發(fā)布時(shí)間：2018-05-24 17:47

  本文選題：煤與瓦斯突出 + 水力化措施　； 參考：《煤炭科學(xué)技術(shù)》2017年06期

【摘要】：為了研究水力化措施的綜合消突作用,在綜合分析水力化措施作用效應(yīng)的基礎(chǔ)上,將水力化措施歸結(jié)為致裂類和掏槽類,結(jié)合煤與瓦斯突出綜合作用假說(shuō),分別從水力化措施對(duì)煤體卸壓效應(yīng)、瓦斯內(nèi)能以及煤的物理力學(xué)性質(zhì)3個(gè)方面的影響進(jìn)行了分析。結(jié)果表明:水力化措施能夠降低一定范圍內(nèi)煤體的載荷應(yīng)力;煤體吸附瓦斯受到環(huán)境氣體壓力的變化和水分的競(jìng)爭(zhēng)吸附影響,發(fā)生了降壓解吸和置換解吸,水分置換了59.14%的吸附瓦斯,降低了瓦斯內(nèi)能;采取水力措施后煤體水分增加,彈性模量能夠降低58.69%,塑性指數(shù)增大4.3倍以上,降低了煤體彈性能。水力化措施能夠降低煤體承載應(yīng)力、瓦斯內(nèi)能和煤體彈性能,對(duì)煤層消突具有綜合作用。為進(jìn)一步提高水力化措施綜合消突效果,提出執(zhí)行水力化措施時(shí),應(yīng)考慮在注入的水中加入活性劑,增強(qiáng)煤體的濕潤(rùn)效果,致裂類措施還應(yīng)采取卸壓孔來(lái)消除裂縫尖端應(yīng)力集中效應(yīng)。
[Abstract]:In order to study the comprehensive anti-outburst effect of hydraulic measures, on the basis of comprehensive analysis of the effect of hydraulic measures, the hydraulic measures are reduced to fracturing type and cutting type, and combined with the hypothesis of comprehensive action of coal and gas outburst. The effects of hydraulic measures on coal pressure relief, gas internal energy and the physical and mechanical properties of coal are analyzed respectively. The results show that the hydraulic measures can reduce the load stress of coal in a certain range, the gas adsorbed by coal is affected by the change of environmental gas pressure and the competitive adsorption of water, and the desorption and displacement desorption occur. The moisture is replaced by 59.14% of the adsorbed gas, and the internal energy of the gas is reduced, and the elastic modulus of coal can be reduced by 58.69 times, and the plastic index increases by 4.3 times, and the elastic energy of coal is reduced by taking hydraulic measures. Hydraulic measures can reduce the bearing stress of coal body, gas internal energy and elastic energy of coal body, and play a comprehensive role in eliminating coal seam outburst. In order to further improve the comprehensive outburst suppression effect of hydraulic measures, it is suggested that when implementing hydraulic measures, active agents should be added to the injected water to enhance the wetting effect of coal. In order to eliminate the stress concentration effect at the crack tip, the pressure relief hole should be adopted.
【作者單位】： 中國(guó)礦業(yè)大學(xué)(北京)深部巖土力學(xué)與地下工程國(guó)家重點(diǎn)實(shí)驗(yàn)室;煤炭安全生產(chǎn)河南省協(xié)同創(chuàng)新中心;河南省瓦斯地質(zhì)與瓦斯治理重點(diǎn)實(shí)驗(yàn)室-省部共建國(guó)家重點(diǎn)實(shí)驗(yàn)室培育基地(河南理工大學(xué));
【基金】：國(guó)家重點(diǎn)研發(fā)計(jì)劃資助項(xiàng)目(2016YFC0801402) 國(guó)家自然科學(xué)基金青年基金資助項(xiàng)目(51204065) 河南理工大學(xué)博士基金資助項(xiàng)目(B2014-002);河南理工大學(xué)青年骨干教師資助項(xiàng)目(72105/149)
【分類號(hào)】：TD713.3

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