Gateside packwall design in solid backfill mining - A case study

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• 作者：Haiqiang Jiang ; ^{hqjiang2007@126.com" class="auth_mail" title="E-mail the corresponding author} ; Xiexing Miao ; Jixiong Zhang ; Shiwei Liu
• 关键词：Packwall design ; Solid backfill mining ; Roof convergence ; Winkler foundation and beam model ; Numerical simulation
• 刊名：International Journal of Mining Science and Technology
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：26
• 期：2
• 页码：261-265
• 全文大小：946 K

文摘

Based upon characteristic movement features of the overlying strata in solid backfill mining and in-situ observations, an associated model representing a roadway support system has been developed. Based on the Winkler foundation and beam model, the current study presents a static analysis of the model, thus permitting acquisition of a theoretical formula pertaining to roof convergence. Through use of working face 6304-1 (Jisan Colliery) as the research setting, the association between roof convergence magnitude and both packwall strength and width have been elucidated. Based upon observed conditions at the working face, realistic packwall parameters have been formulated, with numerical simulation results and field application results indicating that design parameters garnered from the developed formula successfully adapted to local geological movement and deformation. Accordingly, roadway deformation was shown to be within the permissible range, thus satisfying mine production requirements. The proposed method in the current study may give a design basis for pack design in the context of SBM under similar conditions.