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首页> 外文期刊>ScientificWorldJournal >Effects of Igneous Intrusion on Microporosity and Gas Adsorption Capacity of Coals in the Haizi Mine, China
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Effects of Igneous Intrusion on Microporosity and Gas Adsorption Capacity of Coals in the Haizi Mine, China

机译：火侵入对中国海子矿煤微孔和气体吸附能力的影响

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This paper describes the effects of igneous intrusions on pore structure and adsorption capacity of the Permian coals in the Huaibei Coalfield, China. Twelve coal samples were obtained at different distances from a ~120 m extremely thick sill. Comparisons were made between unaltered and heat-affected coals using geochemical data, pore-fracture characteristics, and adsorption properties. Thermal alteration occurs down to ~1.3 × sill thickness. Approaching the sill, the vitrinite reflectance (Ro) increased from 2.30% to 2.78%, forming devolatilization vacuoles and a fine mosaic texture. Volatile matter (VM) decreased from 17.6% to 10.0% and the moisture decreased from 3.0% to 1.6%. With decreasing distance to the sill, the micropore volumes initially increased from 0.0054 cm3/g to a maximum of 0.0146 cm3/g and then decreased to 0.0079 cm3/g. The results show that the thermal evolution of the sill obviously changed the coal geochemistry and increased the micropore volume and adsorption capacity of heat-affected coal (60–160 m from the sill) compared with the unaltered coals. The trap effect of the sill prevented the high-pressure gas from being released, forming gas pocket. Mining activities near the sill created a low pressure zone leading to the rapid accumulation of methane and gas outbursts in the Haizi Mine.
机译：本文介绍了黄火侵入对中国华北煤田二叠煤孔结构及吸附能力的影响。在〜120米极厚的窗台的不同距离下获得12种煤样品。使用地球化学数据，孔隙断裂特性和吸附性能之间的未妨碍和热影响煤之间进行比较。热变化发生在〜1.3×厚度下。接近窗台，Vitriinite反射率（RO）从2.30％增加到2.78％，形成脱挥发型空泡和细镶嵌纹理。挥发物质（VM）从17.6％降至10.0％，水分从3.0％降至1.6％。随着到窗台的距离减小，微孔体积最初从0.0054cm 3 / g增加到最大值为0.0146cm 3 / g，然后降至0.0079cm 3 / g。结果表明，与未改变的煤相比，窗台的热演化明显改变了煤地球化学并增加了热影响煤的微孔体积和吸附能力（60-160米）。窗台的陷阱效果防止了高压气体被释放，形成气体袋。窗台附近的采矿活动创造了一个低压区，导致海子矿甲烷和煤气爆发的快速积累。

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