矿山机电一体化对提高采矿效率的影响研究

矿山资源是国民经济发展的基础保障,也为诸多行业提供基础原料,因此它在社会经济发展中有着特殊的地位。当前,我国国民经济增长速度加快,对各类矿产资源需求量增加,如果还是采取传统矿山资源开采方式,其开采效率无法提升,也难以满足市场的需求,阻碍国家经济的发展。只有不断提升矿产资源采矿效率,提升矿产资源的供给量,才能实现国民经济稳定发展、保障人民群众生活需要。而科学技术发展中,机电一体化系统开始在矿山建设中使用,能够将传统人工操作的部分工作,使用机械化进行取代,从而提升采矿效率。本文通过对矿山机电一体化的特点阐述,分析了矿山机电一体化技术在提高采矿效率的应用,明确了矿山机电一体化对提高采矿效率的作用,总结了矿山机电一体化的发展趋势。     

采矿充填下的尾矿处置技术运用实践探究

随着时代的发展,我国的社会经济也在不断地发展,经济水平的持续发展使得我国对能源的需求急剧上升。其中,矿产资源是工业建设的重要资源保障,目前我国对矿产资源的需求已经到达一个较高的水平。因此,如何针对矿山建设的矿产资源开发进行管理,并结合现代化的采矿技术装备不断强化采矿出矿率水平已然成为当今矿山开采行业的重点工作。     

探讨采矿工程中的采矿新技术与施工安全

随着社会的发展和进步,我国对矿产资源的需求在不断增多。许多矿产资源都是不可再生资源,有广泛的用途。一些矿产不仅可以作为燃烧原料使用,还能提取纤维制作布料。为了满足人们对矿产资源的需求,矿山开采行业在不断发展和进步。在矿山开采的过程中,采矿新技术提升了矿山开采的效率,对矿山开采行业的发展和进步有很大的推动作用。     

薄矿层中连采机的设计方案探讨

我国能源储量丰富,但绝大多数矿产资源处于难开采区域,尤其是对于一些夹层和断层的矿产资源无法开采,而传统的采矿机存在设计弊端导致资源严重浪费,连续采矿设备的出现弥补了传统采矿设备存在的不足,同时也延长了矿山的开采年限。连续采矿机设备作为快速掘进及短臂开采的专用设备,超矮机身的设计可以用于薄矿层巷道的开采,机身高度可比掘进机设备低很多,因此,本文就矮机身的连续采矿机设计方案进行探讨,希望可以在全国范围内进行普及和推广使用。     

矿山综合机械化开采设备与开采工艺应用研究

矿产资源在开采过程中,开采工艺技术的水平直接影响到开采的效率,为确保采矿工作质量有效缩短采矿时间,提高开采的工作效率,需要在矿产开采过程中实行综合化的开采工艺,通过研究矿山综合化的机械采矿工艺,探讨矿山综合机械化采矿设备的支持和综合机械化工艺,综合机械化采矿结合全面一体化的机械化作业,矿山综合机械化采掘技术是矿山高产高效的保障,可以推动采矿行业的发展。本文主要根据目前矿山综合机械化采矿需要的设备和综合机械化采矿工艺,从矿山综合机械化采矿的实际情况出发,分析采矿工艺,更好的将其应用到矿产资源开采中,对综合机械化的采矿工艺进行分析总结,提出在综合机械化采矿工艺方面提高的主要措施,为提高企业经济效益提供参考。     

水文地质类型对地下矿产的开采影响

改革开放以来,我国社会经济发展迅速,矿产资源作为我国经济发展和建设的基础型资源,具有重要的战略意义和价值。资源的开发和利用促进了社会经济平稳发展,在科学技术快速发展的社会背景下,社会基础设施建设工程数量增多,对矿产资源的需求量也逐渐提升,社会的进步与发展离不开对矿产资源的开发与利用。在矿产资源开采过程中,矿山水文地质类型对采矿工作的效率和质量具有重要的影响,而很多矿产资源都分布在地形恶劣、水文环境复杂的地理环境中,水文地质类型的复杂程度决定着矿山开采工作的安全性。基于此,采矿企业应该重视加强矿山水文地质类型的分析和了解,在此基础上作出科学合理的采矿规划,加强水文地质类型对地下矿产资源开采的影响研究,不断提高采矿工作的安全性,对我国社会经济平稳发展提供源源不断的矿产资源。     

