煤的镜质体随机反射率和显微组分检测能力验证实施及应用评价

Proficiency testing and application assessment of random reflectance and maceral detection of vitrinite in coal

煤岩分析能力验证计划的开展有助于了解煤炭检测实验室在镜质体随机反射率和显微组分检测项目的技术水平以及可提高煤岩分析人员鉴别显微组分的能力。组织机构按照国标制备1批煤岩分析样品,依据相关标准进行均匀性和稳定性评价,制定作业指导书,连同样品随机分发给参加者,对参加者的检测结果采用稳健统计分析中的“算法A”确定煤的镜质体随机反射率和显微组分测定结果的指定值和能力评定标准差,采用z比分数评价实验室的检测能力。共有21家实验室参加煤的镜质体随机反射率测定,20家结果满意,满意率达95.24%;13家实验室参加显微组分测定,其中镜质组和矿物的检测结果中各有1家为不满意,满意率为92.31%,壳质组满意率为100%,惰质组有1家不满意、1家有问题,满意率为84.62%。统计分析结果表明,大部分实验室能够准确测定煤的镜质体反射率和显微组分含量,只有个别实验室的检测结果偏离指定值较大。不满意的实验室需按照给出的技术建议进行分析并整改,同时加强人员的煤岩学知识培训,提高其组分鉴别水平以获得满意结果。

In order to understand the technical level of the coal testing laboratory in the vitrinite random reflectance and maceral testing project,and improve the ability of coal petrographic analysts to identify maceral,the coal petrographic analysis capability verification plan was carried out.The organization has prepared a batch of coal petrographic analysis samples according to the national standard,evaluated the uniformity and stability according to the relevant standards,formulated the operation instructions,and randomly distributed them to the participants together with the samples.The“algorithm A”in robust statistical analysis is used to determine the specified value and standard deviation for capability evaluation of vitrinite random reflectance and maceral determination results of coal,and the z ratio is used to evaluate the detection capability of the laboratory.A total of 21 laboratories participated in the random reflectance measurement of coal vitrinite,and 20 laboratories were satisfied with the results,with a satisfaction rate of 95.24%.Thirteen laboratories participated in the determination of macerals,among which one was dissatisfied with the detection results of vitrinite group and minerals,with a satisfaction rate of 92.31%.The satisfaction rate of exinite group was 100%,while 1 is dissatisfied and 1 has issues in the inertinite group,with a satisfaction rate of 84.62%.The statistical analysis results show that most laboratories can accurately determine the vitrinite reflectance and maceral content of coal,and only a few laboratories have large deviations from the specified values.Unsatisfied laboratories need to be analyzed and rectified according to the technical suggestions provided,while strengthening personnel training in coal petrology and improving their level of component identification can help obtain satisfactory results.