| Studied by the factors influencing static discharge based on fundamental theory inthe coalmine tunnel through establishment of ESD model, and thus obtained a conclusionthat static discharge of human body in coalmine is mainly depended on humancapacitance C and human resistance R. Furthermore, accordanced with the uniqueness ofelectric field solutions, calculated the human body capacitance value of multi-conductorsystem through simulating calculation, employing the electric-mirror image medium forstatic, promoting multi-mirror multi-image calculation system, and regarding the minetunnel as a rectangular cavity, the human body as a cylinder being perpendicular to thetunnel ground as well as the coalmine tunnel influence as human image—human jungle.In this paper, the relationship between human capacitance C and medium condition,human body, tunnel shape as well as human body position in the tunnel was alsoinvestigated. The calculation shows that the human body capacitance C is very sensitiveto the shape of the tunnel, the figure of human body, and ambient environment influence,but not b related to the human body position in the tunnel. The peak value of humancapacitance can be obtained when the dielectric constant of the ambient environment(r6.3). Introduce anti-static property and anti-igniting property of rubber productionlike convey belt and hairdryer in the tunnel, to fundamentally solve the hidden troubles ofstatic discharge, in order to achieve purpose of safety production. The technology fillingNBR with Nano particle anti-static preparation was also introduced. Under the premisethat the consistency of other conditions are guaranteed, performance of differentanti-static preparations and different anti-static performance of differention densities ofthe same anti-static preparation were respectively calculated through sample test, in the manner of adding different kinds of anti-static preparations and different anti-staticpreparations with differention densities of the same anti-static preparation. It is indicatedthrough the test that: Nano composite material is of a higher anti-static performance thanthose materials which are filled with traditional anti-static preparations. By filling Nanoparticle, surface resistance rate of such composite material can be reduced to106orders ofmagnitude; furthermore, surface resistance rate and bulk resistance rate of Nanocomposite materials obviously become smaller along with constantly enhancement ofNano particle density. During the sample test, different test voltages are applied to thesame sample. The results show that surface resistance rate of Nano composite materials isclosely related to change of voltage. Nano material is of small-size effect. Along withenhancement of voltage, energy of Nano material will accordingly become higher, whichwill greatly increase the possibility of electron transition of body. In such a way, quantumeffect of Nano material can be exercised in a greater degree, to promote more chargedparticles transiting to the conduction band from the valence band, to form a soundconductive channel, so as to reduce surface resistance rate and bulk resistance rate ofNano composite material. Surface treatment technology of Nano particle and processingtechnologies that mechanism, and function of coating of coupling agent against Nanoparticle of material were thoroughly studied from the filing process. It is found from therubber-mixing process that temperature is directly related to the performance ofcomposite material. |
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