【摘要】：李樓鐵礦是國內(nèi)大型的地下黑色金屬礦山之一,采用1OOm高階段空?qǐng)鏊煤蟪涮畈傻V法,分礦房礦柱兩步驟回采。由于高階段、高分段而形成的大結(jié)構(gòu)采場(chǎng),單個(gè)采場(chǎng)空區(qū)體積達(dá)10～16萬m3,在高階段兩步驟回采過程中,一步回采與二步回采的時(shí)間銜接、充填體配比及其強(qiáng)度性能、充填體強(qiáng)度在采場(chǎng)中的空間分布規(guī)律等方面嚴(yán)重制約采場(chǎng)的安全性和經(jīng)濟(jì)性。因此,本文以李樓鐵礦為項(xiàng)目依托,通過現(xiàn)場(chǎng)工程地質(zhì)調(diào)查、室內(nèi)力學(xué)實(shí)驗(yàn)、理論分析、數(shù)值模擬、井下原位強(qiáng)度檢測(cè)和電鏡掃描等多種方法研究高階段膠結(jié)充填體的強(qiáng)度特性及充填配比。主要內(nèi)容如下:(1)通過工程地質(zhì)調(diào)查和室內(nèi)力學(xué)試驗(yàn),獲取了礦區(qū)巖體優(yōu)勢(shì)結(jié)構(gòu)面的產(chǎn)狀與礦巖力學(xué)參數(shù),經(jīng)過對(duì)礦巖的力學(xué)參數(shù)分析,得到了相關(guān)巖體的力學(xué)參數(shù),為后續(xù)的數(shù)值模擬計(jì)算和分析奠定了基礎(chǔ)�，F(xiàn)場(chǎng)調(diào)查發(fā)現(xiàn)二步回采礦柱時(shí),充填體破壞垮落嚴(yán)重,且破壞部位分布不均勻,突顯了充填體料漿配比、強(qiáng)度性能、強(qiáng)度的空間分布及二步回采時(shí)間等對(duì)二步回采安全性有重要的影響。(2)通過全尾砂材料性能試驗(yàn)研究,建立了全尾砂膠結(jié)充填體固化強(qiáng)度與養(yǎng)護(hù)齡期之間的數(shù)學(xué)表達(dá)式。在高階段嗣后充填法中,引入表征膠結(jié)充填體的變形比能與礦柱回采釋放比能關(guān)系的能量匹配系數(shù),獲得了該系數(shù)與礦石的彈性模量、垂直應(yīng)力與充填體固結(jié)強(qiáng)度的關(guān)系,揭示了膠結(jié)充填體固化時(shí)間與礦柱能量的內(nèi)在聯(lián)系,定量分析了二步驟回采礦柱的合理時(shí)間。(3)通過分析膠結(jié)充填體與圍巖的力學(xué)接觸狀態(tài),推導(dǎo)了膠結(jié)充填體強(qiáng)度極限側(cè)壓狀態(tài)下的三維力學(xué)模型,揭示了充填體應(yīng)力拱效應(yīng)的分布規(guī)律。采用FLAC兩步驟數(shù)值模擬,分析了不同配比參數(shù)下膠結(jié)充填體應(yīng)力場(chǎng)、位移場(chǎng)和塑性破壞區(qū)。綜合礦山充填工程布置、三維力學(xué)模型以及兩步驟數(shù)值模擬回采,提出了高階段采場(chǎng)充填配比設(shè)計(jì)方案。(4)基于李樓鐵礦充填體強(qiáng)度檢測(cè)和微觀電鏡掃描實(shí)驗(yàn),對(duì)井下原位強(qiáng)度與地表試件進(jìn)行差異化分析,獲得了高階段采場(chǎng)充填體強(qiáng)度呈“駝峰”分布規(guī)律,從微觀孔隙結(jié)構(gòu)發(fā)育特征揭示了自重壓力與采場(chǎng)排水布置對(duì)高階段膠結(jié)充填體固化強(qiáng)度的作用機(jī)理。在采場(chǎng)充填配比優(yōu)化區(qū)內(nèi),實(shí)現(xiàn)安全開采的同時(shí),降低了充填成本,提高了經(jīng)濟(jì)效益。
[Abstract]:Lilou Iron Mine is one of the large underground ferrous metal mines in China. The method of 1OOm high stage open field subsequent filling mining is adopted, which is divided into two steps of quarry pillar mining. Because of the large structure stope formed by high stage and high section, the volume of single stope goaf reaches 10 ~ 160000 m3. In the high stage two-step mining process, the time connection between one-step extraction and two-step mining, the ratio of backfill and its strength performance are discussed. The safety and economy of stope are seriously restricted by the spatial distribution of backfill strength in stope. Therefore, based on the project of Li Lou Iron Mine, through field engineering geological investigation, laboratory mechanical experiments, theoretical analysis, numerical simulation, In situ strength testing and scanning electron microscopy are used to study the strength characteristics and filling ratio of cemented backfill in high stage. The main contents are as follows: (1) through engineering geological investigation and laboratory mechanical test, the occurrence and mechanical parameters of dominant structure plane of rock mass in mining area are obtained. Through