矿山机电设备电气断路故障的检测与维护

我国是矿产资源消耗大国也是矿产资源需求大国,这也促进了我国采矿事业的发展。随着科学技术的发展,矿山开采的机械化水平也越来越高,各种各样的矿山机电设备在矿山开采过程中得到了广泛的应用。矿山机电设备的使用可以有效提高矿山开采效率,也能减少矿山开采过程中人力资源的消耗。要想要充分发挥矿山机电设备的作用,就要求我们要及时对矿山机电设备进行故障检测,并定期对矿山机电设备进行设备维护,这样才能有效保证矿山机电设备的正常使用。接下来本文在研究过程中,就针对矿山机电设备的电气短路故障,对于短路故障的检测和维修方式进行具体分析。     

地理信息新技术在矿山测量中的具体应用

在国民经济高速发展中,对各类矿山资源需求量越来越多,促使更多企业开始参与到矿产资源开发利用中,以此加快狂才能资源的开采力度,导致我国矿产资源的枯竭。基于这种情况下,社会各个层面都在加大力度开展矿山测量工作,一方面,因大面积矿产资源开采,极易产生各类污染问题,也会造成地质灾害增多,威胁到矿产资源分布区域周围居民的生命安全,更加需要对矿产测量,才能有效对矿山资源开发利用过程进行监督管理。另一方面,市场对矿产资源需求量增大,更加需要对深部矿产资源进行勘探,促使各类矿山测量项目工作的开展,能够满足我国经济发展的资源需求。基于上述原因,都需要加快开始矿山测量工作,但是传统测量技术往往容易受到测量人员影响,也会受到各方面因素的限制,并且测量时间较长,无法满足当前矿山资源开发利用的要求。面对这种情况下,科学技术高速发展,为矿山测量工作提供了地理信息新技术,如GPS-RTK技术、全站仪、无人机遥感技术、惯性测量系统、卫星导航定位技术等,都可以很好满足当前测量工作的需要。因此,在矿山测量工作中,应当结合测量内容,科学合理选择使用地理信息新技术,有效提升测量工作效率和质量,逐步满足矿山资源开发利用的需求,以此推动我国矿山开采行业的可持续发展。     

矿山地质勘探中采矿特点及评价的意义

针对矿山企业采矿活动中矿产资源利用率不高的现象,提出矿山地质勘探中采矿特点及评价意义的分析。通过对矿山地质的成矿规律进行分析,结合矿产资源的赋存特点,采用合理的采矿技术和方法进行采矿活动,以减少采矿过程中的资源浪费现象。对地质勘探的各个环节进行准确评价,保证对矿山地质的矿产含量、赋存位置等信息作出正确的评价,提高矿产资源的合理利用效率。     

德兴铜矿矿山废水治理现状及其前景

德兴铜矿在采矿和选矿的过程中产生大量的废水。本文对德兴铜矿矿山废水治理现状进行了全面的分析,从生产实践出发对提高矿山治污能力、废水综合治理途径进行了探讨。     

The effect of amount of possession of the trait of hostility on accuracy of perception of hostility in others.

Some theories of personality hold that an individual's perception of others is influenced by his own personality characteristics; more specifically, that a trait of low social value will be projected more into others, and that insight into the possession of these characteristics reduces this distortion. These 2 hypotheses were tested by having a group of college students rate each other (including themselves) on degree of friendliness or hostility. Agreement with group rating about self yielded the insight score. In general, the hypotheses were supported; the "friendly" Ss were most accurate in their perception of others, and insight was positively associated with accurate perception. From Psyc Abstracts 36:04:4HL16M. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Comparison of rates of infection of two methods of emergency ventricular drainage

The rates of infection of two methods of external ventricular drainage in use at Atkinson Morley's Hospital--namely, (a) percutaneous drainage with Rickham reservoirs and (b) tunnelled ventriculostomies--were compared in this retrospective review. Percutaneous drainage of CSF with Rickham reservoirs was associated with a 27% rate of infection as identified by positive microbiological cultures; tunnelled ventriculostomy catheters had a 10% infection rate. The difference in the infection rate between the two methods was statistically significant (P < 0.015). Other variables examined, including the age and sex of the patients and the reasons for ventricular drainage, were not associated with an increased rate of infection. Most infections from either method were caused by a coagulase negative staphylococcus. The average duration of ventricular drainage before identification of positive cultures was 5.7 days for Rickham reservoirs and 6.0 days for ventriculostomies.     

