摘要
建立了回采巷道底鼓力学模型,借助于MathCAD软件得到了底板应力应变解析解。由于煤岩为脆性材料,且参与底鼓的底板浅部岩层多为单向或两向受力状况,因此以最大线应变强度理论为煤岩破坏准则,分别研究了水平应力占主导作用和垂直应力占主导作用时底板岩层失稳破坏规律。针对底板岩层变形破坏规律,提出了相应的底鼓控制准则。
Gateroads mechanical model was established, afterwards the stress and strain solution were obtained by using MathCAD mathematical software. The maximum compressive and tensile strength criteria were applied to evaluate the failure condition of immediate floor due to their brittle characteristics. Then, the failure behavior of immediate floor was studied when horizontal stress is higher than vertical stress, vice versa. At last, the rational criteria for control of floor heave were proposed based on the study of the failure behavior of immediate floor.
出处
《煤炭技术》
CAS
北大核心
2014年第10期92-95,共4页
Coal Technology
基金
国家自然科学基金项目(51174195)
全国博士学位论文作者专项资金资助项目(200760)
煤炭资源与安全开采国家重点实验室自主研究课题资助(SKLCRSM08X04)
