基于響應曲面的采場(chǎng)結構參數優(yōu)化方法與敏感性分析
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華北理工大學(xué)

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國家自然科學(xué)基金資助項目(52204134),河北省中央引導地方科技專(zhuān)項項目資助(236Z4105G);河北省自然科學(xué)基金資助項目(E2021209127).


Optimization Method and Sensitivity Analysis of Stope Structure Parameters Based on Response Surface
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North China University of Science and Technology

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    摘要:

    為解決采場(chǎng)結構參數取值不合理導致頂板失穩或生產(chǎn)能力不足等難題。以河北省某鐵礦為背景,對如何調整獲取理想采場(chǎng)結構參數及其參數敏感性進(jìn)行了研究。首先,為獲取巖體質(zhì)量信息,對北區巖體進(jìn)行了巖體質(zhì)量調查葫男,并采用具有穩定概率的拓展Mathews穩定圖法初步確定了采場(chǎng)的寬度和長(cháng)度區間伟氯。然后,利用FLAC 3D數值模擬,探究了采場(chǎng)頂板最大沉降量隨結構參數變化的變形規律饮估,結合響應面法構建了采場(chǎng)頂板沉降量預測模型,探明了影響采場(chǎng)頂板沉降的自身因素敏感性及其交互作用關(guān)系骚亿。最后,綜合考慮安全與礦塊大小對該礦體北區采場(chǎng)進(jìn)行了采場(chǎng)結構參數優(yōu)化友熟,并進(jìn)行工業(yè)試驗,驗證結果合理性。得到了如下結論:北區巖體整體評級為Ⅴ級,質(zhì)量較差;采場(chǎng)頂板沉降量對各參數敏感程度:采場(chǎng)寬度>采場(chǎng)長(cháng)度>采場(chǎng)高度中纪;該礦體最佳采場(chǎng)結構參數為寬12m馋缅、長(cháng)36m、高60m,采空區輪廓較為平整,能夠保持穩定。結果表明:響應面法適用于地下采場(chǎng)的空間設計,對同區域巖體采場(chǎng)結構參數調整具有一定的指導意義;工業(yè)試驗穩定性較好,優(yōu)化結果較為合理。研究成果可為如何調整合理的采場(chǎng)結構參數以及正確協(xié)調安全與生產(chǎn)能力提供理論依據恨统。

    Abstract:

    In order to solve the problems such as roof instability or insufficient production capacity caused by unreasonable value of stope structure parameters. Taking an iron ore mine in Hebei Province as the background, how to adjust and obtain the ideal stope structure parameters and their sensitivity are studied. Firstly, in order to obtain the rock mass quality information, the rock mass quality survey is carried out on the northern rock mass, and the width and length of the stope are preliminarily determined by the extended Mathews stability diagram method with stable probability. Then, FLAC 3D numerical simulation is used to explore the deformation law of the maximum subsidence of stope roof with the change of structural parameters, and the prediction model of the subsidence of stope roof is built in combination with the response surface method, and the sensitivity of the factors affecting the subsidence of stope roof and its interaction relationship are proved. Finally, considering the safety and block size, the stope structure parameters of the north stope of the ore body are optimized, and the industrial test is carried out to verify the rationality of the results. The conclusions are as follows: the overall rating of the northern rock mass is grade Ⅴ and the quality is poor; The sensitivity of stope roof settlement to each parameter is as follows: stope width > stope length > stope height; The optimal stope structure parameters of the ore body are 12m wide, 36m long and 60m high, and the mined-out area contour is relatively flat and can maintain stability. The results show that the response surface method is suitable for the spatial design of underground stope, and has certain guiding significance for the adjustment of stope structural parameters in rock mass in the same area. The stability of industrial test is good, and the optimization results are reasonable. The research results can provide theoretical basis for how to adjust reasonable stope structural parameters and correctly coordinate safety and production capacity.

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  • 收稿日期:2024-05-17
  • 最后修改日期:2024-06-05
  • 錄用日期:2024-06-11
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