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《Chinese Journal of Underground Space and Engineering》 2013-S1
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Effects of the Stress Characteristics of Gateway on the Coal Seam Dip Angle and the Support Parameter Optimization

Zhang Xiangyang;Yang Ke;School of Energy and Safety Engineering,Anhui University of Science and Technology;Key Laboratory of Coal Mine Safety and Efficiently Caving,Ministry of Education, Anhui University of Science and Technology;  
In order to research the affection of the changes of the coal seam pitch to the stress characteristics of gateway surrounding rock,according to the geological and technical conditions of Huainan mining area steeply dipping seam,the mechanical model of inclined seam was established,it also analysed the stress and deformation characteristics of the gateway surrounding rock. The results show that: with the increase of seam dip angle,the amount of vertical subsidence of the roof gradually reduced,the stability of the high-side and low-side coal reduced gradually,the deformation of the high-side and low-side coal has a basic linear relationship with the surrounding rock pressure.The influence of surrounding rock pressure on high-side deformation was greater than that on low-side. According to the mechanical and deformation characteristics of surrounding rock,the reasonable asymmetric anchor net supporting parameters and control countermeasures were put forward,and into engineering practice,after the gateway was excavated 5-7 days,the prestressed anchorage cable for high-side in the gateway was set up,it could have very good effect to control the asymmetric deformation of surrounding rock and achieve a good technical economic effect.
【Fund】: 国家重点基础研究发展计划(973)项目(2010CB226806);; 安徽省高等学校优秀青年人才基金资助项目(2010SQRL044ZD);; 安徽省高等学校省级自然科学研究资助项目(KJ2013A098)
【CateGory Index】: TD353
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