水下开采中确定保护层厚度的水文地质模型

HYDRO-GEOLOGICAL MODEL FOR DETERMINING THICKNESS OF PROTECTIVE LAYER IN MINING COAL UNDER WATER BODIES

本文以冒落式开采走向长壁工作面的实际情况为基础,分析开采过程中的水文地质条件,将水体下开采时安全保护层的留设问题归纳为求解二维稳定流模型的定解问题。文中将淮南某矿区淮河下开采矿井一个工作采区的实测资料与模型计算结果进行对此,其误差在允许范围内,证明本模型是符合实际的。我们认为模型对于长壁开采有一定的通用性。实际中若采用本模型可以获得较满意的结果。

Based on actual conditions of longwall face along the strike with caving and on analysis of hydro-geological conditions in mining the problem of leaving a protective layer when mining coal under water body is induced into a 2D steady flow model with a definite solution.The paper made a comparison of measured data from a working section under Huai River in a mine in Huainan with the calculated data from model. The error was within the allowable range, which showed that the model was feasible. we consider this model can be generally applied to longwall mining. In fact, satisfactory results can be obtained by using this model.