采矿与安全工程学报2011，Vol.28Issue(1)：81-85,89,6.
基于瓦斯解吸特性推算煤层瓦斯压力的方法
Determination of Coal Gas Pressure Based on Characteristics of Gas Desorption
摘要
Abstract
For determining coal gas pressure accurately and quickly, a new method is proposed based on characteristics of coal gas desorption.From the analyzing the theoretical solution of gas diffusion from coal cutting, the coal seam gas pressure has a determined relation with gas desorption quantity.In laboratory we measured the desorption data of screened coal sample with a size of 1～3 mm.From the analysis of desorption data we confirm that logarithmic formula can fit desorption curves better than other fitting formulas.Because coefficient A of the logarithmic formula indicates the difference of coal gas desorption characteristics with different gas pressure, it has an exponential relationship with gas pressure.And its value can keep stable with different exposure time.We can use the relationship of coefficient A and gas pressure to calculate gas pressure.关键词
煤层瓦斯压力/解吸特性/对数公式/指数关系Key words
coal seam gas pressure/ desorption characteristic/ logarithmic formula/ exponential relationship分类
矿业与冶金引用本文复制引用
安丰华,程远平,吴冬梅,李伟..基于瓦斯解吸特性推算煤层瓦斯压力的方法[J].采矿与安全工程学报,2011,28(1):81-85,89,6.基金项目
国家重点基础研究发展计划(973)项目(2005CB221503) （973）
国家自然科学基金重点项目(70533050) （70533050）
国家自然科学基金项目(50674089) （50674089）
