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煤是一种复杂的多孔性固体,它具有分子筛和胶体的一些性质.成煤母体在整个成煤过程中都伴随着大量气体的生成,气体逸出和储存空间俗称孔隙.对于多孔性固体,除了比表面积等参数外,孔隙结构对于煤的许多物理、化学过程都起着很重要的作用.英国学者Brichall等通过试验提出一个观点:决定材料强度的关健在于材料中某种尺寸以上的大孔所占的比例.大孔所占的比例越少,最大尺寸孔的孔径越小,则强度越高.由此看来,煤中大孔的尺寸,孔径的分布以及物质的均一性对于煤的破碎性,气体的吸附、解吸、扩散和运移等均有着重大的影响.本文现介绍通过压汞仪对淮南B_(11b)和B_(10)煤层煤进行孔隙测定的结果.
Coal is a complex porous solid which has some properties of molecular sieves and colloids.Mapping coal is accompanied by a large amount of gas during the whole process of coal formation, and the gas escape and storage space are commonly called pores.For porous solids, Pore structure plays an important role in many physical and chemical processes of coal besides the specific surface area, etc. British scholar Brichall et al. Put forward the opinion through experiments that the key to determining the strength of a material lies in the large size of the material The proportion of pores. The smaller the proportion of large pores, the smaller the largest pore size pore size, the higher the intensity.Thus, the size of large pores in coal, pore size distribution and material uniformity for the coal The brittleness, gas adsorption, desorption, diffusion and migration have a significant impact.This paper presents the mercury porosimetry B_ (11b) and B_ (10) coal seam porosity measurement results.