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不同采深煤(岩)体岩爆过程模拟分析
引用本文: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.
作者姓名:崔铁军  李莎莎  王来贵  马云东
作者单位:1. 辽宁工程技术大学 安全科学与工程学院,阜新 123000;矿山热动力灾害与防治教育部重点实验室,阜新 123000;大连交通大学 辽宁省隧道与地下结构工程技术研究中心,大连 116028;2. 辽宁工程技术大学 安全科学与工程学院,阜新 123000;矿山热动力灾害与防治教育部重点实验室,阜新 123000;3. 辽宁工程技术大学 力学与工程学院,阜新,123000;4. 大连交通大学 辽宁省隧道与地下结构工程技术研究中心,大连,116028
基金项目:国家自然科学基金(51274110,51474121);国家自然基金煤炭联合基金重点项目(U1361211)资助项目
摘    要:为了研究不同采深条件下诱发的岩体变形、岩爆、凸出和塌落特征,对采深120m~820m,间隔100m的8种工况开采后岩体破坏进行模拟。结合能量守恒理论和ΔU=Ue-U0来确定岩爆后由弹性势能转化为动能的ΔU。使用三维岩体爆破颗粒流模型将ΔU按照一定规则转化为岩爆飞石动能。模拟了各工况下开采后岩体变化情况,结果表明,采深为120m,220m和320m三种工况下不发生岩爆;420m开始发生岩爆;520m和620m在发生岩爆的同时也伴随开采面岩体凸出;720m和820m时具有岩爆、凸出和塌落现象。同时总结了岩爆特点,特别是提出岩爆是岩体系统为了保持自身能量平衡而向系统之外释放能量的过程。

关 键 词:矿业安全  岩爆  不同采深  能量理论  颗粒流(PFC)
收稿时间:2016/5/13 0:00:00
修稿时间:2016/11/30 0:00:00

Simulation analysis of the process of rock burst in coal (rock) in different depths
CUI Tie-jun,LI Sha-sh,WANG Lai-gui,MA Yun-dong.Simulation analysis of the process of rock burst in coal (rock) in different depths[J].Chinese Journal of Computational Mechanics,2017,34(3):336-343.
Authors:CUI Tie-jun  LI Sha-sh  WANG Lai-gui  MA Yun-dong
Institution:School of Safety Science and Engineering, Liaoning Technical University, Fuxin 123000 China;Key Laboratory of Mine Thermodynamic Disasters and Control of Ministry of Education, Fuxin 123000, China;Tunnel & Underground Structure Engineering Center of Liaoning, Dalian Jiaotong University, Dalian 116028 China,School of Safety Science and Engineering, Liaoning Technical University, Fuxin 123000 China;Key Laboratory of Mine Thermodynamic Disasters and Control of Ministry of Education, Fuxin 123000, China,School of Mechanics and Engineering, Liaoning Technical University, Fuxin 123000, China and Tunnel & Underground Structure Engineering Center of Liaoning, Dalian Jiaotong University, Dalian 116028 China
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.
Keywords:mining safety  rock burst  different depth  energy principle  PFC
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