Width optimization of narrow coal pillar of roadway driving along goaf in fully mechanized top coal caving face

被引：0
|
作者：
Qi F. [1 ,2 ]
Zhou Y. [3 ]
Cao Z. [3 ]
Zhang Q. [3 ]
Li N. [1 ]
机构：
[1] School of Mines, China University of Mining & Technology, Xuzhou, 221116, Jiangsu
[2] Shandong Energy Zaozhuang Mining Group Xin'an Coal Co Ltd, Zaozhuang, 277000, Shandong
[3] State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining & Technology, Xuzhou, 221116, Jiangsu
来源：
Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering | 2016年 / 33卷 / 03期
关键词：
Limit equilibrium theory; Narrow coal pillar; Roadway driving along goaf; Surrounding rock stability;
D O I：
10.13545/j.cnki.jmse.2016.03.015
中图分类号：
学科分类号：
摘要：
The width of the narrow coal pillar of roadway driving along goaf is the key factor affecting the surrounding stability of the mining roadway in fully mechanized top coal caving face. Based on the abutment pressure distribution characteristics and the ultimate balanced theory, the reasonable width of narrow coal pillar should be chosen between 4.1m and 7.2 m, combined with the engineering condition in workface 3309 of a mine in Shandong. In order to optimize the width of the narrow coal pillar, the effect of plastic area distributions and stress distribution characteristics of the two sides of coal pillar under conditions of different width of narrow coal pillar have been studied by numerical analysis. The optimal width of coal pillar is 5 m. The validity of the optimal coal pillar width was verified by the engineering practice in workface 3309. Field monitoring has indicated that the surrounding rock deformation of the mining roadway could meet the requirements of safety production. © 2016, Editorial Board of Journal of Mining & Safety Engineering. All right reserved.
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页码：475 / 480
页数：5
相关论文
共 14 条
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