【摘要】：近些年由于我國經(jīng)濟(jì)的快速騰飛,且工業(yè)產(chǎn)業(yè)在我國經(jīng)濟(jì)中占主要地位,我國的能源資源生產(chǎn)及消耗量日益增多。當(dāng)?shù)孛娴V產(chǎn)資源的開采日漸枯竭,世界各國許多礦產(chǎn)資源的挖掘深度也不斷增加,我們稱此為深部開采。但是隨著開采的不斷深入或者在深部采礦過程中,人們逐漸對深部復(fù)雜的巖層性能存在一些現(xiàn)有巖石力學(xué)理論無法對此作出很好的闡述。當(dāng)開采深度不斷增加時(shí),許多復(fù)雜的地理與天然地質(zhì)問題等也伴隨產(chǎn)生,隨之而來的煤礦安全事故時(shí)有發(fā)生,所以人們在巷道中的安全性受到極大的影響。其中煤巖組合巖體的動(dòng)力擾動(dòng)失穩(wěn)也是地下工程中較為嚴(yán)峻的災(zāi)害之一。針對煤巖的動(dòng)態(tài)力學(xué)特性,本文對SHPB實(shí)驗(yàn)裝置進(jìn)行了稍許改進(jìn),在入射桿與透射桿各貼兩片應(yīng)變片,以便更好的得到煤巖體的應(yīng)力波形。通過計(jì)算發(fā)現(xiàn)一維應(yīng)力理論不適用于煤巖體的波形計(jì)算,因此本文提出了對煤巖體的波形進(jìn)行分層計(jì)算,并提出其計(jì)算公式。本文運(yùn)用巖石力學(xué)、巖石沖擊動(dòng)力學(xué)等理論分析了動(dòng)力擾動(dòng)下層狀巖體的動(dòng)力學(xué)特性。通過層狀在SHPB試驗(yàn)系統(tǒng)下的沖擊破壞試驗(yàn)得出數(shù)據(jù),并同時(shí)整理、分析數(shù)據(jù)以及同時(shí)對破壞后的試件進(jìn)行研究分析后,得出沖擊載荷下層狀巖體試樣的破壞過程分析。通過SHPB實(shí)驗(yàn)裝置系統(tǒng)對層狀巖體進(jìn)行單軸沖擊試驗(yàn),并對實(shí)驗(yàn)結(jié)果數(shù)據(jù)的整理與分析,利用一維應(yīng)力理論得到其應(yīng)力-應(yīng)變曲線,綜合其試驗(yàn)后破裂特征與數(shù)據(jù)分析得到了煤巖組合體試樣在單軸沖擊下的破壞特征與整體強(qiáng)度分析。最后利用Ansys軟件對煤巖組合體破壞規(guī)律進(jìn)行仿真還原,同時(shí)對模擬結(jié)果與試驗(yàn)分析處理后的結(jié)果相結(jié)合,從動(dòng)態(tài)力學(xué)性能的角度研究與分析煤巖組合體的動(dòng)力學(xué)破壞機(jī)制。
[Abstract]:In recent years, due to the rapid development of our economy, and the industrial industry occupies the main position in our economy, the production and consumption of energy resources in our country is increasing day by day. When the surface mineral resources are exhausted day by day, the mining depth of many countries all over the world is also increasing, which we call deep mining. However, with the development of mining or in the process of deep mining, there are some existing rock mechanics theories that can not be explained well. With the increasing of mining depth, many complicated geographical and natural geological problems also come into being, and the coal mine safety accidents occur from time to time, so the safety of people in the roadway is greatly affected. The dynamic disturbance instability of coal rock mass is one of the severe disasters in underground engineering. According to the dynamic mechanical properties of coal and rock, the SHPB experimental device is improved slightly, two strain gauges are attached to the incident rod and the transmission rod respectively, so that the stress waveform of coal and rock mass can be obtained better. It is found that the one-dimensional stress theory is not suitable for the waveform calculation of coal and rock mass, so this paper puts forward the layered calculation of the waveform of coal and rock mass and its calculation formula. In this paper, the dynamic characteristics of layered rock mass under dynamic disturbance are analyzed by means of rock mechanics and rock impact dynamics. The data are obtained from the impact failure test of layered rock under SHPB test system. The data are analyzed and analyzed at the same time, and the failure process of layered rock samples under impact load is obtained after studying and analyzing the specimens after failure. Uniaxial impact test of layered rock mass was carried out by SHPB system. The stress-strain curves were obtained by one-dimensional stress theory. According to the fracture characteristics and data analysis after the test, the failure characteristics and overall strength analysis of coal and rock assemblage samples under uniaxial impact are obtained. Finally, the failure law of coal and rock assemblage is reduced by using Ansys software. At the same time, the dynamic failure mechanism of coal and rock assemblage is studied and analyzed from the point of view of dynamic mechanical properties by combining the simulation results with the results of experimental analysis and treatment.
【學(xué)位授予單位】：湖南科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TD315.1

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