国家创新群体基金资助项目(50921063);重庆市杰出青年基金资助项目(CSTC,2009BA6047);重庆大学研究生科技创新基金资助项目(2001005B1B0010342)
高压脉冲水射流割缝是新型有效的增透技术，但增透机理尚未明确，制约了其在不同赋存条件煤层中的推广应用。文中从煤基质收缩提高煤层透气性角度出发，在分析高压水射流冲击煤体的动态效应基础上，得出冲击动态方程；理论分析了在高压脉冲水射流作用下煤基质的受力状态，得出了高压脉冲水射流能够促使煤基质收缩，并推导出射流冲击力-煤基质的关系方程，在此基础上采用P-M模型，得出射流作用下煤层内瓦斯渗流方程，为高压脉冲水射流割缝增透技术的推广应用提供了理论支撑。
High pressure pulsed water jet (HPWJ) is a new technology of effectively improving coal seam permeability. However, the mechanism of increased permeability is not yet clear, which restricts the application of HPWJ in different coal seams. From the perspective of improving permeability by coal matrix shrinkage, the impelled dynamic equations is established based on analysis of coal dynamic effects by water jet. According to theoretical analysis of the stress state of coal matrix, it is concluded that HPWJ can promote coal matrix shrinkage, and the relationship equation between jet impact-coal matrix is derived. Besides, the gas seepage function in the coal slotted by the HPWJ is gained by using PM model, which provides theoretical support for generalizing the technology in the coal mine.
卢义玉,宋晨鹏,刘勇,康勇.水射流促进煤基质收缩提高煤层透气性机理分析[J].重庆大学学报,2011,34(4):20-23.
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