Abstract
In view of the use and existing problems of high water cut hydraulic fluid for hydraulic support in Shendong mining area, the water quality of each mine in Shendong mining area was analyzed. The influence of mine water quality on hydraulic fluid was analyzed, including the influence of water hardness, the influence of impurities in water, the influence of sulfate ions and chloride ions, the influence of pH value, the influence of conductivity, and the comparison of different raw liquids and different hydraulic fluids. The matters needing attention in daily use and maintenance of hydraulic fluids were put forward. The corresponding hydraulic fluid should be scientifically selected and reasonably proportioned according to the mine water quality. The real-time monitoring of the hydraulic fluid should be paid attention to. The changes in the water quality, concentration, pH value and microbial situation of the hydraulic fluid should be monitored daily. The maintenance and management of the problems should be carried out in time according to the situation, so as to prevent equipment corrosion and ensure the working stability of the hydraulic system. It can provide reference for the selection, proportioning and maintenance of the high water-cut hydraulic fluid of the mine hydraulic support and ensure the safe and efficient production of the working face.
Highlights
Hydraulic support is the main equipment of fully mechanized coal mining face, and its performance stability is one of the main factors that determine the normal production of coal mining face
The main problems affecting the stability of hydraulic support can be roughly divided into three aspects: one is mechanical structure failure, the second is hydraulic system failure, and the third is electrical control failure
According to the statistics of Shendong mining area, the incidence of mechanical structure failure and electrical control failure is about 30%, and the incidence of hydraulic system failure accounts for about 70%
Summary
Hydraulic support is the main equipment of fully mechanized coal mining face, and its performance stability is one of the main factors that determine the normal production of coal mining face. In the process of using hydraulic support, the hydraulic system may have problems such as poor fluid return [3]. Technical problems such as continuous disassembly and installation of cleaning filter, gate valve blockage, cost increase and environmental pollution will occur in production [4, 5]. The main problems affecting the stability of hydraulic support can be roughly divided into three aspects: one is mechanical structure failure, the second is hydraulic system failure, and the third is electrical control failure. The main reason of hydraulic system failure is mainly caused by improper selection, ratio and maintenance of hydraulic fluid in Shendong mining area. Yifang Liu: Comparative Analysis of High Water Hydraulic Fluid for Hydraulic Support
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