安徽理工大学学报(自然科学版)
安徽理工大學學報(自然科學版)
안휘리공대학학보(자연과학판)
JOURNAL OF ANHUI UNIVERSITY OF SCIENCE AND TECHNOLOGY(NATURAL SCIENCE)
2013年
2期
56-61
,共6页
回采巷道%顶板运动%上提面
迴採巷道%頂闆運動%上提麵
회채항도%정판운동%상제면
roadway%fundamental roof movement%longwall with increased upper mining limit
提高回采上限工作面(上提面)的回采巷道由于受到底部蹬空采动影响,矿压显现较浅部其他回采巷道更加剧烈,为安全生产需研究其老顶运动特征。通过悬臂梁理论计算拟合远距离上覆工作面及回采巷道基本顶受下部蹬空回采影响在初始影响段的下沉挠度曲线;并通过数值模拟计算对比分析了理论计算结果及进一步计算分析了上覆工作面及回风巷的基本顶运动变形特征。结果表明:数值模拟计算曲线与理论拟合曲线较好吻合,结合工程实践,其计算过程能够很好地反映顶板运动变形特征。研究结果能为类似条件下回采巷道布置提供一定参考依据。
提高迴採上限工作麵(上提麵)的迴採巷道由于受到底部蹬空採動影響,礦壓顯現較淺部其他迴採巷道更加劇烈,為安全生產需研究其老頂運動特徵。通過懸臂樑理論計算擬閤遠距離上覆工作麵及迴採巷道基本頂受下部蹬空迴採影響在初始影響段的下沉撓度麯線;併通過數值模擬計算對比分析瞭理論計算結果及進一步計算分析瞭上覆工作麵及迴風巷的基本頂運動變形特徵。結果錶明:數值模擬計算麯線與理論擬閤麯線較好吻閤,結閤工程實踐,其計算過程能夠很好地反映頂闆運動變形特徵。研究結果能為類似條件下迴採巷道佈置提供一定參攷依據。
제고회채상한공작면(상제면)적회채항도유우수도저부등공채동영향,광압현현교천부기타회채항도경가극렬,위안전생산수연구기로정운동특정。통과현비량이론계산의합원거리상복공작면급회채항도기본정수하부등공회채영향재초시영향단적하침뇨도곡선;병통과수치모의계산대비분석료이론계산결과급진일보계산분석료상복공작면급회풍항적기본정운동변형특정。결과표명:수치모의계산곡선여이론의합곡선교호문합,결합공정실천,기계산과정능구흔호지반영정판운동변형특정。연구결과능위유사조건하회채항도포치제공일정삼고의거。
Due to upper mining limit of longwall is increased , roadway is affected by floor failure, which strata stress occurrence is more obvious than that in other shallow roadways .In order to assure safe mining the charac-teristics of roof movement are needed to study .By theoretical calculation of cantilever beam , subsidence deflec-tion curves of fundamental roof of the wall and roadway wich were influenced by lower seam mining , were fitted. Theoretical calculation results were compared with numerical simulation calculation results .Further more deform-ation characteristics of the wall and fundamental roof of return airway were calculated .The results showed that theoretical curve was well fitted with numerical simulation curve .Combining with engineering practice , the cal-culation results well reflect deformation characteristics of fundamental roof movement .The results provide a refer-ence to roadway layout under the similar conditions .