岩金矿山级差品位指标的探讨

在分析岩金矿山开采特点的基础上，把矿山开采划分为开拓、采准、备采和存窿放矿4个阶段，相应的形成开拓矿量、采准矿量、备采矿量和存窿矿量．各阶段所投入的费用和劳动消耗逐级累积增加，而相应的各阶段则逐级减少．相应各阶段生产矿量的最低工业品位要求逐级降低．所需求的最低工业品位只担负偿还该阶段及以后为开采它所需的费用和劳动消耗．提出建立岩金矿山生产矿量级差品位指标系列和计算公式，来不断研究、分析、衡量开采矿块（块段）所处的生产阶段，确定它的经济价值和资源利用程度，指导矿山采准、采矿、出矿、配矿的生产，达到提高矿山企业经济效益，充分利用资源，延长矿山服务年限的目的．     

基于物联网的矿山智能化管理系统

我国是矿资源大国,拥有着多座矿资源丰富的矿山。随着矿资源不断的被开采,矿山管理的诸多问题呈现出来。因此,提出基于物联网的矿山智能化管理系统对矿山进行智能化管理。通过智能化管理系统设计、物联网矿山智能化管理系统的实现,完成了基于物联网的矿山智能化管理系统的设计。应用物联网技术大大增强了矿山系统的智能性和友好性,试验数据表明,符合矿山的发展趋势。     

基于3Dmine矿业软件的露天矿山采剥计划的数值模拟

为研究露天矿山采剥计划年矿岩总量和矿石量,以某露天金属矿为研究背景,依据锥体排除法生成最优地质开采体,运用动态规划理论对最优开采体进行经济评价,以3Dmine为载体建立采剥计划模型对矿山生产进行数值模拟,并与矿山6年的实际生产数据进行对比分析。研究表明:模拟结果与矿山的实际生产数据基本吻合,运用该模型为矿山预测未来5年的采剥计划。模型得到的采剥计划对该矿山的生产有一定的参考价值,并对其他矿山有借鉴意义。     

进路分层分条回采分层崩落法在云南镇沅金矿的试验应用

云南黄金有限责任公司镇沅分公司是一座露天与井下联合开采的岩金矿山,井下生产规模300 t/d,产品为浮选金精矿。矿山采用平硐-溜井开拓方式,中段高度40 m,井下主要集中在对冬瓜林矿段的SⅡ2矿体进行回采。该矿体为占冬瓜林矿段总储量的60%以上,但其开采技术条件复杂、矿岩非常破碎,属难采矿体。试验前采用常规的分层崩落法回采,造成了采矿能力低、采矿损失贫化大和生产成本高等突出问题。近年来,进行了进路分层分条回采分层崩落法的试验研究及生产应用。在此期间,采场共采出矿量11 729 t,出矿品位5.45 g/t,采矿损失率5.01%,矿石贫化率7.89%,获得了较好的技术经济指标。     

南矿地表移动变形影响及保安矿柱开采安全分析

对锡矿山南矿地表及井下岩移进行了观测研究,利用不同手段判断地表移动的变形量,从而了解充填质量和保安矿柱安全开采的情况,结合本矿山实际情况,利用观测数据来确定采空区上部建筑物的稳定性。     

深埋藏锌多金属矿床开拓方案的选择

随着中国社会的不断进步和发展,对资源的开发与利用更加的科学化、合理化、智能化和绿色化。我国目前依然处于工业化和城镇化的发展阶段,对金属资源有一定的需求。对于埋藏较深的锌多金属矿床的开发与利用显得尤为重要,合理的开拓方案更是重中之重,开拓方案的选择涉及到基建期工程量、矿山建设投资及矿山投产的时间。综合矿体的赋存条件、基建投资、经济效益等多方面因素,对该矿两个矿区同时建设或接续开采、对一矿是否分期开采进行了充分的论证与分析,为同类矿山提供参考。     

无底柱分段崩落采矿法在武钢地下铁矿中的应用实践

无底柱分段崩落采矿法是否适用于松软破碎矿体,一直是采矿界争论的焦点。武汉钢铁(集团)矿业有限责任公司所属地下矿山采用该采矿法的生产实践表明,矿岩条件复杂的矿山。只要因矿制宜、灵活应用无底柱分段崩落采矿法的开采原则,不断改进与完善结构参数,采用一些适应自身矿岩条件的生产工艺技术,同样能达到硬岩矿体的开采效果。     

岩金矿山采空区处理技术探讨

岩金矿山以浅眼留矿采矿法为代表的空场采矿法作为主要开采手段，约占50％，每年形成数百万立方米采空区，并绝大多数未进行专门处理。本文介绍数例岩金矿山采空区处理方法及效果，并对新型采空区处理技术作了简略介绍。     

金川矿山深井岩石力学问题研究构架

金川矿山由于其极其复杂的区域地质背景、特殊的工程地质环境以及碎胀蠕变的岩石力学特性,倍受国内外采矿工程界和岩石力学界学者和专家的关注。目前。金川矿区开采已进入深部开采阶段。随着矿山采掘强度的逐年迅速加大,采场开采深度的增加,地应力增大,加之开采范围扩大,矿山深部岩石力学问题日趋突出。重视金川矿山深部岩石力学问题的研究工作,建立深部矿山岩石力学研究体系,进一步研究深部矿岩工程力学特性和认识深部矿岩所处的地质背景,寻求金川矿山深部围岩更趋合理的稳定性控制技术,为矿山高效安全生产和可持续发展提供技术支持。     

露天矿山转井下开采覆盖岩层形成技术的研究与应用

在露天矿山转井下开采过程中,为了保证矿山安全生产,必须在露天矿底部首先形成覆盖岩层。本文从覆盖层作用及安全要求进行了分析研究,以承德黑山铁矿露天转井下开采工程为例,介绍了覆盖岩形成的主要方法和实际效果,对同类矿山覆盖岩层的深入研究起到了参考意义。     

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.