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<正> 预防和控制瓦斯爆炸事故已成为广大职工的迫切愿望,也是当前煤矿——特别是乡镇煤矿安全生产的重大课题。如何杜绝瓦斯爆炸事故,除防止瓦斯超限外,消灭引爆火源是预防瓦斯爆炸的 相似文献
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从瓦斯爆炸的基本条件入手,分析了瓦斯爆炸事故发生的主要原因,得出煤矿瓦斯爆炸事故是瓦斯积聚和引爆火源、自然条件、安全技术手段、安全装备水平、安全意识和管理水平等多种因素共同作用的结果。在此基础上从控制瓦斯浓度、杜绝火源及制定合理的事故应急预案等方面提出防止瓦斯爆炸事故的基本措施。 相似文献
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<正> 第一部份 瓦斯爆炸的条件及影响因素一、瓦斯的成分及爆炸性瓦斯爆炸历来都是煤矿的主要灾害之一,造成成千上万人的死亡,我国1970~1980年期间,发生重大瓦斯爆炸事故百余起,死亡数千人,为了防止瓦斯爆炸事故,必须很好地了解瓦斯爆炸的发生、发展规律。 相似文献
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煤矿瓦斯特征与风险评价 总被引:2,自引:0,他引:2
该文根据事故致因理论,结合煤矿瓦斯爆炸的特征,对煤矿瓦斯的辨识作了一定的研究探讨,给出了瓦斯爆炸风险性的半定量评价模型和瓦斯爆炸事故危险度的计算方法。所建立的模型可以量化矿井瓦斯爆炸可能性,为防止瓦斯爆炸提供量化指标。 相似文献
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通过对江源县各煤矿发生的3起瓦斯爆炸事故分析,受巷柱式采煤方法的限制,采掘工作面是瓦斯爆炸事故的多发地点。因此,加强采掘工作面的通风管理和重点预防采掘工作面的瓦斯,对防止煤矿瓦斯爆炸事故具有重大的意义。 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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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
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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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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. |