- Tytuł:
- Case study: Mechanism and effect analysis of presplitting blasting in shallow extra-thick coal seam
- Autorzy:
-
Sun, Qiang
Shan, Chegfang
Wu, Zhongya
Wang, Yunbo - Powiązania:
- https://bibliotekanauki.pl/articles/2203332.pdf
- Data publikacji:
- 2022
- Wydawca:
- Polska Akademia Nauk. Czytelnia Czasopism PAN
- Tematy:
-
pokłady węgla
wydobycie węgla
węgiel
szhallow-buried thick coal seam
hard roof and coal seam
fully mechanised top coal caving mining
blasting presplitting
parameter optimisation - Opis:
- The caving effect of the top coal caving is crucial for efficient mining. Using the Yushuling coal mine, Xinjiang province, China, as a case study, the coal and rock physical and mechanical parameters, such as the compressive, tensile, and shear strength values and hardness of the top coal and roof rock, were determined. The analysis of the effect of different factors on the blasting presplitting process was numerically simulated, and the optimal parameters of blast drilling were identified. Three presplit boreholes were implemented: in the workface, the workface’s advance area, and the two roadway roofs in the workface’s advance area. The optimal blasting drilling parameters and charge structure were designed. The field test results in the mine under study indicated that the top coal recovery rate of the 110501 fully mechanised top coal caving face was improved twice (from 40 to more than 80%), and an effective blasting presplitting was achieved. The proposed blasting presplitting method has an important guiding significance for fully mechanised top coal caving mining in Xinjiang and similar mining areas.
- Źródło:
-
Archives of Mining Sciences; 2022, 67, 3; 381--399
0860-7001 - Pojawia się w:
- Archives of Mining Sciences
- Dostawca treści:
- Biblioteka Nauki
Artykuł