文章摘要
刘学江,金鑫,彭冬.扇形多分支定向长钻孔在山西保德煤矿煤系地层勘查中的应用[J].矿产勘查,2020,11(8):1697-1701
扇形多分支定向长钻孔在山西保德煤矿煤系地层勘查中的应用
Application of fan-shaped multi-branch technology of directional longdrilling in Baode coal mine, Shanxi Province
投稿时间:2020-04-08  
DOI:
中文关键词: 煤系地层  奥陶系灰岩  扇形多分支  定向长钻孔  底板突水  地质勘查  一孔多用  山西
英文关键词: coal measure strata, Ordovician limestone,fan-shaped multi-branch, directional long drilling, floor water inrush, geological exploralion, multi-purpose one hole, Shanxi Province
基金项目:
作者单位
刘学江 神华神东保德煤矿,山西 保德 036600 
金鑫 中煤科工集团西安研究院有限公司,陕西 西安 710077 
彭冬 中煤科工集团西安研究院有限公司,陕西 西安 710077 
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中文摘要:
      山西省保德矿面临相邻工作面双巷道同时掘进存在突水危险,急需施工钻孔勘查8号煤层底板地质情况,消除突水隐患,掩护巷道掘进。该文从保德矿煤层底板水文地质条件入手,研究了保德矿煤层底板奥陶系灰岩突水可能性,计算了8号煤层底板安全隔水厚度和突水系数。计算结果突水系数为0.035~0.037 MPa/m,小于临界值0.06 MPa/m,表明底板奥陶系灰岩无直接突水危险可能。在10号煤层施工扇形多分支定向长钻孔勘查底板隐伏构造是否存在,勘查结果表明钻孔中无出水现象,证明了8号煤层底板无隐伏构造。完成的勘查钻孔又作为煤层瓦斯抽采钻孔,达到一孔多用的效果,为煤矿巷道的安全掘进提供了技术支撑。
英文摘要:
      The Baode mine faces the danger of water inrush when double tunnels are advancing on adjacent working faces. There is an urgent need to construct boreholes to investigate the geological conditions of the No. 8 coal seam floor and eliminate hidden dangers of water inrush to cover the roadway tunneling. Based on the hydrogeological conditions of the coal floor of Baode Mine, this paper studies the possibility of water inrush from the limestone of the coal floor of Baode Mine, and calculates the thickness of the safe water cutoff and the coefficient of water inrush of the coal floor of No. 8 coal bed. The calculated water inrush coefficient is 0.035~0.037 MPa/m, which is less than the critical value of 0.06 MPa/m, indicating that the floor Ordovician limestone has no possibility of direct water inrush. The construction of fan-shaped multi-branch directional long boreholes in No. 10 coal seam was used to investigate the existence of Ordovician limestone concealed structures in the bottom plate. The investigation results showed that there was no water outflow in the borehole, proving that there are no hidden structures in No. 10 coal seam. The completed exploration boreholes are also used as coal seam gas extraction boreholes, achieving the effect of one hole multi-purpose, and providing technical support for the safe driving of coal mine roadways.
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