Research on Static Fracturing Roof Caving Technology for Hard Immediate Roof at the Open-off Cut of 15221 Fully Mechanized Mining Face in Hongliulin Coal Mine. AERpc [Internet]. 2026 Mar. 23 [cited 2026 Mar. 29];3(3):41-5. Available from: https://elibrary.erytis.com/index.php/AERpc/article/view/722