钻孔卸压防治岩爆机理的试验研究进展与展望

doi:10.19952/j.cnki.2096-5052.2023.02.01

Hazard Control in Tunnelling and Underground Engineering

2023, Vol. 5

Issue (2): 1-23 DOI: 10.19952/j.cnki.2096-5052.2023.02.01

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Progress and prospect of experimental research on the mechanism of rockburst prevention and control by drilling pressure relief

GONG Fengqiang, HE Zhichao

School of Civil Engineering, Southeast University, Nanjing 211189, Jiangsu, China

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Abstract The paper reviewed the experimental research progress of prefabricated drilling and high stress real-time drilling in analyzing the mechanism of drilling pressure relief(DPR)for preventing rockburst disasters from the perspectives of macroscopic(mechanical behavior characteristics, failure characteristics, energy evolution)and microscopic(crack evolution), and elaborated on the rationality and effectiveness of DPR for preventing rockburst disasters. Theoretical research and experimental analysis had confirmed that DPR was a key technology for relieving high stress and high energy in deep surrounding rocks, providing a reference for optimizing the application of DPR to prevent rockburst. High stress real-time drilling test method was a more scientific new research method that revealed the internal mechanism of DPR to prevent rockburst. Based on this, six development directions had been proposed for the experimental research on the mechanism of rockburst induction and the current technical conditions of multifunctional testing systems to analyze the mechanism of DPR to prevent rockburst: developing high-stress drilling rig test equipment compatible with true triaxial test systems; considering disturbance factors in high-stress real-time DPR simulation tests; simulating real-time DPR test after excavation of deep tunnels(roadway)("3D six-sided loading-single-sided unloading-real-time DPR" test); constructing an analytical model for the energy evolution of surrounding rock under 3D high stress real-time DPR; exploring the relationship between the spatial size effect of pressure relief drilling and the stress field and internal energy dissipation mechanism of surrounding rock; establishing a computational model for rockburst prevention by DPR in large-scale high-stress surrounding rock based on numerical simulation software.

Key words： rockburst drilling pressure relief deep tunnel high stress strain energy evolution

Received: 28 February 2023 Published: 20 June 2023

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GONG Fengqiang,HE Zhichao. Progress and prospect of experimental research on the mechanism of rockburst prevention and control by drilling pressure relief[J]. Hazard Control in Tunnelling and Underground Engineering, 2023, 5(2): 1-23.

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http://tunnel.sdujournals.com/EN/10.19952/j.cnki.2096-5052.2023.02.01 OR http://tunnel.sdujournals.com/EN/Y2023/V5/I2/1

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