共查询到19条相似文献,搜索用时 82 毫秒
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本文根据球齿和柱齿钎头的技术特点与破坏特征,详细论述了两种钎头的各种先进固齿方法。通过在爆固式锚杆超前支护中的应用研究,分析和探讨了各种固齿方法的特点与适应性,并对其发展趋势进行了展望。 相似文献
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对传统刃片状和球齿钎头实现了扬长避短的“飞龙”φ42-4P1C锥体连接复合钎头,配合使用强度和耐磨性均佳的新型G308,YJ2.1R凿岩硬质合金,其使用寿命为我国目前广泛流行的锒YG11C合金片的φ40,φ42一字形钎头的3倍以上,是具有显著高效,低耗特点的换代产品。 相似文献
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根据矿山工业考核,针对应用最普遍的Φ40mm球齿钎头在设计、生产、使用中暴露出的问题,侧重其几何结构参数方面,提出了两种比较适合沉底式感应钎焊固齿工艺和我国材料与钎具工业现状的布齿方案,希望对促进小直径球齿钎头的进步和进一步开拓国内外钎具市场有所裨益。 相似文献
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目前,我队使用的东风31型电动凿岩机,与其配合使用的钎头有马蹄形、斜假形、厚刃形一字钎头和苏式老一字钎头、五齿球齿钎头,直径都为40毫米。在实际生产凿岩工作中,均存在不少问题。我们认为,这与这些钎头的几何结构和参数以风动凿岩机工作参数为设计依据有很大关系。所以,有必要对钎头进行研究试验,设计出适用于电动凿岩机的新型钎头,达到提高钎头寿命和钻速的目的。本文将对各种钎头使用中存在的问题,提出初浅的看法,和大家商榷。 相似文献
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采用沉底式感应钎焊固齿的φ40毫米三、四、五齿、φ42毫米五、六齿球齿钎头,以及φ40毫米三刃形钎头,是结合我国国情研制的新产品。以此为基础,又衍生12个品种,即φ32、φ34、φ36、φ38毫米三、四齿球齿钎头和φ32、φ34、φ36、φ38、φ42、φ44毫米三刃形钎头。这些新型钎头产品,在直径系列、几何结构参 相似文献
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Electro hydraulic drillers have been widely used in mining for drilling and roof-bolting. In the drilling process, the performance of the machine is predicted by selecting an appropriate bit type prior to drilling operations. In this paper, a series of field drilling studies were conducted in order to examine and compare the performance of chisel and button bits including wear on the bits. The effects of taper angle on chisel bits, which are at angles of 105°, 110° and 120°, were investigated in terms of rate of penetration, instantaneous drilling rate and specific energy. The results of drilling and abrasivity tests performed in the laboratory supported the outcome of the field studies. Based on laboratory studies and field observations, it was proven that the conglomerate encountered, though it is very abrasive, is easy to drill. The cutter life in the encountered series is also longer in sandstone formation compared to the conglomerate. Additionally, button bits resulted in lower specific energy and higher penetration rates relative to chisel bits, regardless of their taper angles. The results were also supported with statistical analyses. 相似文献
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新型打滑地层钻头的研究 总被引:1,自引:1,他引:0
钻探施工中,经常遇到打滑地层,为了解决打滑地层钻进难题,国内外专家设计了不同类型的金刚石钻头,但都有一定的局限性.金刚石增强型硬质合金复合齿钻头保证了切削齿具有良好的自锐能力、切削齿与岩石接触面的比压大等特点,从本质上提高了钻头对打滑地层的适应性.室内微钻试验表明,金刚石增强型硬质合金复合齿钻头钻进打滑地层时具有高时效的优点. 相似文献
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The Cerchar abrasivity index (CAI) is one of the most widely known index method for identification of rock abrasivity. It is a simple and fast testing method providing reliable information on rock abrasiveness. In this study, the relationships between the CAI and some rock properties such as uniaxial compressive strength (UCS), point load strength, Brazilian tensile strength and Schmidt rebound hardness, and equivalent quartz content (EQC) are examined. The relationships between the CAI and drill bit lifetime is also investigated and the type of drill bit wear observed is mentioned. Additionally, the CAI is modeled using simple and multiple linear regression analysis based on the rock properties. Drill bit lifetime is also modeled based on the CAI. The results show that the CAI increases with the increase of the UCS, point load strength, Brazilian tensile strength, L-type and N-type Schmidt rebound hardness, and the EQC. It is concluded that the higher and the lower bit lifetime are obtained for marl and andesitic-basaltic formation, respectively. Moreover, flushing holes, inserted button, button removal, and failures of button on the bits are determined as the type of drill bit wear. The modeling results show that the models based on the UCS and the EQC give the better forecasting performances for the CAI. 相似文献