采矿与安全工程学报2012，Vol.29Issue(3)：334-338,5.
动载扰动诱发底板冲击矿压演化规律研究
Analysis on Evolution Laws of Floor Burst Induced by Dynamic Disturbance
摘要
Abstract
To research the evolution laws of floor burst under dynamic loads, theory analysis and nu-merical simulation methods were used in this paper, to study the response characteristics of stress, dis-placement, et al, of roadway bottom coal under dynamic disturbance, and to reveal the causing reason and burst process induced by dynamic stress. The results show that the buckling failure and deformation will happen in the bottom coal seam, when the superposition of dynamic stress and high horizontal stress in floor reaches or surpasses the strength limit. In addition, the tensile stress, which is formed by the reflection of incident stress wave at the floor surface, causes spallation damage in the floor, and with the gradual enlargement of the damage range, the floor burst will be induced. Under the dynamic load-. ing, the horizontal stress, vertical stress and stress difference firstly increase in a small extent, and then decrease substantially. At the same time, the scope of tensile failure zone and the vertical displacement increase subsequently. During the process, the concentration of horizontal stress in floor disappears gradually.关键词
动载扰动/底板冲击/演化规律/数值模拟Key words
dynamic disturbance/ floor burst/ evolution law/ numerical simulation分类
矿业与冶金引用本文复制引用
徐学锋,窦林名,刘军,张银亮,张国华,王士超..动载扰动诱发底板冲击矿压演化规律研究[J].采矿与安全工程学报,2012,29(3):334-338,5.基金项目
国家重点基础研究发展计划(973)项目(2010CB226805) （973）
国家自然科学基金项目(51104055,51074155) （51104055,51074155）
河南省教育厅自然科学研究计划项目(2010A440003) （2010A440003）
河南理工大学青年基金重点项目(Q2011-42A) （Q2011-42A）
