介绍了屯兰矿多绳摩擦式提升机安全高效换绳工艺,详细讨论了前期的准备工作及具体操作方法.应用结果表明,该工艺安全可靠性高,节约工期,换绳过程基本无风险,对于同类设备的钢丝绳更换工作具有一定的参考价值.

This paper introduces authority application for management system of power supply network in coal mine based on JSP and Oracle, made the system needs analysis, designed and selected thesystem scheme, and the system database, completed the system code, debugging, testing etc.. The results show that after the system testing, the power supply management of coal to meet the new situation demands.

Roof control is very important for thin seam mining. The support strength of the mining area must ensure complete roof, and more importantly, must control substantial roof subsidence and maximize the effective mining area at the ultra thin seam. The Support is hyperbolic curve related to the surrounding roc, that means as the support strength increases, the roof subsidence decreases, however, when the support-ing strength increases to a certain extent, there exists a subsidence increase limit, therefore, the increased supporting strength will lead to in-creased support weight and thickness, which in turn decrease the effective space in the ultra thin seam. Therefore, the study of the quantitative relationship between support and surrounding rock under specific engineering geological conditions, to determine the extent of permitted roof deformation and the control over roof subsidence is a very important topic for fully mechanized mining at ultra thin seam.

介绍了屯兰矿南二强力胶带由直接启动改进为变频驱动技术的必要性、改造的设备选型,及变频驱动技术应用后与该矿现有驱动装置相比较的优势,为类似胶带机的改造提供了可靠的技术经验。