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Settlement behavior of coal mine waste in different surrounding rock conditions

ISSN号：1671-2900
期刊名称：《采矿技术》
时间：0
分类：TD3[矿业工程—矿井建设]
作者机构：[1]School of Resources and Safety Engineering,Central South University,Changsha 410083,China, [2]Centre Coal Research Institute,Beijing 100013,China
相关基金：Foundation item： Project（50490274） supported by the National Natural Science Foundation of China; Project（06JJ4062） supported by the Hunan Provincial Natural Science Foundation, China

作者：马春德[1], 李夕兵[1], 胡炳南[2], 陈枫[1], 徐纪成[1], 李地元[1]

关键词：煤矿废物, 沉降特性, 周围岩石环境, 侧压, coal mine waste, settlement behavior, surrounding rock conditions, final settlement, lateral pressure

中文摘要：

为了调查在原处在多瘤的煤矿废物的解决行为上包围岩石的复杂条件的影响，使遭到了到高严肃压力，用有在实验的不同有弹性的 moduli 的不同类似的材料做的四种装载房间被用来模仿在里面地点岩石的变丑特征，包括软、中等坚硬，硬、额外难的岩石。结果显示出那所有解决轴的负担(或轴的紧张压力) 在四个不同包围岩石条件下面获得的曲线介绍力量指数的功能特征。在一样的轴的负担下面的煤矿废物的最后的解决是仔细，与多瘤有关，阶段和房间材料的变丑行为过去常模仿不同在原处包围的岩石的行为。在包围岩石状况的一样，在一样的最大的轴的负担下面的最后的解决与煤矿废物的更大的阶段的比例的减少减少。当时为一样的多瘤阶段盒子，有包围岩石和侧面的压力模仿的有弹性的模量的减少的解决增加随装载被用来模仿不同包围的房间的有弹性的模量的增加由轴的负担增加导致了岩石。测试结果也与阶段和装载房间材料的变丑特征有关仔细表明压缩曲线和侧面的压力曲线显示出每个阶段的三阶段的行为，和持续时间，它是，随煤矿废物和模仿的岩石材料的有弹性的模量的小尺寸的比例的增加减少。

英文摘要：

In order to investigate the influence of complex conditions of in-situ surrounding rocks on the settlement behavior of nubbly coal mine waste subjected to high gravity pressure,four kinds of loading chambers made of different similar materials with different elastic moduli in experiments were used to simulate the deformation features of in-site rocks,including soft,moderate hardness,hard and extra-hard rocks. The results show that all the settlement-axial load （or axial strain-stress） curves obtained under four different surrounding rock conditions present power-exponential function feature. The final settlement of coal mine waste under the same axial load is closely related to the lumpiness gradations and the deformation behavior of chamber materials used to simulate behaviors of different in-situ surrounding rocks. In the same surrounding rock condition,the final settlement under the same maximum axial load decreases with the decrease of the proportion of larger gradation of coal mine waste. While for the same lumpiness gradation case,the settlement increases with the decrease of elastic modulus of simulated surrounding rocks and the lateral pressure induced by axial load increases with the increase of elastic modulus of loading chambers that are used to simulate different surrounding rocks. The test results also reveal that both the compaction curve and lateral pressure curve show a three-stage behavior,and the duration of each stage,which is closely related to gradations and the deformation feature of loading chamber materials,decreases with the increase of the proportion of the small size of coal mine waste and elastic modulus of the simulated rock materials.

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