The factors influencing the stresses include the winding methed of the hoisting line,the points on the mast,at which both ends of the wireline fixed and the manufacturing accuracy of each section of the mast.

• 影响应力的因素有起升钢丝绳的缠绕方法、钢丝绳两端在井架上的固定位置和井架各段的制造精度。 六次起升实践表明，起升拉力最大达850kN，起升时平稳，无晃动、遇阻现象。