宁夏红柳煤矿水文地质特征及首采工作面涌水分析

红柳煤矿属宁夏东部大型国有煤矿，投产仅半年，矿井首采工作面就发生较大规模的涌水4次，最大涌水量达3000m3／h，造成了较大的经济损失。在分析矿区水文地质条件和涌水特征的基础上，对矿井水文地质条件进行了评价，总结了工作面涌水特征。研究发现，直罗组砂岩裂隙孔隙承压含水层地下水是井下突水的主要水源．顶板导水裂隙带是矿井的主要充水通道；工作面突水呈现周期性特征，并与老顶周期性垮塌步距基本一致；涌出水总量与工作面推进距离及开采面积呈正相关；随着工作面开采面积的增大，工作面稳定涌水量也随之增大；顶板的岩性及其组合特征为离层储水空间的形成提供了条件；离层水的形成是矿井涌水量较大的主要原因。研究成果对该矿乃至宁东地区煤矿安全生产和矿井防治水措施的确定具有一定的指导作用。

Hydrogeological Characteristics and First Mining District Working Face Water Inflow Analysis in Hongliu Coalmine, Ningxia

The Hongliu coalmine is a large state coalmine in the eastern Ningxia. Only in half a year since put into production, 4 large-scale water inflows have been happened in the first mining district working face, with the maximum inflow 3000m3/h, and caused rather large economic loss. Based on mine area hydrogeological condition and water inflow characteristic analysis, have assessed mine hydrogeological condition and summed up working face inflow characteristics. The study has found that the underground water from the Zhiluo Formation fissure and pore water confined aquifer is the main source of underground water bursting, while the roof water conducted zone is the main water filling channel. Working face water bursting presents periodic characters, and basically consistent with main roof periodic collapsing step pitch. Total water inflow presents positively correlated with working face advance and mined area, along with the increase of working face mined area, the steady water inflow is also increased. Roof lithology and assembled characters provide condition for stratifugic water reservoir space formation, thus the main causation of large mine inflow. The study results have certain guiding significance to determine coalmine production safety and mine water control measures in the Hongliu coalmine or even all coalmines in eastern Ningxia.