【摘要】：煤巖體應(yīng)力是礦井支護設(shè)計、礦壓分析、沖擊地壓等煤巖動力災(zāi)害預(yù)測與防治的重要依據(jù)。為了定向測試煤巖體多向應(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)力動態(tài)監(jiān)測系統(tǒng)。感應(yīng)器上設(shè)置的感應(yīng)片可實現(xiàn)與煤巖體主動有效耦合,通過感應(yīng)片伸縮變形和油壓變化來反映煤巖體應(yīng)力大小,進而通過該監(jiān)測系統(tǒng)實現(xiàn)煤巖體應(yīng)力多向、實時連續(xù)測量。將該系統(tǒng)應(yīng)用于煤礦現(xiàn)場采動應(yīng)力監(jiān)測,分析了采場應(yīng)力分布及演化規(guī)律。監(jiān)測結(jié)果表明,多測點應(yīng)力測量可反映巷道圍巖應(yīng)力分布及隨采動等演化規(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。實測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;各測點應(yīng)力變化趨勢基本一致,同一測點3個方向正應(yīng)力并非完全同步;測試工作面巷旁存在2個應(yīng)力峰值區(qū)及2個卸壓帶。該系統(tǒng)為定向監(jiān)測煤巖體應(yīng)力提供了有效手段和方法,可用于礦山應(yīng)力監(jiān)測分析、圍巖穩(wěn)定性監(jiān)測分析、沖擊地壓等煤巖動力災(zāi)害監(jiān)測預(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】： 中國礦業(yè)大學(xué)煤礦瓦斯與火災(zāi)防治教育部重點實驗室;中國礦業(yè)大學(xué)煤炭資源與安全開采國家重點實驗室;中國礦業(yè)大學(xué)安全工程學(xué)院;陜西煤業(yè)化工集團有限責(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”國家重點研發(fā)計劃(2016YFC0801401) 國家自然科學(xué)基金資助項目(51574231) 中國礦業(yè)大學(xué)優(yōu)秀創(chuàng)新團隊(2014ZY001)~~
【分類號】：TD311

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9 O賜蜢，

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