本文選題：沖擊地壓 + 斷層��； 參考：《采礦與安全工程學(xué)報》2017年02期

【摘要】：煤炭開采中的沖擊地壓與斷層構(gòu)造密切相關(guān),而工作面分別沿斷層上盤和下盤推進時具有不同的沖擊危險。為研究工作面推進方式與斷層活動的相關(guān)性,以某過正斷層工作面為例,通過數(shù)值計算分析不同推進方式下斷層兩盤接觸應(yīng)力狀態(tài)的演化過程,基于對推進過程關(guān)鍵層破斷規(guī)律的分析,研究斷層應(yīng)力演化差異性產(chǎn)生的原因,并通過工作面實際回采過程的微震監(jiān)測數(shù)據(jù),驗證了采動影響下斷層活化規(guī)律。研究發(fā)現(xiàn):上盤開采時的斷層應(yīng)力變化幅度大于下盤開采時的應(yīng)力變化幅度,上盤開采時斷層圍巖系統(tǒng)應(yīng)力傳遞能力優(yōu)于下盤開采;推進方式會影響上覆巖層破斷后的覆巖結(jié)構(gòu)和應(yīng)力傳遞,上盤開采時關(guān)鍵層破斷后更易形成砌體梁結(jié)構(gòu),且結(jié)構(gòu)體系的穩(wěn)定性高于下盤開采,下盤開采時工作面沖擊危險性更高,須根據(jù)斷層性質(zhì)做好工作面布置和開采優(yōu)化,進而降低沖擊地壓危險。
[Abstract]:The percussive ground pressure in coal mining is closely related to the fault structure, and there are different impact hazards when the face is pushed along the upper and lower face of the fault respectively. In order to study the correlation between the driving mode of the working face and the fault activity, the evolution process of the contact stress state of the two plates of the fault under different propelling modes is analyzed by numerical calculation with a certain normal fault face as an example. Based on the analysis of fracture rules of key strata during the propulsion process, the causes of the difference of fault stress evolution are studied, and the law of fault activation under the influence of mining movement is verified by the microseismic monitoring data of the actual mining process. It is found that the variation range of fault stress in the upper face mining is larger than that in the lower face mining, and the stress transfer capacity of the fault surrounding rock system in the upper face mining is better than that in the lower face mining. The propelling mode will affect the overburden structure and stress transfer after the overlying strata break, and the masonry beam structure will be formed more easily after the key strata break in the upper face mining, and the stability of the structure system is higher than that of the downboard mining. The working face impact risk is higher when mining in the footwall, so the working face layout and mining optimization should be done according to the fault character, and then the risk of rock burst should be reduced.
【作者單位】： 北京科技大學(xué)土木與資源工程學(xué)院;中國礦業(yè)大學(xué)煤炭資源與安全開采國家重點實驗室;
【基金】：國家重點研發(fā)計劃項目(2016YFC0801403) 國家自然科學(xué)基金項目(51504015) 中國礦業(yè)大學(xué)煤炭資源與安全開采國家重點實驗室開放基金項目(SKLCRSM15KFB02) 中央高校基本科研業(yè)務(wù)費項目(FRF-TP-15-054A1)
【分類號】：TD322

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