Return the column requires two people to cooperate, one person back to the column, one person to observe the top plate. When returning to the column, operators must work in a safe and secure location.
1. Choose the appropriate psop size based on the height of the roadway at the site. According to the pressure of the top surface of the working face and determine a reasonable support density.
Partial scratches and deformations of hydraulic equipment are common problems with single hydraulic props.
When the single hydraulic prop is used on the working surface, the following operations must be completed as required:
From January to August 2018, the amount of national railway cargo transmission continued to grow at a high speed, with a total completion of 2.084 billion tons, an increase of 7.7%.
