煤矿长斜井井筒外荷载特征研究

doi:10.11799/ce201603025

摘要/Abstract

摘要： 采用地压平衡条件和应力坐标变换的方法，对煤矿长斜井井筒外荷载演化规律进行理论分析，建立了圆柱坐标系下的斜井井筒外荷载计算模型。斜井井筒受有径向荷载、环向和轴向剪切荷载等三类荷载。径向荷载、轴向剪切荷载对称于Y轴，环向剪切荷载反对称于Y轴|三类荷载在井筒两帮均为最小，其中剪切荷载为零，径向荷载等于相应垂深立井井筒水平侧压力|在环向角45°和135°两个斜对称轴位置，环向剪切荷载达到最大|轴向剪切荷载以断面水平轴呈上、下反向分布，即水平轴以上方向向下、水平轴以下方向向上。在工程常见的倾斜角0°～30°范围内，外荷载随倾斜角几乎呈线性增加|井筒外半径b对荷载的影响较小，可以忽略。

关键词: 斜井井筒, 外荷载, 井壁应力分布, 分布特征

Abstract: A theoretical model for calculating external load of inclined shaft in the cylindrical coordinate is established. Compared with vertical shaft, inclined shaft has two basic characteristics of complex load type and non-centrosymmetric load distribution. Load of inclined shaft into three categories: radial load, circumferential load, and axial shear load. Differing from vertical shaft that radial load uniformly distributes along the circumference, the radical and axial shear load of inclined shaft are on the Y axially symmetric and the circumferential load is on the Y axially anti-symmetric. All the three types of load achieve a minimum value in the two sides of shaft, the value of shear load is 0 and which of radial load is equal to the lateral pressure of corresponding depth vertical shaft. In the circumferential direction angle 45°and 135°, all the three types of load are not equal to zero, the circumferential shear load achieve a maximum value, which are the key control points of design and calculation. Differing from vertical shaft“vertical additional stress”distribution, inclined shaft axial shear load above and below the horizontal axis plane is reverse distribution, the load direction above the horizontal axis plane is down and below the plane is up, the maximum of the load is 7 times than the “vertical additional stress”of vertical shaft. In the normal project of which inclined angle ranges from 0°to 30°，the external load increased approximately linearly with the inclined angle. The outer diameter b of inclined shaft has a similar effect on load, which can be ignored. Research results provide the basis for the analysis of inclined shaft stress distribution, design theory and calculation methods.

中图分类号:

TD321

周檀君，周国庆，王建州，等. 煤矿长斜井井筒外荷载特征研究[J]. 煤炭工程, 2016, 48(3): 77-80.

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http://www.coale.com.cn/CN/Y2016/V48/I3/77

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