Case study: Mechanism and effect analysis of presplitting blasting in shallow extra-thick coal seam

• Autorzy: Sun Qiang , Shan Chegfang , Wu Zhongya , Wang Yunbo

Identyfikatory

DOI

10.24425/ams.2022.142406

• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

szhallow-buried thick coal seam; hard roof and coal seam; fully mechanised top coal caving mining; blasting presplitting; parameter optimisation

PL

pokłady węgla; wydobycie węgla; węgiel

• Wydawca: Instytut Mechaniki Górotworu PAN
• Czasopismo: Archives of Mining Sciences
• Rocznik: 2022
• Tom: Vol. 67, no. 3
• Strony: 381--399
• Opis fizyczny: Bibliogr. 25 poz., fot., rys., tab.

Twórcy

autor

Sun Qiang

• China University of Mining and Technology, China

• https://orcid.org/0000-0003-0318-766X

autor

Shan Chegfang

• Kuqa Yushuling Coal Mine Co., Ltd, Kuqa, Aksu, China

• https://orcid.org/0000-0003-1513-4290

autor

Wu Zhongya

• China University of Mining and Technology, China

• https://orcid.org/0000-0002-6600-3656

autor

Wang Yunbo

• China University of Mining and Technology, China

• https://orcid.org/0000-0001-7057-6396

Bibliografia

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Uwagi

PL

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023)