The winning district partitioning in the Suntuan coalmine is mostly taken the major fault as the boundary with clear hydrogeological characteristics.The extraction of coal No.10 in the mine area is threatened by the floor Taiyuan Formation limestone water.The Taiyuan Formation limestone aquifer has characteristics of high confining pressure,weak water yield property and inhomogeneity.In allusion to the features,the regional draining control measures have been mainly adopted in extraction of coal No.10.During the initial drainage in the winning district No.101,the Taiyuan limestone water level has been dramatically dropped,but risen soon afterwards,cumulative recovery over 50m within 100 days.Based on previous hydrogeological data sorting out,combined with water level,water quality variation,analyzed Taiyuan limestone water level rising causation.The study has considered that the Ordovician limestone water has taken part in recharge,and the channel is near the shallow part coal seam outcrop,accordingly carried out the channel plugging.During the grouting plugging,the water level variation in Ordovician limestone water observation boreholes Nos.14-G1,15-G3 has a trend of initially rising up,fluctuation during the control,then lowering down after control;water level in observation borehole No.15-G2 has a trend of initially lowering down,rising up during the control,then stabilizing after control.Those have explained the good linkage between Taiyuan limestone and Ordovician limestone water levels,and control effect is apparent,thus ensured drainage results.%孙疃煤矿采区划分多以大断层为界,水文地质分区特征明显.矿区10煤层开采受底板太灰水威胁.太灰水具有高承压、弱富水、不均一的特征.针对此特点,10煤层开采主要采取区域疏降治理措施.101采区疏降初期太灰水位出现大幅下降,但随后出现了回升现象,100d内累计回升超过50 m.在整理前期水文地质资料的基础上,结合水位、水质变化,分析了太灰水位上升原因.研究认为,奥灰水参与了补给,补给通道位于采区浅部煤层露头附近.据此进行了通道堵漏.注浆堵漏期间,太灰观测孔14-观1、15-观3的水位变化趋势为初期回升、治理期间波动、治理后下降;奥灰观测孔15-观2水位呈现初期下降、治理期间回升、治理后稳定的趋势,说明太灰与奥灰水位两者间联动性较好,治理效果明显,确保了疏降成果.
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