【摘要】：為了探明點(diǎn)火能量對(duì)煤粉爆炸特性參數(shù)的影響,利用20 L球形爆炸裝置進(jìn)行試驗(yàn)測(cè)試,試驗(yàn)研究了不同點(diǎn)火能量對(duì)煤粉爆炸行為的影響,對(duì)煤粉爆炸猛度(最大爆炸壓力和最大升壓速率)及惰性介質(zhì)的抑爆效力隨點(diǎn)火能量的變化規(guī)律進(jìn)行了重點(diǎn)探討。結(jié)果表明:隨著點(diǎn)火能量的增加,爆炸壓力隨著煤粉濃度的增加呈現(xiàn)先上升后下降的趨勢(shì),在同一濃度下,粉塵最大爆炸壓力和最大升壓速率呈線性上升,在高濃度下,粉塵爆炸壓力受點(diǎn)火能量的影響更顯著;惰性介質(zhì)抑爆效力隨點(diǎn)火能量增加而下降,建議采用5~10 kJ點(diǎn)火能量考察惰性介質(zhì)對(duì)煤粉爆炸的抑制效力。
[Abstract]:In order to find out the effect of ignition energy on the characteristic parameters of pulverized coal explosion, a 20 L spherical explosive device was used to test and study the effect of different ignition energy on the explosion behavior of pulverized coal. The variation of explosion intensity (maximum explosion pressure and maximum boost rate) of pulverized coal and the effect of inert medium on ignition energy are discussed in this paper. The results show that with the increase of ignition energy, the explosion pressure increases first and then decreases with the increase of pulverized coal concentration. At the same concentration, the maximum explosion pressure and the maximum rising pressure rate of dust increase linearly, and at high concentration, the explosion pressure increases linearly and then decreases with the increase of pulverized coal concentration. The pressure of dust explosion is influenced more significantly by ignition energy. The suppression efficiency of inert medium decreases with the increase of ignition energy. It is suggested that the inhibition effect of inert medium on pulverized coal explosion should be investigated by using the ignition energy of 5? 10 kJ.
【作者單位】： 中國(guó)地質(zhì)大學(xué)(北京)工程技術(shù)學(xué)院;
【分類號(hào)】：TD714.5

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