Simulation of robot mining technologies

Conclusions 1. Petri networks are effective in the simulational modeling of the dynamics of multioperational mining technologies with automatic and robot equipment.2. The simulational-modeling system developed permits the solution of problems that do not yield to analytical methods: multicriterial choice of a technological system; spatial and temporal coordination of technological operations; reducing the idling time of equipment; estimating the viability of technologies; and choosing control methods and algorithms for automated and robot equipment.Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 2, pp. 41–49, March–April, 1995.     

射流流膜选矿

本文提出了—种新的微细物料连续排矿离心分选过程——离心射流流膜分选过程,并讨论了该过程的分选原理。新过程以高压水射流强冲击力、强离心沉降力和拜格诺力所组建的瞬变联合分选力场为基本特征。该力场中的瞬变脉动流膜不仅具有强化沉积粒群松散和分层作用,而且其所形成的“水力堰效应”可保证超细颗粒的回收,从而显著地提高薄流膜的分选效能。试验结果表明,锡石分选粒度下限为3微米。     

Shock-pulse transmission on driving metal tubes into the ground

Conclusions Analysis of the energy distribution in the transmission of a shock pulse to a metal tube through an intermediate element shows that the efficiency coefficient k_ef, the ratio of the energy in the head of the transmitted pulse to the impact energy, depends on parameters such as the mass and rigidity of the intermediate elements, the magnitude of the added mass, and the tube rigidity. If a circular plate is used as the intermediate element, then k_ef increases with increase in plate thickness until it is 0.2 of the tube diameter. Further increase in the plate thickness leads to increase in energy dissipation uncompensated by reduction in the striker recoil coefficient. The presence of an added mass reduces k_ef, on account of increase in both the energy dissipation and the recoil of the striker. Increasing the tube rigidity — for example, by increasing its cross-sectional area — reduces the efficiency of shockpulse transmission as a result of increase in the striker recoil coefficient and increase in the proportion of energy in the oscillating tail of the elastic pulse. It remains to thank E. N. Sher for useful discussions of the experimental results. Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk. Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 1, pp. 89–97, January–February, 1998.     

虚拟仪器在悬臂梁固有频率测量实验中的应用

将虚拟仪器技术应用于悬臂梁固有频率的测量实验 ,组成了基于虚拟仪器的实验仪器系统。详细介绍了虚拟仪器硬件、软件的构成 ,开发了基于LabVIEW的测量程序 ,在实验教学中取得了较好的教学效果     

发展中的河南煤矿深井冻结凿井技术

冻结凿井法是矿井通过厚表土层和不稳定含水层施工的主要方法。20世纪90年代以来，河南煤矿的冻结凿井设计和施工技术得到了快速发展，取得了较好的技术经济效益，深井冻结中有待探讨和解决的问题较多，需要在实践中研究突破，使河南冻结凿井技术再上一个新台阶。     

Regularities of acoustic emission and thermoemission memory effect in coal specimens under varying thermal conditions

The experimental data on acoustic emission regularities are presented for specimens of different genetic coal types exposed to a wide range of cyclic heating modes. Peculiarities of formation and manifestation of thermal-emission memory effect depending on amplitude and duration of the thermal-field action are revealed. __________ Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 4, pp. 61–70, July–August, 2007.     

Estimation of the required amount of hydrological exploration in lignite mining areas on the basis of hypothetical hydrogeological models

Mine drainage is a necessary but very costly precaution for open-pit lignite mining in sandy aquifers. Consequently, the minimization of the number of drainage wells and their optimal operation become important tasks in designing mine drainage systems. Comprehensive groundwater flow models have to be used, both, for the design of drainage wells, and for the analysis of water management strategies in mining areas. The accuracy of computations with such models depends on the precision of the underlying hydrogeological informations. In order to get these informations detailed and costly hydrogeological explorations have to be done in the mining regions. The basic informations are obtained using exploration drilling. The cost for hydrogeological exploration are approximately a linear function of the number of exploration bore holes. Therefore the reduction of drilling gets a key role in reducing costs of exploration. This might be done by:

- increased use of geophysical exploration methods,

- complex analysis of exploration results using mathematical statistical methods,

- precise estimation of the required amount of hydrogeological informations.

The paper describes a mathematical approach to support the complex decision making procedure of estimating the optimal amount of hydrogeological exploration with respect to a given mine drainage goal.     

应用灰色关联分析法评价瓦斯爆炸事故危险源

基于安全工程学原理和现场调研，针对矿井瓦斯防治现状，提出瓦斯固有危险源概念，认为瓦斯涌出量、瓦斯压力具有瓦斯固有危险源特征；瓦斯涌出量在一个考察周期内，变化属于非线性问题，瓦斯固有危险源具有非线性动力特征；瓦斯诱发危险源对固有危险源影响以及固有危险源和诱发危险源这些因素之间的相互关系可用灰色关联分析。采用瓦斯涌出量、风量、瓦斯浓度等参数，运用灰色关联分析实例分析巷道瓦斯危险源风险程度，对现场防治瓦斯爆炸有一定参考价值。     

硫粗精矿提质降杂试验研究

云南文山都龙多金属矿分选难度大,硫粗精矿中砷和杂质含量高,严重影响企业经济效益。在对硫粗精矿进行工艺矿物学研究的基础上,采用“磁选—深度细磨—浮选”的联合工艺对硫粗精矿进行提质降杂试验研究,并对锌进行回收。所得硫精矿中S、Zn、As品位分别为36.66%、2.72%、0.63%,其中S的回收率为75.73%,锌精矿中Zn品位为40.68%,回收率为52.63%。硫精矿的质量明显提高,提质降杂效果明显,同时还实现了锌的回收。     

边坡稳定性研究综述

介绍了边坡稳定性研究中的基础理论和分析方法，综合评述了这些分析方法的特点和不足，并着重探讨了在边坡稳定性分析中的数值分析法和可靠度法今后的研究方向及发展趋势，有助于边坡稳定性研究工作的开展。