Characteristics of the roof behaviors and mine pressure manifestations during the mining of steep coal seam

• Autorzy: Hong-Sheng T. , Shi-Hao T. , Cun Z. , Lei Z. , Xiao-Gang Z.

Identyfikatory

DOI

10.1515/amsc-2017-0060

Warianty tytułu

PL

Charakterystyki zachowań materiału skalnego i wzrosty ciśnienia w trakcie urabiania złóż węgla o dużym nachyleniu

• Języki publikacji: EN

Abstrakty

EN

A steep seam similar simulation system was developed based on the geological conditions of a steep coal seam in the Xintie Coal Mine. Basing on similar simulation, together with theoretical analysis and field measurement, an in-depth study was conducted to characterize the fracture and stability of the roof of steep working face and calculate the width of the region backfilled with gangue in the goaf. The results showed that, as mining progressed, the immediate roof of the steep face fell upon the goaf and backfilled its lower part due to gravity. As a result, the roof in the lower part had higher stability than the roof in the upper part of the working face. The deformation and fracture of main roof mainly occurred in the upper part of the working face; the fractured main roof then formed a “voussoir beam” structure in the strata’s dip direction, which was subjected to the slip- and deformation-induced instability. The stability analysis indicated that, when the dip angle increased, the rock masses had greater capacity to withstand slip-induced instability but smaller capacity to withstand deformation-induced instability. Finally, the field measurement of the forces exerted on the hydraulic supports proved the characteristics of the roof’s behaviors during the mining of a steep seam.

PL

Opracowano układ do symulacji urabiania złóż węgla o dużym nachyleniu w oparciu o warunki geologiczno-górnicze w kopalni węgla Xintie. W oparciu o wyniki podobnych symulacji, analiz teoretycznych i pomiarów terenowych określono skalę spękań skał stropowych nad stromo nachylonym wyrobiskiem oraz stabilność skała stropowych, a także obliczono szerokość obszaru w zrobach podsadzanego skałą płonną. Wyniki badań wskazały, że wraz z postępem prac wydobywczych, strop bezpośredni ponad stromym wyrobiskiem obsunął się do zrobów wskutek działania sił ciężkości, wypełniając ich dolną część. W rezultacie, strop w niższej części wyrobiska wykazywał lepszą stabilność niż skały stropowe w jego górnej części. Odkształcenia i pęknięcia stropu zasadniczego zarejestrowano głównie w górnych partiach wyrobiska, spękany strop zasadniczy utworzył tam układ belki klińcowej nachylonej w kierunku upadowej, niestabilny pod wpływem uskoku i wskutek oddziałujących deformacji. Analiza stabilności stropu wykazała, że wraz ze wzrostem kąta nachylenia, wzrasta wytrzymałość górotworu na niestabilność wskutek obsuwania się w kierunku nachylenia, z kolei maleje jego wytrzymałość na oddziaływania odkształceń. Ponadto, wykonane pomiary sił działających na podpory hydrauliczne potwierdziły wzorce zachowania się górotworu w trakcie prac wydobywczych w złożach o dużym nachyleniu.

Słowa kluczowe

EN

steep coal seam; similar simulation; mining pressure; gangue backfilling; voussoir beam

PL

wyrobiska o dużym nachyleniu; symulacje; ciśnienie; podsadzka ze skały płonnej; układ belki klińcowej

• Wydawca: Instytut Mechaniki Górotworu PAN
• Czasopismo: Archives of Mining Sciences
• Rocznik: 2017
• Tom: Vol. 62, no. 4
• Strony: 871--891
• Opis fizyczny: Bibliogr. 23 poz., rys., tab., wykr.

Twórcy

autor

Hong-Sheng T.

• State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China
• Key Laboratory of Deep Coal Resource Mining, Ministry of Education, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China

autor

Shi-Hao T.

• State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China
• Key Laboratory of Deep Coal Resource Mining, Ministry of Education, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China

autor

Cun Z.

• School of Resource and Safety Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China

autor

Lei Z.

• State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China
• Key Laboratory of Deep Coal Resource Mining, Ministry of Education, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China

autor

Xiao-Gang Z.

• State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China
• Key Laboratory of Deep Coal Resource Mining, Ministry of Education, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China

Bibliografia

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Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018)