长汀矿区矿坑涌水量模糊水文地质比拟法预测

基于长汀矿区勘探资料,分别从含水层组特征、断裂构造带水文地质特征、地下水补给、径流、排泄特征、矿井充水类型等方面对该矿区的水文地质条件进行了分析,结果表明:1矿区侵蚀基准面以上的主要充水来源为大气降水、接触裂隙水和断层接触水;2矿区侵蚀基准面以下的主要充水来源为接触裂隙水和断层接触水;3矿区地下水补给主要来源于大气降水,浅部可直接获得补给,深部通过裂隙和断层间接获得降水补给。在上述分析的基础上,基于矿区用水量实测资料,采用模糊水文地质比拟法、传统水文地质比拟法预测的矿坑涌水量分别约为44.69,46.73m3/h。尽管模糊水文地质法的预测结果略小于传统水文地质比拟法,但由前者充分考虑了降雨量、水头降深、开采面积、给水度、渗透系数和补给水源等因素,故其预测结果相对于传统水文地质比拟法而言可靠性更强。分析结果对于精确预测该矿区矿坑涌水量,确保井下安全开采有一定的参考价值。

Prediction of Pit Water Inflow Based on Fuzzy Hydrological Geological Analogy Method in Changting Mining Area

Combing with some related geological prospecting results of Changting mining area,the hydrological geological condition of the mining area is analyzed from the aspects of water-bearing formation characteristics,hydrological geological of fault structural zone,characteristics of supply,runoff and discharge of underground water,mine water filling type.The results show that:①the main water filling sources above the erosion base level of the mining area are atmospheric precipitation,contact fissure water and fault contact water;②the main water filling sources below the erosion base level of the mining area are contact fissure water and fault contact water;③the main source of groundwater in the mining area is atmospheric precipitation,the shallow strata of the mining area can be supplied by atmospheric precipitation directly,while the deep strata can be supplied by fissures and faults indirectly.Based on the above analysis results,combing with the actual measuring results of water inflow in the mining area,the fuzzy hydrological geological analogy method and classical hydrological geological analogy method are adopted to predict the pit water inflow of the mining area,the results show that the prediction results of pit water inflow of the two methods are about 44.69,46.73 m3/h,though the predictions results of fuzzy hydrological geological analogy method is less than that of classical hydrological geological analogy method,but the factors of rainfall capacity,head drawdown,mining area,specific yield,permeability coefficient and supply water source are considered by fuzzy hydrological geological analogy method,therefore,the prediction of pit water inflow of the former is superior to the one of the later.The above analysis related to the hydrological geological condition and pit water inflow prediction can provide some reference for improving the accuracy of prediction of pit water inflow,besides that,it also contribute to ensure the safety production of the mine.