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首页> 外文期刊>Transactions of The Institution of Chemical Engineers. Process Safety and Environmental Protection, Part B >A novel failure control technology of cross-measure borehole for gas drainage: A case study
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A novel failure control technology of cross-measure borehole for gas drainage: A case study

机译:气体排水横梁钻孔新型故障控制技术 - 以案例研究

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摘要

Chinese coal mines, which are generally of complex mining conditions, are threatened by serious coal and gas outburst and explosion accidents. Cross-measure borehole (CMB) gas drainage is one of the widely applied prevention measures, but, unfortunately, it faces some serious problems such as low gas concentration, low gas flow rate and short effective drainage period. Thus, in this study, a new in-situ failure control technology that uses fine particles to seal leakage fractures around the CMB was proposed to improve the gas drainage effect. Based on the geological background in Luling coal mine, this new technology was researched in detail. First, an air-leakage network model was established for the CMB gas drainage, and the results reveal that the gas pressure and the characteristics of leakage fracture around the borehole notably affect the gas concentration. Then, based on the in-situ failure control technology, a pneumatic conveying experiment was performed to investigate the blockage characteristics of particles in narrow straight fractures, and the optimal blockage parameters, including conveying pressure, particle mass flow rate, air flow rate and blockage particle size, were obtained for engineering application. Finally, reasonable schemes for gas drainage were designed and implemented at the new and old drilling fields to evaluate the effect of this technology.
机译:中国煤矿通常是复杂的采矿条件,受到严重煤炭和天然气突出和爆炸事故的威胁。交叉测量钻孔(CMB)气体排水是广泛应用的预防措施之一,但遗憾的是,它面临着低气体浓度,低气体流速和短暂的有效排水期等严重问题。因此,在本研究中,提出了一种使用细颗粒来密封CMB周围密封漏裂缝的新的原位失效控制技术,以改善煤气排水效果。基于Luling Coamine的地质背景,详细研究了这项新技术。首先,为CMB气体排水建立了空气泄漏网络模型,结果表明,气体压力和泄漏骨折围绕钻孔的特性显着影响气体浓度。然后,基于原位破坏控制技术,进行气动输送实验,研究窄直骨折中颗粒的堵塞特性,以及最佳阻塞参数,包括输送压力,粒子质量流量,空气流速和阻塞粒径,用于工程应用。最后,在新的和旧的钻探领域设计并实施了瓦斯排水的合理方案,以评估该技术的效果。

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