Replacement and pumping technology for coal seams with low gas content and high intensity mining

被引：0

作者：

Song X. ^{[1
,2
]}

Shu L. ^{[1
,2
]}

Wang B. ^{[1
,2
]}

Fan Y. ^{[1
,2
]}

Gong H. ^{[3
]}

Cui C. ^{[1
,2
]}

An F. ^{[4
]}

机构：

[1] China Coal Research Institute, Beijing

[2] State Key Lab of Coal Resources High Efficient Mining and Clean Utilization, China Coal Research Institute, Beijing

[3] School of Emergency Management and Safety Engineering, China University of Mining and Technology-Beijing, Beijing

[4] Shanxi Jinxing Energy Co Ltd, Shanxi, Lyuliang

来源：

Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering | 2023年 / 40卷 / 04期

关键词：

gas injection; high yield and efficiency; low gas deposits; upper corner;

D O I：

10.13545/j.cnki.jmse.2022.0673

中图分类号：

学科分类号：

摘要：

For the effect of conventional gas extraction and coal seam modification technology is poor for the high intensity gas emission in high yield and efficiency mines in low gas coal seams, the technology of gas injection and displacement is proposed, and the field test and application are carried out based on the study of the occurrence characteristics and flow mechanism of coal seam gas. The results show that: under the condition of conventional extraction of low gas coal seams, the pure gas extraction is low, the flow attenuation is fast, and the effect of gas extraction can be improved efficiently after the implementation of gas injection; continuous gas injection is more effective than intermittent displacement; the effect of gas extraction is improved by increasing the gas injection pressure and effective influence range of the injection spacing; within the range of test conditions, actual gas production can be increased by 367. 5% to 487. 6% in comparison to the conventional extraction prediction; the gas injection can achieve the rapid reduction of coal seam gas content and ensure the gas concentration in the upper corner maintain at a low level, the monthly average reduction of coal seam gas in the application section is 0.402 ~ 0.565 m3/t, and the maximum gas concentration in the upper corner is 0.31% . © 2023 China University of Mining and Technology. All rights reserved.

引用

页码：847 / 856

页数：9

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