【摘要】 为研究岩浆侵入活动对临涣井田煤体的影响，本文以临涣煤矿4种不同岩浆岩侵蚀程度煤体为研究对象，从煤质、孔隙结构及甲烷吸附和解吸特性3个方面探究岩浆岩侵入对煤体的影响。结果表明：岩浆岩的接触变质作用和热演化作用导致靠近岩浆岩床的煤体挥发分减小，灰分增大，水分先减小后增大，变质程度增加；岩浆侵蚀会对煤体的瓦斯吸附、解吸能力产生显著的影响，岩浆侵入后的热演化作用与构造应力会增强煤体吸附瓦斯的能力，而岩浆岩接触变质作用会导致煤体吸附瓦斯能力减弱。研究结果为岩浆岩床侵蚀条件下的煤层安全高效开采提供技术指导与保障。更多还原

【Abstract】 In order to study the influence of the magma intrusion activity on the coal in Linhuan minefield, in this paper, four different degrees of coals by the magma corrosion in Linhuan coalmine were taken as study objects, and the influence of the magma intrusion on the coal was explored from three aspects, i.e. coal quality, pore structure, and characteristics of the methane adsorption and desorption. The results show that the contact metamorphism and thermal evolution of magmatic rocks lead to a decrease of the volatile matter, an increase of the ash, a decrease first and an increase later of the moisture, and an increase of the metamorphism in the coal close to the magmatic rock beds; that the magma erosion will have a significant effect on the gas adsorption and desorption capacity of the coal; and that the thermal evolution and tectonic stress after the magma intrusion will enhance the gas adsorption capacity of the coal, while the contact metamorphism of the magma rock will leads to the weakened gas adsorption capacity of the coal. The research results provide the technical guidance and guarantee for the safe and effective mining of coal seams under erosion conditions of magmatic rock beds.更多还原