复杂地质条件低渗高突块段底抽巷水力冲孔技术研究与应用  

Research and Application of Hydraulic Punching Technology in Low Permeability and High Outburst Section of Bottom Pumping Roadway under Complex Geological Conditions

作　　者：王永安 WANG Yong′an(Zhengzhou Coal Industry(Group)Zhengxin Coal Industry Co.,Ltd.,Xinmi 452370,China)

机构地区：[1]郑州煤炭工业(集团)郑新煤业有限公司,河南新密452370

出　　处：《河南科技》2023年第3期65-68,共4页Henan Science and Technology

摘　　要：【目的】为了提高低渗高突块段煤层瓦斯抽采效果,保证矿井安全生产,对于不具备保护层的开采地区,采用水力冲孔能起到很好的卸压增透效果。【方法】利用压降法实测考察,确定了水力冲孔的有效影响半径并依此布孔,进行增透效果考察。【结果】现场应用结果表明:经水力冲孔后,提高了煤层的透气性,瓦斯抽采浓度提高10.1倍,抽采纯量提高4.9倍,煤层瓦斯含量下降35.6%~42.4%,释放煤体中积聚的瓦斯膨胀能,减弱和消除突出的危险性。【结论】研究结果可为同类型地质条件下水力冲孔技术提供理论和工程指导。[Purposes]In order to improve the gas drainage effect of the coal seam in the low permeability and high outburst block section and ensure the safe production of the mine,hydraulic punching can play a good role in pressure relief and permeability enhancement in the area without protective layer.[Meth⁃ods]The effective influence radius of hydraulic punching was determined by using the pressure drop method,and the hole was arranged according to the radius to investigate the antireflection effect.[Find⁃ings]The field application results show that after hydraulic punching,the permeability of the coal seam is improved,the gas drainage concentration is increased by 10.1 times,the pure amount of gas drainage is increased by 4.9 times,the gas content in the coal seam is reduced by 35.6%~42.4%,the gas expan⁃sion energy accumulated in the coal body is released,and the danger of outburst is weakened and elimi⁃nated.[Conclusions]The research results can provide theoretical and engineering guidance for hydrau⁃lic perforation technology under the same type of geological conditions.

关 键 词：水力冲孔 有效抽采影响半径 卸压增透 

分 类 号：TD712.6[矿业工程—矿井通风与安全]