Research on New Semifluid Dynamic Sealing Materials and Sealing Technology
[Purposes]Aiming at the problem that the existing solid sealing material can not plug the na-scent fissure,which leads to the poor effect in the late stage of gas extraction,a new organic mucous seal-ing material is developed,which is composed of adhesive material,expansion agent and particle filling material.[Methods]Firstly,the viscosity,water retention,expansion and sealing properties of the new or-ganic mucus were tested and analyzed,and then the original"three plug and two injection"sealing de-vice was improved,and the three-bag piecework sealing device used with the new organic mucus was de-veloped.In the field test stage,the sealing scheme of gas extraction borehole along bedding was first de-veloped according to the test working face conditions,and the cement sealing material and the new or-ganic mucous sealing material were used for comparative experiments.[Findings]During the observa-tion period of 30 days,the gas extraction concentration and purity of the boreholes sealed with the new or-ganic mucus were greater than that of the boreholes sealed with cement.[Conclusions]The sealing and wrapping property of the new semi-fluid dynamic sealing material is better than that of the cement seal-ing material,and the effect of gas extraction is improved significantly.
gas extractionnew organic mucushole sealing performancehole sealing device
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