计算力学学报2017，Vol.34Issue(3)：336-343,8.DOI:10.7511/jslx201703011
不同采深煤(岩)体岩爆过程模拟分析
Simulation analysis of the process of rock burst in coal (rock) in different depths
摘要
Abstract
In order to study rock mass deformation,rock burst,bulge and collapsing characteristics in different depths caused by mining,eight kinds of working conditions of unloading rock mass are simulated,in which the mining depth is from 120 m to 820 m,at an interval of 100 m.Combined with the energy conservation principle and ΔU=Ue-U0 to determine the amount of elastic potential energy transformed into kinetic energy ΔU after rock burst.Using a three-dimensional particle flow model of rock blast,ΔU can be converted to kinetic energy of fly rocks according to certain rules.Simulation of the eight kinds of conditions after mining shows that:in three working conditions of 120 m,220 m and 320 m rock burst does not occur;In the condition of 420 m rock burst begins to occur;in the conditions of 520 m and 620 m,rock burst and bulge in mining face occur at the same time;in the conditions of 720 m and 820 m rock burst,bulge and falling all take place.This paper summarizes the characteristics of rock burst,and especially suggests that rock burst is the process of releasing energy outside the rock mass system in order to maintain its energy equilibrium.关键词
矿业安全/岩爆/不同采深/能量理论/颗粒流(PFC)Key words
mining safety/rock burst/different depth/energy principle/PFC分类
矿业与冶金引用本文复制引用
崔铁军,李莎莎,王来贵,马云东..不同采深煤(岩)体岩爆过程模拟分析[J].计算力学学报,2017,34(3):336-343,8.基金项目
国家自然科学基金(51274110,51474121) （51274110,51474121）
国家自然基金煤炭联合基金重点项目(U1361211)资助项目. （U1361211）
