buried monoclinic strata condition

作　　者：余世滔 许光泉[1] 张海涛[1] 潘生强 唐永志[2] 张继兵[2] YU Shi -tao;XU Guang -quan;ZHANG Hai -tao;PAN Sheng -qiang;TANG yong -zhi;ZHANG Ji -bing(School of Earth and Environment,Anhui University of Science &Technology,Huainan,Anhui232001;Huainan Mining Industry (Group)Co.Ltd.,Huainan,Anhui232001)

机构地区：[1]安徽理工大学地球与环境学院,安徽淮南232001 [2]淮南矿业(集团)责任有限公司,安徽淮南232001

出　　处：《地下水》2018年第6期1-4,共4页Ground water

基　　金：国家自然科学基金项目:"华北煤田南缘岩溶陷落柱形成演化机制及预测研究"(41572147)

摘　　要：新生界厚松散层覆盖下隐伏式华北型煤田,从基岩露头向深部开采过程中,煤层底部石炭系和奥陶系含水层富水性存在不同的赋存规律,其岩溶水害威胁安全生产。为此,以淮南顾北煤矿南一采区为例,采用井下放水试验、测试与分析计算方法,采用水量、水位、水质、水温等指标,分析了从露头至深部开采区的二叠系A组煤层下部单斜碳酸岩水文地质条件,结果发现:(1)该区充水水源依次为C3Ⅰ、C3Ⅱ组灰岩水,而与上覆新生界底部含水层不发生水力联系;(2)碳酸岩含水层富水性随深度增加由较强变化为较弱,但在断层控制点为较强;(3)由浅至深矿化度为2.1～2.8 g/L,水质类型由Cl·SO_4-(Na+K)型转变为Cl-(Na+K)型;(4)地下水温度与深度呈正相关,地温梯度为3.44℃/百米。上述研究为南一采区及类似条件华北型水害防治提供依据。The Carboniferous and Ordovician aquifers in the bottom of the coal seam,which is of the Concealed North China type coal field covered by thick unconsolidated layers of the Cenozoic,have different occurrence regularity during the deep mining process from the bedrock outcrop,which threatens the safe production of the karst water disaster.Taking Gubei Coal Mine South First mining area in Huainan as an example,the hydrogeological conditions of the monoclinic carbonatite aquifers in the lower Permian A formation coal seam from outcrop to deep mining area are analyzed by the methods of water releasing test,test and calculation.The results showed that:(1) the sources of water-filling is the C3 I and the C3 II limestone water respectively,but there is no hydraulic connection with the overlying unconsolidated layers water of the Cenozoic;(2) the water yield property of carbonatite aquifer gradually decreases with depth increasing and is controlled by faults,(3) the total dissolved solid range from 2.1 g/L to 2.8 g/L and water quality varies change from Cl·SO4-(Na+K) to Cl-(Na+K) with depth from shallow to deep,(4) there is a positive correlation between groundwater temperature and depth,and the geothermal gradient is 3.44 ℃ per hectometer.The above study provides a basis for prevention and control of North China type water disasters in South First mining area and similar conditions.

关 键 词：深埋条件 单斜碳酸岩含水层 水文地质特征 放水试验 顾北煤矿 

分 类 号：P641.461[天文地球—地质矿产勘探]