煤田地质与勘探2016，Vol.44Issue(5)：168-172,5.DOI:10.3969/j.issn.1001-1986.2016.05.033
激光破碎煤岩作用过程理论分析与实验研究
Theoretical analysis and experimental research on breaking process of laser drilling in coal and rock
摘要
Abstract
Laser drilling is a highly efficient, clean and controble new drilling technology, has great potential in CBM development. From the process of breaking coal and rock by laser and circulating gas, the paper analyzed theoretically the action process of breaking coal and rock by laser, took the average power density and the time of laser irridiation on coal and rock surface as variables, air and nitrogen as circulating medium, conducted experiment of breaking coal and rock by laser. The experiment results were basically consitent with the theo-retical analysis, showing concretely that within limits increasing the average power density and the time of la-ser irridiation would make the drilling footage and the borehole diameter as well as the heat-affected zone in-crease, which is favorable to enhance the drilling efficiency of breaking coal and rock by laser, while circula-tion of nitrogen and air for breaking coal and rock by laser each has advantages, and alternate circulation drilling can be conducted.关键词
激光钻井/煤岩破碎/空气循环/氮气循环Key words
laser drilling/breaking coal and rock/air circulation/nitrogen circulation分类
能源科技引用本文复制引用
杨玲芝,国军,王玉丹,许新建,杨明军,黄雷..激光破碎煤岩作用过程理论分析与实验研究[J].煤田地质与勘探,2016,44(5):168-172,5.基金项目
国家自然科学基金项目(41272174)；中央高校基本科研业务费专项资金“摇篮计划”(CUG130412)；中国地质大学(武汉)大学生自主创新资助计划(1410491T03)@@@@National Natural Sciences Foundation of China(41272174)；The Fundamental Research Funds for the Central niversities （41272174）
