本文選題：安全工程　切入點(diǎn)：殘礦回采　出處：《華南理工大學(xué)》2015年碩士論文

【摘要】：黃金礦產(chǎn)是國家的戰(zhàn)略性資源,也是一種不可再生資源。隨著黃金礦產(chǎn)資源的日漸枯竭,以及國內(nèi)外市場(chǎng)對(duì)黃金需求的加大,殘礦回采逐漸進(jìn)入人們的視野。殘礦回采多為老采空區(qū)周邊作業(yè),其工作面往往與老采空區(qū)、崩落區(qū)聯(lián)通或緊鄰。與正規(guī)開采相比,殘礦回采具有更高的風(fēng)險(xiǎn)和技術(shù)難度。因此,開展殘礦回采結(jié)構(gòu)模型穩(wěn)定性以及采場(chǎng)安全參數(shù)研究,對(duì)于減少生產(chǎn)安全事故,具有十分重要的實(shí)際意義。論文在國家“十二?五”科技支撐計(jì)劃項(xiàng)目“大型金礦綠色采選冶技術(shù)研究及示范”(2012BAB08B00)的課題“復(fù)雜破碎金礦高效開采工藝技術(shù)”(2012BAB08B02)的支持下,以某大型黃金礦山整合礦區(qū)的殘礦回采工程體為研究對(duì)象,以殘礦體安全回采為目標(biāo),開展殘礦回采結(jié)構(gòu)模型穩(wěn)定性以及采場(chǎng)安全參數(shù)研究。取得如下主要研究成果:(1)通過實(shí)地調(diào)研,掌握了整合礦區(qū)開采方式、殘礦資源分布等基本情況,選取典型中段,借助Dimine礦山軟件,構(gòu)建了三維可視化礦體模型。三維可視化礦體模型表明,ZT5礦體的礦脈位于山脊之下,殘礦資源整體上呈現(xiàn)出礦脈不完整、分布不均勻、賦存于采空區(qū)周邊的特征;ZT8礦體的殘礦厚度較薄,沿崩落區(qū)呈狹長或矩形狀分布。(2)選取典型殘礦回采工程體,構(gòu)建了模型Ⅰ(單側(cè)面和上部緊鄰采空區(qū))、模型Ⅱ(3個(gè)側(cè)面和上部緊鄰采空區(qū))、模型Ⅲ(單一側(cè)面緊鄰采空區(qū))等3個(gè)殘礦回采結(jié)構(gòu)模型,充分反映了殘礦回采工程體的賦存環(huán)境。(3)引入完整性指數(shù)對(duì)巖體抗拉強(qiáng)度進(jìn)行折減,運(yùn)用結(jié)構(gòu)力學(xué)梁理論分析和數(shù)值分析兩種方法,對(duì)3個(gè)殘礦回采結(jié)構(gòu)模型的穩(wěn)定性進(jìn)行綜合判定。穩(wěn)定性綜合判定表明,模型Ⅰ和模型Ⅱ處于穩(wěn)定狀態(tài);模型Ⅲ處于不穩(wěn)定狀態(tài)。(4)運(yùn)用Monte Carlo法和Paloheimo法對(duì)3個(gè)殘礦回采結(jié)構(gòu)模型進(jìn)行可靠性分析,確定殘礦回采工程體在探采中的采場(chǎng)安全參數(shù)。結(jié)果表明,1)模型Ⅰ。當(dāng)設(shè)計(jì)采場(chǎng)跨度不變、向上回采擬采礦塊時(shí),應(yīng)保證頂板的安全厚度大于14m;當(dāng)設(shè)計(jì)采場(chǎng)厚度不變,沿跨度方向回采擬采礦體時(shí),應(yīng)保證采場(chǎng)的安全跨度小于29m;2)模型Ⅱ。當(dāng)懸梁跨度不變時(shí),回采過程中應(yīng)保證頂板的懸梁厚度大于23m;3)模型Ⅲ。當(dāng)設(shè)計(jì)采場(chǎng)頂板厚度不變,沿跨度方向回采礦體時(shí),應(yīng)保證采場(chǎng)的安全跨度小于70m。(5)整合礦區(qū)地表沉降監(jiān)測(cè)結(jié)果表明,截至2013年9月,地表位移變形已趨于穩(wěn)定,巖體自重應(yīng)力場(chǎng)已趨于平衡。典型殘礦工程體的試驗(yàn)開采表明,模型Ⅰ對(duì)應(yīng)的試驗(yàn)采場(chǎng)處于穩(wěn)定狀態(tài);模型Ⅱ?qū)?yīng)的巖體處于穩(wěn)定狀態(tài);模型Ⅲ對(duì)應(yīng)的試驗(yàn)采場(chǎng)發(fā)生失穩(wěn)破壞。與結(jié)構(gòu)模型穩(wěn)定性分析結(jié)果基本一致。
[Abstract]:Gold mineral is a national strategic resource and also a non-renewable resource. With the depletion of gold mineral resources and the increasing demand for gold in the domestic and foreign markets, The residual mining has gradually entered the people's visual field. The residual mining is mostly the operation around the old goaf, and its working face is often connected with or adjacent to the old goaf and caving area. Compared with the normal mining, the mining face of the mining face is usually connected with or adjacent to the old goaf, caving area and normal mining. Residual mining has higher risk and technical difficulty. Therefore, it is of great practical significance to study the stability of stope structure model and stope safety parameters for reducing production safety accidents. Supported by the research and demonstration of green mining and metallurgy technology for large-scale gold deposits in the "Science and Technology support Plan Project", "High efficiency mining technology for complex broken gold deposits" (2012BAB08B02), Taking the residual mining engineering body of a large gold mine integrated mining area as the research object, and taking the safety mining of the residual ore body as the target, The stability of stope structure model and safety parameters of stope are studied. The main research results are as follows: 1) through field investigation, we master the basic conditions of integrating mining mode and residual resource distribution, and select the typical middle section. With the help of Dimine software, a 3D visual orebody model is constructed. The 3D visual orebody model shows that the veins of the ZT5 orebody are located below the ridge, and the residual resources are incomplete and unevenly distributed on the whole. The ZT8 orebody, which occurs around the goaf, is thin in thickness and has a narrow or rectangular distribution along the caving area. Three residual mining structure models, model 鈪，

本文編號(hào)：1656775