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在神华准能黑岱沟露天矿台阶爆破作业中减小钻孔偏差的措施 被引量:1
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作者 贾海鹏 张云英 +3 位作者 谢海鹏 陶华鸣 范晓晓 张海涛 《西部探矿工程》 CAS 2016年第6期188-190,共3页
在露天台阶爆破作业中,保证每一次爆破后新形成的台阶面的平整度不仅可以节约清运渣石时的运输成本,还可以从技术上提高钻孔的成孔质量,为精细化爆破提供条件。为了使爆破后形成新的平整台阶面,就要采取有效措施提高钻孔精度和减小钻孔... 在露天台阶爆破作业中,保证每一次爆破后新形成的台阶面的平整度不仅可以节约清运渣石时的运输成本,还可以从技术上提高钻孔的成孔质量,为精细化爆破提供条件。为了使爆破后形成新的平整台阶面,就要采取有效措施提高钻孔精度和减小钻孔偏差。通过对神华准能公司黑岱沟露天煤矿台阶爆破的研究,发现在凹凸不平的台阶面上钻孔时,合理地调整每个炮孔的钻孔深度,可以有效地控制钻孔偏差;在钻孔过程中,钻头通过地层变化的交界面时,适当放缓钻孔速度变钻为磨,也可以有效地控制钻孔偏差。 展开更多
关键词 钻孔偏差 台阶平整 成孔质量
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Atomic layer deposition: Catalytic preparation and modification technique for the next generation 被引量:5
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作者 Hongbo Zhang Christopher L. Marshall 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2019年第9期1311-1323,共13页
Atomic layer deposition(ALD)attracts great attention nowadays due to its ability for designing and modifying catalytic systems at the molecular level.There are several reported review papers published recently discuss... Atomic layer deposition(ALD)attracts great attention nowadays due to its ability for designing and modifying catalytic systems at the molecular level.There are several reported review papers published recently discussing this technique in catalysis.However,the mechanism on how the deposited materials improve the catalyst stability and tune the reaction selectivity is still unclear.Herein,catalytic systems created via ALD on stepwise preparation and/or modification under self-limiting reaction conditions are summarized.The effects of deposited materials in terms of electronic/geometry modification over the catalytic nanoparticles(NPs)are discussed.These effects explain the mechanism of the catalytic stability improvement and the selectivity modification.The unique properties of ALD for designing new catalytic systems are further investigated for building up photocatalytic reaction nanobowls,tandem catalyst and bi-active-component metallic catalytic systems. 展开更多
关键词 Atomic layer deposition Catalyst modification Catalyst preparation Redox properties Terrace site Step site
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