综放沿空煤巷不同支护方式围岩变形演化规律的数值模拟  

Numerical simulation on deformation evolvement of goaf-side entry with different roof supports at fully-mechanized top-coal caving face

作　　者：靖洪文[1] 王猛[2] 汪小东[1] 张春宇[1] 

机构地区：[1]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221008 [2]辽宁工程技术大学资源与环境工程学院,辽宁阜新123000

出　　处：《辽宁工程技术大学学报（自然科学版）》2009年第6期869-872,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金项目资助(50674083;50490273);教育部科学技术重点项目资助(106085);"十一五"国家科技支撑计划(2008BAB36B07)

摘　　要：针对综放开采沿空掘巷围岩控制的问题,采用数值模拟方法,以山西兰花集团公司大阳煤矿3203综放回风顺槽为研究对象,利用FLAC3D计算程序系统模拟了留设5m煤柱护巷时回采巷道围岩和小煤柱应力演化过程,对无支护、有支护情况下的巷道顶、底板及两帮的应力分布特征,巷道围岩位移特征和沿空煤巷围岩破坏区演化规律进行了对比分析。结果表明,锚杆(索)支护形式能有效控制围岩变形破坏,并且施加锚杆(索)支护后围岩松动范围能有效控制在锚杆(索)锚固范围之内,为保证综放沿空煤巷的稳定提供了理论与技术依据。In order to investigate the roof control at the goaf-side entry of a full-mechanized top-coal caving face,a study at the tailgate of 3203 face with fully-mechanized top-coal caving operation is conducted.The stress evolvement process of surrounding rock and small pillars at tailgate with a 5m coal pillar is simulated with FLAC3D calculation program.Under the conditions of without roof support and with roof support,the stress distribution characteristics of roof,floor and rib are analyzed.The displacement characteristics of tailgate and the failure evolvement of goaf-side entry are also compared.The analysis results show that the deformation of surrounding rock is controlled efficiently by rockbolt （or cable）,and the loose range of surrounding rock after support is controlled and limited within the anchor range.The study provides a theoretical and practical basis for stabilization of goaf-side entry at a fully-mechanized top-coal caving operation.

关 键 词：围岩变形:综放 沿空煤巷 应力演化 数值模拟 

分 类 号：TD353[矿业工程—矿井建设]