高地应力数理模型的建立及应用

ESTABLISHMENT AND APPLICATION OF THE MATHEMATICAL MODEL FOR HIGH GROUND STRESS

高地应力钻孔缩径现象很常见,一般钻进中只能依靠现场分析及经验来判断缩径情况,这对于预测以及精确计算缩径程度是远远不够的.文中建立了高地应力条件下钻孔的数理模型,推导出了各种应力、应变以及位移的计算公式,并应用这些公式计算了某高地应力矿区钻孔的多种参数,判断了钻孔的稳定性情况.

Hole shrinkages commonly take place under high ground stress. They are usually assessed only by on-thespot analysis and experiences, which are not enough for the prediction and accurate calculation of shrinking. A mathematical model of drilling hole in high ground stress area is established in the paper, thus the calculation formulas for of stress, strain and displacement are derived. With these formulas, the parameters of drilling holes in high ground stress area are calculated, and the stability of the holes is estimated.