随着煤矿开采深度、强度增加，采动对煤矿开采影响越来越大，开采扰动破坏了煤体吸附/解吸平衡，使瓦斯快速解吸涌出，造成工作面瓦斯超限。常采用煤层注水等水利化措施预防煤矿灾害，但由于我国大多煤层煤体透水性差，水分难以均匀润湿煤体，煤层注水效果差，抑制瓦斯涌出效果不理想。在水中添加表面活性剂或对溶液进行磁化处理可增强注水效果。为研究磁化表面活性剂对煤层瓦斯吸附解吸性能的影响，论文选用新疆硫磺沟煤矿煤样，利用全自动表面张力仪、接触角测定仪、水质检测仪等测量磁化活性剂对煤体润湿性的影响，利用自主研发的磁化溶液侵入煤体瓦斯解吸实验台，测定磁化表面活性剂溶液对煤体瓦斯解吸的影响，采用FTIR测定磁化表面活性剂溶液作用对煤样官能团结构、强度的影响，主要结论如下：

（1）表面活性剂溶液表面张力及煤体接触角均随溶液质量分数增加而逐渐减小，直至平稳，其中质量分数0.4%的SDBS对煤体润湿性能较好，与煤体接触角为25.47°；质量分数0.4%的APG0810使水的表面张力降低60.48%，PPG400对煤体润湿效果最低。

（2）磁化处理后，表面活性剂溶液pH值增大，粘度降低，密度小范围波动变化，电导率、盐度、TDS变化度较小。

（3）磁化处理后，表面活性剂SDBS对煤体润湿效果显著提升，质量分数0.4%的SDBS经磁场强度500-600 mT处理，表面张力降低55.89%，煤体接触角降低75.91%。

（4）质量分数0.4%的SDBS对煤体解吸抑制效果最好，煤体甲烷累计解吸量减小0.8662 cm³·g^-1，甲烷解吸抑制率为32.04%，最大解吸速率降低50.19%。质量分数0.4%的SDBS经磁场强度500-600 mT处理，其对煤体解吸抑制率在表面活性剂处理基础上提高16.25%。

（5）表面活性剂溶液处理后，煤样谱图中含氧官能团的强度增加，吸收峰面积增大，煤体接触角随之降低，提升了煤体亲水性，进而煤体甲烷解吸量减少。其中，质量分数0.4% SDBS作用后，含氧官能团的吸收峰面积增加81.14%，0.4% SDBS经磁场强度600-700 mT处理作用，含氧官能团与未磁化处理相比提高49.79%。

    论文以实验研究为主，结合相关学科理论知识，得到磁化作用下表面活性剂对煤体润湿及解吸的影响规律，并分析磁化作用下表面活性剂与煤体官能团之间的关系。研究结果对改善煤体润湿性与抑制煤体瓦斯解吸具有一定的指导作用。

   As coal mining depths and intensities increase, mining disturbances disrupt the coal adsorption/desorption equilibrium, causing rapid desorption and gushing of gas, resulting in gas overloads at the working face. Hydraulic measures such as coal seam water injection are often used to prevent coal mine disasters, but due to the poor permeability of most coal seams in China, it is difficult for water to evenly wet the coal body, so the effect of coal seam water injection is poor and the effect of suppressing gas gushing is not ideal. The addition of surfactants to the water or magnetisation of the solution can enhance the water injection. In order to study the effect of magnetized surfactant on the adsorption and desorption performance of coal seam gas, the thesis selected coal samples from Xinjiang Liuhuanggou coal mine, and measured the effect of magnetized surfactant on the wettability of coal using automatic surface tension meter, contact angle tester and water quality tester, etc. The effect of magnetized surfactant solution on the desorption of coal gas was measured by using the self-developed magnetized solution intrusion into the coal gas desorption test bench, and the effect of the action of magnetized surfactant solution on the structure and strength of the functional groups of coal samples was determined by FTIR, and the main conclusions are as follows.

(1) The surface tension of surfactant solution and contact angle of coal body both decrease gradually with the increase of solution mass fraction until smooth, among which SDBS with 0.4% mass fraction has better wetting performance on coal body and contact angle with coal body is 25.47°; APG0810 with 0.4% mass fraction reduces the surface tension of water by 60.48% and PPG400 has the lowest wetting effect on coal body.

(2) After the magnetisation treatment, the pH of the surfactant solution increases, the viscosity decreases, the density fluctuates in a small range and the degree of change in conductivity, salinity and TDS is small.

(3) The wetting effect of surfactant SDBS on the coal body was significantly enhanced after magnetisation treatment. The surface tension was reduced by 55.89% and the contact angle of the coal body was reduced by 75.91% when SDBS with a mass fraction of 0.4% was treated with a magnetic field strength of 500-600 mT.

(4) SDBS with a mass fraction of 0.4% had the best effect on coal desorption inhibition, with the cumulative methane desorption from the coal body reduced by 0.8662 cm3-g-1, the methane desorption inhibition rate was 32.04% and the maximum desorption rate reduced by 50.19%. The mass fraction of 0.4% SDBS treated with a magnetic field strength of 500-600 mT increased the inhibition rate of coal desorption by 16.25% compared to the surfactant treatment.

(5) After treatment with surfactant solution, the intensity of the oxygen-containing functional groups in the spectrum of coal samples increased, the absorption peak area increased and the contact angle of the coal body decreased, which enhanced the hydrophilicity of the coal body and consequently reduced the methane desorption from the coal body. In particular, the absorption peak area of oxygen-containing functional groups increased by 81.14% after the action of 0.4% mass fraction SDBS, and the treatment of 0.4% SDBS with magnetic field strength 600-700 mT increased the oxygen-containing functional groups by 49.79% compared with the unmagnetised treatment.

    The thesis is based on experimental research, combined with theoretical knowledge of related disciplines, to obtain the effect law of surfactant on coal wetting and desorption under the effect of magnetisation, and to analyse the relationship between surfactant and coal body functional groups under the effect of magnetisation. The results of the study are useful for improving the wettability of coal bodies and inhibiting the desorption of coal gas.