A Method for Arranging a Network of Surface Boreholes for Abandoned Gob Methane Extraction


To optimize the arrangement of a network of surface boreholes for abandoned gob methane extraction, a method for regional division of abandoned gobs based on their connectivity is proposed. Based on vertical and horizontal connectivity criteria, the abandoned gobs in Yangquan Coal Mine No. 3 are divided into 28 regions. Based on the abandoned gob methane sources, a calculation model for abandoned gob methane reserves is established. The abandoned gob methane reserves of connected regions in Yangquan Coal Mine No. 3 are predicted by using the developed estimation model. An abandoned gob methane extraction field test was conducted, and the results showed that the methane flow rate of vertical borehole #1 reached 3.6 m3/min. Based on the test results of vertical borehole #1 and the abandoned gob methane reserve calculation in the connected region, surface boreholes in a connected region were arranged in Yangquan Coal Mine No. 3.


Mining Engineering


Financial support for this work was provided by the Natural Science Foundation of China (No. 51404257), Fundamental Research Funds for the Central Universities (No. 2014QNB39), and the Priority Academic Program Development of Jiangsu Higher Education Institutions (No. SZBF2011-6-B35).

Keywords and Phrases

Abandoned gob methane; Green mining; Methane extraction; Network arrangement; Surface borehole

International Standard Serial Number (ISSN)

0144-5987; 2048-4054

Document Type

Article - Journal

Document Version


File Type





© 2018 The Authors, All rights reserved.

Publication Date

01 Nov 2019