工业广场压煤膏体充填开采不同充实率斜井井筒变形规律研究  

Study on deformation laws of inclined shaft with different filling rates during coal paste filling mining in industrial square

作　　者：卢江丰 张新国[1,2] 孙昱 焦方树 范亚奇 周以乐 LU Jiangfeng;ZHANG Xinguo;SUN Yu;JIAO Fangshu;FAN Yaqi;ZHOU Yile(School of Energy and Mining Engineering,Shandong University of Science and Technology,Qingdao 266590,China;Mine Disaster Prevention and Control-Ministry of State Key Laboratory Breeding Base,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]山东科技大学能源与矿业工程学院,山东青岛266590 [2]山东科技大学矿山灾害预防控制省部共建国家重点实验室培育基地,山东青岛266590

出　　处：《中国矿业》2025年第3期183-193,共11页China Mining Magazine

基　　金：山东省自然科学基金面上项目资助(编号:ZR2022ME199)。

摘　　要：为研究充填开采工广压煤后斜井井筒的变形规律,以岳城煤矿主斜井井筒为研究对象,建立了适用于膏体充填开采的等效采高模型,得出膏体充填开采下充实率是影响斜井井筒变形的关键因素;对四种不同充实率条件下斜井井筒变形进行数值模拟,揭示斜井井筒变形破坏规律;分析最大主应力、最小主应力及极限状态下斜井变形,获得井筒破坏瞬时临界充实率;利用沉陷预计获得斜井不同位置下沉值,通过计算获得斜井拉压变形值。研究结果表明:充填开采工广压煤时斜井井筒的应力及位移主要体现在竖向方向,在水平方向影响不大,斜井变形破坏最剧烈位置出现在高埋深即井筒下段,在此处应力及变形出现峰值;低充实率最大主应力和最小主应力主要出现在井筒底板,随充实率增大向底板与两帮交汇处转移,反演得出87.3%为临界充实率;通过沉陷预计得出压缩变形最大为1.51mm/m,拉伸变形最大为2.8mm/m,在允许范围之内;分析得到充填开采斜井井筒变形破坏的警戒区段,对类似膏体充填开采工广压煤时斜井井筒的保护提供了重要参考。In order to study the deformation laws of inclined shaft after filling mining,the main inclined shaft of Yuecheng Coal Mine is taken as the research object,and the equivalent mining height model suitable for paste filling mining is established.It is concluded that the filling rate under paste filling mining is the key factor affecting the deformation of inclined shaft.Numerical simulation of inclined shaft deformation under four different filling rates is carried out to reveal the deformation and failure laws of inclined shaft.By analyzing the maximum and minimum principal stresses and the deformation of the inclined shaft under ultimate conditions,the critical filling rate at the moment of shaft failure is inversely derived.Settlement predictions are used to estimate the settlement values at different positions of the inclined shaft,and the tensile and compressive deformation values of the shaft are calculated.The research results indicate that:the stress and displacement of the inclined shaft are mainly reflected in the vertical direction,and have little effect in the horizontal direction,and he most severe deformation and failure of the inclined shaft occur at the deep burial zone,specifically in the lower section of the shaft,where the stress and deformation reach their peak values.The maximum and minimum principal stresses with low filling rate mainly appear in the bottom plate of the wellbore,and transfer to the intersection of the bottom plate and the two sides with the increase of the filling rate.The inversion results show that 87.3% is the critical filling rate.Through the prediction of subsidence,the maximum compression deformation is 1.51 mm/m,and the maximum tensile deformation is 2.8 mm/m,which is within the allowable range.The warning section of deformation and failure of inclined shaft in filling mining is obtained,which provides an important reference for the protection of inclined shaft in similar paste filling mining.

关 键 词：工业广场 充实率 斜井井筒 变形规律 数值模拟 概率积分法 

分 类 号：TD325[矿业工程—矿井建设]