通风模型在掘进的应用和加拿大煤炭资源在社会和政治上限制的影响 毕业论文外文翻译.doc

附录aventilates the model in the tunneling application with canada coal resource the influence which limits in the society and politics the extraction of minerals and coal at greater depth, employing higher-powered machinery to increase production levels has imposed an increased burden on ventilation systems to maintain an acceptable working environment. a deterioration in the climate experienced within these workings may also adversely affect the health and safety of the workforce. in the uk, mineral extraction is now being practiced at depths of over 1000 m. in addition, the adoption of continuous miner and tunnel bolting support methods has permitted improved development rates to be achieved at the cost of increased emissions of dust, gas and heat and humidity. there is a recognized need to improve the efficiency in the design and operation of auxiliary ventilation systems to maintain an adequate underground environment and climate. any improvement achieved in the quality, quantity and control of the delivered ventilation will assist in the provision of improved gas and dust dilution and climatic control. due to the constraints imposed by the mining method, there may be an economic or practical limit to the climatic improvement that may be obtained by the sole use of ventilation air. where this limit is identified, there may be the need to consider the selective application of air-cooling systems. the paper details the construction of a computer based climatic prediction tool developed at the university of nottingham. this work builds upon earlier research (ross et al., 1997, proceedings of 6th international mine ventilation congress, sme, littleton, co, pp. 283288) that developed a prototype model for short tunnel developments. the current model predicts the psychrometric and thermodynamic conditions within long rapid development single entry tunnel drivages. the model takes into account the mass and heat transfer between the strata, water, machinery and the ventilation air. the results produced by the model have been correlated against ventilation, climatic and operational data, obtained from a number of rapid tunnel developments within uk deep coalmines. the paper details the results of a series of correlation and validation studies conducted against the ventilation and climate survey data measured within 105s district tail gate tunnel development at maltby colliery, uk. the paper concludes by presenting the results of a case study that illustrate the application of the validated model to the design and operation of an integrated mine ventilation and cooling system. the case study illustrates the effect that an increased depth and hence increased virgin strata temperature has on the climate experienced within rapid tunnel developments. further investigations were performed to identify the optimum cooling strategy that should be adopted to maintain a satisfactory climate at the head of the drivage.a coal resource estimate should reflect the wealth that coal endows to the land within which it occurs. it forms the basis for long term public and commercial planning in areas such as future coal supply possibilities, and land use options. coal beds occur in a variety of forms and amounts in most sedimentary basins in canada. coal bed thickness, depth form surface, geographical location and coal quality are primary indicators of a deposits potential utility exploitation of some coal deposits is currently unfeasible for economic and/or technological reasons associated with the nature of their occurrence. some of these deposits may become viable sources of coal, or coal-derived products, in the foreseeable future as technologies advance and economic conditions change. other deposits, such as those that are extremely deep or thin, have no imaginable future utility and are not included in estimates of the nations coal resources.most of this report focuses on canadas coal resources of immediate interest (refer to chapter 2). additional large quantities of coal that might be exploited in the foreseeable future given more favourable economical, technological, and/or statutory conditions are classified as coal of future interest.resources of future interest generally consider coal that are less than 60cm thick (with the exception of resources in new brunswick, where thinner beds are currently mined), occurring at depths that are greater than 600m from surface, (with the exception of resources in nova scotia, where mining to much greater depths is currently planned). for relatively thin coal beds to be considered resources of future interest where underground mining is the likely coal extraction method, they must contribute to a minimum aggregate thickness of 1.5m with other beds in close proximity. this is often referred to as a coal zone or mining zone.coal is the most abundant fossil in canada and in the rest of the world.it currently represents about 14 per cent of canada/s primary energy economy. this is nearly the same as the combined contribution of hydro- and nuclear generated electricity in 1986,the value of coal production in canada surpassed that of all other