示踪试验在探查灰岩含水层突水通道中应用

为了查明新庄孜煤矿63301工作面1组煤层底板灰岩含水层的突水通道，分别从太原组灰岩、奥陶系灰岩含水层投放NaCl示踪剂，寒武系灰岩含水层观测孔投放KI示踪剂，在工作面突水点间隔采集样品。经测试分析其浓度随时间变化关系曲线发现：底板太原组灰岩含水层中存在多条小通道和一条大通道，奥陶系灰岩含水层中存在多条小通道，而寒武系灰岩含水层存在2条通道，在不同灰岩含水层通道中，水流速度存在较大差异性，反映了其岩溶裂隙发育非均匀性特点。此外，利用本次突水资料，计算灰岩含水层的参数。为工作面底板太原组灰岩水害治理提供依据。

Application of tracing test in detection of water inrushing channels in limestone aquifer

In order to find out the water bursting channels in limestone aquifer under coal seam floor in working face 63301 of Xinzhuangzi coal mine, NaCl was adopted as the tracer and put into Taiyuan and Ordovician limestone aquifers. In the same case, KI tracer was put into observation wells in Cambrian limestone aquifer. Water samples were collected at intervals of the water inrush point at working face.63301. According to the curve of relationship between the concentration and time, the results of test and analysis indicate that there are many small channels and a large channel in the floor limestone aquifers of Taiyuan formation. Many channels are in Ordovician limestone aquifer, while Cambrian limestone aquifer has only 2 channels. The water flowing velocity in different limestone aquifer channel varies, showing the developmental heterogeneity of its karst fissures. Besides, limestone aquifer parameters are calculated with water inrush data. The above work provides an important reference for further study on the prevention and control of water hazards from Taiyuan limestone floor.