A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Determination and Engineering Practice of Unsupported Roof Distance for Rapid Excavation of Roadway with Thick and Hard Basic Roof
https://orcid.org/0000-0001-7807-3128
Abstract In order to determine the reasonable empty roof distance during roadway excavation, a mechanical model of the direct roof rock beam was established, and the relationship between the direct roof tensile stress and the empty roof distance was obtained. According to the criterion of roof stability, that is, the tensile stress of the roof does not exceed the tensile strength, the expression of the empty roof distance during the roadway excavation is determined. Taking the 150,802 roadway in Liuzhuang coal mine as the research background, the horizontal and vertical stress distribution characteristics of the direct roof under different supporting forces are analyzed, and combined with the direct roof surplus safety factor, the reasonable empty roof distance during roadway excavation is determined as 2.0 m. By using FLAC3D numerical simulation software to analyze the distribution law of vertical stress and plastic zone when the empty roof distance is 2.0 m, it is obtained that the overall stability of the roadway surrounding rock within the empty roof area is better when the empty roof distance is 2.0 m, and it is applied to Liuzhuang Coal mine 150,802 roadway. The field application results show that when the empty roof distance is selected as 2.0 m during roadway excavation, the deformation of the roof and bottom of the roadway and the two sides are small, the stability is good, and the roadway excavation speed is increased by about 30%.
Determination and Engineering Practice of Unsupported Roof Distance for Rapid Excavation of Roadway with Thick and Hard Basic Roof
https://orcid.org/0000-0001-7807-3128
Abstract In order to determine the reasonable empty roof distance during roadway excavation, a mechanical model of the direct roof rock beam was established, and the relationship between the direct roof tensile stress and the empty roof distance was obtained. According to the criterion of roof stability, that is, the tensile stress of the roof does not exceed the tensile strength, the expression of the empty roof distance during the roadway excavation is determined. Taking the 150,802 roadway in Liuzhuang coal mine as the research background, the horizontal and vertical stress distribution characteristics of the direct roof under different supporting forces are analyzed, and combined with the direct roof surplus safety factor, the reasonable empty roof distance during roadway excavation is determined as 2.0 m. By using FLAC3D numerical simulation software to analyze the distribution law of vertical stress and plastic zone when the empty roof distance is 2.0 m, it is obtained that the overall stability of the roadway surrounding rock within the empty roof area is better when the empty roof distance is 2.0 m, and it is applied to Liuzhuang Coal mine 150,802 roadway. The field application results show that when the empty roof distance is selected as 2.0 m during roadway excavation, the deformation of the roof and bottom of the roadway and the two sides are small, the stability is good, and the roadway excavation speed is increased by about 30%.
Determination and Engineering Practice of Unsupported Roof Distance for Rapid Excavation of Roadway with Thick and Hard Basic Roof
https://orcid.org/0000-0001-7807-3128
Abstract In order to determine the reasonable empty roof distance during roadway excavation, a mechanical model of the direct roof rock beam was established, and the relationship between the direct roof tensile stress and the empty roof distance was obtained. According to the criterion of roof stability, that is, the tensile stress of the roof does not exceed the tensile strength, the expression of the empty roof distance during the roadway excavation is determined. Taking the 150,802 roadway in Liuzhuang coal mine as the research background, the horizontal and vertical stress distribution characteristics of the direct roof under different supporting forces are analyzed, and combined with the direct roof surplus safety factor, the reasonable empty roof distance during roadway excavation is determined as 2.0 m. By using FLAC3D numerical simulation software to analyze the distribution law of vertical stress and plastic zone when the empty roof distance is 2.0 m, it is obtained that the overall stability of the roadway surrounding rock within the empty roof area is better when the empty roof distance is 2.0 m, and it is applied to Liuzhuang Coal mine 150,802 roadway. The field application results show that when the empty roof distance is selected as 2.0 m during roadway excavation, the deformation of the roof and bottom of the roadway and the two sides are small, the stability is good, and the roadway excavation speed is increased by about 30%.
Determination and Engineering Practice of Unsupported Roof Distance for Rapid Excavation of Roadway with Thick and Hard Basic Roof
Yang, Sen (author) / Hua, Xinzhu (author) / Yang, Peng (author) / Liu, Xiao (author)
2021
Article (Journal)
Electronic Resource
English
BKL:
57.00$jBergbau: Allgemeines
/
38.58
Geomechanik
/
57.00
Bergbau: Allgemeines
/
56.20
Ingenieurgeologie, Bodenmechanik
/
38.58$jGeomechanik
/
56.20$jIngenieurgeologie$jBodenmechanik
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