mineral commodities with the exception of petroleum and nature gas.coal is not a singular homogeneous substance-it com prises variable amounts of different components,which can give it diverse properties.the character of coal is related mainly to original types of peat-forming vegetal debris,environments of deposition,degree of organic maturation,and mineralization .the occurrrnce of potentially exploitable coal is related to a variety of geological factors.although coal is abundant in canada,deposits,which vary significantly in geological complexity,are widely distributed and contain coals of diverse rank,composition and properties.the geological survey of canada is establishing a national inventory of coal resources in collaborztion with coal companies,universities,and provincial and federal government agencies.this inventory provides the basis for the purposeful management of the nation/s coal resources,and is essential for considering effectively canada/s future energy options. this compendium is intended to reflect the geological survey canada/s current knowledge of the nation/s coal resources. it updates previous coal resource summaries published by the government of canada,with particular reference to cosl resources and reserves of canada that was released in 1979 unlike some previous publications, however ,which summarized both national coal publications,however ,which summarized both national coal resource and reserve potential, this compendium focuses,resources,with particular attention to the nation/s presently undeveloped coal potentialorganic matter occurs in variable amounts in most sedimentaty rocks.it originates as animal or vegetal debris,and is fossilized in appropriate geological and geochemical environments.its presence is essential for the formation of coal and hydrocarbons.it undergoes progressive diagenesis under the influence of geothermal conditions that are mainly related to depth of burial.although coal exploitation can significantly contribute to the nations wealth and resulting standard of living, it can also cause major social and environmental disturbances. the potential of a coal deposit is a matter of public concern. these concerns are usually addressed by government coal leasing policies and various regulations that govern possible coal deposits are excluded from possible future exploitation as a result of these constraints.coal deposits that occur within urban areas (e.g. edmonton) and within national parks (e.g. banff national park) are excluded from the national inventory of coal resources. although coal deposits that occur within provincial parks (e.g. naikoon provincial park, british columbia, and kananaskis country, alberta) are included in the inventory, they often contribute to coal resources of future interest. factors associated with land reclamation in canadas high arctic could mitigate against future large scale surface coal mining, even if other economic and technological were favourable.proceeding with coal developments in future will likely depend, to a large degree, on associated social and environmental impacts relative to alternative energy options. canadian coal deposits are widespread, and coal composition and properties are diverse. these factors provide a basis for choice in selecting a coal that best suits a particular need, and in optimizing social benefit. these factors provide a basis for choice in selecting a coal that best suits a particular need, and in optimizing social benefit. the problems associated with coal exploitation may be more manageable than those associated with other energy sources. coal research and development activities vy the private and public sectors continue to address the challenge of more efficiently exploiting this fuel and, thus, provide additional potential for coal to contribute greater wealth to the nation.附录b通风模型在掘进的应用和加拿大煤炭资源在社会和政治上限制的影响在适宜工作的环境下，为了能够更深入开采地下的矿物和煤，使用了高效率的机械设备以提高生产水平这样也增加了通风系统的负担。空气经过这些机械时可能产生不利于影响人体身体健康和生命安全的问题。在加拿大，矿物的开采深度已经超过了1000米。此外，连续采煤机和巷道锚杆支护的方法的使用提高了生产率，但粉尘排放、气体燃料消耗、废热和湿度的变化这也同样意味着成本的增加。众所周知，以提高效率为目的，在设计阶段和采矿时必须增加辅助通风系统，以维持适当的地下环境和气温。通风系统的改良，取得了在质与量的控制将有助于提供更好的空气、尘埃的稀释和气温控制。采矿方法的使用有可能是经济或实际的限制，但气候的改善，唯一能够使用的则是通风空调。如果是因为这个限制的，就需要考虑选择性的应用空调冷却系统。该文件详细介绍了在英国诺丁汉大学建设的基于计算机基础上的气候预测控制的工具。这项工作是建立在先前的研究基础（罗斯等人，1997年，第六届国际矿井通风年会，中小企业，利特尔顿，合作，第283-288页 ）开发了原型模型短巷道的开拓。目前模型能预测单巷道掘进中的空气湿度和热力学条件长期变化。该模型涉及了传热介质之间的地层、水、机械和通风系统。结果所产生的模型已对相关的通风，气候和相应的数据，在英国的深煤矿取得了一些巷道的快速掘进。该文详细给出了英国莫尔特比煤矿尾闸巷道发展的一系列的相关应用和进行的研究对通风和气候的调查数据。本文得出的结论和结果是个别方案的研究，说明的应用验证模型的设计和运行一个综合的矿井通风和冷却系统。案例研究说明，大体上增加深度，巷道内的温度的快速变化对气候的影响。进一步调查，以找出最佳的冷却策略，在独头掘进的巷道内应采用以维持一个令人满意的气候。煤炭资源的评价应该反映煤赋予土地中的财富。评价形式主要表现在长期公共及商业规划等方面，未来的煤炭供应的可能性，及土地使用的选择。在加拿大，大部分煤层以各种形式和数额沉积在盆地中。煤层厚度；埋藏深度；埋藏形式，表面上的地理位置和煤炭质量这些主要因素都是评价的重要指标。有一些煤炭资源在技术，经济和一些其它性质上都没有开采的价值。随着技术进步和经济条件的变化，在可预见的将来，这些现在不可开采的煤炭资源，可能成为可行的来源，煤或煤的衍生品都有潜在的价值。估计一个国家的煤炭资源不应把那些堤藏极深或不具开采价值的储量放在其中。本篇文章的重点是与加拿大煤炭资源的切身利益相关的。大量的煤可能被利用在可预见的将来，当技术或法规允许的条件下，煤炭资源将会有更大的经济价值，这些都被列为煤炭未来的利益。普遍认，具有可采的煤炭资源煤层不应小于60厘米厚（除新不伦瑞克省以外，更薄的矿床，目前正在开采） ，埋藏在水深都大于600米，从表面上看，（除了新星斯的资源，挖掘更大的深度是根据目前的计划） 。相对于薄煤层来说，要考虑资源未来的利益，如果地下开采是可能的采煤方法，它们必须有助于建立一个与其它矿床接近最低的总厚度为1.5米的煤层。这常常是被称为煤矿区或采矿区。煤炭资源的储量无论在加拿大还是在世界的其地方都非常大，它目前大约占加拿大的能源经济的14%，在1986年他对于发电的贡献是