In order to enhance the stability of the coal mine shaft lifting vessel, the structural form of four-corner guide rails is often used to replace the interrupted part of the end tank passage. However, the current design method of four-corner guide rails is based on the design method of the end tank passage. However, due to the great differences in the structural forms and constraints between four-corner guide rails and the end tank passage, the reliability of the force of four-corner guide rails calculated by referring to the design method of the end tank passage is doubtful. In order to solve this problem, the acceleration time history curve of the four-corner guide rails under loading and unloading conditions is obtained through the field test of the force of the four-corner guide rails. By analyzing the time-history curve, the force of the four-corner guide rails is determined, and its characteristics and influencing factors are proved. After further regression analysis, the calculation method of horizontal force and vertical force of four-corner guide rails of coal mine shaft is established considering the lifting terminal load level. The calculation method based on the field test results is reliable and has important significance for improving the stability, safety and economy of the four-corner guide rails.

Adding fiber into soil can enhance the strength characteristics of soil, but it is mostly suitable for easy compaction conditions, and its application of complex conditions is limited. In this paper, preparation of jet straw reinforced loess samples by high pressure air injection, and direct shear tests were carried out to study the influence of fiber content and water content changes on the strength of the reinforced loess. In order to obtain the best mix ratio of reinforced soil under the required working performance, and based on the experimental data, the strength prediction model of reinforced soil under different working conditions is established. The results showed that: (1) The strength of soil presents a trend of "first increasing and then decreasing" to the increase of the content in straw fibe, and the addition of fiber can improve the failure mode of soil and enhance the residual strength and deformation capacity of soil; (2) The change of water content has a significant impact on the cohesion of the soil, but internal friction angle of reinforced soil with high fiber content is greatly affected, but the reinforced soil can still maintain good shear strength under high water content; (3) The decrease of water content is conducive to the reinforcement of fiber on cohesion and internal friction angle, with the decrease of water content, fiber increases soil strength lifting rate showed a trend of "decreasing first and then slowing down"; (4) The fiber content and water content are important factors affecting the shear strength, and the influence of water content should be given priority when predicting the strength; The research results have guided significance of optimizing the performance of reinforced loess, overcoming the blind area of application of fiber reinforced soil in engineering and scientific selection of corresponding design and construction methods.