单一低渗透突出煤层水力冲孔工艺优化应用分析
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摘要
为了有效提高单一低渗透突出煤层的瓦斯抽采效率,以高压水射流冲击理论为指导,针对平煤股份八矿己组突出煤层特征建立数值模型,模拟分析水力冲孔应力分布规律,通过现场实测分析冲孔有效影响范围,进一步优化设计冲孔参数、指导现场施工。现场应用表明,水力冲孔是一种行之有效的方法,对单一低渗透突出煤层实施水力冲孔卸压增透、提高瓦斯抽采效果具有重要意义。
In order to effectively improve the gas drainage efficiency of low permeability and outburst coal seam,the impact theory of high pressure water jet was used as a guide,models of numerical simulation was built on the basis of Ⅵ coal seam with outburst danger in No. 8 Coal Mine of Pingdingshan Tian'an Coal Industry Co.,Ltd. The stress distribution law of hydraulic punching was simulated and analyzed,and the effective influence area of punching was analyzed through field measurement,and further optimization design of punching parameters and guidance of site construction were made. Results showed that,hydraulic punch is an effective method,and it is of great significance to carry out hydraulic punching,pressure relief and permeability improvement for single low permeability outburst coal seam.
In order to effectively improve the gas drainage efficiency of low permeability and outburst coal seam,the impact theory of high pressure water jet was used as a guide,models of numerical simulation was built on the basis of Ⅵ coal seam with outburst danger in No. 8 Coal Mine of Pingdingshan Tian'an Coal Industry Co.,Ltd. The stress distribution law of hydraulic punching was simulated and analyzed,and the effective influence area of punching was analyzed through field measurement,and further optimization design of punching parameters and guidance of site construction were made. Results showed that,hydraulic punch is an effective method,and it is of great significance to carry out hydraulic punching,pressure relief and permeability improvement for single low permeability outburst coal seam.
引文
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[2]王玉杰.突出矿井拓展区域瓦斯治理工程应用管理体系的思考[J].水力采煤与管道运输,2014(1):97-98.Wang Yujie.Thinking on application management system of gas control project in outburst area of outburst mine[J].Hydraulic Coal Mining&Pipeline Transportation,2014(1):97-98.
[3]刘保福,朱晓恩.平顶山矿区煤与瓦斯突出规律及防治对策[J].煤,2010,19(12):3-6.Liu Baofu,Zhu Xiaoen.Outburst rules and prevention measures about Pingdingshan mining coal and gas[J].Coal,2010,19(12):3-6.
[4]陈静,王继仁,贾宝山.低透气性煤层瓦斯抽采技术与应用[J].煤炭技术,2009,28(3):70-73.Chen Jing,Wang Jiren,Jia Baoshan.Technology and application on gas drainage in low-permeability coal seam[J].Coal Technology,2009,28(3):70-73.
[5]王辉.低透气性煤层瓦斯抽采技术研究与应用[J].能源技术与管理,2013,38(4):39-40.Wang Hui.Research and application of gas drainage technology in low permeability coal seam[J].Energy Technology and Management,2013,38(4):39-40.
[6]王玉杰,杨继东.低透气性松软突出煤层水力冲孔增透效果试验研究[J].华北科技学院学报,2016,13(3):12-15.Wang Yujie,Yang Jidong.Experimental research on permeability increasing effect of hydraulic flushing for low permeability soft outburst coal seam[J].Journal of North China Institute of Science and Technology,2016,13(3):12-15.
[7]范迎春,王兆丰.水力冲孔强化增透松软低透突出煤层效果分析[J].煤矿安全,2012,43(6):137-140.Fan Yingchun,Wang Zhaofeng.Effect analysis of strengthening permeability in soft and low permeability outburst coal seam by hydraulic flushing[J].Safety in Coal Mines,2012,43(6):137-140.
[8]王兆丰,范迎春,李世生.水力冲孔技术在松软低透突出煤层中的应用[J].煤炭科学技术,2012,40(2):52-55.Wang Zhaofeng,Fan Yingchun,Li Shisheng.Application of borehole hydraulic flushing technology to soft and outburst seam with low permeability[J].Coal Science and Technology,2012,40(2):52-55.
[9]郭相斌,王玉杰,杨继东.压降法测试水力割缝有效影响半径应用分析[J].煤矿现代化,2013(3):22-24.Guo Xiangbin,Wang Yujie,Yang Jidong.Application of pressuredrop testing hydraulic cutting seam effective radius[J].Coal Mine Modernization,2013(3):22-24.
[10]徐东方,王兆丰.压降法测定钻孔的抽放影响半径试验研究[J].煤矿安全,2009,40(5):1-3.Xu Dongfang,Wang Zhaofeng.Experimental investigation on pressure falling method measuring the borehole's influence radius[J].Safety in Coal Mines,2009,40(5):1-3.
[11]吴海进,林柏泉,杨威,等.初始应力对缝槽卸压效果影响的数值分析[J].采矿与安全工程学报,2009,26(2):194-197.Wu Haijin,Lin Baiquan,Yang Wei,et al.Numerical analysis of the pressure relief effect on slot at different initial stresses[J].Journal of Mining&Safety Engineering,2009,26(2):194-197.
[12]林柏泉,孟凡伟,张海滨,等.基于区域瓦斯治理的钻割抽一体化技术及应用[J].煤炭学报,2011,36(1):75-79.Lin Baiquan,Meng Fanwei,Zhang Haibin,et al.Regional gas control based on drilling slotting extracting integration technology[J].Journal of China Coal Society,2011,36(1):75-79.
[13]袁波,康勇,李晓红,等.煤层水力割缝系统性能瞬变研究[J].煤炭学报,2013,38(12):2153-2157.Yuan Bo,Kang Yong,Li Xiaohong,et al.Experimental study on transient characteristics of hydraulic cutting seams system in coal seam[J].Journal of China Coal Society,2013,38(12):2153-2157.