Study on the random simulation times of mining engineering reliability

来源 :煤炭学报(英文版) | 被引量 : 0次 | 上传用户:lawrence121
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
The theory of Monte-Carlo simulation method is that the event happened probability was estimated by happened frequency in the experiments. So it is very important to ascertain the times of simulation. The probability and statistic theory are used to determine the optimal simulation times through strict mathematic reasoning. The study of two cases is made to show the availability of the presented method, and some relative problems were discussed.
其他文献
By employing numerical modeling, similar material simulation and comprehensive field observation, investigations were made and patterns were obtained governing surrounding-rock stress distribution and strata behaviors. It shows that patterns governing dis
The effect of reinforcing roof, sides and floor corners to control floor heave of extraction opening was analyzed, It was proved by engineering practice and numerical simulation that reinforcing any part of surrounding rock have certainly control effect f
Analyzed the support instable mode of sliding, tripping, and so on, and believedthe key point of the support stability control of fully mechanized coal caving face with steepcoal seams was to maintain that the seam true angle was less than the hydraulic s
A nonlinear creep-damage model for soft rock under uniaxial compression was presented, which takes into account both nonlinear creep and damage growth with time.The model is based on the hardening theory. The model is validated through comparison with exp
In order to obtain the perforation depth, the three zones with different permeability because of plastic deformation and fluid invasion were studied based on related theories. The study shows that the calculation of perforation depth should take account o
The freeway passes over the gob area of the Zaibo coalmine or its neighborhood when it is built. It is a noticeable problem that the construction of freeway and the underground coal mining interact, especially the deformation and destruction of the gob ar
Deduced the propagation rule of longitudinal and transverse wave. On the basis of this, propagation rules in attenuated visco-elastic media and varied Lame coefficient were put forward as well. The subsequent numerical analysis found that in a small scope
Presently most of research results on strata behaviors were concluded under the normaI(moderate)advance rate conditions.Comparing with normal advance rate.fast advance rate and slow advance rate may cause some new changes of strata behaviors.The character
Presented the concept of the natural support strength. The natural support strength, the strike sill, the multifunction retractors (developed by the author) and etc. were used with the technical measures to change the passive support to the initiative sup
In the light of fractal geometry theory, the characteristics of coal\'s electric parameters (including dielectric constant, alternating conductivity, dielectric loss angle tangent and electric polarization constant) were studied by using literature data