【摘要】：以貴州省富煤區(qū)6個突出煤層為研究對象,采用液氮吸附實驗和壓汞實驗,分析了各煤層煤樣的孔隙大小分級,計算了煤樣分形維數(shù),并分析了各煤層煤樣孔隙分形特征及其與瓦斯吸附量、煤樣滲透性的關(guān)系。結(jié)果表明:6個煤層煤樣不同級別的孔隙具有良好的分形特征,能夠顯示孔隙大小及孔隙分布特征,驗證了采用分形維數(shù)可以定量分析煤樣孔隙特征;微孔分形維數(shù)與煤樣瓦斯吸附量呈正相關(guān)關(guān)系,不同煤田煤樣瓦斯吸附能力差異較大;小孔分形維數(shù)反映了煤樣孔隙結(jié)構(gòu)較簡單,煤樣間孔隙結(jié)構(gòu)復(fù)雜程度相似;中孔、大孔、顯微裂隙和微裂隙分形維數(shù)顯示煤樣孔隙分布趨勢基本一致,存在某些級別孔隙發(fā)育很差的情況,需要增透以提高抽采效果。
[Abstract]:Taking 6 outburst coal seams in coal rich area of Guizhou province as the research object, the pore size classification of coal samples in each coal seam was analyzed by liquid nitrogen adsorption experiment and mercury injection experiment, and the fractal dimension of coal sample was calculated. The fractal characteristics of pores in coal samples and their relationship with gas adsorption capacity and permeability of coal samples are analyzed. The results show that the pore size and pore distribution of 6 coal seam samples with different grades have good fractal characteristics, and it is proved that the fractal dimension can be used to quantitatively analyze the pore characteristics of coal samples. There is a positive correlation between the fractal dimension of micropore and the gas adsorption capacity of coal sample, the difference of gas adsorption capacity between coal samples is great, the fractal dimension of small pore indicates that the pore structure of coal sample is simple and the pore structure complexity of coal sample is similar. The fractal dimension of mesopore, macropore, microfissure and microfissure shows that the distribution trend of pores in coal samples is basically the same, and there are some poor development of pores in some grades, so it is necessary to increase the effect of extraction by antireflection.
【作者單位】： 貴州大學(xué)礦業(yè)學(xué)院;貴州省非金屬礦產(chǎn)資源綜合利用重點實驗室;貴州省優(yōu)勢礦產(chǎn)資源高效利用工程實驗室;復(fù)雜地質(zhì)礦山開采安全技術(shù)工程中心;
【基金】：國家自然科學(xué)基金資助項目(51574093) 貴州省高校工程技術(shù)研究中心建設(shè)項目(黔教合KY字[2013]112) 貴州大學(xué)引進(jìn)人才科研基金資助項目(貴大人基合字[2015]30號);貴州大學(xué)礦業(yè)學(xué)院研究生創(chuàng)新基金資助項目(院研20160102)
【分類號】：TD713

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 施紹裘;張懋炯;施國勇;;斷裂表面的分形維數(shù)及其測量[J];寧波大學(xué)學(xué)報(理工版);1992年02期

2 徐龍君，張代鈞，，鮮學(xué)福;煤微孔表面的分形維數(shù)及其變化規(guī)律的研究[J];燃料化學(xué)學(xué)報;1996年01期

3 陳三強(qiáng),劉永忠,程光旭,黃昌斌;用壓汞法計算凍干物料的表面分形維數(shù)[J];食品科學(xué);2004年07期

4 景貴成,劉福海,俞理;天然低滲巖芯分形維數(shù)變化原因分析[J];巖石力學(xué)與工程學(xué)報;2005年06期

5 劉明芹;張曉光;;一種計算圖像分形維數(shù)的有效方法[J];西安科技大學(xué)學(xué)報;2009年03期

6 穆在勤,龍期威;由面積-周長關(guān)系測量的分形維數(shù)與材料韌性的關(guān)系[J];材料科學(xué)進(jìn)展;1989年02期

7 蘇輝,張玉貴,閻振h

本文編號：2395163