The mine area coal overlying sandstone water is an important constraint factor impacting coalmine efficient and safe produc -tion.In a minefield, within 110m range from the coal No.3 roof has developed 3 sandstone layers, in which, the sandstone K10 has larger thickness with complicated configuration , thus to identify its water hosting status is extremely necessary during the mining of un-derlying coal seams.Based on the theory of AVO is sensitive to fluid information , carried out study on water -bearing property of sand-stone K10 in the coalmine.Firstly pick up macro surface element gather carried out stacking , then extract AVO inversional attributes including intercept (P), gradient (G), S-wave reflectance, pseudo Poisson's ratio etc.and carried out analysis.The result has shown that since the SNR of sandstone in macro surface element is rather low and lack of large offset data , result in inversional P and G data volumes lower SNR;contrary, S-wave reflectance and pseudo Poisson's ratio have obviously reflected water -bearing anoma-lies.According to the conclusion carried out mine area overlying sandstone water -bearing property prediction .The result has dis-played that overlying sandstone K 10 has 2 water-rich areas;one is near the central part well LACxxx , another near the northwest cor-ner well C-xx in study area.%矿区煤层上覆砂岩水是制约煤矿高效、安全生产的重要因素.某井田3#煤层顶板110 m范围内主要发育3套砂岩,其中K10砂岩赋存厚度较大,形态较为复杂,查明其赋水状态对开采下伏煤层极为必要.依据AVO技术对流体信息敏感的理论,对该煤矿K10砂岩的含水性进行研究:首先抽取宏面元道集进行叠加,进而提取截距(P)、梯度(G)、横波反射率、伪泊松比等AVO反演属性进行分析.结果表明:由于宏面元内砂岩信噪比较低,同时又缺少大炮检距数据,致使反演的P值和G值数据体的信噪比也较低;相反横波反射率及伪泊松比则对含水异常反映明显.依据该结论对矿区煤层上覆砂岩含水性进行了预测,结果显示其上覆砂岩K10主要分布2个富水区域:一是研究区中部LACxxx井附近,另一个为研究区西北角C-xx井附近.
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