Mechanical Response Characteristics of Drilling Hole Circumference under Lateral Pressure Coefficient Effect
WANG Li
LIU Haisheng
QI Xiaohua
MA Yun
GOU Kai
Abstract：In order to ensure the effectiveness of drilling,it is necessary to study the mechanical response characteristics of coal and rock around the drilling hole.A numerical model of drilling holes was constructed,the stress distribution differences caused by complex stress conditions through lateral pressure coefficients were characterized,and the mechanical response characteristics around drilling holes were explored under different lateral pressure coefficients.The research results indicated that at the beginning of drilling,the stress level was low and the force chain distribution was uniform.After adjusting the stress field of the coal body around the borehole,the force chain distribution of the borehole is uneven,resulting in stress concentration.The displacement field around the borehole shows a disc-shaped distribution.As the lateral pressure coefficient increases,the stress levels in the vertical and horizontal directions of the coal rock around the borehole gradually increase,and the vertical and horizontal displacements also gradually increase.When the lateral pressure coefficient is less than 1.0,cracks mainly propagate horizontally,while when the lateral pressure coefficient is greater than 1.0,cracks mainly concentrate in the vertical direction.A theoretical reference for the stability of drilling was provided.
Keywords：drilling holelateral pressure coefficientnumerical simulationmechanical response
Publication Date：2024-08-12
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 57-61 )