Top-coal deformation control of gob-side entry with narrow pillars and its application for fully mechanized mining face

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• 作者：Fangkun Qi^a ; ^c ; Yuejin Zhou^b ; ^{yuejinzh@163.com" class="auth_mail" title="E-mail the corresponding author} ; Jiawei Li^b ; Erqian Wang^b ; Zhengzheng Cao^b ; Ning Li^b
• 关键词：Fully mechanized top-coal caving ; Narrow pillar ; Gob-side entry ; Top coal ; Deformation control
• 刊名：International Journal of Mining Science and Technology
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：26
• 期：3
• 页码：417-422
• 全文大小：892 K

文摘

A mechanical model to control the top-coal deformation is established in accordance with the structural characters of the gob-side entry surrounding rock for the fully-mechanic top-coal caving; the analytical solution of top coal roof-sag curve is deduced with Winkler elastic foundation beam model. By means of a calculating and analytic program, the top coal roof-sag values are calculated under the conditions of different supporting intensities, widths of narrow pillars and stiffness of top coal; meanwhile, the relationship between the roof-sag values and supporting intensity, width of narrow pillars and stiffness of top coal is analyzed as well. With the actual situation of the gob-side entry taken into consideration, the parameters of top-coal control are determined and a supporting plan is proposed for the top-coal control, which is proved to be reliable and effective by on-site verification. Some theoretical guidance and advice are put forward for the top-coal deformation control in gob-side entry for fully mechanized top-coal caving face.