High-performance springs ensure maximum production safety
The spring-buffered safety receiving device solves the problem of safely supporting the shaft lifting cage and overcomes many defects of the socket and the cradle, especially in the case that the entire lifting system does not need any technical transformation, only the supporting device is modified. It can shorten the lifting cycle time, which not only saves the electricity consumption of the tank adjustment time, but also significantly improves the lifting efficiency. In addition, the gas emission from the goaf is reduced, and finally the gas concentration in the return air flow of the working face is reduced, and the purpose of safe production of the working surface is ensured.
Use the adjustment wind window to change the amount of wind passing through the work surface. As the cross-section of the wind window increases gradually, the working air volume in parallel with it gradually decreases, and the gas concentration in the return air flow of the working surface gradually decreases. Before the implementation of the scheme, the air volume of the working face is 710m3/min, and the gas concentration in the return air flow is as high as 0.81%. After the A and B dampers are changed to adjust the wind window, when the air volume of the A regulating wind window reaches 150m3/min, the working surface air volume Reduced to 580m3 / min, at this time, the gas concentration in the return flow of the working face fell to 0.52%.
In the case of meeting the wind volume of the working face, the damper that is connected in parallel with the branch is changed to the regulating wind window, which can reduce the energy consumption.
(1) Under certain conditions, the use of pressure equalization technology to control the gas emission from the goaf in the working face is an effective and economical safety technical measure.
(2) For mines without pumping conditions, the pressure equalization technique can be used to treat the gas emission from the goaf, but when the pressure equalization scheme is selected, the actual conditions of each mine should be combined. When the objective conditions permit, the fan and the wind window are combined to adjust, the effect will be better.
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