Prevention of rock burst by protective seam mining in high-depth strata: a case study

Yi, Enbing

doi:10.21595/vp.2018.20043

Cited by 1 publication

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“…The height of the accumulation body in the fault fracture zone is discussed as (1) If the accumulation body fills the whole space, as shown in Figure 3b, the fo conditions shall be met:…”

Section: Height Of the Collapse Accumulation Bodymentioning

confidence: 99%

“…In recent years, the depth of coal mining is increasing year by year, and coal mine dynamic disasters occur frequently under the action of crustal stress [1,2]. However, when the mining tunnel passes through the fault fracture zone, the crushed stone in the fracture zone is prone to collapse under the mining influence, thus blocking the tunnel.…”

Section: Introductionmentioning

confidence: 99%

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Characteristics of Roof Collapse of Mining Tunnels in the Fault Fracture Zone and Distribution of the Boundary Force of the Accumulation Body

et al. 2022

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Under the influence of coal mining, the gravel in mining tunnel sections of a fault fracture zone is prone to collapse, and the collapse accumulation body will block the tunnel, which has a very adverse influence on the safety production of coal mining and the evacuation of personnel after underground disasters. The macroscopic and mechanical characteristics of the collapse accumulation body have been studied extensively in previous works. The purpose of this paper is to provide theoretical support and reference for the rapid excavation of the tunnel blocked by the collapse accumulation body in the fault fracture zone. Taking the fault fracture zone in the tunnel as the research background, the physical characteristics and boundary mechanical characteristics of the collapse accumulation body in the fault fracture zone are studied by the method of combining on-site investigation and theoretical analysis. The results show that the force acting on the boundary on both sides of the accumulation body is passive resistance from the side wall, which is derived from the slip effect of the accumulation body slope. Similarly, the unstable boundary of the fault fracture zone caused by tunnel instability is elliptical, and the overlying load of the rescue channel to be excavated in the accumulation body is limited. On the basis of the collapse instability dimensions of the broken zone of the tunnel surrounding the rock, the calculation formulas of the height of the accumulation body and the horizontal force at the boundary were established, respectively, under two conditions of whether the collapse space was filled, and whether the curve relationship between the distribution of the horizontal force at the boundary of the accumulation body and the buried depth in the accumulation body was obtained.

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“…The height of the accumulation body in the fault fracture zone is discussed as (1) If the accumulation body fills the whole space, as shown in Figure 3b, the fo conditions shall be met:…”

Section: Height Of the Collapse Accumulation Bodymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%