摘要
为研究煤层钻屑粒度的统计分布特征,选取深凹煤矿和何兴煤矿粒径为1～3 mm的钻屑为试验煤样,对不同质量的煤样进行扫描成像,基于MATLAB软件进行数字图像处理,获得其相应煤粒的粒度,并对煤粒的粒度统计分布进行分析。结果表明:在粒径1～3 mm范围内的煤粒粒度统计分布为一种偏态分布,经对数处理后服从威布尔分布;通过对不同质量煤样期望值和方差计算对比可知,煤样的质量在15 g以上时煤样统计粒径趋于稳定,并且稳定在1.75 mm左右。因此,选取15 g以上的煤样进行钻屑瓦斯解吸指标测量,其结果更具有代表性。
In order to study the statistic distribution features of the seam drilling cutting particles,the drilling cuttings with particle diame- ters of 1 -3 mm from Shen＇ao Mine and Hexing Mine were collected as the test coal samples, a scanning and imaging was conducted on the different quality coal samples.Based on the MATLAB software ,a digital image processing was conducted,the size of the related coal parti- cles was obtained and the analysis was conducted on the size statistic distribution of the coal particles.The results showed that within the 1 3 mm particle size range,the coal particle size statistic distribution was a skewed distribution and would submit to the Weibull distribu- tion after a logarithmic processing.The comparison between the expected value of different quality coal samples and variance calculation showed that when the quantity of the coal sample was over 15 g,the statistic particle size would be stable and would stabilize around 1.75 mm.Therefore, the coal sample over 15 g selected for the gas desorption index of drilling cutting was applied to the desorption measurement and the results would be more representative.
出处
《煤炭科学技术》
CAS
北大核心
2013年第2期60-63,共4页
Coal Science and Technology
基金
"十二五"国家科技支撑计划资助项目(2012BAK04B01)
国家自然科学基金资助项目(51104087)
重庆市科委自然科学基金计划资助项目(CSTC
2010BB6118)
关键词
钻屑
瓦斯解吸
粒度分布
钻屑瓦斯解吸指标
威布尔分布
drilling cutting
gas desorption
particle distribution
gas desorption index of drilling cutting
Weibull distribution
