本文關(guān)鍵詞： 聲發(fā)射 地應(yīng)力 Kaiser效應(yīng) 抹錄不凈現(xiàn)象　出處：《礦冶工程》2017年02期 　論文類型：期刊論文

【摘要】：為解決AE法測量地應(yīng)力時存在的測試精度低、可靠性差、Kaiser效應(yīng)點(diǎn)不易判別的問題,采用先進(jìn)的MTS 815材料試驗機(jī)作為加載設(shè)備、PCI-2聲發(fā)射儀作為聲發(fā)射信號采集設(shè)備,并通過外參數(shù)引入技術(shù)改造,實現(xiàn)了加載設(shè)備和聲發(fā)射儀二者數(shù)據(jù)采集的實時同步化,解決了聲發(fā)射信號特征點(diǎn)與應(yīng)力值間準(zhǔn)確對應(yīng)關(guān)系問題,提高了測試的準(zhǔn)確性和精度。在此基礎(chǔ)上,分析研究了分級多次循環(huán)加載方式下巖石試件聲發(fā)射信號激發(fā)特征與規(guī)律,找到了準(zhǔn)確獲取地應(yīng)力特征點(diǎn)的方法和波形處理技術(shù),大大提高了測試的可靠性。利用該系統(tǒng)對甘肅白銀集團(tuán)小廠壩鉛鋅礦深部礦區(qū)進(jìn)行了3個中段15個測點(diǎn)的地應(yīng)力測試,獲得了該礦區(qū)原巖應(yīng)力場分布及變化規(guī)律,可為后續(xù)安全生產(chǎn)設(shè)計提供可靠基礎(chǔ)數(shù)據(jù)。
[Abstract]:In order to solve the problems of low accuracy and poor reliability of AE method in measuring in-situ stress, the advanced MTS 815 material testing machine is used as the loading equipment. PCI-2 acoustic emission instrument as acoustic emission signal acquisition equipment, and through the introduction of external parameters technology transformation, the loading equipment and acoustic emission instrument data acquisition real-time synchronization. The problem of the relationship between the characteristic points of acoustic emission signal and the stress value is solved, and the accuracy and accuracy of the measurement are improved. The excitation characteristics and rules of acoustic emission (AE) signals of rock specimens under multi-stage cyclic loading are analyzed and studied. The method and waveform processing technology for accurately obtaining the characteristic points of in-situ stress are found. The reliability of the test has been greatly improved. By using the system, the in-situ stress of 15 sites in 3 middle sections of Xiaochangba Lead-Zinc Mine of Baiyin Group, Gansu Province, has been tested. The distribution and variation of the original rock stress field in the mining area are obtained, which can provide reliable basic data for the subsequent safety production design.
【作者單位】： 中南大學(xué)資源與安全工程學(xué)院;中南大學(xué)高等研究中心;
【基金】：國家自然科學(xué)基金(51322403) 湖南省自然科學(xué)基金(2015JJ2172)
【分類號】：TD311
【正文快照】： 地應(yīng)力作為各種地下巖土開挖工程變形和破壞的根本作用力,其分布和變化規(guī)律對確定工程巖體力學(xué)屬性、進(jìn)行圍巖穩(wěn)定性分析、實現(xiàn)巖土工程決策、設(shè)計和開挖的科學(xué)化具有重要意義[1-3],特別是對于深部地下礦產(chǎn)資源的安全高效開采尤為重要[4-5]。目前,開展深部地應(yīng)力測量和構(gòu)造應(yīng)，

本文編號：1480994