煤田地质与勘探2017，Vol.45Issue(2)：45-49,5.DOI:10.3969/j.issn.1001-1986.2017.02.008
井下高压水射流切割煤层增透效果数值模拟
Numerical simulation study on permeability enhancement effect of high pressure water cutting coal seam
摘要
Abstract
For permeability enhancement technology of high pressure water cutting coal seam, the effect of pres-sure relief in different coal (soft and hard coal), the corresponding slot number and the cutting depth were analyzed trough numerical simulation. The numerical simulation study was realized by three-dimensional finite element model established by the numerical simulation software FLAC3D. The results showed that the released pressure and distortion range of soft coal were respectively about 1.8 and 2.6 times higher than hard coal's when the hydraulic cutting radius was the same. When the slot radius increased from 0.5 m to 1 m, the area of which pressure was 90% of the original and distortion range increased respectively to 1.56 times and 1.66 times. The drilling pressure relief and the deformation range of coal increased significantly which were caused by the mutual influence emerged between the slots, the hydraulic coal cutting area presents the overall pressure relief. The error range is 0.46% to 9.84% when the released range of the numerical simulation was compared with the results of theoretical formula, it shows that it is re-liable to use numerical simulation to study the effect of permeability enhancement of hydraulic cutting.关键词
水力切割/增透效果/数值模拟/煤体结构/FLAC3DKey words
hydraulic slotting/anti-reflection effect/numerical simulation study/coal structure/FLAC3D分类
矿业与冶金引用本文复制引用
孙四清,郑凯歌..井下高压水射流切割煤层增透效果数值模拟[J].煤田地质与勘探,2017,45(2):45-49,5.基金项目
国家科技重大专项课题(2011ZX05041-003) National Science and Technology Major Project(2011ZX05041-003) （2011ZX05041-003）
