機械化上向水平分層充填法在緩傾斜薄礦體中的應用
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長(cháng)沙礦山研究院有限責任公司

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TD853.34

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Application of Mechanized Upward Horizontal Layered Filling Method in gently inclined and thin ore body
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Changsha Mining Research Institute Co., Ltd

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    摘要:

    針對貴州某螢石礦緩傾斜薄礦體開(kāi)采難度大慢筝、機械化程度低、資源利用受限等問(wèn)題,結合該礦體賦存特征和開(kāi)采技術(shù)條件,推薦采用機械化上向水平分層充填法回采,根據采場(chǎng)結構參數、回采工藝梢死,使用Mathews穩定圖法和數值模擬軟件分析了采場(chǎng)的穩定性启泣,結果表明采場(chǎng)跨度、上盤(pán)及頂板暴露面積均小于理論極限,采場(chǎng)頂板沉降量介于0.96m~4.32mm之間,底部最大底鼓量為3.5mm,最大壓應力為9.8MPa董揪,拉應力值遠小于充填體抗拉強度0.44MPa,塑性區未形成貫穿;現場(chǎng)應用后,礦塊生產(chǎn)能力達150t/d、采切比為12.96m/kt、損失率為10%瑞簇、貧化率為8%,取得了較好的經(jīng)濟效益。

    Abstract:

    In addressing the formidable challenges posed by the mining of a gently inclined thin ore body of a fluorite mine in Guizhou, which includes arduous mining conditions, low mechanization levels, and constrained resource utilization, combined with the unique occurrence characteristics and mining technical conditions of the ore body, the mechanized upward horizontal layered filling method was proposed, this study introduced its stope structural parameters and extraction technology, a comprehensive analysis of the stope stability was conducted, utilizing the Mathews stability graph method and advanced numerical simulation software, and the results show that the stope span, the exposed area of the hanging wall and the roof are less than the theoretical limit, the settlement of the stope roof is between 0.96m~4.32mm, the maximum arch of the bottom is 3.5mm, the maximum compressive stress is 9.8MPa, the tensile stress value is far less than the tensile strength of the filling body, which stands at 0.44MPa, and the plastic zone does not form penetration. The application results of site test show that the stope production capacity is 150t/d, the stripping ratio is 12.96m/kt, the loss rate is 10%, and the dilution rate is 8%, the significant economic benefits have been achieved.

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  • 收稿日期:2024-04-22
  • 最后修改日期:2024-06-09
  • 錄用日期:2024-06-14
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