Study on control of dynamic disaster induced by high-level ETHR fracture by ground fracturing

• Autorzy: Liang Yanbo , Cheng Yuanfang , Han Zhongying , Yan Chuanliang , Liu Zhenhai , Zhang Xiufeng , Wang Chao

Identyfikatory

DOI

10.1007/s11600-023-01041-4

• Języki publikacji: EN

Abstrakty

EN

Fracture of high-level extra thick and hard roof (ETHR) above the coal seam is the main reason for the frequent occurrence of mine dynamic disasters such as mine earthquake and rock burst. In order to address this problem, the ground fracturing technology was proposed in this paper to presplit the high-level roof. The FLAC numerical model was established to study the dynamic response of the ETHR before and after fracturing. The simulation results show that: The existence of hydraulic fracture can effectively reduce the first breaking span of ETHR, and slow down the stress and elastic deformation energy concentration of coal and rock mass on both sides of goaf. In order to ensure the economical and effective opening of prefabricated cracks, the comprehensive influence of tensile stress zone and induced stress between cracks should be fully considered in the design of crack spacing. Finally, the field test of hydraulic fracturing was carried out in 63_up06 working face in Dongtan coal mine in China. The results of microseismic monitoring showed that there were only 4 strong mine earthquake events of magnitude 2.0 that happened in the first 400 m of excavation, compared with the adjacent working face, the number of large energy mining earthquake events decreased significantly. It showed that the ground fracturing effectively controlled the high and thick strata and verified the feasibility of the ground fracturing technology. The research results can provide some guidance for the treatment of mine earthquake and rock burst in similar working face.

Słowa kluczowe

EN

vertical well; ground fracturing; hard and thick roof; mine earthquake; rock burst; roof control

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2023
• Tom: Vol. 71, no. 3
• Strony: 1273--1287
• Opis fizyczny: Bibliogr. 51 poz., rys., tab.

Twórcy

autor

Liang Yanbo

• School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China

autor

Cheng Yuanfang

• School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China

autor

Han Zhongying

• School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China

autor

Yan Chuanliang

• School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China

autor

Liu Zhenhai

• School of Petroleum Engineering, China University of Petroleum (East China), Qingdao 266580, China

autor

Zhang Xiufeng

• Yanzhou Coal Mining Co., Ltd, Zoucheng 273512, Shandong, China

autor

Wang Chao

• Yanzhou Coal Mining Co., Ltd, Zoucheng 273512, Shandong, China

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024).