Considering the effects of local impact disturbance on deep sandstone: exploring strength weakening mechanism

• Autorzy: Zhao Jihe , Jin Jiaxu , Li Yanfeng , Wu Pengfei , Wang Haibo , Shi Yingshuang

Identyfikatory

DOI

10.24425/ams.2025.154163

• Języki publikacji: EN

Abstrakty

EN

The stability of rock mass is an important safety issue in the process of deep mining, and the dynamic disturbance caused by excavation and blasting is an important factor affecting the stability of rock mass. To deeply understand the mechanical characteristics and damage mechanisms of deep sandstone after local impact disturbance by high prestresses, a self-developed rock disturbance system was used to carry out disturbance followed by a uniaxial compression test (UCT) on the rock samples. The whole process of UCT was monitored utilising acoustic emission (AE) technology, and the particle size and fractal dimension of debris after sandstone failure were analysed to explore its strength-weakening mechanism. The experimental study elucidated the influence mechanism of the coupled action of disturbance frequency f and impact area s on the strength weakening effect of sandstone, i.e., high prestressing force is the prerequisite and dominant factor of rock strength weakening, while the perturbation f and the s accelerate the induced rock damage. The fractal dimension D can be used to quantitatively evaluate the fragmentation characteristics of sandstone disturbed by local impact (between 1.68 and 2.14), and it shows a good linear increasing trend with the increase of local impact disturbance.

Słowa kluczowe

EN

deep sandstone; local impact disturbance; uniaxial compression; acoustic emission; fractal dimension

PL

piaskowiec; emisja akustyczna; masyw skalny

• Wydawca: Instytut Mechaniki Górotworu PAN
• Czasopismo: Archives of Mining Sciences
• Rocznik: 2025
• Tom: Vol. 70, no. 1
• Strony: 63--83
• Opis fizyczny: Bibliogr. 47 poz., rys., tab., wykr.

Twórcy

autor

Zhao Jihe

• Liaoning Technical University, College of Civil Engineering, Fuxin 123000, China

• https://orcid.org/0000-0001-7245-4069

autor

Jin Jiaxu

• Liaoning Technical University, College of Civil Engineering, Fuxin 123000, China
• Liaoning Key Laboratory of Mine Subsidence Disaster Prevention And Control, Fuxin 123000, China

• https://orcid.org/0000-0002-2321-2247

autor

Li Yanfeng

• Shenyang Jianzhu University, School of Transportation and Geomatics Engineering, Shenyang 110168, China
• Northeastern University, Key Laboratory of the Ministry of Education on Safe Mining of Deep Metal Mines, Shenyang 110819, China

• https://orcid.org/0000-0003-2153-7934

autor

Wu Pengfei

• Liaoning Technical University, College of Civil Engineering, Fuxin 123000, China

• https://orcid.org/0000-0001-6056-4797

autor

Wang Haibo

• Anhui University of Science and Technology, Anhui Key Laboratory of Mining Construction Engineering, HuaiNan, Anhui, 232001, China

• https://orcid.org/0000-0003-3145-5297

autor

Shi Yingshuang

• College of Science, North China Institute of Science & Technology, Yanjiao, 065201, China

• https://orcid.org/0000-0001-6197-8430

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr POPUL/SP/0154/2024/02 w ramach programu "Społeczna odpowiedzialność nauki II" - moduł: Popularyzacja nauki (2025)