Investigation of stability of a tunnel in a deep coal mine in China

Kulatilake, Pinnaduwa H.S.W.; Wu, Qiong; Yu, Zhonghua; Jiang, Fuxing

doi:10.1016/j.ijmst.2013.07.018

Cited by 54 publications

(25 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The original state of a surrounding rock mass is disturbed due to the interactions between the excavation and the far field loading [1,2] and some modifications will occur. The region of significant modification of the rock mass state, involving irreversible deformation with fracture propagation and the development of new cracks, is defined as the Excavation Damaged Zone (EDZ) [3].…”

Section: Introductionmentioning

confidence: 99%

Numerical simulations of failure behavior around a circular opening in a non-persistently jointed rock mass under biaxial compression

Yang

Jing

Chen

2016

International Journal of Mining Science and Technology

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Numerical simulations of failure behavior around a circular opening in a non-persistently jointed rock mass under biaxial compression

Yang

Jing

Chen

2016

International Journal of Mining Science and Technology

View full text Add to dashboard Cite

“…Despite people having known the existence of crustal stress for nearly a century, they still fail to master the essence of the problems and rules regarding the spatial stress field induced by underground mining. Moreover, the design of underground mining projects is usually lacking of adequate scientific bases, and numerous control and support methods of rock strata are lacking of effective means, which ultimately results in underground disasters, such as rib fall of coal walls, roadway roof fall, deformation and damage of support, coal-gas outburst, and casualty among workers [2][3][4]. The deformation and failure of the surrounding rocks of roadways are mainly the result of the strength of surrounding rocks and stress application, the strength of surrounding rocks depends on the lithological characteristics of the rocks, and the stress depends on roadway depth and geological tectonism.…”

Section: Introductionmentioning

confidence: 99%

Similar Physical Simulation on the Deformation of Surrounding Rocks of Floor Roadway Caused by Coal Mining Under Tectonic Stress

Zhang¹,

Wu²,

Wang³

et al. 2017

JESTR

View full text Add to dashboard Cite

At present, the instability of floor roadway is increasingly serious, and even the representative high-performance U-steel support cannot provide roadways with completely effective support. Thus, the mechanism of roadway deformation should be analyzed rather than only considering the roadway support. To study the influence of coal mining on the stability of floor roadways under tectonic stress, taking the floor roadway under No.8 coal seam in Luling Coal Mine in China as the research object, the roadway deformation was tested with and without tectonic stress through the similar physical simulation method. Finally, the changing mechanisms of the stress field, fracture development and displacement field of the surrounding rocks in the floor roadway under mining effects were systematically analyzed. The results show that: (1) under the same stress condition, deformation and fracture of the floor roadway increase with the increase of mining step; (2) without tectonic stress, the maximum hoop stress of the floor roadway arch foot is 32.5 MPa located 2.7 m away from the roadway wall. Meanwhile, under tectonic stress, the maximum stress changes to 38.5 MPa at 3.6 m away from the roadway wall; (3) whether under mining effects or not, the deformation time is longer and deformation failure is larger under tectonic stress. The conclusions indicate the tectonic stress field has significant on roadway deformation and failure, which can provide the technical reference for the optimization of mine roadway layout.

show abstract

“…The advantage of 3DEC software was that it can be better to achieve the separation between the block, rotation and block the process of collapse, and the block can be broken with the new block to achieve contact and mechanical analysis [12~13] . In terms of underground engineering, especially mining works, stope mining and the formation of a mined-out area, the surrounding rock will produce cracks or large-scale collapse, under such conditions, 3DEC software makes the simulation more reasonable of underground mining engineering [14] . Therefore, based on 3DEC as a platform, combined with rock physics and mechanics experiments, ore body and filling body collapse and movement law was discussed in the collapse area, on this basis, grouting reinforcement measures were proposed for the ore body to provide protection in the collapse of the area.…”

Section: Introductionmentioning

confidence: 99%

Large - Scale Unstable Collapse Mechanism of Filling Stope Its Environmental Grouting

Xie¹,

Jia²,

Lü³

et al. 2017

Proceedings of the 2017 International Conference on Material Science, Energy and Environmental Engineering (MSEEE 2017)

View full text Add to dashboard Cite

Abstract. In order to study the law of the destruction of stope collapse of unstable rock and ore filling body underground metal mine. Based on 3DEC discrete element program for the operating platform, taking a collapsed mine ore zone as the project background, and combined experiment of indoor physical mechanics, the dynamic evolution of the unstable rock in this area was studied, and the stope collapse failure slip pattern was revealed. The results show that the ore above instability collapsed stope amounted to sank parties about 2m, the two bodies of the filling body slipped to the mined-out area until the destruction under the action of extrusion. Secondly, Stope produced a total damage when the maximum shear strain zone in the collapse zone is fully penetrated, at this time, "U-shaped" instability of the collapse of the affected area is formed, resulting in the adjacent six stoves to become a dangerous area of mining. Lastly, according characteristics of filling body movement and mode of deformation, the general idea and idea of the reinforcement of the stope in the area of hidden danger is determined, and grouting Grouting reinforcement recommendations are proposed on this basis. The results can provide technical support for the subsequent mining stope in those collapse hazard areas.

show abstract

Investigation of stability of a tunnel in a deep coal mine in China

Cited by 54 publications

References 13 publications

Numerical simulations of failure behavior around a circular opening in a non-persistently jointed rock mass under biaxial compression

Numerical simulations of failure behavior around a circular opening in a non-persistently jointed rock mass under biaxial compression

Similar Physical Simulation on the Deformation of Surrounding Rocks of Floor Roadway Caused by Coal Mining Under Tectonic Stress

Large - Scale Unstable Collapse Mechanism of Filling Stope Its Environmental Grouting

Contact Info

Product

Resources

About