本文選題：采礦工程 + 松軟煤體�。� 參考：《巖石力學(xué)與工程學(xué)報(bào)》2017年S1期

【摘要】：運(yùn)用自行研制的型煤制樣設(shè)備,借助RMT 150B巖石力學(xué)試驗(yàn)系統(tǒng)對(duì)不同含水率及黏土含量下松軟煤體的力學(xué)特征開展試驗(yàn)研究。結(jié)果表明:(1)在試驗(yàn)含水率(1.59%~6.50%)范圍內(nèi),相同黏土含量下的松軟煤體均存在一個(gè)臨界含水率,在該含水率水平時(shí),煤體的抗壓強(qiáng)度最高、彈性模量最大;(2)黏土含量由4.00%增加到19.36%過程中,各含水率下的松軟煤體抗壓強(qiáng)度和彈性模量均呈先增后減的變化趨勢(shì),極高點(diǎn)黏土含量皆在11.68%左右;(3)其他條件相同時(shí),隨含水率的增大、黏土含量的增多,松軟煤體脆性降低而延性增加,泊松比逐漸增大;(4)松軟煤體顆粒間液橋力隨含水率的變化是煤體宏觀力學(xué)行為演化的主要原因,適量的黏土顆粒能夠作為膠結(jié)物進(jìn)一步強(qiáng)化煤體。研究成果對(duì)松軟煤層的安全高效開采具有重要的理論意義和工程應(yīng)用價(jià)值。
[Abstract]:With the help of RMT 150B rock mechanics test system, the mechanical characteristics of soft coal under different moisture content and clay content were studied by using the self-developed briquette sample preparation equipment. The results show that there exists a critical moisture content in soft coal with the same clay content in the range of water content of 1.59 and 6.50), and the compressive strength of the coal is the highest at this water content level. When the content of clay increased from 4.00% to 19.36%, the compressive strength and elastic modulus of soft coal increased first and then decreased, and the clay content at the extreme high point was 11.68% or so. With the increase of water content and clay content, the brittleness of soft coal decreases and the ductility increases. Poisson's ratio increases gradually) the variation of liquid bridge force between particles of soft coal with water content is the main reason for the evolution of macroscopic mechanical behavior of coal. Proper amount of clay particles can be used as cement to further strengthen coal body. The research results have important theoretical significance and engineering application value for safe and efficient mining of soft coal seam.
【作者單位】： 安徽理工大學(xué)深部煤礦采動(dòng)響應(yīng)與災(zāi)害防控安徽省重點(diǎn)實(shí)驗(yàn)室;安徽理工大學(xué)能源與安全學(xué)院;淮南礦業(yè)(集團(tuán))有限責(zé)任公司;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(U1361208,51504005) 安徽理工大學(xué)深部煤礦采動(dòng)響應(yīng)與災(zāi)害防控安徽省重點(diǎn)實(shí)驗(yàn)室開放基金項(xiàng)目(KLDCMERDPC15105)~~
【分類號(hào)】：TD315
，

本文編號(hào)：1908978