随机扰动下深部采场煤岩结构时变模型及响应规律研究

项目名称： 随机扰动下深部采场煤岩结构时变模型及响应规律研究

项目编号： No.51474120

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 矿业工程

项目作者： 苏荣华

作者单位： 辽宁工程技术大学

项目金额： 85万元

中文摘要： 深部采场煤岩动力灾害发生具有显著时效性和强随机性，本质上是采场煤岩时变结构在随机扰动下响应所致。项目考虑深部采场高地应力条件，采掘扰动为随机扰动、采场煤岩结构为时变体，依据岩石力学、随机动力学、时变力学等基本理论，采用理论分析、实验研究、数值模拟、现场应用和综合分析相结合研究方法，分析采场随机扰动作用模式；研制三轴随机扰动加载装置，设计随机静力扰动、动力扰动、复合扰动下煤岩结构力学参数测试分析系统；揭示不同类型煤岩试件、层合煤岩试件在随机扰动下结构静动态响应机理，建立随机扰动下深部煤岩结构时变模型；提出随机时变模型数值求解方法，对实际深部采场煤岩时变结构在随机扰动下静动态响应规律进行数值模拟；获得随机扰动下深部采场煤岩结构响应时空演变统计规律，为深部开采煤岩动力灾害发生机理及预测防治研究提供理论基础。

中文关键词： 随机扰动；深部采场；煤岩结构；时变模型；响应规律

英文摘要： Coal and rock dynamic disasters occurring in deep stope have dramatically time-dependent properties and strong randomness. The underlying cause is the response of time-varying coal-rock structure under action of random perturbations. Considering that deep stope under high geostress, mining disturbance is stochastic and coal-rock mass is time-varying. According to the basic theory of rock mechanics, stochastic dynamics, time-varying mechanics, the method combining theoretical analysis, experimental research, numerical simulation, field application and comprehensive analysis is used. The action modes of random perturbations are analyzed. Three axial random disturbance loading device is developed. Under random static disturbance, dynamic disturbance and its complex ways, mechanics parameters test and analytic system is designed for coal-rock structure. The static and dynamic response mechanism under random perturbations is revealed for different types of coal-rock specimens and laminated coal-rock specimens. The time-varying model of deep coal-rock structure is built under random disturbances. The numerical solution method of random time-varying model is proposed. To the actual deep stope coal-rock time-varying structure, the static and dynamic response rules are numerically simulated under random disturbances. The response statistical regularity of temporal and spatial evolution is obtained for deep mining coal-rock structure under stochastic disturbances. The above provides the theoretical basis for the research on the mechanism, prediction and prevention of deep mining coal and rock dynamic disasters.

英文关键词： random disturbance;deep stope;coal-rock structure;time-varying model;response rule