本文選題：煤 + 賦存深度��； 參考：《煤炭學(xué)報(bào)》2017年08期

【摘要】：淺部礦產(chǎn)資源日益枯竭,深部地下開采將成為常態(tài)。因此,對(duì)不同賦存深度,尤其是超千米深煤巖開展系統(tǒng)研究具有重要的工程意義�，F(xiàn)有研究大多通過改變圍壓、溫度等條件來模擬巖體所處的外在環(huán)境,并未采用真實(shí)賦存深度樣品開展研究,同時(shí)忽略了原位巖體初始結(jié)構(gòu)、物質(zhì)組成和性質(zhì)的差異。對(duì)取自平頂山礦區(qū)已組煤層300,600,700,850和1 050 m五個(gè)不同深度的煤巖開展系統(tǒng)試驗(yàn),研究不同賦存深度煤巖成分、細(xì)觀結(jié)構(gòu)、瓦斯吸附及聲學(xué)特性。測(cè)試結(jié)果表明:隨著賦存深度增加,煤的組成和結(jié)構(gòu)發(fā)生改變,變質(zhì)程度增大,結(jié)構(gòu)更為致密,瓦斯吸附能力增強(qiáng),超聲波在其內(nèi)傳播發(fā)生散射和折射的幾率減少,損耗能量降低,縱波波速增大。該成果可為后續(xù)開展不同賦存深度煤巖宏觀力學(xué)特性相關(guān)研究提供借鑒。
[Abstract]:The shallow mineral resources are exhausted day by day, the deep underground mining will become the normal. Therefore, it is of great engineering significance to carry out systematic research on different occurrence depth, especially over kilometer depth coal and rock. Most of the existing studies simulate the external environment of the rock mass by changing the confining pressure and temperature, and do not use the real depth samples to carry out the research, while ignoring the difference of the initial structure, material composition and properties of the in-situ rock mass. A systematic test was carried out on five coal rocks with different depths of 300600700850 and 1 050m coal seams in Pingdingshan Mining area. The composition of coal and rock, mesoscopic structure, gas adsorption and acoustical characteristics were studied. The test results show that with the increase of occurrence depth, the composition and structure of coal change, the degree of metamorphism increases, the structure becomes denser, the ability of gas adsorption increases, and the probability of scattering and refraction of ultrasonic wave propagating in the coal decreases. The loss of energy decreases and the velocity of the longitudinal wave increases. The results can be used for reference for further research on macroscopic mechanical properties of coal and rock with different occurrence depth.
【作者單位】： 四川大學(xué)水力學(xué)與山區(qū)河流開發(fā)保護(hù)國家重點(diǎn)實(shí)驗(yàn)室;四川大學(xué)水利水電學(xué)院;四川大學(xué)能源工程安全與災(zāi)害力學(xué)教育部重點(diǎn)實(shí)驗(yàn)室;中國平煤神馬集團(tuán)煉焦煤資源開發(fā)及綜合利用國家重點(diǎn)實(shí)驗(yàn)室;中國平煤神馬集團(tuán);
【基金】：優(yōu)秀青年科學(xué)基金資助項(xiàng)目(5162200272) 國家重點(diǎn)研發(fā)計(jì)劃資助項(xiàng)目(2016YFC0600702)
【分類號(hào)】：P618.11;TQ531.1

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