Study on Roof Instability Effect and Bearing Characteristics of Hydraulic Support in Longwall Top Coal Caving
نویسندگان
چکیده
In longwall top coal caving (LTCC), due to the fracture and migration of coal, roof will break collapse, which causes serious impact damage hydraulic support. Therefore, we aimed reveal relationship between instability effect bearing characteristics support in LTCC face. Based on occurrence conditions 08 mining area Shilawusu Coal Mine, model upper immediate was established, working resistance derived. Secondly, dynamic coupling roof-top coal-hydraulic established LS-DYNA, crushing degree different fields were analyzed. The results show that main factors affecting are position roof, acting force lower distribution gangue goaf. rotary at wall brings effects, resulting fractures front a large amount crushed concentrated end canopy. significantly impacts canopy, especially back canopy hinged pin shaft, is prone bending fracture. research can provide references experience for stability control strata structural optimization
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ژورنال
عنوان ژورنال: Applied sciences
سال: 2023
ISSN: ['2076-3417']
DOI: https://doi.org/10.3390/app13148102