外文翻譯--掘進(jìn)機(jī)在采礦和隧道業(yè)中的應(yīng)用-展示頁
2025-05-27 06:48本頁面
【正文】 的和意義深長的圖紙幅面獲得必需的磁場(chǎng)數(shù)據(jù)，一個(gè)數(shù)據(jù)的收集從準(zhǔn)備到送至主修收縮器，還有掘進(jìn)機(jī)的制造商。 數(shù)據(jù)庫包含六種數(shù)據(jù)，如表 1 所示。被包含在數(shù)據(jù)庫的最重要的和最相關(guān)的巖石質(zhì)量特性含巖石性質(zhì)指示 (RQD), 固定聯(lián)合組和水文學(xué)狀態(tài)的厚度山。巖石形成被區(qū)分開，使最小在機(jī)器性能數(shù)據(jù)的變化范圍提供正確的分析。 結(jié)論 通過這些評(píng)估和數(shù)據(jù)分析，數(shù)據(jù)庫已經(jīng)成功的產(chǎn)生能夠?yàn)榫蜻M(jìn)機(jī)預(yù)測(cè)瞬時(shí)截割率和截齒損耗率的一組方程。在有裂縫的巖石中，這種分析將會(huì)被利用來自一個(gè)掘進(jìn)機(jī)的可截割性觀點(diǎn)對(duì)巖石特性的衡量。 附錄 B 外文文獻(xiàn) Roadheader applications in mining and tunneling industries H. Copur1, L. Ozdemir2, and J. Rostami3 1Graduate Student, 2 Director and Professor, and 3 Assistant Professor Earth Mechanics Institute, Colorado School of Mines, Golden, Colorado, 80401 ABSTRACT Roadheaders offer a unique capability and flexibility for the excavation of soft to medium strength rock formations, therefore, are widely used in underground mining and tunneling operations. A critical issue in successful roadheader application is the ability to develop accurate and reliable estimates of machine production capacity and the associated bit costs. This paper presents and discusses the recent work pleted at the Earth Mechanics Institute of Colorado School of Mines on the use of historical data for use as a performance predictor model. The model is based on extensive field data collected from different roadheader operations in a wide variety of geologic formations. The paper also discusses the development of this database and the resultant empirical performance prediction equations derived to estimate roadheader cutting rates and bit consumption. INTRODUCTION The more widespread use of the mechanical excavation systems is a trend set by increasing pressure on the mining and civil construction industries to move away from the conventional drill and blast methods to improve productivity and reduce costs. The additional benefits of mechanical mining include significantly improved safety, reduced ground support requirements and fewer personnel. These advantages coupled with recent enhancements in machine performance and reliability have resulted in mechanical miners taking a larger share of the rock excavation market. Roadheaders are the most widely used underground partialface excavation machines for soft to medium strength rocks, particularly for sedimentary rocks. They are used for both development and production in soft rock mining industry (. main haulage drifts, roadways, crosscuts, etc.) particularly in coal, industrial minerals and evaporitic rocks. In civil construction, they find extensive use for excavation of tunnels (railway, roadway, sewer, diversion tunnels, etc.) in soft ground conditions, as well as for enlargement and rehabilitation of various underground structures. Their ability to excavate almost any profile opening also makes them very attractive to those mining and civil construction projects where various opening sizes and profiles need to be constructed. In addition to their high mobility and versatility, roadheaders are generally low capital cost systems pared to the most other mechanical excavators. Because of higher cutting power density due to a smaller cutting drum, they offer the capability to excavate rocks harder and more abrasive than their counterparts, such as the continuous miners and the borers. ROADHEADERS IN LAST 50 YEARS Roadheaders were first developed for mechanical excavation of coal in the early 50s. Today, their application areas have expanded beyond coal mining as a result of continual performance increases brought about by new technological developments and design improvements. The major improvements achieved in the last 50 years consist of steadily increased machine weight, size and cutterhead power, improved design of boom, muck pick up and loading system, more efficient cutterhead design, metallurgical developments in cutting bits, advances i
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