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利用神经网络预测回采巷道的维护费用 总被引:1,自引:0,他引:1
本文提出了预测回采巷道维护费用的一种新方法,即人工神经网络预测法。该方法以大量的实际例子为学习样本,让网络学习,以建立各种回采巷道的特征与对应的巷道维护费用之间的非线性映射,再根据待预测的回来巷道的特征,预测出其维护费用。文中给出的例子的计算结果,说明了此方法是切实可行的。 相似文献
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The results of experimental studies about the characteristics of broken rock expansion and reconsolidation were briefly introduced in this paper, and the surface subsidence coefficient under critical mining conditions was also analysed based on the principle of expansion and reconsolidation of the broken rock strata, a equation to calculate the corresponding surface subsidence was finally produced. This calculation method can be used to calculate more accurately the convergence quantity of consolidated rocks in the broken zone of the working face. In addition, case analyses by using the introduced calculation method were conducted and satisfactory results were obtained. 相似文献
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夹层对层状岩体稳定性的影响分析 总被引:13,自引:5,他引:13
在对层状岩体结构及力学特性分析的基础上,将含夹层岩体视为一个完整的力学系统,建立了含夹岩体组合系统力学模型,揭示了含夹层岩体的破坏及失稳机理,并研究确定出含夹层岩体稳定性的判别指标,为层状岩体稳定性的控制设计提供了依据。最后,通过一工程实例分析了确定含夹层极限厚度的方法以及提高系统稳定性的措施。 相似文献
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The application of destressing method can change the distribution patterns of the stress field in the weak rock surrounding openings, locate the openings in the zone of low stress level, thus improve their loading and maintaining conditions. Such method is considered as a new way of opening maintenance in weak rock and has caused extensive interests in mining industry both at home and abroad. The results of theoretic research and lab experiments of utilizing topdestresslng trough to maintain the opening affected by mining activities in weak rock, as well as its practical application in a coal mine are introduced in this paper. The research results indicate that the deformation and floor heaving of the opening in weak rock can be effectively controlled, and long-term stability of the opening can be realized by applying destressing method as long as the destressing plan and concerned parameters are carefully determined. 相似文献
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八、U型钢可缩性支架连接件U型钢可缩性支架的节与节搭接处依靠连接件使之卡紧,在型钢接触面上产生一定大小的预紧力(锁紧力),当型钢相对滑移时,接触面上就产生一定大小的摩擦阻力。支架承载后收缩时,由于搭接处不同曲率的支架节之间的相对错动,以及连接件的歪扭变形,会在接头处产生附加压紧力和引起附加摩擦阻力。由预紧力和附加压紧力所引起的接头阻力就形成了支架的实际工作阻力。因此连接件的结构和力学性能将直接影响到可缩性支架的实际工作特性。目前,国内外用于U型钢可缩性支架的连接件有十余种,这些连接件在结构及力学特性上各有特点。 相似文献
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洁净煤技术中的应用研究及发展目标 总被引:5,自引:0,他引:5
介绍了中国矿业大学在洁净煤制备、煤炭干法分选、煤的洁净燃烧、煤炭废弃物加工利用和煤炭地下气化等洁净煤技术方面取得的一系列的研究成果,并提出了发展洁净煤技术的近期和中长期研究目标。 相似文献
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软岩巷道支架壁后充填与围岩关系的研究 总被引:10,自引:4,他引:10
支架的高阻和可确保软岩巷道稳定性的关键,受力条件恶凶制着软岩巷道支架支撑能力的发挥,实施支架壁后充填使支架及早承载和均匀受力,可大幅度提高支架的工作阻力,有效地控制巷道围岩地强烈变形, 相似文献