刀柱采空区上行开采应力分布规律数值模拟  

Numerical Simulation on Stress Distribution Law During Upward Mining in Wedge Pillar Mining Area

作　　者：杨创前 冯国瑞[1,2] YANG Chuangqian;FENG Guorui(College of Mining Technology,Taiyuon University of Tecunodogy,Taiyuan 030024,China;Research Center of Green Mining Engineering Technology in Shanxi Province,Taiyuan 030024,China)

机构地区：[1]太原理工大学矿业工程学院,山西太原030024 [2]山西省绿色采矿工程技术研究中心,山西太原030024

出　　处：《煤矿安全》2020年第5期56-60,共5页Safety in Coal Mines

基　　金：国家自然科学基金联合基金重点资助项目(U1710258);国家自然科学基金面上资助项目(51574172);山西省中青年拔尖创新人才资助项目(2015-02)。

摘　　要：针对大同矿区刀柱采空区安全上行开采问题,运用UDEC数值模拟软件研究了刀柱采空区形成时和上行长壁开采过程中采场应力分布特征以及刀柱煤柱的塑性区分布规律。研究表明:下煤层刀柱开采引起刀柱煤柱应力集中;上行开采引起刀柱煤柱应力分布的进一步演化,根据各刀柱煤柱受采动应力的影响将其分为应力降低区、应力升高区和应力稳定区;主关键层初次破断时,超前位于上行工作面下方的刀柱煤柱应力峰值及塑性区分布范围达到最大。晋华宫矿刀柱采空区上行开采底板位移观测情况验证了研究成果的可靠性。Aiming at the problem of safe upward mining of the wedge pillar mining area in Datong Mining Area,the stress distribution and plastic zone of the coal pillar before and during the upward mining were analyzed with UDEC numerical simulation software.The results showed that:stress concentration of wedge pillar is induced by mining in lower coal seam.The further evolution of the stress distribution of the coal pillars was caused by upward mining.According to the influence of the mine-induced stress of each coal pillar,it’s divided into the stress reduction zone,the stress rise zone and the stress stability zone.The maximum values of the stress peak and plastic zone distribution range in the ahead mining-induced pillar were obtained as soon as the initial breaking of the main key stratum.The observation of bottom displacement in the residual pillar mining area of Jinhuagong Mine verified the reliability of the research results in this paper.

关 键 词：刀柱采空区 上行开采 应力分布 塑性区分布 主关键层 

分 类 号：TD323[矿业工程—矿井建设]