【摘要】：獲各琦銅礦初期露天開(kāi)采采剝嚴(yán)重失調(diào),現(xiàn)轉(zhuǎn)為地下開(kāi)采,經(jīng)多年大規(guī)模連續(xù)開(kāi)采,淺部可供開(kāi)采資源日益減少,向深部進(jìn)行開(kāi)采是必然趨勢(shì)。因此,如何合理控制地壓將是礦山要解決的首要問(wèn)題,本文在分析獲各琦銅礦區(qū)三維地應(yīng)力場(chǎng)的變化及分布規(guī)律基礎(chǔ)上,對(duì)巷道支護(hù)參數(shù)和采場(chǎng)結(jié)構(gòu)參數(shù)進(jìn)行優(yōu)化研究,為獲各琦銅礦區(qū)安全高效采礦和進(jìn)一步擴(kuò)大生產(chǎn)能力提供理論參考。主要研究?jī)?nèi)容和結(jié)論如下:(1)對(duì)獲各琦銅礦所在區(qū)域的地質(zhì)構(gòu)造進(jìn)行收集研究,分析礦體賦存的地質(zhì)條件;針對(duì)礦區(qū)主要礦巖,進(jìn)行巖石單軸和三軸抗壓強(qiáng)度試驗(yàn)、抗拉強(qiáng)度試驗(yàn)和點(diǎn)荷載試驗(yàn),基于回歸分析和巖體分類獲得巖體力學(xué)指標(biāo)。(2)在礦區(qū)選取三個(gè)中段布置的5個(gè)測(cè)點(diǎn),通過(guò)現(xiàn)場(chǎng)套孔應(yīng)力解除法測(cè)量,并應(yīng)用專用巖體應(yīng)力計(jì)算程序LUT—str計(jì)算出5個(gè)測(cè)點(diǎn)的六個(gè)應(yīng)力分量值,研究礦區(qū)水平應(yīng)力分布規(guī)律以及地應(yīng)力與深度的變化關(guān)系特征。(3)采用塑性區(qū)范圍作為綜合評(píng)價(jià)巷道圍巖穩(wěn)定性的指標(biāo),采用理論分析和數(shù)值模擬計(jì)算方法研究巷道穩(wěn)定性,并根據(jù)組合梁理論優(yōu)化巷道支護(hù)參數(shù)。(4)根據(jù)極限分析求解采場(chǎng)頂板安全厚度,應(yīng)用強(qiáng)度折減法、數(shù)值分析法和神經(jīng)網(wǎng)絡(luò)-遺傳算法(ANN-GA),優(yōu)化采場(chǎng)結(jié)構(gòu)參數(shù),得到采場(chǎng)參數(shù)最優(yōu)組合為控頂高度7.4m,礦房跨度11.8m,礦柱寬6.4m。
[Abstract]:At the initial stage of open-pit mining in Qizhi Copper Mine, the serious imbalance of mining and stripping is now turned into underground mining. After years of large-scale continuous mining, the shallow mining resources are decreasing day by day, and it is an inevitable trend to mine into the deep. Therefore, how to reasonably control the ground pressure will be the most important problem to be solved in the mine. Based on the analysis of the variation and distribution of the three-dimensional geostress field in the Qi-copper mine area, this paper studies the optimization of the roadway support parameters and stope structure parameters. It provides a theoretical reference for obtaining safe and efficient mining and further expanding production capacity in each Qi-copper mine area. The main contents and conclusions are as follows: (1) to collect and study the geological structure of the area where each copper deposit is located and to analyze the geological conditions of the orebody; The uniaxial and triaxial compressive strength tests, tensile strength tests and point load tests are carried out for the main ore rocks in the mining area. Based on regression analysis and rock mass classification, the rock mechanics indexes are obtained. (2) five measuring points are selected in three middle sections of mining area, and the stress relief method is used to measure them. The six stress components of five measuring points are calculated by the special rock mass stress calculation program LUT-str. The distribution law of horizontal stress in mining area and the relationship between in-situ stress and depth are studied. (3) the range of plastic zone is used as the index to evaluate the stability of roadway surrounding rock. The stability of roadway is studied by theoretical analysis and numerical simulation, and the supporting parameters of roadway are optimized according to the theory of composite beam. (4) the safe thickness of roof of stope is solved according to limit analysis, and the strength reduction method is applied. Numerical analysis method and neural network-genetic algorithm (ANN-GA) are used to optimize the stope structure parameters. The optimum combination of stope parameters is as follows: the height of controlled roof is 7.4 m, the span of mine house is 11.8 m, and the width of pillar is 6.4 m.
【學(xué)位授予單位】：江西理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD353;TD862.1

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本文編號(hào)：2310520