• 责任者：Lu Xuezhong (Exploration & Development Bureau of Geology & Resources of Ningxia ; Yinchuan 750021 ; China) ; Li Chunsheng
• 刊名：Exploration Engineering
• 出版年：2009
• 卷期：36(2)
• 关键词：煤田勘探 ; coal exploration ; 堵漏 ; plugging ; 宁夏 ; Ningxia
• 页码：p.1-4
• 图表：2 illus., 6 tables, 4 refs.
• 分类号：2000
• issnNo：ISSN1672-7428
• isbnNo：CN11-5063/TD

ning: 0pt; mso-bidi-font-family: 宋体">Caomiao area of Pengyang County is one of important sites of deep coal resource exploration at mountainous area of southern Ningxia. Lost circulation is very common during drilling, which induces borehole accident and mechanical failure, even leads to abandonment of the borehole. Analysis was made on countermeasures for leakage protection and sealing in different formations, and corresponding formulas and operating details were obtained through laboratory tests.