温度和放散空间体积对等容变压法测定瓦斯放散初速度的影响分析

在煤矿煤与瓦斯突出防治工作中，瓦斯放散初速度（ΔP）是一个重要的指标。通过资料对比、理论分析、实验研究对瓦斯放散初速度测定中温度、放散空间体积等对测定的影响进行了研究。研究表明瓦斯放散初速度在煤样一定的情况下与放散空间体积和实验温度有关。随着温度的升高，瓦斯放散初速度减小，减小的幅度和煤样自身的瓦斯放散初速度大小有关。放散空间体积越大，瓦斯放散初速度越小；不同煤样放散空间体积对瓦斯放散初速度影响不同。建议瓦斯放散初速度测定应在恒定温度下进行，实验温度建议与井下温度相同，仪器的放散空间体误差应小于1 mL。

Influences of temperature and dissipate space volume on determination of gas initial emission velocity by isobaric variable pressure method

The gas initial emission velocity（ΔP） is an important and widely used indicator in coal mine and gas outburst prevention work.This paper researched temperature and dissipate space volume affected to the determination of gas initial emission velocity based on data comparison，theoretical analysis and experimental research.The research results showed that gas initial emission velocity was related to temperature and dissipate space volume in certain cases of coal samples，with the increase of temperature，the gas initial emission velocity decreased，and the extent of the reduction was related to the initial velocity of the coal sample itself.The larger the volume of the dissipating space and the smaller the initial gas velocity had a corresponding relationship，the influence of the dissipate space volume of different coal samples on gas initial emission velocity was different.It is recommended that the gas initial emission velocity measurement should be conducted at a constant temperature，the experimental temperature should be the same as the downhole temperature，and the instrument′s dispersion space body error should be less than 1 mL.