Forecast Method for Water Inflow from Working Face in Shallowly Buried Coal Seam
Forecast Method for Water Inflow from Working Face in Shallowly Buried Coal Seam
复制标题
DOI：
--
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
Z. You-zhen
中科院分区：
文献类型：
--
作者：
Z. You-zhen
大井法是目前广泛使用的工作面涌水量预测方法之一，但在金界煤矿的实际测试中发现，该方法预测的涌水量远小于实测值。为了更准确地预测工作面涌水量，为控制工作面顶板涌水量提供依据。针对浅埋煤层上覆岩层冒落的特点，在大井法的基础上，提出了一种动静结合的涌水量方法，该方法的涌水量由冒落区一侧补给的涌水量和含水地层的涌水量组成，与实测值较为接近，说明所选取的参数适合于浅埋煤层工作面涌水量的预测。同时，为了避免单一预测法预测涌水量时产生较大的偏差，采用水文地质条件类比法进行了论证。
Big-well method is one of the methods widely used to forecast water inflow from working face now.However,it has been found that the water flow volume forecasted through this method is much smaller than the measured volume from the actual test in Jinjie coalmine.In order to forecast more accurately the inflow of working face so as to provide a basis for controlling roof water of working face,we proposed a combined method of dynamic and static inflows based on the big-well method by considering the characteristic of overlying stratum caving in shallowly buried coal seams.Its water inflow is composed of the inflow recharged from the side of caving area and the inflow from water-bearing strata.The data obtained with this combined method is close to that from the actual measurement,indicating that the parameters selected are suitable to the forecast water inflow from working face in shallowly buried coal seams.Meanwhile,in order to avoid the big deviation when the sole predictor method is used to forecast inflow,hydrogeological conditions analogy method is adopted to demonstrate this proposed method.