灰岩防治水的示踪试验方法研究

Tracer test applied for prevention and control of limestone groundwater

为探查潘北矿C3Ⅰ组灰岩含水层与奥灰含水层之间的水力联系,以及F1,DF1断层的导、阻水性,用KI为示踪剂,开展示踪试验.结果表明,井田内奥灰水仅与C33下存在局部水力联系,与C13,C23灰岩含水层间无水力联系.在试验范围内,奥灰水通过不同尺度的通道对C33下含水层进行补给;露头灰岩区中F1,DF1均为导水断层,为A组煤层在开采过程中对底板灰岩水防治提供了科学依据.

Panbel coal mine is located at the northern wing of Panji anticline, whose geological structure has developed and faults in different scales have cut limestone aquifers in different depths. In order to explore the hydraulic relationship between the limestone aquifer of C3 I group and that of an Ordovician system, and the transmissibility and water-resisting property of F1 and DF1 fault, KI has been chosen as the tracer by the method of tracer test, and the degree of hydraulic relationship has been studied. The results show that the limestone water of an Ordovician system has just kept a partial hydraulic relationship with the bottom of C33, but has no hydraulic relationship with the limestone aquifers of C~ and C~. In the experimental field, the lime- stone water of an Ordovician system recharges for aquifers at the bottom of C33 through different channels, more- over, both F1 and DF1 fault in outcrop limestone area are conductive water faults. Therefore, the test provides a scientific basis for the prevention and control of the limestone water at the bottom of the group-A coal during mining process.