共查询到19条相似文献，搜索用时 312 毫秒
1.
在岩巷掘进中应用中深孔爆破技术可减少辅助作业时间,提高单循环进尺,目前应用日益广泛.但由于掘进巷道工作面狭小,一些施工单位未能掌握施工关键技术及参数.因此,本文以淮南矿业集团谢桥矿为例,通过分析实际状况,对中深孔爆破技术在硬岩巷道掘进施工中的应用问题进行探讨. 相似文献
2.
3.
利用派生成组性质相同的小断裂判断主断层的性质 总被引：3，自引：0，他引：3
丁宽 《雁北师范学院学报》2006,22(5):55-57
同煤集团公司四台矿406采区建井期间首采工作面布置过程中,运输顺槽掘进至520m时,出现了一条落差超过煤层厚度的断层,落差和性质不明,只知道产状.在可利用的地质构造资料很少的情况下,仅利用本巷已接露的一组性质都为正断层、倾向近270°、倾角较大、落差很小的小断层组的性质、产状等要素来推断与之相距约15m左右的主断层的性质.然后提出用钻机向上打孔来探煤的方案,一次性地找到了煤层断失翼的位置,抢回了工期,节省了钻探费用.成功地解决了巷道在掘进过程中遇断的问题. 相似文献
4.
5.
针对煤矿在坚硬岩石巷道中掘进,从影响岩巷爆破效果的等因素出发,对影响岩巷掘进速度和巷道质量的炮眼深度、掏槽爆破和光面爆破等问题进行了分析和实践探索,总结了较为合理的掏槽形式和掏槽爆破参数及光面爆破参数。 相似文献
6.
目的:分析当前最新的针对烟气中颗粒物的高效脱除技术,包括静电除尘和袋式除尘的提效方法、原理以及所能达到的效果等;对研究现状进行评述和对未来发展做出展望,并介绍袋式除尘的相关ISO标准。创新点:1.总结了各参数对静电除尘器(包括低低温静电除尘、高温静电除尘和湿式静电除尘等)除尘效率的影响;2.分析比较了不同结构形式的滤袋并总结了适应更高过滤要求的新型过滤材料。方法:1.通过数据分析,比较不同粒径、比电阻和温度对静电除尘器除尘效率的影响,并提出相关改进措施;2.比较不同形式滤袋的收尘特点,结合ISO标准和当前工业需求,对袋式除尘进行展望。结论:1.为保证除尘效率,对于不同特性的粉尘,可采取不同形式的静电除尘器增效技术;2.为满足更高的过滤要求,在袋式除尘器方面,急需开发新型过滤材料和优化清灰技术,以适应更高的温度和满足更高的清灰要求。 相似文献
7.
张凤松 《淮南职业技术学院学报》2006,6(3):24-25
介绍了巷道掘进过程中,在拨门、变向、斜巷变坡等特殊位置,使用全站仪采用趋近法标定出巷道的特征点和掘进方向的一种方法;给出了标定原理和应用实例;实践证明该方法简单易行,费时少,精度高,特别是在标定距离L1越远的情况下,利用全站仪,更能发挥趋近法标定的优越性。 相似文献
8.
申金素 《中国科教创新导刊》2008,(26)
根据KCS-225Z型除尘风机在掘进工作面的配套方式,研制了该设备的支撑跑车,实现了除尘风机与掘进机、SDJ-150皮带机机尾和SJ-80皮带机的机尾的配套,保证了它的正常使用。 相似文献
9.
新汶矿业集团孙村煤矿在21101煤柱工作面应用前进式沿空留巷,减少了巷道掘进工程量,保证了工作面按期投产,缓解了矿井接续紧张的局面。 相似文献
10.
本文阐述了等强树脂螺纹钢锚杆替代普通螺纹钢锚杆在大雁二矿三水平二段30#层掘进工作面的试验与应用,等强树脂螺纹钢锚杆解决了煤巷普通螺纹钢锚杆,因爆帮后大量失效必须重新补打的问题.通过生产实践,采用等强树脂螺纹钢锚杆支护取得良好的效果,减少了锚杆巷道掘进维护量,节省支护材料,降低了工人劳动强度. 相似文献
11.
Dust collection technology is used not only as a countermeasure for air pollution, but also as removing technology for nano-particles, simultaneous removal of gas and dust, and facilitating the use of equipment in extreme conditions such as high and low pressures and temperatures. Particle concentration in the atmosphere, especially PM2.5, has not decreased despite a reduction in the concentration of dust discharged from stationary sources. This is thought to be because of the formation of secondary particles following the discharge of condensable and/or reactive gaseous materials. Therefore, there needs to be an improvement in dust collection technology. In this paper, recent developments in dust collection technology, especially bag filtration and electrostatic precipitators, are described, and the ISO standards related to bag filtration are summarized. The future prospects for these technologies are outlined. This paper contributes to our understanding of the capture of particulate matter, which will support the improvement of particle removal technologies and the development of future applications. 相似文献
12.
雷玉勇 《重庆大学学报(英文版)》2003,2(1)
1. Introduction With the development of transportation, more and more road tunnels, especially the long tunnels, such as Erlangshan Tunnel (4176 m, China), Arlberg Tunnel (13972 m, Austria), Kan-etsu Tunnel (11055 m, South tube, Japan) and Laerdal Tunnel (24510m, Norway) have been built on the highway lines [1]. In a road tunnel, the exhaust gases given off by automobile engines, such as smoke, carbon monoxide (CO), oxynitride (NOx), hydrocarbon, etc., and dust produced by the passing a… 相似文献
13.
