Geomechanical assessment of deep-level mining conditions in the Yuzhnoe complex ore deposit

Rasskazov, I. Yu.; Kursakin, Gennady; Potapchuk, M. I.; Miroshnikov, V. I.; Freidin, A. M.; Osadchy, S. P.

doi:10.1134/s1062739148050127

Cited by 3 publications

(1 citation statement)

References 3 publications

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“…В области концентрации тангенциальных напряжений на контуре горной выработки бурят строчку параллельных скважин. Ниже приведены результаты численного и физического моделирования, а также данные исследования геомеханических процессов при образовании разгрузочной щели, которое имитируют фактически применяемые параметры разгрузки [11][12][13][14].…”

Section: Introductionunclassified

Efficiency evaluation of destressing drilling by numerical and physical modeling toward rockburst nonhazardous conditions in mines

Bagautdinov¹,

Zuev²,

Streshnev³

2023

gzh

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The article puts forward and describes an integrated numerical/physical modeling procedure to improve evaluation efficiency of destressing drilling aimed at creating rockburst unhazardous conditions in underground openings. When rocks in the interwall space reaches the limit state under the action of rock pressure, the zones of stress concentration displace from the boundary of an underground opening into the depth of rock mass. As a result of the proposed activity implemented in underground mines of Apatit's Division in Kirovsk, the risk of an underground rock burst was reduced essentially

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Section: Introductionunclassified

Efficiency evaluation of destressing drilling by numerical and physical modeling toward rockburst nonhazardous conditions in mines

Bagautdinov¹,

Zuev²,

Streshnev³

2023

gzh

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Experimental study on the significance of pressure relief effect and crack extension law under uniaxial compression of rock-like materials containing drill holes

Tai,

Li,

et al. 2024

Sci Rep

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The drilling pressure relief technology is an effective way to reduce the accumulation of elastic energy in the tunnel envelope, which can reduce the risk of regional ground pressure occurrence. However, there is a lack of theoretical guidance on which drilling parameter has the greatest degree of influence on the effectiveness of pressure relief. The uniaxial compression tests were conducted to study the relationships between drilling parameters (the diameter, depth, and spacing) and the mechanical properties and deformation modulus of specimens. The results show that: (1) The drilling diameter (DDR) and drilling depth (DDH) of single-hole specimens negatively correlate with the peak-failure strength and deformation modulus, while the drilling spacing (DS) of double-hole specimens positively correlates with the peak-failure strength and deformation modulus. It shows that the borehole diameter has a more significant effect on the decompression effect. (2) With the help of the Grey Relational Analysis, the factors affecting the peak-failure strength and deformation modulus of the drilled specimens were ranked in significance. From the largest to the smallest, they are DDR, followed by DDH and DS. (3) The role of the pressure relief mechanism is to transfer the high stress in the shallow part of the roadway to the deep part, reduce the peak strength of destruction and deformation modulus of the peripheral rock in the drilled section, so that the characteristics of the mechanical behavior of the rock are significantly weakened, and the range of the area of the drilled hole decompression is enlarged. During the loading of the borehole, the borehole stress field dominates in the early stage, and cracking starts near the borehole along the direction perpendicular to the direction of maximum principal stress (horizontal direction). In the later stage, the maximum principal stress field dominates and vertical cracks with large widths appear. During crack expansion, the plastic energy dissipation effect is enhanced and the deep impact conduction path is weakened, thus protecting the roadway. This study determined the significance of the pressure relief effect of different drilling parameters, which can guide reasonable modifications of drilling parameters in the field.

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Geomechanical assessment of mining conditions in the Khingansk manganese ore body

et al. 2014

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Geomechanical assessment of deep-level mining conditions in the Yuzhnoe complex ore deposit

Cited by 3 publications

References 3 publications

Efficiency evaluation of destressing drilling by numerical and physical modeling toward rockburst nonhazardous conditions in mines

Efficiency evaluation of destressing drilling by numerical and physical modeling toward rockburst nonhazardous conditions in mines

Experimental study on the significance of pressure relief effect and crack extension law under uniaxial compression of rock-like materials containing drill holes

Geomechanical assessment of mining conditions in the Khingansk manganese ore body

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