摘要
山东某矿井下O_(2)-7奥灰水文长观成孔初期出水量为100 m^(3)/h,水压5.1 MPa。安全运行7年后,在该孔周圈区域突然出现大流量的分散出水现象,水量达到75 m^(3)/h。分析认为,其水害主要由底板破裂、底鼓造成的钻孔套管断裂引起,水源为奥灰。O_(2)-7孔水害治理采用安装三级套管为核心的治理方式,主要工序为:扫孔→下放三级套管→固三级套管。实际施工过程判断套管断裂位置为孔深3.6 m。治理完成后,关闭O_(2)-7孔孔口阀门,钻孔水压高达5.0 MPa,钻孔周圈区域无任何出水现象,水害治理取得成功。相关治理经验已被李唐煤矿T13奥灰水文长观孔水害治理所采用。
The initial flow rate of O_(2)-7 ordovician limestone observation hole in xinglongzhuang coal mine was 100 m^(3)/h and the water pressure was 5.1 MPa.After 7 years of safe operation,a large flow of water suddenly appeared in the surrounding area,which reached 75 m^(3)/h.Through analysis,it was concluded that the water disaster accident was mainly caused by the casing fracture caused by the bottom drum of the roadway floor.O_(2)-7 water disaster control design adopts third-level casing installation as the core treatment mode,the main process was:hole sweeping→lower third-level casing→fix third-level casing.According to the actual construction process,the position of the casing fracture could be judged to be 3.6 m deep.After treatment,close the valve of O_(2)-7,the water pressure was 5.0MPa,and There was no water coming out around the hole.Water disaster treatment was successful.Its experience had been applied to the water disaster control of T13 ordovician limestone water level observation hole in litang coal mine.
作者
刘海全
王磊
胡东祥
钱自卫
LIU Hai-quan;WANG Lei;HU Dong-xiang;QIAN Zi-wei(Yankuang Energy Group Co.,Ltd.,Zoucheng 273500,China;School of Resources and Earth Sciences,China University of Mining and Technology,Xuzhou 221116,China)
出处
《煤炭科技》
2022年第4期142-145,151,共5页
Coal Science & Technology Magazine
基金
中央高校基本科研业务费专项资金项目(2020ZDPYMS11)。
关键词
奥灰
水文长观孔
套管断裂
处理技术
Ordovician limestone aquifer
hydrologic observation hole
casing fracture
treatment measures
