煤矿绿色开采技术

煤矿资源在现代社会的发展中已经成为了一种十分广泛但宝贵的资源,一个国家社会经济的发展离不开煤矿资源。因此,煤矿资源的合理开采和有效利用十分重要。     

煤矿电气自动化控制技术中单片机的应用

本文主要分析了单片机在煤矿电气化控制技术中的应用现状,重点介绍了不同单片机应用途径,其对煤矿电气自动化控制技术替代传统煤矿开采技术具有重要意义,利于促进煤矿电气自动化的研究。通过对煤矿电气自动化控制技术中单片机的应用分析,以期提高煤矿开掘技术的安全性和稳定性。     

反渗透技术在煤矿水处理中的应用分析

为节省水资源，解决煤矿生产中水资源的浪费问题，提升井下水的利用率，促进节能减排生产目标的实现，从水资源回收再利用的角度出发，对矿井水处理中关键的反渗透技术进行了分析，阐述了反渗透技术在煤矿水处理中的应用，以期为煤矿生产提供参考。     

掘进工作面综合防尘技术的实践与应用

伴随着煤矿行业获得较大的发展以及对环保问题重视程度的提高，需要注重在掘进工作面对综合防尘技术加以应用。在煤矿掘进工作当中，防尘技术发挥着十分重要的作用，可以直接影响到煤矿开采作业的安全，也可以减少粉尘事故的发生。基于此，对煤矿掘进工作面粉尘的概念进行了叙述，并探究了煤矿掘进工作面综合防尘技术的应用，以利于为工作人员提供更加良好的开采环境，保证掘进工作的安全。     

煤矿机电技术管理在煤矿安全生产中的应用

本文主要对煤矿安全生产中的不足,以及煤矿机电技术管理在煤矿安全生产中的应用进行分析,着重分析了煤矿机电技术管理的应用,以此有效促进煤电安全生产。通过对煤矿机电技术管理在煤矿安全生产中的应用分析,以期有效避免煤矿安全生产中的安全事故,促进煤矿生产水平的提高。     

煤矿巷道掘进施工及顶板支护技术研究

针对煤矿开展开采工作过程中，由于环境、地质、设备、技术等因素对巷道掘进与顶板支护造成一定影响，导致煤矿开采工作安全性与效率无法得到有力保障的情况，以青洼煤业为研究对象，针对煤矿巷道掘进施工以及顶板支护技术展开探讨分析，以期为相关技术应用提供参考。     

依靠科技 保护环境 实现全过程清洁生产

徐州矿务局庞庄煤矿由庞庄、东城、张小楼3对生产井口组成,生产原煤 240万 t/a,原煤全部入洗。并配套有装机容量6 000 kW沸腾煤电厂、年产3万t的水泥厂、年产4万块的炉渣空心砌块砖厂,形成了“采煤—洗选加工—矸石发电—矸石、灰渣建材”的综合生产系统,年创利润6 000多万元,是江苏省目前产量最高、效益最好的煤矿之一。 在不断深化内部改革,强化企业管理,努力挖     

煤矿工程采矿技术与施工安全管理分析

针对煤矿工程采矿技术的应用现状,进行有效的分析,并简要介绍了加强煤矿工程施工安全管理的重要价值、煤矿工程采矿技术应用要点,如深层井采矿技术、硬顶采矿技术等等,提出煤矿工程施工管理措施,希望能够为有关工作人员提供良好的帮助。     

基于煤矿固体废弃物的危害及环保治理技术研究

在煤炭开采过程中，会产生大量的固体废弃物，一些尾矿、废石以及尾渣等固体废弃物的增多，不仅会对自然生态环境造成严重的影响，同时会对社会大众身体健康造成一定的影响。基于此，简要分析煤矿固体废物的危害，重点对煤矿固体废弃物的环保治理技术与综合利用进行探究，加强煤炭生产过程中对煤矿固体废弃物的环保处理与综合利用，研究成果可为相关环保治理实践提供借鉴。     

煤矿酸性废水处理研究进展

目前大部分煤矿酸性废水（Acid Coal Mine Drainage ACMD）都没有经过处理而直接外排,造成附近水体及环境严重污染。应该采取有效的技术措施,使废水净化、复用,以保护短缺的水资源和生态环境。对煤矿酸性废水的形成与危害、治理技术,污水净化手段以及水资源保护等方面进行了探讨。     

Insect antifeedant properties of anthranoids from the genusVismia

Vismiones and ferruginins, representatives of a new class of lypophilic anthranoids from the genusVismia were found to inhibit feeding in larvae of species ofSpodoptera, Heliothis, and inLocusta migratoria.     

