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- Applying the rule and methods of Value Engineering(VE) in the research on rock heading machine assembly has made good benefit. 应用价值工程(VE)原理和方法,对岩巷掘进机械化作业线配套进行研究,使其取得良好的经济效益。
- Application of VE in the research on rock heading machine assembly VE在岩巷掘进机械化作业线配套研究中的应用
- Coal rock can be classified as humic and sapropelic coal. 在煤岩的分类中，有腐殖煤和腐泥煤之分。
- semi coal and rock roadway with weak floor 半煤岩软底巷道
- The ship struck the rocks head on. 那艘船迎头撞上了岩石。
- Coal rock is the muti-crevasse rock mass and its destruction forms are related with many factors. 煤岩是多裂隙岩体,在荷载作用下的破坏形式多种多样,而且煤岩的破坏与很多因素有关。
- Triaxial creep tests on coal rocks are carried out by Step Method and the XTR01 electric-fluid servo compression machine. 使用XTR01型微机控制电液伺服试验机,采用梯级加载法,对煤岩进行了三轴蠕变试验。
- Through analyzing the cutting line spacing of heading machine cutting head, a new method of determing cutting line spacing is put forward. 通过对掘进机截割头截线间距的分析,提出一种确定截线间距的新方法。
- The coal rock is a byproduct in the produce of coal.It not only engrosses a lot of farmlands and soil, but also pollutes the environment seriously. 摘要煤矸石是煤炭生产中的一种副产品，不仅占用大量农田和土地，而且严重污染环境。
- Research shows that maceral and the degree of metamorphism of coal rock are key factors that control the generating and storing capacity of coal rock. 煤岩组分和煤变质程度是影响煤层生储气能力的主控因素。
- The thread is a #10-32 UNF, the head style is a Round Head Machine Screw.Use simplified thread form to show threads in your detail. 我是个刚刚读机械工程的大一学生,目前在美国读书。
- The elastic wave parameters characteristics of Datong jurassic coal rock bed are analyzed.It will guide the channel wave seismic exploration in future. 对大同侏罗纪煤田的煤岩层弹性波特征参数进行分析,以便指导今后槽波地震探测工作。
- The new design strategy researched herein will put toward design from experience to numeralization and intelligence, and was applied to design milling head machine tool. 所提出的新产品设计方法，使设计从经验设计向数字化、智能化方向发展。
- According to the analysis to the coaly facies,the coal lithotypes,the coal rock composition,the text discusses the influence factor of coal endogenic crack. 文中通过对煤相、煤岩类型、煤岩成分的分析,论述了煤中内生裂隙的影响因素。
- Through analysis on anchoring and shotcreting theory, anchoring and shotcreting construction process at the rock heading cannon advancement face has been improved resulting in roadway support strength and interior quality improved. 通过分析锚喷作用机理,改进岩巷炮掘工作面的锚喷施工工艺,从而提高巷道支护强度和内在质量。
- Support for special thick complex roof of soft and weak semi coal and semi rock roadway in Jixi Mining Area 鸡西矿区软弱半煤岩巷特厚复合顶板支护
- During the anchoring and shotcreting construction at the rock heading blast advancement face, problems such as support strength can not be guaranteed or engineering quality uneasy to control exist. 岩巷炮掘工作面的锚喷施工存在支护强度得不到保证、工程质量不易控制等问题。
- Test and research on site blasting in semi coal and rock mine roadway with partings 含夹矸层半煤岩巷现场爆破试验研究
- Main facility is year of design ability 240 thousand tons super- lower one's head machine of board base Lian Zhu, loading the task of the production that irrigate steel of 2 steelworkses close half. 主要设备是一台年设计能力24万吨的超低头板坯连铸机，担负着二炼钢厂近一半的浇钢生产任务。
- The results show that under these conditions the rock burst is closely related to the coal rock characteristic, mining depth, thickness of strong roof and periodic weighting of roof. 结果表明在此条件下开采时发生的冲击矿压与煤岩性质、采深、坚硬顶板厚度及顶板的周期来压有密切关系。
