【摘要】：煤巖體應(yīng)力是礦井支護(hù)設(shè)計(jì)、礦壓分析、沖擊地壓等煤巖動(dòng)力災(zāi)害預(yù)測(cè)與防治的重要依據(jù)。為了定向測(cè)試煤巖體多向應(yīng)力及其演化規(guī)律,自主研發(fā)了三向缸體壓力感應(yīng)器和煤巖體應(yīng)力動(dòng)態(tài)監(jiān)測(cè)系統(tǒng)。感應(yīng)器上設(shè)置的感應(yīng)片可實(shí)現(xiàn)與煤巖體主動(dòng)有效耦合,通過(guò)感應(yīng)片伸縮變形和油壓變化來(lái)反映煤巖體應(yīng)力大小,進(jìn)而通過(guò)該監(jiān)測(cè)系統(tǒng)實(shí)現(xiàn)煤巖體應(yīng)力多向、實(shí)時(shí)連續(xù)測(cè)量。將該系統(tǒng)應(yīng)用于煤礦現(xiàn)場(chǎng)采動(dòng)應(yīng)力監(jiān)測(cè),分析了采場(chǎng)應(yīng)力分布及演化規(guī)律。監(jiān)測(cè)結(jié)果表明,多測(cè)點(diǎn)應(yīng)力測(cè)量可反映巷道圍巖應(yīng)力分布及隨采動(dòng)等演化規(guī)律,可以確定巷道圍巖卸壓帶范圍、應(yīng)力集中范圍及應(yīng)力集中程度等。實(shí)測(cè)分析得到了工作面巷道內(nèi)幫煤體的三向正應(yīng)力分布規(guī)律;各測(cè)點(diǎn)應(yīng)力變化趨勢(shì)基本一致,同一測(cè)點(diǎn)3個(gè)方向正應(yīng)力并非完全同步;測(cè)試工作面巷旁存在2個(gè)應(yīng)力峰值區(qū)及2個(gè)卸壓帶。該系統(tǒng)為定向監(jiān)測(cè)煤巖體應(yīng)力提供了有效手段和方法,可用于礦山應(yīng)力監(jiān)測(cè)分析、圍巖穩(wěn)定性監(jiān)測(cè)分析、沖擊地壓等煤巖動(dòng)力災(zāi)害監(jiān)測(cè)預(yù)警等。
[Abstract]:The stress of coal and rock mass is an important basis for the prediction and prevention of coal and rock dynamic disasters such as mine support design, rock pressure analysis and impact ground pressure. In order to test the multidirectional stress and its evolution law of coal and rock mass, a three direction cylinder pressure sensor and a dynamic monitoring system of coal and rock mass stress are developed. The inductor set on the inductor can be effectively coupled with the active coupling of coal and rock mass. The stress of coal and rock mass can be reflected by the expansion deformation and oil pressure change of the inductor, and then the multi-directional and real-time continuous measurement of the stress of coal and rock mass can be realized by the monitoring system. The system is applied to the monitoring of mining stress in coal mine, and the stress distribution and evolution law of stope are analyzed. The monitoring results show that the multi-point stress measurement can reflect the evolution law of surrounding rock stress distribution and with mining, and can determine the range of pressure relief zone, the range of stress concentration and the degree of stress concentration of roadway surrounding rock. The three direction normal stress distribution law of coal seam in the roadway of working face is obtained, the stress change trend of each measuring point is basically the same, and the normal stress in three directions of the same measuring point is not completely synchronous. There are two peak stress areas and two relief zones beside roadway of test face. The system provides an effective means and method for directional monitoring of coal and rock mass stress, and can be used for monitoring and analysis of stress in mines, monitoring and analysis of stability of surrounding rock, monitoring and warning of coal and rock dynamic disasters such as rock burst and so on.
【作者單位】： 中國(guó)礦業(yè)大學(xué)煤礦瓦斯與火災(zāi)防治教育部重點(diǎn)實(shí)驗(yàn)室;中國(guó)礦業(yè)大學(xué)煤炭資源與安全開采國(guó)家重點(diǎn)實(shí)驗(yàn)室;中國(guó)礦業(yè)大學(xué)安全工程學(xué)院;陜西煤業(yè)化工集團(tuán)有限責(zé)任公司安全技術(shù)研究中心;北京科技大學(xué)土木與資源工程學(xué)院;
【基金】：“十三五”國(guó)家重點(diǎn)研發(fā)計(jì)劃(2016YFC0801401) 國(guó)家自然科學(xué)基金資助項(xiàng)目(51574231) 中國(guó)礦業(yè)大學(xué)優(yōu)秀創(chuàng)新團(tuán)隊(duì)(2014ZY001)~~
【分類號(hào)】：TD311

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