受载岩体变形、滑动过程中反馈特性研究

项目名称： 受载岩体变形、滑动过程中反馈特性研究

项目编号： No.51474121

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： 王来贵

作者单位： 辽宁工程技术大学

项目金额： 87万元

中文摘要： 采矿工程中众多动力灾害发生的实质是煤（岩）体在各种内外因素相互作用下发生正反馈效应。项目采用高速、高倍照相机，测定岩石试件表面的裂纹数量随加载变形过程的非线性增长关系，分别确定岩体试件单轴压缩、单轴压缩蠕变、对径压缩拉伸蠕变等过程中有效承载面积的变化规律；利用底摩擦实验测定滑动试件滑面的粗糙度、阻尼系数变化规律。利用系统动力学方法确立载荷与有效承载面积之比随变形变化的反馈环与反馈关系，分别建立单轴压缩与变形、压缩蠕变、对径压缩拉伸蠕变、剪切蠕变变形、软岩蠕变等变形与时间之间的加载系统正反馈发生条件与判据；确立滑动阻力、位移、滑动速度与时间之间的反馈环与反馈关系，建立滑动试件正反馈发生条件与判据。分别研究两个、三个及多个复杂岩体结构及压剪统一、岩体剪断后形成弧面、穿层滑面等复杂滑面滑动过程及对应的正、负反馈特性，为揭示矿山动力灾害发生机理，预测、预报、治理灾害发生提供理论基础。

中文关键词： 反馈；变形过程；蠕变；滑动过程

英文摘要： The nature occuring many dynamic disaster in mining engineering is the positive feedback effect occurrence of the coal and rock on the interaction of various internal and external factors. The project uses the high speed and high power camera and measures the number of the cracks on the surface of the rock sample with the nonlinear growth of the process of the load deformation. It determines the change law of effective bearing area of the rock sample on the process of the uniaxial compression, the uniaxial compression creep, the tensile creep of the diametral compression. Using the experiment of the bottom friction, it determines the change law of the surface roughness and the damping coefficient of the sliding sample. Using the theoretical method, it determines the feedback circle and the feedback relation of the ratio of load and the effective loaded area with change of deformation, builds occurrence conditions and criteria of the positive feedback of the load system between uniaxial compression deformation, the compression creep, the tensile creep of the diametral compression, shear creep deformation, the creep deformation of the soft rock and time and the sliding sample. It studies two, three or many complex rock structures and the sliding process of the complex sliding surface of the pressure and shear unified, forming cambered surface after the rock cutted, the wearing layer surface and corresponding the positive and negative feedback characteristic. The project can provide the theoretical basis for the occurrence mechanism, prediction and forecasting of the dynamical disaster of the mine.

英文关键词： feedback;dengformation process;creep;slipping process