Investigation of Mining-Induced Fault Reactivation Associated with Sublevel Caving in Metal Mines

Xia, Kaizong; Chen, Congxin; Wang, Tianlong; Yang, Kuoyu; Zhang, Chuqiang

doi:10.1007/s00603-022-02959-9

Cited by 16 publications

(12 citation statements)

References 50 publications

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“…The rock specimens and test process are illustrated in Figure 3. The approximate mechanical parameters of the surrounding rock were obtained by the laboratory rock mechanics test using the Hoek-Brown strength criterion (Kaizong et al, 2022;Xia et al, 2022). The final rock parameters in Table 1 are adjusted based on the investigation of the rock structure characteristics and the analysis of the rock disturbance.…”

Section: Mechanical Parameters Test Of the Surrounding Rockmentioning

confidence: 99%

Law of strata pressure behavior of surrounding rock in nearby goaf roadway for extra-thick coal seams of Datong mine area

Lian

et al. 2023

Front. Earth Sci.

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The nearby goaf road in the extra-thick coal seam of the Datong mining area exhibits intense strata pressure behavior, which affects the working face mining. Herein, we study the laws of the strata pressure behavior of this road in detail using various methods, including laboratory tests, theoretical analyses, numerical simulation, and field monitoring. Considering the mine pressure characteristics of the nearby goaf road, namely, roof cracking, two-side deformation, and floor heaving, the mechanical tests and theoretical failure analyses of the surrounding rock in the mining-induced non-uniform stress field were carried out. The circular-oval-butterfly failure trend of the surrounding rock in the nearby goaf road under the influence of mining was obtained. The steady failure evolution lateral pressure coefficient (λ=0.5∼1.8) and butterfly mutation lateral pressure coefficient (λ<0.35 or λ>2.1) of the surrounding rock in the nearby goaf road were analyzed. We performed numerical simulation to study the stress field and the plastic zone shape-size characteristics of the surrounding rock during excavation and mining (with or without the top extraction road), and the theoretical law of the mine pressure was obtained for the Tong Xin coal mine. Finally, field monitoring indicates that the mine pressure behavior of the nearby goaf road exhibits spatial differences, namely, the difference between the stresses of the two sides and roof, and the stress characteristics of the deep and shallow surrounding rock. The findings of this study on the mine pressure behavior in the nearby goaf road have great practical significance for targeted measures to control the surrounding rock stability.

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Section: Mechanical Parameters Test Of the Surrounding Rockmentioning

confidence: 99%

Law of strata pressure behavior of surrounding rock in nearby goaf roadway for extra-thick coal seams of Datong mine area

Lian

et al. 2023

Front. Earth Sci.

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“…Li and Xia et al [ 17 , 38 ] proposed that the movement angle boundary should be the boundary of broken rock mass rather than the boundary of the mined-out orebody. Between fault F4 and goaf, the rock mass was broken to a significant extent.…”

Section: Characteristics Of the Ground Movementmentioning

confidence: 99%

“…The mechanical model of the fault slip was derived, and the theoretical calculation formula ( 5 ) of the fault slip was obtained [ 45 ]. Xia et al [ 17 ] used this formula to verify the fault will slide down when θ = 65°, λ = 0.35, and φ f = 28°. …”

Section: Theoretical Analysis Of the Ground Movement Mechanismmentioning

confidence: 99%

“…Considering the effect of horizontal in situ ground stress, steeply dipping faults and discontinuities, the traditional definition of movement angle will be much smaller than the designed movement angle (about 12°). Therefore, Xia et al [ 17 ] proposed to move the boundary of the movement angle to the fault. In the present work, the boundary of the movement angle was moved to the F4 fault, as shown in Fig.…”

Section: Theoretical Analysis Of the Ground Movement Mechanismmentioning

confidence: 99%

“…Nearly all the plane displacement vectors in the mining area were found to point toward the mined-out area [ 13 , 14 ]. In their studies on the Jinshandian Iron Mine, Xia K et al found that the ratio of the horizontal to vertical displacement generally increased the further, one moved away from the boundary of the mined voids, and fault reactivation played an important role in ground movement [ 15 – 17 ]. Other methods, such as differential interferometric synthetic-aperture radar, FLAC3D, and modification of the influence function, were also used to study ground movement and surface collapse in other mines [ 18 – 21 ].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Ground Movement in the Hanging Wall of Underground Iron Mines with Steeply Dipping Discontinuities: A Case Study

et al. 2023

Self Cite

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To ensure the safety of underground mining activities and effectively protect the surface production facilities and houses of the nearby residents, the ground movement caused by the sublevel caving method needs to be studied. In this work, the failure behaviors of the surface and drift of the surrounding rock were investigated based on the results of in situ failure investigations, monitoring data, and engineering geological conditions. The results were then combined with theoretical analysis to reveal the mechanism responsible for the movement of the hanging wall. Driven by the in situ horizontal ground stress, horizontal displacement plays an imperative role in both the movement of the ground surface and underground drifts. Accelerated movement is found to occur in the ground surface which coincides with the occurrence of drift failure. Failure occurs in the deep rock masses and then gradually propagates to the surface. The steeply dipping discontinuities are the main reason for the unique ground movement mechanism in the hanging wall. As steeply dipping joints cut through the rock mass, the rock surrounding the hanging wall can be modeled as cantilever beams subjected to in situ horizontal ground stress and lateral stress due to caved rock. This model can be used to obtain a modified formula for toppling failure. Also, a mechanism of fault slipping was proposed, and the condition required for fault slipping was obtained. Based on the failure mechanism of steeply dipping discontinuities, the ground movement mechanism was proposed considering the horizontal in situ ground stress and caved rock mass: slippage of fault F3, slippage of fault F4, and toppling of rock columns. Based on the unique ground movement mechanism, the goaf surrounding rock mass could be divided into six zones: a caved zone, a failure zone, a toppling-slipping zone, a toppling-deformation zone, a fault-slipping zone, and a movement-deformation zone.

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Advancing Geotechnical Analysis with Octree-based Processing: Voxel-Level Integration of Mobile Laser Scanning Data, Geological Models, and Microseismic Data

Fahle,

Petruska,

Walton

et al. 2024

Rock Mech Rock Eng

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Investigation of Mining-Induced Fault Reactivation Associated with Sublevel Caving in Metal Mines

Cited by 16 publications

References 50 publications

Law of strata pressure behavior of surrounding rock in nearby goaf roadway for extra-thick coal seams of Datong mine area

Law of strata pressure behavior of surrounding rock in nearby goaf roadway for extra-thick coal seams of Datong mine area

Ground Movement in the Hanging Wall of Underground Iron Mines with Steeply Dipping Discontinuities: A Case Study

Advancing Geotechnical Analysis with Octree-based Processing: Voxel-Level Integration of Mobile Laser Scanning Data, Geological Models, and Microseismic Data

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