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《Coal Science and Technology》 2014-07
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Study on Stability of Roof-Coal Pillar in Room and Pillar Mining Goaf in Shallow Depth Seam

XIE Xing-zhi;Department of Mining and Design,Tiandi Science and Technology Company Limited;State Key Lab of Coal Mining and Clean Utilization(China Coal Research Institute);  
In order to reduce roof disaster dangers caused by the coal pillar stability lost in the room and pillar mining goaf,a numerical model of large area roof falling caused by the coal pillar stability lost in the room and pillar mining goaf was established and was applied to the analysis on the loading features of the coal pillars in the room and pillar mining goaf. A dimension relationship of the coal pillar in the room and pillar mining goaf affected to the stability of the completed mining goaf was obtained. Based on the relationship between the pillar stress and strength in the room and pillar mining goaf,a numerical analysis model of the roof-coal pillar group system was established in the room and pillar mining goaf in a shallow depth seam. A numerical simulation method was applied to the iterative calculation on the stability of the roof-coal pillar group system in the room and pillar mining goaf in Kuiwu Mine of Ordos Area. A prediction could be conducted on the stability and failure development process of the room and pillar mining goaf in the mine,and a theoretical support could be provided to the evaluation on the stability of the roof-coal pillar group system in the room and pillar mining goaf in a shallow depth seam.Meanwhile under the rheology condition,a coal pillar group stability lost process to cause large area roof disaster could be reappeared.
【Fund】: 国家自然科学基金青年基金资助项目(51304115);; “十二五”国家科技支撑计划资助项目(2012BAK04B08)
【CateGory Index】: TD327
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