采矿与安全工程学报2013，Vol.30Issue(1)：132-135,142,5.
分组测压确定瓦斯有效抽采半径试验研究
Grouped pressure test to determine effective gas drainage radius
摘要
Abstract
In this paper, to accurately measure the effective radius and identify the reasonable arrangement of drainage borehole spacing, the arrangement of drilling holes in the traditional gas pressure measurement were improved appropriately. In the same height, unequal spacing of pressure measurement boreholes and drainage holes were arranged separately, the effective extraction radius was then determined by monitoring the gas pressure changes in different borehole groups, and the field test was practiced in Tingnan coal mine. The stress drop curves show that the gas around the drainage holes flows in a state of linear seepage in the early drainage period, then gradually turns to low-speed nonlinear seepage with extraction time prolonged, while the gas pressure and extraction time basically shows power function correlation in the whole curve. Moreover, the effective drainage radius reaches to 4 meters after 40 days gas extraction, and the influence scope of gas drainage expands no longer after the radius up to 5 meters.关键词
有效半径/瓦斯压力/瓦斯抽采/压降曲线Key words
effective radius/ gas pressure/ gas drainage/ stress drop curve分类
矿业与冶金引用本文复制引用
梁冰,袁欣鹏,孙维吉,王岩,赵海波..分组测压确定瓦斯有效抽采半径试验研究[J].采矿与安全工程学报,2013,30(1):132-135,142,5.基金项目
国家重点基础研究发展计划(973)项目(2011CB201206) （973）
大型油气田及煤层气开发国家重大专项基金项目(2011ZX05040-2) （2011ZX05040-2）
