中文摘要：

采用二氧化氯溶液浸泡、甲烷等温吸附、x射线衍射等方法，探讨了煤储层改造新原理，从大分子结构层次上讨论了其可能的地球化学机理。实验结果显示，煤经浸泡后其吸附常数发生了明显变化，含气饱和度、临界解吸压力等得到不同程度的提高，但提高的程度受煤级控制。经二氧化氯处理后，煤中大分子结构单元发生了程度不等的解聚作用，煤大分子结构与吸附性之间存在同步响应关系，二氧化氯残液中存在苯环等有机物，解聚程度与煤化作用程度有关。浸泡后，煤分子结构发生了改变，使得其表面性质出现变化，从而影响到煤对甲烷分子的吸附能力和煤层气解吸产出潜势。

英文摘要：

By methods of chlorine dioxide solution immersion, isothermal methane adsorption and X-ray diffraction, new principle of coal reservoir stimulation and its possible geochemical mechanism on the macro-molecular structure level were discussed. The result shows that the coal adsorption constant changes obviously and the gas saturation and critical desorption pressure are improved in different degrees after immersed, but the increase efficiency is controled by coal rank. After treated by chlorine dioxide, depolymerization appears for coal macro-molecular structure unit in different degrees, and coal macro-molecular structure and its adsorptivity responses synchronously. Other organics containing benzene ring exists in residual chlorine dioxide solution, and the depolymerization degree is related to coalification degree. Experimental results indicate that the coal molecular structure changes after immersion and leads to the surface properties variation, which influences the coal adsorption capacity on methane and the desorption potential trend of eoalbed methane.