煤层顶板透水水量与地电场参数响应分析  

Analysis About Response of Geoelectric Field Parameters to Water Inrush Volume from Coal Seam Roof

作　　者：刘盛东[1,2] 杨胜伦[2] 曹煜[3] 刘静[2] 

机构地区：[1]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221008 [2]中国矿业大学资源与地球科学学院,江苏徐州221116 [3]安徽惠洲地下灾害研究设计院,安徽合肥230088

出　　处：《采矿与安全工程学报》2010年第3期341-345,共5页Journal of Mining & Safety Engineering

基　　金：国家重点基础研究发展计划(973)项目(2007CB209400)

摘　　要：为了研究岩层中的含水量,通过建立物理实验模型,在不同含水量的沙土中,运用并行电法技术测定地电场参数,解编计算出对应含水量的沙土介质的视电阻率和视极化率参数,发现视电阻率值与沙土的含水量呈负幂函数衰减规律,视极化率与含水量呈幂函数递增规律,据此,分别提出视电阻率和视极化率响应水量变化的分析式.通过祁东矿提高回采上限试采工作面的地电场实际监测,经顶板并行电法测试的地电场参数和工作面顶板透水量的相关分析,初步验证了视电阻率与视极化率和煤层顶板透水量同样具有类似的幂函数关系.采用地电场的电性参数预测矿井水量的方法可用于矿井水害规模的预报,对于煤矿防治水工程具有实际应用价值.In studying coal moisture, we use parallel electricity instrument to measure the geoelectric parameters and calculate the apparent resistivity and apparent polariability of sandy soil with different water content. On the basis of this, we establish a physical experimental model. The result shows that, when the water increases, the apparent resistivity decreases with a negative power function, while the apparent polariability increases with a power function. Accordingly, the empirical formulas are given out. By monitoring the geoelectric field of the working face in Qidong mine and doing correlation analysis about the geoelectric parameters and water quantity, it is verified that both apparent resistivity and apparent polariability have a similar power function relationship with the water volume from the coal seam roof. The method that uses the geoelectric parameters to predict the water quantity can be used to forecast the size of the mine water disaster.

关 键 词：视电阻率 视极化率 煤层顶板透水水量 地电场 

分 类 号：TD319[矿业工程—矿井建设]