重庆鱼田堡煤矿矿井涌水量变化特征研究

鱼田堡煤矿是我国南方水害最为严重的矿井之一,在对其闭坑前7年矿井不同水平涌水量台账整理的基础上,通过分析不同地段涌水量变化曲线、涌水量突变点、以及各地段涌水量的占比变化情况,结合采掘活动得出以下结论:1不同水平顶板离层储水空间具有较好的连通性,在下水平成为主要涌水途径后,上水平的涌水量同步大幅减小;2同一开采水平不同石门间,当新掘进到新石门周边,形成新的涌水通道后,原石门涌水量先明显下降,之后随着覆岩逐步稳定,顶板离层裂隙逐渐变小,涌水量也缓慢降低;3最上部一水平总仓受降雨入渗直接补给,最下部三水平开采地段西4石门涌水量占全矿涌水量66.45%,受降雨影响明显,补给来源包含地表降雨以及受地表降雨补给的各类地下水。研究不同水平不同石门涌水量特征对深入了解矿区地下水的运移规律,以及类似条件矿区布置防治水工作具有参考价值。

Study on characteristics of water inflow change in Chongqing Yutianbao coal mine

Yutianbao coal mine is one of those mines mostly influenced by water catastrophes in the south of China. Based on the water inflow ledger of different levels over seven years before mine closure,through the analysis of water inflow change curve in different sections, water inflow mutation point and water inflow proportion change in different sections, combined with mining activities, we draw the following conclusions:(1)different levels of roof separation and water storage space has better connectivity, when lower level becomes the main inflow way, upper level inflow synchronically decreases.(2)When new exploitation approaches the new Shimen and forms a new channel, original Shimen water inflow greatly decreases at first and then gradually stabilizes. Roof separation cracks gradually become smaller, water inflow decreases slowly.(3)Uppermost level one is directly supplied by rainfall infiltration, lowermost level three is significantly affected by rainfall and its recharge sources are rainfall and all types of groundwater supplied by rainfall. Mining area west Shimen four water inflow accounts for 66.45% of the entire mine water inflow. The study on characteristics of water inflow in different levels and different Shimen provides information for understanding of groundwater migration laws and water prevention and control in mining area.