采动巷道矿压显现及其支护参数优化研究  

Study on Strata Behaviors and Support Parameter Optimization of Mining Roadway

作　　者：李臣 辛德林[1] 乔博阳 LI Chen;XIN Delin;QIAO Boyang(CCTEG Wuhan Engineering Company&Research Institute Co.,Ltd.,Wuhan 430064,China;School of Energy and Mining Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China;School of Mechatronical Engineering,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]中煤科工集团武汉设计研究院有限公司,武汉430064 [2]中国矿业大学(北京)能源与矿业学院,北京100083 [3]北京理工大学机电学院,北京100081

出　　处：《煤炭技术》2023年第6期52-56,共5页Coal Technology

基　　金：中国博士后科学基金会面上资助(2021M700427)。

摘　　要：针对大采高工作面留巷支护参数过剩的问题,采用多种监测手段研究了采动影响下围岩变形破坏规律,并结合FLAC3D数值模拟软件对不同方案进行了理论适用性验证。研究结果表明:二次采动超前70 m以上窥视孔围岩变形破坏小,随着距离工作面的缩小最大破坏深度仅1.8 m左右,帮部围岩松动圈约为1.6 m,支护体轴力监测显示最大受力在超前30~50 m,但其受力远小于极限强度,原支护存在优化空间,将支护参数优化近50%时2种支护方案的围岩变形破坏量和塑性区差距有限,优化参数可实现安全开采、降本增效。Aiming at the problem of excess supporting parameters of roadway retaining in large mining height working face,deformation and failure laws of surrounding rock influenced by mining were studied by using various monitoring methods.FLAC'D numerical simulation software was used to verify the theoretical applicability of different schemes.The results show that the deformation and damage of the surrounding rock of the peephole more than 70 m ahead of the secondary mining is small.As the distance from the working face shrinks,the maximum damage depth is only about 1.8 m.The loosening zone of wall rock is about 1.6 m.The axial force monitoring shows that the maximum force of the supporting body is between 30 and 50 m ahead,but its force is far less than the ultimate strength.There is room for optimization in the original support.When the support parameters are optimized by nearly 50%,the difference between the deformation and failure of surrounding rock and the plastic zone is limited.Optimizing parameters can realize safe mining,cost reduction and efficiency increase.

关 键 词：超前支护 矿压监测 数值模拟 参数优化 

分 类 号：TD322[矿业工程—矿井建设] TD353