摘要
奥灰水是东滩矿下组煤安全开采的主要水害威胁和重点防治对象。东滩矿下组煤底板奥灰水压高达7.20-11.46 MPa，在不考虑底板受采动破坏影响下，奥灰对17煤的突水系数为0.077-0.158 MPa/m，最小值亦接近现有规程标准上限值（0.10 MPa/m）。为了查清奥灰含水层水文地质条件进而制定合理的奥灰水防治措施，基于矿井的水文地质条件及奥灰放水试验，建立了适合本矿井的水文地质模型，并利用地下水模拟软件 Visual Modflow，计算了奥灰含水层水文地质参数。通过验证，该水文地质模型能够客观的反映奥灰天然流场，为今后预测矿井涌水量、奥灰疏降水量提供了依据。
Ordovician limestone water is the main water disaster and key control object in Dongtan mine for safe mining of lows eams. Ordovician limestone water pressure reaches to 7.20-11.46 MPa in low seams. Without con-sideration of the influence of floor mining failure, water inrush coefficient of Ordovician limestone is 0.077-0.158 MPa/m and the minimum value is close to limit value（0.10 MPa/m） of the regulations. For finding out the hydro-geological condition of Ordovician limestone aquifer and formulating control measures of Ordovician limestone water, we built the hydrogeological model based on the hydrogeological conditions of the mine and dewatering test of Ordovician limestone, and calculated the hydrogeological parameters of Ordovician limestone aquifer using the computer simulation software Visual Modflow. By model validation, the hydrogeological model can reflect the natural flow field of Ordovician limestone, providing the reliable basis for prediction of water inflow in the mine and dewatered volume of Ordovician limestone.
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
2014年第3期61-64,共4页
Coal Geology & Exploration
关键词
下组煤
奥陶系石灰岩
放水试验
地下水模型
数值模拟
low seams
Ordovician limestone
dewatering test
groundwater model
numerical simulation
