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首页> 外文会议>The Third International Conference on Nwe Development in Rock Mechanics and Engineering(NDRM'2009)(第三届国际岩石力学与工程新进展学术会议） >EXPERIMENT AND ITS MECHANISM OF IMPROVING THE-PERMEABILITY OF COAL SEAM WITH LONG-HOLE PRE-SPLITTING BLASTING TECHNOLOGY
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EXPERIMENT AND ITS MECHANISM OF IMPROVING THE-PERMEABILITY OF COAL SEAM WITH LONG-HOLE PRE-SPLITTING BLASTING TECHNOLOGY

机译：长孔预裂爆破技术改善煤层通透性的试验及其机理

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摘要

The implementing process of long-hole pre-splitting blasting, change of penetrability of coal seam and acting effect after the implement of long-hole pre-splitting blasting were studied and mechanism of improving the permeability of coal seam with long-hole pre-splitting blasting technology were analyzed in detail from the macro-level and micro-level. The results show that implementing pre-splitting blasting technology in the low permeable coal seam can increase the permeability of coal seam and gas drainage rate. Mechanism of improving the permeability of coal seam with long-hole pre-splitting blasting technology is mainly that fractures spread, porosity increase and the decrease of the thickness of boundary layer. These research results can provide technology references for using long-hole pre-splitting blasting technology to improve gas drainage effect of coal seam.
机译：研究了长孔预裂爆破的实施过程，煤层渗透性的变化以及长孔预裂爆破实施后的作用效果，并提出了通过长孔预裂提高煤层渗透性的机理。从宏观和微观两个层面对爆破技术进行了详细分析。结果表明，在低渗透煤层实施预裂爆破技术可以提高煤层的渗透性和瓦斯抽采率。长孔预裂爆破技术提高煤层渗透性的机理主要是裂缝扩展，孔隙率增加，边界层厚度减小。这些研究结果可为采用长孔预裂爆破技术改善煤层瓦斯抽放效果提供技术参考。

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