矿井涌水量预测三维数值模拟

Three-dimensional numerical simulation for predicting mine water inflow

为了准确预测矿井涌水量,保障煤矿安全生产,以鄂尔多斯巴彦淖井田为例,采用地下水三维数值模拟理论和方法,通过对研究区水文地质模型的概化,建立了巴彦淖井田矿井涌水量预测的地下水三维非稳定流数值模拟模型,并结合矿井生产进度,以工作面月回采进度为单位,模拟预测了丰水期和平水期两种情况下,各工作面不同进度期地下水位分别疏降至2煤层底时的涌水量。结果表明:在前10个进度期内,工作面最大涌水量为1 328 m3·h-1,正常涌水量为1 134m3·h-1.实践证明:该方法不但能正确刻画矿井水文地质条件,而且还能将矿井涌水量预测和矿井生产进度紧密结合起来,具有较高的精度。

In order to accurately predict the mine water inflow,ensuring the safety of coal mine production,this article took Bayannao well field in Ordos as an example,based on the numerical simulation theories and methods of groundwater movement,a three-dimensional unsteady flow numerical model of groundwater for predicting the water inflow of Bayannao mine was established by generalizing the hydrogeology model of the study area. According to the production schedule of mine,the water inflow in every working face was simulated and predicted on a monthly stoping progress basis when the groundwater level declines to the No. 2 coal seam floor,under the average level period and wet period. The results showed the maximum water inflow of working face was 1 328 m3·h- 1,the normal water inflow was1 134 m3·h- 1in the first ten tunneling progresses. The practice shows that the method has a high precision which not only correctly depicts the mine hydrogeology conditions,but also closely combines with the mine water inflow prediction and mine production schedule.