Direct observation of freeze-thaw instability of latex coatings via high pressure freezing and cryogenic SEM

Despite its industrial importance, the subject of freeze-thaw (F/T) stability of latex coatings has not been studied extensively. There is also a lack of fundamental understanding about the process and the mechanisms through which a coating becomes destabilized. High pressure (2100 bar) freezing fixes the state of water-suspended particles of polymer binder and inorganic pigments without the growth of ice crystals during freezing that produce artifacts in direct imaging scanning electron microscopy (SEM) of fracture surfaces of frozen coatings. We show that by incorporating copolymerizable functional monomers, it is possible to achieve F/T stability in polymer latexes and in low-VOC paints, as judged by the microstructures revealed by the cryogenic SEM technique. Particle coalescence as well as pigment segregation in F/T unstable systems are visualized. In order to achieve F/T stability in paints, latex particles must not flocculate and should provide protection to inorganic pigment and extender particles. Because of the unique capabilities of the cryogenic SEM, we are able to separate the effects of freezing and thawing, and study the influence of the rate of freezing and thawing on F/T stability. Destabilization can be caused by either freezing or thawing. A slow freezing process is more detrimental to F/T stability than a fast freezing process; the latter actually preserves suspension stability during freezing. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004 in Chicago, IL. Tied for first place in The John A. Gordon Best Paper Competition.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Bark and Ambrosia Beetles in the Southeastern US

In 2002–2004, we examined the flight responses of 49 species of native and exotic bark and ambrosia beetles (Coleoptera: Scolytidae and Platypodidae) to traps baited with ethanol and/or (−)-α-pinene in the southeastern US. Eight field trials were conducted in mature pine stands in Alabama, Florida, Georgia, North Carolina, and South Carolina. Funnel traps baited with ethanol lures (release rate, about 0.6 g/day at 25–28°C) were attractive to ten species of ambrosia beetles (Ambrosiodmus tachygraphus, Anisandrus sayi, Dryoxylon onoharaensum, Monarthrum mali, Xyleborinus saxesenii, Xyleborus affinis, Xyleborus ferrugineus, Xylosandrus compactus, Xylosandrus crassiusculus, and Xylosandrus germanus) and two species of bark beetles (Cryptocarenus heveae and Hypothenemus sp.). Traps baited with (−)-α-pinene lures (release rate, 2–6 g/day at 25–28°C) were attractive to five bark beetle species (Dendroctonus terebrans, Hylastes porculus, Hylastes salebrosus, Hylastes tenuis, and Ips grandicollis) and one platypodid ambrosia beetle species (Myoplatypus flavicornis). Ethanol enhanced responses of some species (Xyleborus pubescens, H. porculus, H. salebrosus, H. tenuis, and Pityophthorus cariniceps) to traps baited with (−)-α-pinene in some locations. (−)-α-Pinene interrupted the response of some ambrosia beetle species to traps baited with ethanol, but only the response of D. onoharaensum was interrupted consistently at most locations. Of 23 species of ambrosia beetles captured in our field trials, nine were exotic and accounted for 70–97% of total catches of ambrosia beetles. Our results provide support for the continued use of separate traps baited with ethanol alone and ethanol with (−)-α-pinene to detect and monitor common bark and ambrosia beetles from the southeastern region of the US.     

Many Drugs of Abuse May Be Acutely Transformed to Dopamine,Norepinephrine and Epinephrine In Vivo

It is well established that a wide range of drugs of abuse acutely boost the signaling of the sympathetic nervous system and the hypothalamic–pituitary–adrenal (HPA) axis, where norepinephrine and epinephrine are major output molecules. This stimulatory effect is accompanied by such symptoms as elevated heart rate and blood pressure, more rapid breathing, increased body temperature and sweating, and pupillary dilation, as well as the intoxicating or euphoric subjective properties of the drug. While many drugs of abuse are thought to achieve their intoxicating effects by modulating the monoaminergic neurotransmitter systems (i.e., serotonin, norepinephrine, dopamine) by binding to these receptors or otherwise affecting their synaptic signaling, this paper puts forth the hypothesis that many of these drugs are actually acutely converted to catecholamines (dopamine, norepinephrine, epinephrine) in vivo, in addition to transformation to their known metabolites. In this manner, a range of stimulants, opioids, and psychedelics (as well as alcohol) may partially achieve their intoxicating properties, as well as side effects, due to this putative transformation to catecholamines. If this hypothesis is correct, it would alter our understanding of the basic biosynthetic pathways for generating these important signaling molecules, while also modifying our view of the neural substrates underlying substance abuse and dependence, including psychological stress-induced relapse. Importantly, there is a direct way to test the overarching hypothesis: administer (either centrally or peripherally) stable isotope versions of these drugs to model organisms such as rodents (or even to humans) and then use liquid chromatography-mass spectrometry to determine if the labeled drug is converted to labeled catecholamines in brain, blood plasma, or urine samples.     

Novel polyurethane coating technology through glycidyl carbamate chemistry

Glycidyl carbamate chemistry combines the excellent properties of polyurethanes with the crosslinking chemistry of epoxy resins. Glycidyl carbamate functional oligomers were synthesized by the reaction of polyfunctional isocyanate oligomers and glycidol. The oligomers were formulated into coatings with several amine functional crosslinkers at varying stoichiometric ratios and cured at different temperatures. Properties such as solvent resistance, hardness, and impact resistance were dependent on the composition and cure conditions. Most coatings had an excellent combination of properties. Studies were carried out to determine the kinetics of the curing reaction of the glycidyl carbamate functional oligomers with multifunctional and model amines. Detailed kinetic analysis of the curing reactions was also undertaken. The results indicated that the glycidyl carbamate functional group is more reactive than a glycidyl ether group. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, on October 27–29, 2004, in Chicago, IL.