基于EGF增渗材料的煤层酸化增透技术研究  

Research on coal seam acidizing and permeability increasing technology based on EGF permeable material

作　　者：宋建民 邹永洺 SONG Jianmin;ZOU Yongming(Shanxi Xiaohuigou Coal Mine Co.,Ltd.,Qingxu 030400,China;China Coal Technology and Engineering Group Shenyang Research Institute,Fushun 113122,China;State Key Laboratory of Coal Safety Technology,Fushun 113122,China)

机构地区：[1]山西小回沟煤业有限公司,山西清徐030400 [2]中煤科工集团沈阳研究院有限公司,辽宁抚顺113122 [3]煤矿安全技术国家重点实验室,辽宁抚顺113122

出　　处：《煤矿安全》2023年第5期161-168,共8页Safety in Coal Mines

基　　金：辽宁省自然科学基金资助项目(2021-MS-383)。

摘　　要：针对小回沟矿2号煤层高瓦斯低透气性的特征,在小回沟矿2204工作面进行了煤层酸化增透技术研究,试验得到2号煤层的微观孔隙结构较为复杂,微孔及小孔的迂曲程度高,利于瓦斯的储存,且矿物成分主要为SiO_(2)、Al_(2)O_(3)、TFe、CaO、MgO;根据已经掌握的煤层酸化增透机理,通过不同配比试验得到适合于2号煤层的EGF酸化增渗材料为氟化氢铵(5%)、KCl(2%)、柠檬酸(8%)、氨基磺酸(7%)、催化剂(1.5%、C7H13NO4S(0.8%)、EDTA(0.5%)、KMS-6(l%))。通过现场酸化增透试验得出:试验钻孔单孔最大瓦斯抽采体积分数为68.2%,单孔瓦斯抽采体积分数提高了1.22~25倍;酸化后单孔瓦斯混合流量提高了7.17~11.75倍;试验区域内瓦斯含量呈下降了18.68%~25.91%,相较于其它增透方式具有施工简单、普遍性强、作用效果显著等优点,解决了小回沟矿高瓦斯低透气性煤层瓦斯抽放困难的问题。According to the characteristics of high gas and low permeability of No.2 coal seam in Xiaohuigou Mine,in the 2204 working face of Xiaohuigou Mine,the acidizing and permeability increasing technology of coal seam is studied.The test results show that the microscopic pore structure of No.2 coal seam is relatively complex,and the tortuous degree of micropores and small holes is high,which is beneficial to gas storage,and the mineral composition is mainly SiO_(2),Al_(2)O_(3),TFe,CaO and MgO.According to the mechanism of acidizing and permeability increasing of coal seam that has been mastered,the EGF acidizing and permeable materials suitable for No.2 coal seam are ammonium hydrogen fluoride(5%),KCl(2%),citric acid(8%),sulfamic acid(7%),catalyst(1.5%),C7H13NO4S(0.8%),EDTA(0.5%),and KMS-6(l%).The results show that the maximum volume fraction of gas extraction in single hole is 68.2%,and the volume fraction of gas extraction in single hole is increased by 1.22-25 times.After acidification,the gas mixing flow in single hole was increased by 7.17-11.75 times.The gas content in the test area decreased by 18.68%-25.91%.Compared with other permeability increasing methods,it has the advantages of simple construction,strong universality and remarkable effect,and solves the problem of difficult gas drainage in Xiaohuigou coal seam with high gas and low permeability.

关 键 词：高瓦斯低透气性煤层 酸化增透 矿物成分 孔隙结构 瓦斯抽采 增渗材料 

分 类 号：TD712[矿业工程—矿井通风与安全]