小型煤矿低浓度瓦斯发电技术及应用效果研究

针对云南富源县辖区内大量小型煤矿抽采的低浓度瓦斯未开展有效利用的问题，以区内某小型煤矿为背景，采用现场调研、分析归纳、理论计算相结合的方法对其低浓度瓦斯发电项目展开分析研究。研究表明，某小型煤矿低浓度瓦斯发电项目成功的关键是“瓦斯治理先行”理念主导下的气源保障综合技术体系。在气源得以保障的基础上，该小型煤矿低浓度瓦斯发电项目已经持续高效运行4年，每年创造经济收益约403.2万元，减排CO2约4.47万t；同时促进了煤矿瓦斯治理工作有效落实，提高了煤矿安全生产水平，保障了煤矿产量的达标。     

臭氧氧化技术在有色金属湿法冶金中的应用研究进展

臭氧是一种氧化性极强、多功能化的绿色氧化剂。本文综述了臭氧氧化技术在有色金属湿法冶金领域的研究进展和应用现状,重点介绍了在贵金属、重金属、稀有金属及轻金属等有色金属湿法冶金领域的应用研究。详细探讨了臭氧的强氧化性对低品位金属矿和难冶金属矿浸出、溶液中低价态金属离子氧化沉淀、溶液净化除杂等方面的作用机理,并对目前面临的问题进行简要叙述,对其在有色金属湿法冶金领域的应用前景进行了展望。     

放顶煤液压支架在土耳其IMABT煤矿现场的应用

通过对土耳其IMBAT煤矿地质条件的分析研究，结合多种选型计算方法的验证，最终选择了合适的设备，使该矿的开采效率得到较大提升。同时也扩大了我国的煤炭开采装备应用范围。根据在土耳其IMBAT煤矿现场多年的服务经验，将理论与实践相结合，就综采放顶煤液压支架在土耳其IMABT煤矿现场的应用进行了论述。     

Predictive association of metal–organic systems in the solid-state: the molecular electrostatic potential based approach

Designing crystalline solids with improved properties or performances remains a challenging task, despite great strides that have been made within the field of crystal engineering since its birth several decades ago. Herein, we are bringing examples that illustrate recent successes in taking supramolecular synthetic guidelines from the organic crystal engineering and adjusting those to metal-containing systems, particularly to the lower-dimensional ones. The versatility of calculated molecular electrostatic potential (MEP) as a new crystal engineering tool is demonstrated.     

拉深筋对板材变形特征和力学性能的影响研究

采用实验方法将金属板材拉过不同尺寸的拉深筋镶块，分析了拉深筋高度、圆角半径以及过筋次数对板材变形特征的影响规律，研究了过筋产生的预应变对板材后续力学性能的影响规律。结果表明：板材流过拉深筋后，流动方向上发生均匀的拉伸变形；过筋产生的预应变随着拉深筋高度增大而增大，随着圆角半径增大而减小，随着过筋次数增加而近似线性增大；预应变越大，材料后续屈服强度和抗拉强度越高，但后续延伸率越小，总延伸率随着预应变增大表现出先减小后增大的趋势。     

时空四维动态分析在采场及生产接续管理中的应用

时空四维动态分析管理理念是通过对矿井采场布局情况的精准分析,结合采场空间布置和时间布局,找出干涉点、影响点、关键点和突出问题,对生产布局情况进行动态循环调整,保障采场接续正常,为矿井长远稳定发展提供理论基础。     

Adsorption isotherm and kinetic modeling of a novel procedure for physical modification of silica gel using aqueous solutions of 4,4′-(1,2-ethanediyldinitrilo)bis-(2-pentanone) for preconcentration of Ni(II) ion

ABSTRACT

Aqueous solutions of 4,4′-(1,2-ethanediyldinitrilo)bis-(2-pentanone) (EDDBP) have been used in a novel green procedure for the physical modification of silica gel (SG) for solid-phase extraction and preconcentration of Ni(II) ion. Optimization experiments were carried out at 301 ± 1 K by batch technique. The EDDBP-modified SG was characterized using X-ray Diffraction Spectroscopy (XRD) and Brunaeur-Emmett-Teller (BET) determinations. The adsorption isotherm and kinetic models indicated a physisorption process. The modified SG showed moderate to high adsorption capacity values for Ni(II) ion (~98% removal efficiency) at pH 8. A sorption mechanism for Ni(II) chelation with EDDBP-modified-SG was proposed. These results suggest the procedure has advantages.     

珲春地区高瓦斯矿井煤自然发火标志气体研究

为了探究珲春地区高瓦斯矿井煤自然发火情况，选取该地区板石煤矿22、23a和八连城煤矿18#、26#共4个煤层进行程序升温特性实验，分析了CO及烃类气体产生量随温度的变化规律，优选自然发火标志气体，测算煤自燃临界温度。结果表明，板石22、23a和八连城18#、26#四个煤层的自燃临界温度分别为101.0℃、97.6℃、121.0℃、169.1℃。CO和C2H4的初现温度大约在30℃与80～120℃，且产生量随温度单调递增，可作为煤自燃预测预报的主要参考指标|而同时，为了保证检测的全面与准确，还可以将规律性良好的其他烃类气体、烯烷比和链烷比进行辅助参考。     

煤层顶板裂隙高位定向长钻孔安全高效抽采技术的研究与应用

放顶煤开采期间，上覆岩层受到矿压的影响，形成冒落带、裂隙带、弯曲下沉带，工作面采空区遗煤和围岩涌出的大量瓦斯飘浮在上方裂隙带区域，造成瓦斯聚集并向外涌出，形成了安全隐患，因此必须将该区域瓦斯抽出来；以往治理采空区瓦斯主要采用顶板裂隙高位钻场、顶板高抽巷等措施，但是这2种方法施工成本较高，且施工周期长，对生产接替影响较大。煤层顶板裂隙高位定向长钻孔安全高效抽采采用大功率钻机+定向钻进技术，在裂隙带施工控制整个回采范围的长钻孔，减少采空区和邻近层瓦斯向工作面空间的流动，真正实现了“以孔代巷”，既节省了成本，又缩短了工期，还提高了采空区瓦斯抽采的连续性、稳定性，减少了采空区瓦斯向外涌出，提升了瓦斯抽采效果，促进了煤矿安全高效发展。     

Live-Cell Copper-Induced Fluorescence Quenching of the Flavin-Binding Fluorescent Protein CreiLOV

CreiLOV is a flavin-binding fluorescent protein derived from the blue-light photoreceptor protein family that contains light-oxygen-voltage (LOV) sensing domains. Flavin-binding fluorescent proteins represent a promising foundation for new fluorescent reporters and biosensors that can address limitations of the well-established green fluorescent protein (GFP) family. Flavin-binding fluorescent proteins are smaller than GFPs, are stable over a wider pH range, offer rapid chromophore incorporation, and are oxygen-independent so can be applied to live anaerobic organisms. Among the flavin-binding fluorescent proteins, CreiLOV has a high quantum yield and excellent photophysical properties, making it promising for cellular applications. Here, we investigated the suitability of CreiLOV as an intensity- and fluorescence-lifetime-based metal sensor. CreiLOV selectively binds copper(II) over other biologically relevant metals with low-micromolar affinity, resulting in fluorescence quenching and a decrease in the fluorescence lifetime that can be observed in cuvettes and live bacterial cells.