【摘要】：為研究礦柱破裂區(qū)寬度影響因素的敏感性,以上橫山礦床V3礦體為研究對象,基于正交試驗(yàn)原理,選取采深、采厚、條帶采寬、礦體力學(xué)參數(shù)以及礦體傾角等為主控因素,設(shè)計(jì)21個(gè)不同的模擬試驗(yàn)方案,根據(jù)相應(yīng)的模擬試驗(yàn)方案建立礦床數(shù)值模型并對礦床進(jìn)行模擬開采;運(yùn)用FALC3D自帶的fish語言編寫莫爾庫侖屈服接近度(YAIm-c)函數(shù)來模擬計(jì)算礦柱的破裂區(qū)寬度;對破裂區(qū)寬度模擬結(jié)果進(jìn)行正交方差分析得到:采深對破裂區(qū)寬度的影響顯著,條帶采寬、采厚對破裂區(qū)寬度影響不顯著;礦體抗拉強(qiáng)度對破裂區(qū)寬度的影響顯著,抗拉強(qiáng)度、黏聚力、內(nèi)摩擦角對破裂區(qū)寬度的敏感性主次順序?yàn)榭估瓘?qiáng)度內(nèi)摩擦角黏聚力。研究結(jié)果表明:采深越大,礦柱破裂區(qū)寬度越大;礦柱破裂區(qū)寬度與抗拉強(qiáng)度呈反相關(guān)。研究結(jié)果對估算礦柱破裂區(qū)寬度及安全評價(jià)礦柱穩(wěn)定性具有重要的工程意義。
[Abstract]:In order to study the sensitivity of the factors affecting the width of pillar fracture zone, the V3 orebody of Hengshan ore deposit is studied. Based on the principle of orthogonal test, mining depth, mining thickness, strip width, mechanical parameters of orebody and dip angle of orebody are selected as the main controlling factors. 21 different simulation test schemes are designed, according to the corresponding simulation test schemes, the numerical model of ore deposit is established and simulated mining of the deposit is carried out. The Mohr Coulomb yield approach (YAIm-c) function is compiled by using FALC3D's own fish language to simulate and calculate the fracture zone width of ore column. The results of orthogonal variance analysis show that the depth of mining has a significant effect on the width of fracture zone, the width of strip is not significant, and the thickness of mining has no significant effect on the width of fracture zone. The tensile strength of ore body has a significant effect on the width of fracture zone. The sensitivity of tensile strength, cohesion force and internal friction angle to the width of fracture zone is in the order of tensile strength and internal friction angle cohesion. The results show that the greater the mining depth, the larger the width of the pillar rupture zone and the inverse correlation between the width of the pillar rupture zone and the tensile strength. The results are of great engineering significance for estimating the width of pillar rupture zone and evaluating the stability of ore pillar safely.
【作者單位】： 武漢科技大學(xué)資源與環(huán)境工程學(xué)院;
【基金】：國家自然科學(xué)基金項(xiàng)目(編號:51574183)
【分類號】：TD853

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