共查询到20条相似文献,搜索用时 46 毫秒
1.
2.
鹤岗矿业集团新兴煤矿已有70多年的开采历史,建矿初期设计生产能力为30万吨/年,经过几次技术改造达到140万吨。为改变原有落后的梯形工字钢棚支护局面,该矿通过选取合适的支护参数和支护形式,在二水平一石门- 相似文献
3.
加强煤巷掘进过程中的顶板、煤帮的跟进支护,不仅可以保证前方掘进的安全进行,也为后期回采奠定了良好基础。以某煤矿开采工作面的煤岩特征为原始背景,通过分析应力分布以及稳定性计算得出顶板冒落高度,得出了适合煤矿巷道支护的重要参数,保证施工现场安全掘进,具有十分重要的学习价值。 相似文献
4.
5.
正随着我国煤矿开采深度不断延深,地应力逐渐增大,且综采因技术发展架型越来越大,传统煤锚支护或单一架棚支护已不能满足安全生产要求。近年来,山西襄垣煤业有限公司根据实际地质情况,提出了在厚煤层构造区大跨度切眼施工采用锚杆+锚索+钢带联合支护方式,不仅能较好地控制巷道围岩变形和破坏,避免了二次支护和返修工作,实现了安全生产。一、施工区地质构造施工切眼位于1503盘区,煤层厚,其伪顶为炭质泥岩和薄煤,直接顶为黑色页岩,老顶为石灰岩与页岩互层。地质构造复杂,受弯曲构造影响,煤岩层破碎、裂隙发育,极易发生冒顶。 相似文献
6.
随着我国科技水平的不断发展,采矿工程技术在逐步完善.矿山的深度在不断增加,给煤炭采掘带来了更高的工作难度,因此施工人员对于巷道掘进和支护十分重视,许多技术人员使用锚杆支护技术,还在持续对煤矿巷道掘进和支护技术进行改革创新,这样不仅可以有效增加巷道的稳定性,还可以减少成本,合理调配人力物力资源. 相似文献
7.
8.
在生产矿井每年掘进的巷道中,采区内的准备巷道和回采巷道约占80%以上。因此,如何科学合理确定采区巷道的支护方式,是矿井支护工作的一项主要任务。 相似文献
9.
新元煤业东辅运大巷2#联络巷与回风大巷的交叉点是新掘巷道与原有巷道贯通后形成的交叉点,新掘巷道的扰动影响打破原有巷道围岩应力平衡状态,导致巷道交叉点处围岩的松动圈变大,巷道变形,为此,提出全锚索(7.3m锚索)+密集点柱进行支护,加打9根12m锚索进行补强的新型支护方案,通过对施工完成后的交叉点表面位移及顶板离层进行观测,可知:该支护技术满足交叉点支护强度的需要,能有效控制巷道变形,取得较好的支护效果,保证了矿井通风、行人等安全需要。 相似文献
10.
通过对煤层深部大断面巷道变形及力学性质的分析和对矿压显现主要特征的研究,提出深部开采大断面巷道的围岩控制原理和支护原则,确定巷道支护结构及支护机理、支护参数及支护要求。施工实践表明,锚网喷+锚索联合支护技术取得了良好的效果,值得广泛推广应用。 相似文献
12.
13.
玉溪煤矿进风立井马头门岩石裂隙发育,断面大,服务年限长,顶板松动圈范围大,易掉顶,成形差,采用锚网索喷一次支护和双层钢筋混凝土结构二次支护的复合支护,实施效果良好可行,值得大面积推广。 相似文献
14.
本文从力学角度对两种支护进行了比较,并从理论上阐述了采区巷道锚杆支护的可行性,指出了施工中遇到的同题及应采取的措施. 相似文献
15.
Marco Formentini Pietro Romano 《International Journal of Production Economics》2011,131(2):545-560
This paper investigates how formalized methodologies can effectively support the implementation of knowledge transfer practices in the multi-project setting. We propose a knowledge collection and transfer model grounded on the Value Analysis technique, empirically developed and validated through an action research in the shipbuilding industry. The proposed model facilitates decision making across multiple projects in the cruise ship design by stimulating the reuse of the available knowledge base and the exploitation of information needed to identify design solutions to solve the trade-off between functional requirements and available resources. 相似文献
16.
介绍了神东煤炭集团哈拉沟煤矿主斜井钢丝绳芯胶带长时间安全运行的主要措施、主要成效,对煤炭企业推进胶带运输管理创新,建设安全高效现代化矿井积累了一定的经验。 相似文献
17.
Kuang-Chao Yu Szu-Chun Fan Fu-Hsing Tsai Yih-hsien Chu 《International Journal of Technology and Design Education》2013,23(4):883-901
This article examines the effect of scientific detective video as a vehicle to support the design of technology activities by technology teachers. Ten graduate students, including current and future technology teachers, participated in a required technology graduate course that used scientific detective videos as a pedagogical tool to motivate their interest in science and technology and to reinforce creative competence in designing technology learning activities (TLAs). The participants watched three scientific detective videos and analyzed them for scientific principles and technologies. An analysis report and interview were conducted to collect participants’ understanding and application of scientific principles and technologies. The main findings were that (a) influencing teacher’s design of TLAs through scientific detective videos is feasible; (b) prior personal conditions and external factors influence teacher’s design of TLAs; and (c) the analysis of scientific detective videos helps teachers to design TLAs appropriately. This study demonstrated the broad utility of scientific detective videos for inspiring technology teachers to integrate science and technology in their activity design. 相似文献
18.
19.
20.
Using least squares support vector machines for the airframe structures manufacturing cost estimation 总被引:1,自引:0,他引:1
S. DengTsung-Han Yeh 《International Journal of Production Economics》2011,131(2):701-708
Accurate cost estimation plays a significant role in industrial product development and production. This research applied least squares support vector machines (LS-SVM) method solving the problem of estimating the manufacturing cost for airframe structural projects. This research evaluated the estimation performance using back-propagation neural networks and statistical regression analysis. In case studies, this research considered structural weight and manufacturing complexity as the main factors in determining the manufacturing labor hour. The test results verified that the LS-SVM model can provide accurate estimation performance and outperform other methods. This research provides a feasible solution for airframe manufacture industry. 相似文献