摘要
煤柱稳定既取决于外加载荷,又取决于其内在性态的变化。煤柱的性态变化在于其上方岩梁的作用,应用弹性地基理论建立通用计算模型,在数值解的基础上讨论简化模型的解析解,给出了煤柱内应力分布和极限尺寸的确定公式,并应用该公式对(六兄)州济宁二号井第一水平护巷煤柱尺寸进行了计算分析。
The stability of coal pillars depends upon additional load as well as change of its internal characteristics. Considering the variation of property in coal pillars due to the effect of the upper rock beam, the paper establishes a general model by means of elasto-foundation theory and proposes a formula for determining limited dimension and stress distribution of coal pillars, which has been used to determine the dimension of coal pillars for protecting the main roadways at the first level of Jining No.2 Colliery, Yanzou Bureau through the discussion of a simplified model and its analytic solution on the basis of numerical solution.
关键词
煤柱
应力
分布规律
尺寸
coal
pillars
interal
stresses
distribution
dimension
elastic foundations
theories
