Application of the retained gob-side gateroad in a deep underground coalmine. Issue 5 (2nd September 2016)

• Record Type: Journal Article
• Authors: Zhang, Zhiyi; Shimada, Hideki; Qian, Deyu; Sasaoka, Takashi
• Is Part Of: International journal of mining, reclamation and environment. Volume 30:Issue 5/6(2016)
• Page Start: 371
• Page End: 389
• Publication Date: 2016-09-02
• Subjects: Deep underground coalmine -- retained gob-side gateroad -- stress evolution -- staged roadway supporting -- roadway maintenance; Mining engineering -- Periodicals; Mineral industries -- Environmental aspects -- Periodicals; Abandoned mined lands reclamation -- Periodicals; 622.292
• DOI: 10.1080/17480930.2015.1093729
• Languages: English
• ISSNs: 1748-0930

Abstract

Abstract: Zhuji coalmine, a typical deep underground coalmine located in Huainan city, Anhui province of China, is characterised by rich gas, high in situ stress and low permeability. These geotechnical conditions cause serious problems including outburst, excessive gas emissions in the upper corner of the coal face, and low resource recovery resulting from large remaining coal pillars when using conventional mining methods. Retained gob-side gateroad (RGSG) is proposed to resolve these problems by eliminating the large coal pillars and extracting gas simultaneously. To achieve a scientific and reasonable application of the RGSG in the Zhuji coalmine, stress evolution in the surrounding rock of this roadway was studied using FLAC3D numerical simulation method. Then, a staged supporting strategy and corresponding parameters were proposed in terms of the characteristics of stress evolution. Finally, the effectiveness of the proposed method was discussed based on the field measurements and roadway maintenance was carried out for reuse during the adjacent panel excavation.