Research on the Laws of Overlying Rock Fracture and Energy Release under Different Mining Speeds
Source abstract
Abstract
Mining activities are key triggers for strong mine earthquakes and even rock bursts in coal mines. This study explores the impact of mining speed on the overlying strata’s deformation and energy release through theoretical analysis, numerical simulation, and the digital speckle method. The temporal and spatial evolution characteristics of the impact energy during mining are simulated. The digital speckle method illustrates a positive correlation between rapid mining and increased fracture block degree of overburden rock and roof separation, confirming that accelerated mining speed extends the fracture distance of the stope. Furthermore, numerical simulations establish that both the energy associated with overlying rock breaking and the frequency of energy occurrence events are amplified during rapid mining, in contrast to slow mining. This observation corroborates that escalating mining speed augments the energy dispensed by the breaking of the upper rock. Consequently, this escalation induces a transformation in the energy levels of mine earthquakes, culminating in a heightened incidence of large-energy mine earthquakes.
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Research context
OpenAlex topics: Geomechanics and Mining Engineering · Geoscience and Mining Technology · Rock Mechanics and Modeling
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Mines, China University of Mining and Technology, Xuzhou 221116, China
The State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou 221116, China
School of Geology and Mining Engineering, Xinjiang University, Urumqi 830046, China
Planning and Development Department, Huating Coal Industry Group Co., Ltd., Pingliang 744000, China
Funding
National Natural Science Foundation of China · Ordinary University Graduate Student Scientific Research Innovation Projects of Jiangsu Province
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