多重水害胁迫下深部山青煤带压开采防治水技术

Deep Mountain Green Coal Mining Water with Pressure Prevention and Control Technology under Multiple Water Disasters

通过对牛儿庄矿深部山青煤开采区域开采环境分析,对井田范围内的大青含水层进行了富水性分区并排除了大青与奥灰含水层存在水力联系的可能。利用现场底板破坏监测技术及数值模拟技术确定深部山青煤开采区域底板变形的最大破坏深度为18 m。利用安全隔水层厚度和突水系数法对拟开采区域进行带压开采安全性评价,进而探索一套深部山青煤带压开采的防治水技术,并在56805工作面成功实施,实现了深部山青煤在多重水害条件下的成功开采,解放原煤180 855 t。

Through the analysis of Niu＇erzhuang Mine deep mountain green coal mining area environment, hydrogeology partition was done to big green water- bearing stratum in the coalfield, ruling out the big green with the grey aquifer hydraulic connection. With field plate failure monitoring technique and numerical simulation technology, the deep mountain green coal mining area floor deformation of the maximum damage depth was settled as 18 m. Using the safety thickness of water- resisting layer and water inrush coefficient method of quasi safety evaluation under pressure mining of mining area, a set of prevention and control of water in mining the deep mountain green coal belt press technology was set up, and was successfully carried out in 56805 working face, which realized deep mountain green coal mining under multiple water disasters, released raw coal 180 855t.