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1Subsidence control method by inversely-inclined slicing and upward mining for ultra-thick steep seams显示文摘Ultra-thick steep coal seam mining will inevitably lead to the increase of greater and violent ground subsidence and deformation.A subsidence control method by inversely-inclined slicing and upward mining is proposed in this paper.By this method,the sequence of collapse of overlying strata and the direction of propagation of strata movement are changed,the extent of roof-side deformation thereby is lessened,and boundary angle of roof-side subsidence is reduced by 5°-10°.The mechanism of this mining method for control of strata movement has been evidenced by numerical simulation and experiments with similarity materials.A subsidence prediction model based on the variation of mining influence propagation angle can be used to evaluate the surface movement and deformation of the mining method.The application of the method in No.3 Mine in Yaojie mining area has yielded the expected result.Huayang Dai Peng Li Nurpeissova Marzhan Yueguan Yan Chongliang Yuan Tursbekov Serik Junting Guo Yryszhan Zhakypbek Konbay Seituly 2022International Journal of Mining Science and Technology2022,32,1:4
2基于云模型的煤矿采动对地表建筑物损害评价显示文摘针对煤矿地下开采带来的地表移动变形和建筑物损害的问题,基于云理论采用Ex、En和He3个数字特征构建采动损害评价云模型对采动影响下地表建筑物损害等级进行科学分析,并以彭庄煤矿为例从倾斜变形、曲率变形和水平变形3个指标对其地表建筑物损害程度有效评价。根据评价云图表明:彭庄煤矿采空区上方建筑物倾斜变形、曲率变形和水平变形3个指标评价云滴均落在等级Ⅰ范围内,即建筑物受到轻微损害,该评价结果与实际情况相互验证,表明了云模型在煤矿采动对地表建筑物损害等级评价中的合理性;与传统评价方法相比云模型具有可视性强、量化等级直观描述等优点,可广泛应用在采动影响下地表损害的科学评价。邱清辉 黄海隆 2021煤炭技术2021,40,12:1
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