Probabilistic analysis of a coal mine roadway including correlation control between model input parameters

Booth, A. J.; Marshall, Alec M.; Stace, Rod

doi:10.1016/j.compgeo.2016.01.008

Cited by 8 publications

(2 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the existence of a supporting structure, the formation process will change in the surrounding rock as a result of a new equilibrium state. Displacement formed in this procedure and pressure caused by support will be different under different support conditions [43][44]. With the data collected, the aforementioned questions about the process of load transformation and the interaction principle of the bolt-rock structure will be analyzed and presented in Section 3.1.…”

Section: Collected Statistics For Theoretical Analysismentioning

confidence: 99%

Archives of Mining Sciences

Yuan,

Yang

2021

View full text Add to dashboard Cite

InteractIon PrIncIPle of rock-Bolt Structure and rIB control In large deformatIon roadwaySLarge deformation in roadways is an inevitable problem faced by many coal mines, and bolt installation is widely adopted to keep roadway stability. To provide a theoretical basis for bolt supporting scheme design in order to eliminate hazards associated with roadway failure, the interaction principle between bolts and the bolted strata should be studied thoroughly. This research attempts to investigate the above principle through theoretical analysis through a group of selected statistics from fifteen different coal mines. At the same time, the thick board support method was proposed and applied for controlling the ribs deformation in a particular coal mine. It is concluded that the interaction of the rock-bolt entity is subjected to the fluctuation balance law. When deformation increases, the bolted structure experiences periodic equilibrium variation. Both the supporting force needed to stabilise the surrounding rocks and the supporting capability of bolted strata show a trend of decrease in this process. The interaction principle of surrounding rocks and bolts is in essence the mechanical phenomenon caused by their mutual load transformation, and the load-carrying capacity varies with the bolted structure's deformation, which is subjected to the following law: elastic roadway>plastic roadway> fractured roadway>broken roadway. The designed bolted thickness of the ribs should be more than 1/5 of roadway height to make full use of the self-stability of surrounding rocks. Finite Difference Method simulation and on-site monitoring data showed that the roof subsidence and ribs convergence of 2201 roadway in Shuguang coal mine was reduced by 83.7% and 88.6% respectively after utilising the proposed support method, indicating that the thick-board method was effective. Results of this research can lay a foundation for support design in large deformation roadways.

show abstract

Section: Collected Statistics For Theoretical Analysismentioning

confidence: 99%

Archives of Mining Sciences

Yuan,

Yang

2021

View full text Add to dashboard Cite

show abstract

“…In order to investigate temperature effects on the tensile strength of sandstone, Brazilian disk tests were carried out on heat treated samples of 40mm diameter and 20mm length. Table 1 also shows data for the coal, which were collected from the available literature (Booth et al, 2016;Ranjith et al, 2012;Rybacki et al, 2015;Johnston, 1987). The variation of the coal properties (the magnitude of property variation) with temperature becomes meaningless after it starts burning at 200°C.…”

Section: Temperature Effect On Materials Propertiesmentioning

confidence: 99%

A coupled thermal-mechanical numerical model of underground coal gasification (UCG) including spontaneous coal combustion and its effects

Ekneligoda

Marshall

2018

International Journal of Coal Geology

View full text Add to dashboard Cite

Numerical investigation of failure evolution for the surrounding rock of a super‐large section chamber group in a deep coal mine

Tan

Fan

Liu

et al. 2019

Energy Science & Engineering

View full text Add to dashboard Cite

The stability control of surrounding rock for a large or super‐large section chamber group is a difficult technical problem in deep mining conditions, and this stability control has become one of the most important factors restricting the safety of a large‐scale coal mine. Based on the in‐site geological conditions of a super‐large section chamber group that functions for a coal gangues separation system in the Longgu Coal Mine, we first researched the stress, deformation, and failure characteristics of the in‐site chamber group surrounding rocks by using the FLAC3D software. Simulation results showed that the maximum vertical stress, deformation, and failure range of the surrounding rock for a super‐large section chamber group are larger than those of an ordinary section chamber. In addition, the roof subsidence and the plastic zone radius at the intersection are obviously larger than that of other parts, which increase by approximately 50.8% and 44.4%, respectively. Therefore, the chamber group intersection should be taken as the key area for surrounding rock control. Then, the influences of two key parameters of the chamber group, spacing and angle, were researched in detail to help in the design of the chamber group. Results show that when the chamber spacing is 80 m, the interaction begins to occur. When the angle is 70°, the stress of the surrounding rock and roof subsidence reach the minimum. Thus, the optimum chamber group parameters are determined to be a spacing of 80 m and an angle of 70°. Finally, from the perspective of chamber group stability, the optimal chamber group parameters can better meet the normal use for the super‐large section chamber group. This research provides a reference for the design of a super‐large section chamber group under the same or similar conditions and provides a strategy for controlling the surrounding rock.

show abstract

Probabilistic analysis of a coal mine roadway including correlation control between model input parameters

Cited by 8 publications

References 46 publications

Archives of Mining Sciences

Archives of Mining Sciences

A coupled thermal-mechanical numerical model of underground coal gasification (UCG) including spontaneous coal combustion and its effects

Numerical investigation of failure evolution for the surrounding rock of a super‐large section chamber group in a deep coal mine

Contact Info

Product

Resources

About