杨村煤矿二、四采区奥灰水放水试验及数值模拟分析

Test of discharging water from the Ordovician limestone and numerical simulation of the second and fourth mine sections of the Yangcun Coal Mine

为防止杨村煤矿下组煤开采时发生底板突水事故,本文利用井下现有的水文地质观测孔,对奥陶系灰岩含水层进行了现场小型放水试验,并应用GMS软件模拟了地下水流场以获得水文地质参数。结果表明,奥灰水与十三～十四灰水在天然状态下无直接的水力联系,建议对十三～十四灰水采取疏水降压方式,对奥灰水采用避让措施,发现导水通道要及时进行处理。

In order to protect the water inrush accident taking place in the Taiyuan Group during exploitation in the Yangcun Coal Mine, the existing hydrogeologcal observation holes are used to carry out spot pint-size artesian tests of the Ordovician limestone aquifer and simulate the groundwater flow field in the course of artesian tests by using the software of the GMS to obtain the hydrogeological parameters. The results of the artesian tests and numerical simulation show that the Ordovician limestone has no direct hydrodynamic connection with the water of the thirteenth and fourteenth limestone layers under natural state. It is needed to dredge the water and reduce the stress for thirteenth and fourteenth limestone layers. It is also needed to keep away from the Ordovician limestone water and deal with the headrace in times