the analysis of mechanical parameters of ore rock, the mechanical parameters of related rock mass are obtained. It lays a foundation for subsequent numerical simulation and analysis. The field investigation found that when the two-step mining pillar was returned, the failure of the backfill was serious, and the distribution of the damaged part was not even, which highlighted the mixture ratio and strength performance of the filling body. The spatial distribution of strength and the time of two-step mining have important effects on the safety of two-step mining. (2) the mathematical expression between the curing strength and curing age of the cemented filling is established through the experimental study of the properties of the whole tailings. In the high stage subsequent filling method, the energy matching coefficient is introduced to characterize the relationship between the deformation specific energy of cemented filling body and the specific energy ratio of pillar recovery and release, and the relationship between the coefficient and the elastic modulus of ore, vertical stress and consolidation strength of filling body is obtained. The relationship between solidification time of cemented filling body and pillar energy is revealed, and the reasonable time of two-step return mining pillar is quantitatively analyzed. (3) the mechanical contact state between cemented filling body and surrounding rock is analyzed. The 3D mechanical model of cemented filling under ultimate lateral pressure is derived, and the distribution of stress arch effect is revealed. Using FLAC two-step numerical simulation, the stress field, displacement field and plastic failure zone of cemented filling body under different proportioning parameters are analyzed. According to the layout of mine filling engineering, three-dimensional mechanical model and two-step numerical simulation, the design scheme of filling ratio in high stage stope is put forward. (4) based on the strength test of the filling body of Lilou Iron Mine and the microscopic electron microscope scanning experiment, The difference analysis between underground in-situ strength and surface specimen is carried out, and the distribution law of the strength of filling body in high stage stope is shown as "hump". The mechanism of gravity pressure and stope drainage arrangement on solidification strength of cemented backfill at high stage was revealed from the microcosmic pore structure development characteristics. In the optimized area of stope filling ratio, the safe mining is realized, the filling cost is reduced, and the economic benefit is improved.
【學(xué)位授予單位】：北京科技大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2017
【分類號(hào)】：TD853.343;TD861.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 于跟波;呂文生;王昆;;尾砂膠結(jié)充填體側(cè)限高應(yīng)力固結(jié)特性實(shí)驗(yàn)研究[J];中國礦業(yè);2017年07期

