急斜煤层对地下水时空分布及涌水影响研究

Influences on spatial-temporal distribution of groundwater and water gushing by steep-inclined coal seam

针对目前大部分数值分析软件无法对倾角大于45°的急斜煤层单元网格概化问题,提出阶梯状逐层推移网格划分法的急斜煤层地下水数值分析模型,该方法可以很好地反映急斜煤层的空间分布特征,且能较好保证急斜煤层地质体的空间连续分布状态.基于该方法对新疆某急斜煤矿开采情况下的地下水涌水过程进行了分析研究,同时考虑了研究区内断裂带的影响,并与常规网格划分模型进行比较.将该方法下的数值分析模型的计算结果与实际监测结果进行比对,结果表明:相较于常规网格划分法下的模型,阶梯状逐层推移网格划分模型与实际监测结果吻合度更高,具有很好的适用性.

To solve the problem that most of the numerical analysis software could not generalize steep-inclined coal seam with dip angle greater than 45°, a model with stepped mesh was formed into the grid division method for numerical analysis model in groundwater. The method could well reflect the spatial distribution characteristics of steep-inclined coal seam and better assure the continuously spatial distribution of geological state in steep-inclined coal seam. Based on the method in this paper, the process of groundwater gushing was analyzed under a steep-inclined coal mine in Xinjiang, and the influence of fault zone was considered in the analytical area, which was compared with the model generalized by general grid. According to the actual monitoring data, the results of numerical analysis model show that the stepped mesh proposed in this paper acquires a better similarity to the actual observational result than the general mesh and has available applicability.