包海玲 《廊坊师范学院学报(自然科学版)》2014,(3):76-79
在众多煤矿的深埋巷道支护中,锚杆破断甚至支护体系失效等问题日渐突出.以淮北临涣矿为工程背景,综合考虑影响深部巷道围岩变形的各种因素,建立了临涣煤矿的深部巷道计算模型.采用大型有限元软件ANSYS,分析软岩影响下的巷道变形特点.分析了锚杆支护下的巷道围岩变形的控制,并结合巷道应力破坏特点,对临涣煤矿锚杆支护进行了支护优化设计.对各种锚杆支护工况进行了数值模拟仿真分析,得出锚杆支护效果不仅与围岩条件及巷道自身特点有关,而且与锚杆自身设计参数有关的结论. 相似文献
14.
融合计算机网络、数据传输、定位等技术并引入矿井空间位置信息研发了矿产资源远程监管系统,该系统为井下的开采人员及开采设备等安装RFID标签,在巷道的关键和边界位置安装读卡分站;在露天矿山开采设备上安装GPS监控模块;运用GIS拓扑分析技术生成矿山巷道的要素,运用GIS可视化技术,以图形的方式直观、实时显示井下情况,实时监控井下设备、工作人员的地理位置以及矿产采掘情况。 相似文献
15.
Aiming at the large deformation and support problems of high-stress and broken-expansion surrounding rock, and taking 1 000 m level roadway of Mine II in Jinchuan as the research object, an investigation on the deformation and damage of roadway surrounding rock and an analysis of its mechanism were carried out. The gray correlation theory was used in support scheme optimization design. First, causes and mechanism of deformation of the 1 000 m horizontal transport channel were analyzed through field investigation, laboratory test and data processing methods. We arguued that poor engineering geological conditions and deep pressure increases were the main factors, and the deformation mechanism was mainly the ground deformation pressure. Second, the gray correlation theory was used to construct supporting optimization decision method in the deep roadway. This method more comprehensively considers various factors, including construction, costs, and supporting material functions. The combined support with pre-stressed anchor cables, shotcrete layer, bolt and metal net was put forward according to the actual roadway engineering characteristics. Finally, 4 support schemes were put forward for new roadways. The gray relational theory was applied to optimizing the supporting method, undertaking technical and economic comparison to obtain the correlation degree, and accordingly the schemes were evaluated. It was concluded as follows： the best was the flexible retaining scheme using the steel strand anchor; the second best was the one using plate anchors on the top and rigid common screw steel bolt on the two sides; the ttiird was; the rigid common screw steel bolt in full section of roadway; and the worst is the planished steel rigid support. The optimized scheme was applied to the 1000 m level of new excavation roadway. The results show that the roadway surrounding rock can reach a stable state after 5 to 6 months monitoring, with a convergence rate less than 1 mm/d. 相似文献
16.
以冷冻杨梅鲜果为原料采用酶解浸提法制作杨梅酒,研究果胶酶和纤维素酶对杨梅酒出酒率的影响。通过单因素实验对影响杨梅酒出酒率的酶种类、酶解温度、酶解时间、酶底物比四因素进行考察,并通过正交实验法优化了杨梅酶解工艺参数。结果表明：确定果胶酶为酶解用酶,酶解法制备杨梅酒酶最佳工艺参数为酶解温度35℃、酶解时间4h,酶底物比2％。在此条件下,杨梅酒出酒率为（79．4±0．19）％,比同法不加果胶酶出酒率增加25．4％,并且过滤时间明显缩短。 相似文献
17.
基于甘庄煤矿近距离煤层巷道锚杆描索联合支护参数设计,从近距离煤层巷道闱岩实际及本矿巷道乏护现状出发,采用MIDAS/GTS数值模拟,分析了近距离煤层巷道围岩位移、应力分布及破坏范围;研究了不同因素对巷道旧岩变形与破坏的影响,设计得出合理的是护参数,进而提高锚杆锚索联合支护参数设计的科学合理性及实用可靠性,进一步发挥锚杆支护技术的潜力,为近距离煤层巷道支护提供理论依据及技术支持 相似文献
18.
在聚环氧氯丙烷二甲胺与弱酸性橙GS构成的絮凝脱色体系中,所生成的絮体颗粒细小难以沉降,导致絮凝脱色效率偏低.当外加微量的碳质残渣、高岭土、纳米二氧化钛、纳米二氧化硅等固体颗粒物时,所得絮体的沉降性能有明显的改善,有利于提高脱色效率.这表明这些外加固体颗粒物对该絮凝体系的成核有促进作用,即絮凝除浊对脱色有协同效果. 相似文献
19.
A. Michael Noll 《Communication quarterly》2013,61(2):51-56
Interactions between two pairs of subjects were conducted face‐to‐face and over a two‐way closed‐circuit television medium and were tape recorded. The speech for each subject over each medium was edited to remove silent intervals and the resulting edited speech segments, each about 1 minute in duration, were analyzed by a computer implementation of the cepstrum method of fundamental‐frequency determination. The speech of all four subjects showed a statistically significant rise in fundamental frequency ranging from 3.89% to 7.83% for the closed‐circuit television condition relative to the face‐to‐face condition. This result could imply that two‐way closed‐circuit television is a more tense or stressful medium than face‐to‐face communication. Alternatively, the effect could be explained by such other factors as a rise in speech level caused by a greater perceived distance between the participants in the closed‐circuit television condition. 相似文献