摘要
为解决荣华一矿立井施工过程中硅藻岩段井壁大面积破裂问题,采用数值模拟计算对井壁破裂原因、硅藻岩段井壁变形特征、塑性区分布特征、应力分布规律等进行研究分析。依据计算结果对硅藻岩段井壁破裂问题制定井壁加强支护修复方案,并对该方案进行数值计算。数值模拟仿真表明:硅藻岩段井壁南北两侧出现大面积变形,偏移变形区域呈现“水滴状”,井壁径向偏移主要集中在硅藻岩段中下部,且偏移量最大值为12.06 mm。经过修复后,井壁偏移区域显著缩小,偏移量最大值为1.05 mm;同时,经过模拟计算,硅藻岩段井壁塑性区破裂形态呈现上窄下宽的“葫芦状”,井壁破裂主要以剪切破坏为主,同时伴随部分拉伸破坏。修复前,硅藻岩段垂直应力呈现先增长后平缓趋势,分布在距井壁10 m处出现应力集中现象,且峰值应力达到3.1 MPa;井壁修复后,垂直应力呈现出先下降后趋于平缓趋势,且峰值应力达到4.72 MPa。
In order to solve the problem of large-scale rupture of diatomite section wall during the construction of vertical shaft of Ronghua No.1 mine,adopts numerical simulation to study and analyze the causes of rupture of the wall,deformation characteristics of the wall in diatomite section,distribution characteristics of the plastic zone,and the distribution law of the stress.Based on the calculation results,the diatomite section of the well wall rupture problem to formulate the well wall strengthening support repair program,and numerical calculation of the program.Numerical simulation shows that the diatomite section has large deformation on the north and south sides of the well wall,and the offset deformation area shows a"teardrop shape",and the radial offset of the wall is mainly concentrated in the middle and lower part of the diatomite section,and the maximum offset is 12.06 mm.After repair,the offset area of the wall is significantly reduced,and the maximum offset is 1.05 mm;at the same time,the simulation shows that the wall reinforcement support repair plan is based on the calculation results,and the numerical calculation shows that the wall reinforcement support repair plan is based on the calculation results.At the same time,after simulation,the rupture pattern of the plastic zone of the diatomite section shows a"gourd shape"with the upper narrow and lower wide,and the rupture of the well wall is mainly based on shear damage,accompanied by part of the tensile damage;before the repair,the vertical stress in the diatomite section shows a trend of growth and then slowing down,and the distribution of the stress concentration occurs at the distance of 10 m from the wall,and the peak stress reaches 3.1 MPa.The vertical stress after wall repair showed a trend of decreasing and then leveling off,with a peak stress of 4.72 MPa.
作者
张学臣
王治强
张学杰
黄性军
昝永龙
ZHANG Xuechen;WANG Zhiqiang;ZHANG Xuejie;HUANG Xingjun;ZAN Yonglong(Heilongjiang Longmei Mine Construction Co.,Ltd.,Jixi 158100,China;School of Mining Engineering,Heilongjiang University of Science and Technology,Harbin 150022,China)
出处
《煤炭技术》
2025年第9期65-70,共6页
Coal Technology