浅析《野草》的版画特征

鲁迅先生一生热爱美术作品,对版画中木刻兴趣尤甚.<野草>作为其"写心之作",亦呈现出一些与木刻版画一致的审美特征:一是具有木刻版画的色彩特征,多对比、多冷色,有阴郁的美感;二是具有木刻版画的力度特征,环境描写、人物刻画处处刀锋毕现,遒劲有力,有一种"力之美".     

四辊破碎机车刀架的改造

针对四辊破碎机车刀架车削中存在的几个问题,详细介绍了电动车刀架的结构和工作原理,建立主要设计参数的数学表达式,并进行适当的分析。改造后,这种电动车刀架运行平稳、可靠、方便、省力,取得了预期的效果。     

转炉炉壳热应力分析

根据实际转炉建立实体模型。以有限元为手段,考虑了炉衬和炉壳材料的物性参数随温度变化的特点和炉衬与炉壳之间膨胀间隙,计算了转炉炉壳在温度载荷和炉衬膨胀压力同时作用下的热应力。所得结果可为转炉炉壳设计提供依据。     

Comparison of the results of surgical and conservative treatment of fractures of the diaphysis of the tibia

In this paper is treated the fundamental problematic of the fracture of the diaphysis of the tibia and the therapeutic results after the conservative and operative treatment are confronted. Among 518 patients with 433 open fractures and 35 with closed fractures of the diaphysis of the tibia, successful treatment of more 2/3 was obtained in the period from 1968 to 1972. Following our casuistics and literature, whose results are similar, we find out that the average total treatment of the osteosynthesis of the fracture of the diaphysis was shortened for 2,5 months depending upon the type and the localisation of the fracture. Apolied methods of the operative and conservative and conservative treatment in relation to the velocity of the medical cure as well as to the extreme anatomical-functional results are analised. We noticed that osteosynthesis, made by the intermedullary nail and the extension of the canals or by a small AO table, by the achieved stability makes conditions of immediate motions and an early rehabilitation. Because of that it gives the best functional results.     

焦炭热性能指标意义浅析

通过对焦炭在高炉内的历程及其变化规律的剖析,阐述焦炭热性能指标的意义,形象地把焦炭在高炉内的损耗分为三部分(M1,M2,M3)。指出M2对焦比及焦炭价格有一定的指导作用。     

Results of treatment of cancer of the cardia

Cancer of the cardia is traditionally discussed with cardiac cancer of the lower portion of the esophagus and upper gastric cancer invading the esophagus, and the specific characteristics of cancer of the cardia have never been clearly defined. We reviewed the outcome of 172 patients with adenocarcinoma of the cardia who had undergone radical surgery between 1949 and 1994 in the Division of Gastrointestinal Surgery of the Cancer Institute Hospital. The centers of the tumors were located within 2 cm above and below the boundary between the esophagus and the stomach, and their longitudinal diameter was less than 8 cm. We divided the patients into an early period (1949-1979; n = 79) and a late period (1980-1994; n = 93), and focused on the historical transition. There were no differences in patient gender or histology between the two periods. However, the late period was associated with fewer cases of esophageal invasion and shorter longitudinal diameter, as the age of the population advanced. The number of advanced cancers such as the localized and infiltrative type had decreased, and early cancer and early clinical stage had become more common, but despite the fact that the number of early cancers had increased, extended dissection, such as thoracic and paraaortic lymph node dissection, was performed more frequently. By clinical stage, the long-term outcome markedly improved in Stage I patient in the late period, and tended to improve in Stage II and III patients. This appears to have been attributable to the prevention of micrometastasis by extended dissection, although the number of early cancers is another major potential cause. There were no differences in the outcome of Stage IV patients between the two periods, and further advances in multimodality therapy must be awaited. The range of resection is basically proximal gastrectomy, and if there are adequate indications, the prognosis is favorable. In view of the status of lymphatic flow and lymph node metastasis, and long-term results, lateroaortic lymph node dissection is important. Since the number of early cancer patients has been increasing, if intraabdominal recurrence is prevented, intrathoracic lymph node dissection will contribute greatly to the outcome of such patients.     

参与式农业基地建设行动方案设计

为了编制实用性强的基地建设行动方案,首先,确定参与式发展的主体,搭建一个"决策框架";其次,针对行动目标,提出不同参与主体,如管理者、农民、消费者等团队与个人的目标及行动内容;最后,工作应向重塑伙伴式合作关系,挖掘农民自我发展潜力,完成三大角色的转换,打造农业基地文化等方向推进.