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《Coal Science and Technology》 2011-02
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Study on Water Conservation Mining with Aeolian Sand Paste Backfill in Coal Mine at Desert Border

CUI Feng,ZHANG Hua-xing,LIU Peng-liang,GUO Ai-guo(Coal Mining and Designing Department,Tiandi Science and Technology Company Ltd.,Beijing 100013,China)  
In order to have a water conservation mining under the weak ecological environment at the south border of Mu Us Desert,the paper analyzed the coal pillar stability in the mines with the rib pillar mining method and the room and pillar mining method.The safety coefficient of the coal pillars was 1.12 and 0.89 individually and a long stability of the coal pillar could not be ensured.Based on the deposit conditions of Yangyu Mine at the border of the desert,a rib pillar backfill mining method was provided.The backfill material was the paste material with about 60% to 75% of the aeolian sand,the 28 days uniaxial compressive strength would be 8 ~ 10 MPa and could meet the requirements of the backfill mining.The results showed that with the rib pillar mining with the aeolian sand backfill,the actual mining rate of the coal mining face in a mine could be improved from 44% to over 85%,the mine service life could be expanded of 8~9 years.The rib pillar mining with aeolian sand backfilling could be effective to control the displacement and deformation of the overburden strata and to protect the integrality of the aquifer in the Quaternary System
【Fund】: 天地科技股份有限公司科技创新基金资助项目(TZ-GY-2010-KC-8)
【CateGory Index】: TD823.7
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