2 陳鑫政;楊小聰;郭利杰;李宗楠;;充填配比方案優(yōu)化的正交試驗(yàn)研究[J];金屬礦山;2016年11期

3 明建;胡乃聯(lián);孫金海;王莉;;全尾砂壓縮固結(jié)充填實(shí)驗(yàn)研究[J];實(shí)驗(yàn)技術(shù)與管理;2016年09期

4 雷大星;張耀平;鄒雄剛;;基于力學(xué)強(qiáng)度試驗(yàn)的膠結(jié)充填優(yōu)化配比研究[J];礦業(yè)研究與開發(fā);2016年07期

5 王安福;楊志強(qiáng);高謙;孫光華;;某鐵礦膠固粉與水泥膠結(jié)充填體強(qiáng)度對(duì)比試驗(yàn)[J];金屬礦山;2016年07期

6 李鑫;王炳文;游家梁;楊寒雯;侯陽;解立赫;李騰龍;;尾砂膠結(jié)充填體力學(xué)性能與微觀結(jié)構(gòu)研究[J];中國礦業(yè);2016年06期

7 李立濤;楊志強(qiáng);高謙;;石人溝鐵礦全尾砂充填膠凝材料配比優(yōu)化試驗(yàn)[J];金屬礦山;2016年04期

8 徐文彬;田喜春;侯運(yùn)炳;魏書祥;岳潤芳;樊攀峰;朱時(shí)廷;殷天軍;;全尾砂固結(jié)體固結(jié)過程孔隙與強(qiáng)度特性實(shí)驗(yàn)研究[J];中國礦業(yè)大學(xué)學(xué)報(bào);2016年02期

9 甘德清;申夢(mèng)飛;孫光華;劉志義;何水清;;高海拔地區(qū)礦山尾砂膠結(jié)充填體強(qiáng)度特性分析[J];化工礦物與加工;2016年03期

10 王莉;明世祥;王通潮;張小慶;;施加載荷對(duì)全尾砂膠結(jié)充填體強(qiáng)度影響的試驗(yàn)研究[J];有色金屬(礦山部分);2016年01期

相關(guān)會(huì)議論文 前2條

1 馬鳳山;李克蓬;劉鋒;盧蓉;岳斌;雷揚(yáng);;金川二礦區(qū)充填體穩(wěn)定性的影響因素分析[A];中國科學(xué)院地質(zhì)與地球物理研究所2015年度（第15屆）學(xué)術(shù)論文匯編——工程地質(zhì)與水資源研究室[C];2016年

2 于學(xué)馥;劉同有;;金川的充填機(jī)理與采礦理論[A];面向21世紀(jì)的巖石力學(xué)與工程：中國巖石力學(xué)與工程學(xué)會(huì)第四次學(xué)術(shù)大會(huì)論文集[C];1996年

相關(guān)博士學(xué)位論文 前5條

1 劉浪;礦山充填膏體配比優(yōu)化與流動(dòng)特性研究[D];中南大學(xué);2013年

2 馬長年;金川二礦區(qū)下向分層采礦充填體力學(xué)行為及其作用的研究[D];中南大學(xué);2011年

3 李江騰;硬巖礦柱失穩(wěn)及時(shí)間相依性研究[D];中南大學(xué);2005年

4 劉志祥;深部開采高階段尾砂充填體力學(xué)與非線性優(yōu)化設(shè)計(jì)[D];中南大學(xué);2005年

5 韓斌;金川二礦區(qū)充填體可靠度分析與1#礦體回采地壓控制優(yōu)化研究[D];中南大學(xué);2004年

相關(guān)碩士學(xué)位論文 前6條

1 陳榮軍;復(fù)雜條件下某礦體雙中段回采開采效應(yīng)研究[D];江西理工大學(xué);2015年

2 何發(fā)龍;膏體充填采礦關(guān)鍵安全問題研究[D];中南大學(xué);2013年

3 周士霖;深部開采充填體穩(wěn)定性及與巖體智能匹配研究[D];中南大學(xué);2012年

4 楊紅偉;深部礦巖工程條件與開挖穩(wěn)定性分析[D];中南大學(xué);2010年

5 李永輝;全尾砂與分級(jí)尾砂膠結(jié)充填材料配比試驗(yàn)與理論研究[D];江西理工大學(xué);2008年

6 倪彬;提高金川二礦區(qū)膠結(jié)充填體穩(wěn)定性的試驗(yàn)研究[D];中南大學(xué);2007年

，

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