倾斜底板非对称底鼓灾变机理及灾变模式研究  

Study on disaster mechanism and disaster mode of asymmetric floor heave in inclined floor

作　　者：贾永杰 Jia Yongjie(School of Resource and Safety Engineering,Shanxi Engineering Vocational College Taiyuan 030009,China)

机构地区：[1]山西工程职业学院资源与安全工程系,山西太原030009

出　　处：《煤炭与化工》2024年第1期1-7,11,共8页Coal and Chemical Industry

摘　　要：深部高应力倾斜底板岩层易发生非对称底鼓灾害。采用有限元-离散元耦合数值方法(FDEM)研究倾斜底板非对称底鼓灾变机制、灾变模式,以及岩层倾角对底鼓模式的影响。结果表明:(1)应力驱动型底鼓灾变机制为碎胀性的渐进挤压大变形,环形切向集中应力是造成上述灾变的应力驱动源;(2)当倾角为15°~30°时,非对称底鼓特征明显;当倾角为45°~75°时,非对称特征减弱;当倾角为0或90°时,底板呈对称底鼓特性。Asymmetrical floor heave disaster is easy to occur in deep inclined floor with high in-situ stress.The combined finite-discrete element numerical method(FDEM)was used to study the mechanism and mode of asymmetric floor heave disaster in inclined floor strata,and the influence of dip angle was also investigated.The results showed that:①The stress-driven floor heave mechanism could be interpreted as the progressive fracture-swelling-squeezing deformation;annular tangential concentrated stress was the driving source;②When the dip angle wa 15°~30°,the asymmetric floor heave was obvious;when the dip angle was 45°~75°,the asymmetry feature ws weakened;however,when the inclination angle was 0°or 90°,the floor heave was symmetrical.

关 键 词：非对称底鼓 倾斜底板岩层 有限元-离散元耦合数值模拟 裂隙扩展 大变形 

分 类 号：TD327.3[矿业工程—矿井建设]