Study On The Inhibition Characteristics Of New Suspension Colloid For Mine

The frequency of coal mine fires seriously endangers the personal safety of mine workers,resulting in waste of resources,economic losses and environmental pollution.Because coal self-ignition is one of the important factors leading to coal mine fire,coal self-ignition inhibitor has become an important measure for underground fire prevention.At present,the research on coal self-ignition inhibitor involves all aspects,but yellow mud grout is still the most widely used resistance technology.In view of the defects such as easy loss of yellow mud grout and blocking of pipes,this paper puts forward the concept of shell polysaccharide suspension loess,and studies the suspension effect of loess suspension collosite and the effect of coal resistance.Based on the physical and chemical properties of shell polysaccharides and loess,this paper compares and analyzes the suspension effect of different concentrations of shell polysaccharide solution on loess,and fnds that the suspension rate of loess polysaccharide solution increases gradually with the increase of the concentration of crustacean solution.When the concentration of shell polysaccharide solution exceeds 0.5%,the subsidion time can reach more than 60h and the suspension rate can reach more than 79%.The water preservation rate of the compound collusion with citrate was higher than that of single-shell polysaccharide solution wherein the compound collusion water preservation effect of adding sodium citrate was better,and the water preservation rate of drying 40h at 70 degrees C was stable at about 30%.Micro-function group and heating weight change analysis was carried out by Fourier infrared spectrometer and synchronous thermal analyzer for coal samples treated with different concentrations of shell polysaccharide solution and 0.2%concentration of calcium citrate,sodium citrate and calcium citrate,and the content of shell polysaccharide solution methyl and methylene group was found to be higher than that of raw coal samples compared with changes in the temperature points of the primary coal samples.0.3%concentration of shell polysaccharide solution treatment coal sample heating with the lowest weight loss,indicating 0.2%The concentration of shell polysaccharide solution has a promoting effect on the shedding of fatty hydrocarbons,while the 0.3%concentration of shell polysaccharide solution has a good inhibitory effect on coal self-ignition.Calcium citrate composite collosome K2C has a good dissolving effect on medehyl,methyl and aromatic hydrocarbons,iron citrate composite collusion K2F has a good effect on oxygen-containing hydrogenic group dissolution and delays the characteristic temperature point back the most,indicating that citrate significantly improves the blocking effect of the compound collosite on coal,wherein the iron citrate composite collosus dissolves the official energy group and delays the thermal weight loss of coal.Through the program heating-gas chromatography joint instrument for different concentrations of shell polysaccharide suspended loess composite collosus treatment coal samples and the addition of iron citrate,sodium citrate,calcium citrate 0.2%concentration shell polysaccharide suspended loess composite collusion treatment coal samples in the oxidation process Gas concentration change analysis,compared with the experimental results of raw coal samples,it can be learned that with the increase of the concentration of shell polysaccharide solution,the resistance effect of loess composite collosite on coal increased and then decreased,and the resistance effect of 0.3%concentration shell polysaccharide solution on coal was better.The blocking performance of the composite collosus with citric acid was further improved,with the blocking rate of the compound collosus added with iron citric acid reaching up to 74%at 120 degrees C.Figure[32]table[7]reference[91]...