煤矿机电运输设备安全运行的技术措施

煤矿机电运输设备的安全运行关系到煤矿生产的安全,因此,有必要对机电运输设备安全运行的技术措施进行深入探讨。本研究主要阐述了煤矿机电安全技术措施、轨道运输安全技术措施等问题,希望给煤矿安全生产带来一定的参考。

下运带式输送机液压制动器性能研究

介绍了下运带式输送机液压制动器的制动原理、分析了其工作性能 ,重点讨论了液压制动器在制动、松闸和运行过程中油液压力的确定 。

Fundamental behaviours of production traffic in underground mine haulage ramps

Ramps(or declines) are often used in underground mines to transport ore, waste, materials, and personnel. This paper studies mine ramp productivity and presents results from a set of computer simulations designed to model the fundamental behaviours of ramp haulage systems. Simulations show that, under fundamental assumptions without random disturbances, the haulage system always converges to a periodic behaviour in the steady state, but that productivities vary between equilibria. Simulations also demonstrate how productivity per vehicle does not necessarily decrease as more vehicles are added and,for example, in the five-vehicle case, how a 3.1% improvement can be achieved over the use of four vehicles. The result reveals the inefficiency of commonly-used lockout-style vehicle coordination strategies,and suggests a possible avenue for improving the productivity of haulage ramps by controlling the system to achieve more productive behaviours.

架线电机车逆变器控制的供电电源设计

架线电机车是煤矿生产运输的重要交通工具之一。传统的电机采用直流供电系统，没有调速装置，把直流电机置换成交流电机采用逆变器控制实现变频调速，极大改善了系统机械特性，调速是无极连续的。在这里存在着如何提高逆变器的工作稳定性问题，供电电源是其中的重要因素之一。