摘要
煤层富水现象极为罕见,而近年来,在我国陕北侏罗纪煤田榆横北区内发现的富水煤层水害问题较为突出。为解除榆横北区岩巷上山掘进揭露2号煤层的水害隐患,以巴拉素煤矿为例,采取定向长钻和普通短钻结合的方式进行煤层富水体超前探查,并分析其钻孔疏放水效果。结果表明,区内2号煤层水体具有局部富水性强、层内连通性好、补给条件较差、以静储量为主的特点;本次钻孔疏放水效果良好,验证了“长孔外部隔离拦截、短孔内部加强疏放”这一疏放水思路的正确性。结合矿井实际,做好拦水坝、临时水仓、拦截网,并制定相关专项应急措施,可以为后期矿井巷道掘进揭煤期间的防治水工作提供保障。
The phenomenon of water-rich coal seam is very rare,but in recent years,the water disaster of water-rich coal seam found in northern Yuheng mining area of Jurassic Coalfield is more prominent.In order to eliminate the hidden danger of water disaster in No.2 coal seam exposed by rock roadway tunneling in northern Yuheng mining area,taking Balasu Coal Mine as an example,the method of combining directional long drilling and ordinary short drilling is adopted to carry out advanced exploration of water-rich coal seam,and the drainage effect of drilling is analyzed.The results show that No.2 coal seam in the area has the characteristics of strong local water yield,good intra-layer connectivity,poor recharge conditions and mainly static reserves.The drainage effect of the borehole is good,which verifies the correctness of the drainage idea of“isolation and interception outside by the long borehole and strengthening drainage inside by the short borehole”.Combined with the actual conditions of the mine,the dam,temporary water sump and interception net should be well done,and relevant special emergency measures should be formulated to provide guarantee for the water prevention and control work during the later mine roadway excavation and coal uncovering.
作者
姬强
方刚
王春林
李彦民
杨彦宁
闫永乐
夏伟
高宇航
JI Qiang;FANG Gang;WANG Chunlin;LI Yanmin;YANG Yanning;YAN Yongle;XIA Wei;GAO Yuhang(Shaanxi Yanchang Petroleum Balasu Coal Industry Co. ,Ltd. ,Yulin 719000,China;Xi’an Research Institute,China Coal Technology and Engineering Group,Xi’an 710054,China;Shaanxi Key Laboratory of Coal Mine Water Hazard Prevention and Control Technology,Xi’an 710077,China;School of Geology and Environment,Xi’an University of Science and Technology,Xi’an 710054,China)
出处
《陕西煤炭》
2021年第6期13-16,67,共5页
Shaanxi Coal
基金
中煤科工集团西安研究院科技创新基金资助项目(2020XAYJS05)
国家重点研发计划资助项目(2017YFC0804100)
国家自然科学基金资助项目(41807221)。
关键词
巴拉素煤矿
富水煤层
岩巷揭煤
疏放水效果
安全掘进
Balasu Coal Mine
water-rich coal seam
rock roadway coal uncovering
drainage effect
safe tunneling
