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采空区密闭浇筑工艺的改进与应用 被引量:2
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作者 郝国庆 《煤》 2018年第10期46-47,共2页
为了解决采空区密闭施工后由于密闭质量问题造成的采空区瓦斯泄露,将由料石或砖体施工密闭的工艺改造为使用混凝土配合钢筋浇筑施工密闭的工艺。通过现场实际使用,浇筑密闭的工艺优点及使用效果明显,克服了普通密闭存在的强度、密度、... 为了解决采空区密闭施工后由于密闭质量问题造成的采空区瓦斯泄露,将由料石或砖体施工密闭的工艺改造为使用混凝土配合钢筋浇筑施工密闭的工艺。通过现场实际使用,浇筑密闭的工艺优点及使用效果明显,克服了普通密闭存在的强度、密度、后期维护方面的不足,对提高矿井通风设施的安全性、可靠性具有较大意义。 展开更多
关键词 密闭质量 普通密闭 浇筑密闭
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采空区煤层自燃发火综合治理
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作者 韩兴荣 《浙江煤炭》 2002年第1期13-15,共3页
通过对采空区煤层自燃发火原因分析,提出预防和处理采空区煤层自燃发火综合治理措施,有效消除采空区自燃发火。
关键词 采空区煤层 自燃发火事故 事故原因 地质 通风管理 开采设计 技术管理 治理措施 密闭质量 均压技术
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Thermal Energy of Confined Gravitons can Vary Cold Geodesic Curves
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作者 Igor E. Bulyzhenkov 《Journal of Physical Science and Application》 2014年第7期468-474,共7页
Internal energy of real warm bodies can change their kinetic-potential energy balance on Keplerian orbits and relativistic geodesic. Chiral nature of the mass results in chirality of gravitons and their energy confine... Internal energy of real warm bodies can change their kinetic-potential energy balance on Keplerian orbits and relativistic geodesic. Chiral nature of the mass results in chirality of gravitons and their energy confinement within the constant energy charge of a moving thermodynamical body. Zero energy-momentum gravitons provide dissipative self-heating and spiral fall of massive stars on gravitating centers. Computed self-heating of the pulsar PSR B1913+16 quantitatively describes its period decay without an outward emission of metric waves in question. Deviation of warm bodies from geodesic trajectories of cold point matter complies with Einstein's directives toward pure field physics of material space plenum without metric singularities. 展开更多
关键词 Zero particles chiral graviton SELF-HEATING thermal time evolution.
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Clinical manifestations of low bone mass in amenorrhea patients with elevated follicular stimulating hormone
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作者 郁琦 林守清 +4 位作者 何方方 李包罗 林元 张涛 张颖 《Chinese Medical Journal》 SCIE CAS CSCD 2002年第9期1376-1379,153,共4页
OBJECTIVE: To study the characteristics of low bone mass in amenorrhea patients with elevated follicular stimulating hormone (FSH). METHODS: Amenorrhea patients with elevated FSH: Primary amenorrhea 18 cases, secondar... OBJECTIVE: To study the characteristics of low bone mass in amenorrhea patients with elevated follicular stimulating hormone (FSH). METHODS: Amenorrhea patients with elevated FSH: Primary amenorrhea 18 cases, secondary amenorrhea 171 cases and age matched controls with normal menstruation, 180 cases. The descriptive parameters were: estrogen, alkaline phosphatase, urinary excretion of calcium to creatine ratio, cortical bone mineral density at the right radius measured by single photon absorptiometry and trabecular bone mineral density at the lumbar vertebra body measured by quantitative computerized tomography. RESULTS: Average E(2) levels in amenorrhea patients is under 150 pmol/L with significantly higher alkaline phosphatase and urine calcium to creatine ratio values than the normal menstruation group. Cortical bone mineral density in the secondary amenorrhea group (655 +/- 69 mg/cm(2)) was significantly lower than that of the normal menstruation group (677 +/- 56 mg/cm(2), P 展开更多
关键词 Bone Density ADULT Age Factors AMENORRHEA Bone and Bones ESTRADIOL Female Follicle Stimulating Hormone Humans MENOPAUSE Middle Aged
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