Compressed-air consumption by active-operation excavator shovel

Institute of Mining, Siberian Branch, Academy of Sciences of the USSR, Novosibirsk. Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 3, pp. 88–91, May–June, 1990.     

Evaluation of the specific energy consumption of a working process using an excavating machine with an active shovel

Institute of Mining, Siberian Branch, Academy of Sciences of the USSR, Novosibirsk. Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 4, pp. 63–68, July–August, 1991.     

电铲装载自移式破碎机工艺的应用

露天采矿工艺中,采煤工艺采用电铲-自移式破碎工艺在露天煤矿应用不多,还处于试验阶段,它的适用条件比较苛刻,一般要求水平煤层。白音华二号露天矿煤层有一定的倾角,在应用这套系统就会存在电铲向自移式破碎机装载物料时,出现电铲卸载高度满足不了自移式破碎机要求的高度的现象,针对此问题,结合现场及设备实际,从生产工艺方面提出了解决方案。     

浅析双侧折返入换装车法对电铲效率的影响

对特大型露天矿双侧折返入换装车形式及装车时间进行了研究。并以哈尔乌素露天煤矿为例,分析了双侧装车的实际效率,结果表明,双侧装车待装时间、装车时间均比单侧装车减少,使双侧装车电铲效率比单侧装车提高了23.38%。     

改变作业参数提高电铲装车效率

从电铲台年产量和主要生产参数入手,分析了采掘带宽度和效率的关系,确定了采掘带的最佳宽度,运用该方法完成了在用电铲采掘带的技术改造,对降低剥采成本具有重要意义。     

Modelling,analysis and preliminary studies for automatic scooping/loading in a mechanical loader

ABSTRACT

A fundamental step of process analysis and modelling for the scooping and loading function of a loader type excavating machine is carried out. This is a part of the essential work towards automation of such a machine. Emphasis is given here to Load-Haul-Dump mining machines, frequently used in underground mining operations. However, for many other applications, such as remote excavating and contaminated soil removing with a loader type excavator, the same theory applies and the same sort of experimental work becomes necessary. In this work the loading gear is first modelled as a mechanical manipulator, then the nature of the involved resisting forces, that also depend on the properties of the material to be loaded, and the fact that some knowledge about these stochastic forces is required, is pointed out. The paper, moreover, presents a discussion about the more appropriate trajectory of motion of the loader bucket.     

Dump truck operator vibration control in high-impact shovel loading operations

The shovel-truck system is used in surface mines due to its flexibility, low-cost operations, maintainability and multi-face operating capability. Technological advances have resulted in large shovels and trucks for bulk, economic operations causing high-impact shovel loading operations (HISLO). The resulting HISLO impact forces cause significant vibrations, which are transmitted through the truck frame into an operator's cabin. Long-term exposure to these vibrations could cause lower back injuries, spine injuries and other musculoskeletal diseases. Previous research has focused on truck dynamic simulation using multi-body dynamics and finite element method within the haulage segment of the production chain. This article focuses on truck vibrations in the dumping process. Mathematical models are developed to capture the vibration response of an integrated operator–machine–material system. Virtual prototype models are developed to simulate the response of the integrated system suspension to vibrations in MSC.ADAMS. The results affirm the ineffectiveness of current suspension mechanisms to eliminate shock wave propagation into the operator's cabin during dumping, with adverse impact on operator's safety and health.     

装药车制乳化炸药配方的优化研究

本文根据装药车及乳化炸药的国内外发展现状,分析当前装药车制乳化炸药作功能力偏低、炸药粘度大的影响因素;从装药车用乳胶基质的制备、装药车制乳化炸药配方优化设计等方面开展一系列研究,确定了装药车制乳化炸药生产最佳配方。     

运用系统思考方法分析电铲行走机构故障

4 m3电铲的机械故障集中表现在行走和回转机构,尤其是行走机构故障最为突出,以往针对某一部位进行治理,效果很不明显。现在运用系统思考的方法对行走机构故障进行分析,提出系统解决方案,建议矿职能部门,对现有使用和检修制度进行改革,提高电铲检修质量和运用水平。     

基于爆破块度的地下金矿钻爆及铲装成本优化

某地下金矿目前已经进入开采阶段,为降低开采过程中钻爆和铲装成本,有必要对爆破块度级配进行优化研究,并得到较合理的上向扇形炮孔爆破块度,从而优化爆破参数。对某地下金矿目前正在爆破回采的不同采区进行铲装时的爆堆拍照,对相应爆破参数下的钻孔数量和炸药用量、铲运环节等成本资料进行收集,并运用Split-Desktop4.0软件,得到不同采区的钻爆与铲装成本与平均块度的关系公式,建立成本模型。成本模型结果显示：基于钻爆与铲装环节的某地下金矿经济合理爆破块度区间为21～24 cm,对应的主要爆破参数为：孔底距约1.9 m,排距约1.5 m,孔深5～14 m。研究结果节约了矿山的生产成本,提高了生产效率,为相关研究补充了理论依据。创新点：将计算机爆破块度分析软件,运用在矿山生产成本优化中,并以此为出发点,探究对应的合理爆破参数,为相关研究提供新思路。     

煤矿用铲装式装载机在南屯矿的应用

使用一种煤矿用铲装式装载机配合转载架与SSJ-800胶带输送机机尾搭接,形成连续出矸系统,取代了槽式耙装机与矿车相结合的出矸方式,在进行出矸时达到连续性,减少了因岗位工种、矿车供应等环节造成的影响。能够对巷道底板局部超高范围进行破底,大大降低劳动强度。     

工字钢巷道掘进机机载支护装置的设计与应用

工字钢巷道掘进机机载支护装置适用于煤矿工字钢支护巷道,该装置安装在EBZ100掘进机主钻截割臂上,可用于巷道空顶的保护与工字钢的托举.该技术能够较好地适应于各种顶板条件,结构简单,使用方便,安全性能好.     

对爆破用装药器结构的设计与改进建议

装药器属于爆破用移动式输送炸药设备。针对目前常用的具有搅拌器装置的装药器,文章着重对其设计、制造、使用与管理提出了一些改进建议,望专家共商。     

Operator and dipper tooth influence on electric shovel performance during oil sands mining

A shovel performance monitoring study was undertaken in two oil sands mines operated by Syncrude Canada Ltd. using performance data obtained from P&H 4100 TS and BOSS electric mining shovels. One year of shovel performance data along with geological, geotechnical and climatic data were analysed. The approach adopted was to use current and voltage data collected from hoist and crowd motors to first identify dig cycles and then to calculate the energy and/or power associated with digging. Analysis of performance data while digging uniform material along with operator team schedules showed that the performance of a shovel can vary significantly depending on which operator is digging. Up to 25% variability in hoist power consumption and 50% variability in productivity was noted between different operators. Shovel type and dipper teeth configuration can also influence the power draw on electrical motors during digging.     

ELMB-75A掘进机装载机构的改进

通过对掘进机装载方式的改造，使其提高装载效率及加快掘进速度。