煤矿安全2019，Vol.50Issue(5)：19-22,4.DOI:10.13347/j.cnki.mkaq.2019.05.005
基于达标抽采量的顺层预抽钻孔抽采半径确定方法
Determination Method of Drainage Radius of Pre-draining Boreholes Based on Standard Evaluation of Drainage Capacity
摘要
Abstract
In view of the problem of poor practicability of the existing method for measuring the effective drainage radius of coal seam, especially the problem of high sealing requirement in the pressure drop method, a new method is proposed to determine the extraction radius based on the extraction time required by the extraction standard. Through the test of the variation of the gas extraction volume with the extraction time, the total extraction time is determined and the extraction time of different extraction intervals is obtained. Finally, the reasonable extraction distance is determined, and the present field test is carried out in the coal mine of Zhengzhu Coal Mine. Field tests showed that the pre-pumping time of drainage distance of group 2 m, group 3 m and group 4 m were 236 d, 260 d and 273 d respectively. According to the fitting formula between the spacing of the extraction boreholes and the time of pumping and the standard time, when the design time is 240 days, the effective extraction radius is 1 m.关键词
抽采达标/顺层钻孔/抽采半径/抽采量/瓦斯抽采Key words
gas drainage standards/holes along coal seam/extraction radius/drainagecapacity/gas drainage分类
矿业与冶金引用本文复制引用
梁文勖..基于达标抽采量的顺层预抽钻孔抽采半径确定方法[J].煤矿安全,2019,50(5):19-22,4.基金项目
国家重点研发计划资助项目(2017YFC0804202,2017YFC0804203) （2017YFC0804202,2017YFC0804203）
国家自然科学基金资助项目(51674143,51404140,51574150) （51674143,51404140,51574150）
中煤科工集团科技创新基金重点资助项目(2014ZD008) （2014ZD008）
