As the scale of coal mining in China continues to expand,shallow coal resources are gradually depleting,and the mining focus has gradually shifted to deeper layers. However,there is still not enough research on the highly water conducted zones that develop in deep-buried and thick coal layers. Taking a deep-buried and thick coal layer in a certain mining area in Longdong as the research object,this paper uses similar material simulation analysis to find that the development process of fractures can be divided into three stages:the initial collapse-free stage,the collapse-fracture zones and fracture zones development stage,and the stable fracture zones stage. Through statistical analysis and grey correlation analysis of the measured water conducted zones heights in nearby mining areas,it was found that the mining thickness,working face width,and working face length are the main factors affecting the development of water conducted zones. By using similar material simulation,empirical formulas,and regression analysis,the predicted development height of water conducted zones in the study area is about 206.4～233.0 m,and the fracture ratio is about 17.2～19.4. The prediction results obtained by regression analysis are only 0.6％ different from the measured results,which significantly improves the prediction accuracy of water conducted zones height and provides important scientific basis for the prevention and control of water in coal mines.
关键词
矿井水防治/深埋巨厚煤层/导水裂隙带/相似模拟/回归分析/陇东矿区
Key words
mine water prevention and control/deep and thick coal seams/water conducted zones/similar simulation/regression analysis/Longdong mining area
维普
万方数据