1.Mine Safety Technology Branch, China Coal Research Institute, Beijing , China;2.State Key Lab of Coal Resources High Efficient Mining and Clean Utilization, China Coal Research Institute, Beijing , China;3.School of Resources and Safety Engineering, China University of Mining and Technology (Beijing), Beijing , China

针对我国煤矿井下煤层瓦斯抽采半径测定方法缺少统一标准的问题,对现有确定抽采半径的相关研究成果进行了总结与评述,就抽采半径定义、界定指标和测定方法进行了分析与讨论,对煤层瓦斯抽采半径的直接测定方法进行了分类和比较,建立了煤矿井下抽采半径直接测定的瓦斯储量法,并进行了现场应用实践。研究结果表明:抽采半径的界定指标应根据具体矿井的抽采目的进行科学确定;现有抽采半径的直接测定方法分为瓦斯压力降低法、瓦斯含量降低法、瓦斯抽采流量法、气体示踪法等4类,基于瓦斯抽采流量法改进提出的瓦斯储量法能真实反映矿井瓦斯抽采状况,对现场测试条件要求简单,适用性强,测定结果可靠,可作为可靠的抽采半径井下直接测定方法进行推广应用。

According to a problem of no unified standard to the radius measured method of the seam gas drainage in China coal underground mine, the paper had a summarization and review on the related study on the available gas drainage radius and had an analysis and discussion on the gas drainage definition, the defined index and measured method. The paper had a classification and comparison on the direction measured method of the seam gas drainage radius. Gas Reserves Method of the gas drainage radius direct measured in the underground coal mine was established and was applied to the site application practices. The study results showed that the defined index of the gas drainage radius should be scientifically set up according to the gas drainage purpose of the certain mine. The direct measured method of the available gas drainage radius could divide the gas pressure reduction method, the gas content reduction method, the gas drainage flow method and the gas tracer method. Based on the improvement of the gas drainage flow method, the Gas Reserves Method provided could actually reflect the mine gas drainage status. The requirements of the site test condition would be simple. The Gas Reserves Method would have high suitability,a reliable test result and could be a reliable direct measured method of the gas drainage radius in the underground mine to be promoted and applied.

国家科技重大专项资助项目(2016ZX05067006-003)；国家自然科学基金资助项目(51704164)；国家重点研发计划资助项目(2017YFC0804201)；