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| Simulation analysis of the process of rock burst in coal (rock) in different depths |
| Received:May 13, 2016 Revised:November 30, 2016 |
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| DOI：10.7511/jslx201703011 |
| KeyWord:mining safety rock burst different depth energy principle PFC |
| Author | Institution |
| 崔铁军 |
辽宁工程技术大学 安全科学与工程学院, 阜新 ;矿山热动力灾害与防治教育部重点实验室, 阜新 ;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 |
| 李莎莎 |
辽宁工程技术大学 安全科学与工程学院, 阜新 ;矿山热动力灾害与防治教育部重点实验室, 阜新 |
| 王来贵 |
辽宁工程技术大学 力学与工程学院, 阜新 |
| 马云东 |
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 |
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| 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. |
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