【摘要】：進(jìn)路寬度是反映無(wú)底柱分段崩落法技術(shù)經(jīng)濟(jì)效益的重要技術(shù)指標(biāo),為確定無(wú)底柱分段崩落法最優(yōu)進(jìn)路寬度,以新疆某鐵礦為工程背景,基于隨機(jī)介質(zhì)放礦理論、wilson彈塑性理論、FLAC3D數(shù)值模型,通過(guò)礦柱穩(wěn)定性分析提出了進(jìn)路極限寬度公式,并得到該礦的進(jìn)路極限寬度為7m。結(jié)合技術(shù)經(jīng)濟(jì)分析,采用最高積分法對(duì)7種進(jìn)路寬度進(jìn)行優(yōu)化。優(yōu)化結(jié)果表明,最優(yōu)進(jìn)路寬度為6.6m,除了可獲得良好的放礦效果外,還可使每一進(jìn)路增加60萬(wàn)元收益。該進(jìn)路寬度綜合考慮了安全、技術(shù)、經(jīng)濟(jì)等因素,既保證了采場(chǎng)的安全性、掘支技術(shù)的可行性,又降低了礦石的貧損指標(biāo),提高了回采的經(jīng)濟(jì)效益,研究成果對(duì)礦山生產(chǎn)具有實(shí)際指導(dǎo)意義。
[Abstract]:Approach width is an important technical index to reflect the technical and economic benefits of sublevel caving method without bottom pillar. In order to determine the optimal route width of sublevel caving method without bottom pillar, taking an iron ore mine in Xinjiang as the engineering background, based on the theory of drawing ore in random medium and wilson elastoplastic theory, this paper discusses the feasibility of this method. Based on the FLAC3D numerical model, the formula of the limit width of the ore entry path is put forward through the stability analysis of the pillar, and the limit width of the route is 7 m. Combined with the technical and economic analysis, the maximum integral method is used to optimize the width of 7 kinds of paths. The optimization results show that the optimal path width is 6.6 m, which can not only obtain good ore drawing effect, but also increase the income of 600000 yuan per route. The safety, technology and economy are taken into account in the width of the road, which not only ensures the safety of the stope and the feasibility of the excavating and supporting technology, but also reduces the poor loss index of the ore and improves the economic benefit of the mining. The research results are of practical significance to mine production.
【作者單位】： 重慶大學(xué)煤礦災(zāi)害動(dòng)力學(xué)與控制國(guó)家重點(diǎn)實(shí)驗(yàn)室;重慶大學(xué)資源及環(huán)境科學(xué)學(xué)院;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51674049);國(guó)家自然科學(xué)基金資助項(xiàng)目(51174241)~~
【分類(lèi)號(hào)】：TD853.362
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本文編號(hào)：2316482