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介绍了某煤矿发生的一起瓦斯爆炸事故,对其爆源和爆源点进行了分析,并通过FLUENT模拟分析软件对事故进行了模拟验证,总结了该煤矿此次事故暴露出来的问题及教训,可对类似条件的矿井的安全生产提供参考。 相似文献
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针对煤矿爆破作业中拒爆事故时有发生的现状,为预防井下爆破作业事故发生,通过对煤矿爆破串联网路起爆条件、起爆电流、发火冲能的理论研究,分析了拒爆事故发生的原因。结果表明:雷管的质量缺陷、电学不均匀性以及起爆器材不匹配、网路阻值过大是造成井下拒爆事故发生的主要原因;针对爆破网路拒爆发生的原因,从雷管、起爆器、爆破网路、爆破工艺方面,提出了符合煤矿实际的预防措施。 相似文献
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煤矿开采是高危职业,在操作中可能出现一些事故,其中电气设备失爆出现的概率占据较大份额。在很多情形下,电气设备失爆问题成为了煤矿井下的重大安全事故的根源。电气及仪表设备的失爆问题不仅会给煤矿企业带来经济损失,还会在一定程度上浪费煤炭资源。更为关键的是,该事故严重威胁了职工的生命安全,也减缓了我国煤矿行业健康发展的速度。所以,无论是从经济效益或者社会发展的角度考虑,防止并消除电气设备失爆问题都是十分必要的。通过剖析电气设备失爆问题的成因及有关现象,提出针对性的防失爆策略,最后,对煤矿企业在电气设备失爆检测方面的未来发展趋势进行分析。 相似文献
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近年来,由于各种原因,爆破作业中产生拒爆或残爆的现象不断发生,并时而造成伤人事故,不仅影响了爆破效果,更为严重的是影响了煤矿的安全生产。因此,分析煤矿井下爆破作业产生拒爆的原因及其防治处理措施,意义重大。 相似文献
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煤矿热动力灾害被分为瓦斯、火灾、煤尘等灾害分支,未能形成完整的体系,导致其防治缺少系统性和综合性。对国内外发生的煤矿重特大事故进行了系统调研与总结,提出了煤矿热动力灾害概念,构建了煤矿热动力灾害学内容体系。重点对煤矿热动力灾害中的一些热点问题进行了分析,指出了在瓦斯与煤着火的复合灾害、低瓦斯矿井的安全性、抽采瓦斯在防治瓦斯事故中的作用、事故与管理的关系、注惰性介质防灭火的有效性、矿井隔爆设施的作用、事故中的人员逃生等问题上的认识误区。 相似文献
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早爆极易造成重大人员伤亡事故,本研究针对早爆引起的原因进行分析,提出防范措施,并制定了早爆事故应急预案。对安全生产中避免早爆事故的发生,以及事故发生后的应急处理,有一定的指导作用。 相似文献
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New, more exact approximated solution to the direct problem of identifying a signal of a vertically oriented magnetic dipole
on a borehole axis is reported. This solution makes possible to process the data of the high-frequency induction logging isoparametric
sounding, including negative values of the measured phase difference. The new approximation enables taking into account the
variable borehole radius that is of special importance when a highly-conductive drilling mud is used. As the obtained expression
is explicit, it can be used for the quick data processing and for solving inverse problems of the borehole geophysics.
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Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 4, pp. 3–9, July–August, 2006. 相似文献
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1. | A working and a rock mass around it may be defined by one dimensionless parameter λ≥0. This parameter predetermines the behavior of the rock mass with any changes of mine pressure and support resistance. |
2. | With 0≤λ<1 prediction of the behavior is clear: Reaction of the rock mass to any changes in mine pressure and support resistance will have a stable character. |
3. | If λ>1 then stability for the reaction is only retained up to a certain critical condition. Parameters of the critical condition depend on mine pressure, the degree of weakening at contacts between blocks, geometrical dimensions and elasticity moduli. With a changeover through the critical condition there is uncontrolled dynamic release of potential elastic energy for the rock mass. |
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I. D. Chashchin 《Journal of Mining Science》1991,27(4):337-343
Institute of Mining, Siberian Branch, Academy of Sciences of the USSR, Novosibirsk. Translated from Fiziko-Tekhnicheskie Problemy
Razrabotki Poleznykh Iskopaemykh, No. 4, pp. 77–85, July–August, 1991. 相似文献
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Conclusions The deformation of the blocky mass around a working can be interpreted as displacement of the material in a convergent radial
channel with an aperture angle of 360°. A kinematic scheme permitting the formulation of the problem in statically determined
form (similar to the classical scheme for calculation of the pressure of the earth at a supporting wall) is constructed.
Axisymmetric solutions for different levels of block interaction on contact are given. Estimates of the carrying capacity
are obtained in the case of rigid-plastic contact between the block and in conditions of dry friction. It is shown that this
scheme admits of transition in the limit to the accurate solution of the Lame problem in the continuum formulation.
Cases in which increase in the relative slip between the blocks leads to decrease in the interaction force between them (weakening)
are considered. With slight weakening, the deformation is a stable process. If the weakening is greater than a critical level,
the solution becomes unstable, which indicates the uncontrollable release of stored elastic energy from the mass.
Institute of Mining, Siberian Branch, Academy of Sciences of the USSR, Novosibirsk. Translated from Fiziko-Tekhnicheskie Problemy
Razrabotki Poleznykh Iskopaemykh, No. 6, pp. 7–15, November–December, 1990. 相似文献