The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Human, machines and environment, three main factors contained in transport system in coal mines, and their impact on transport accident have been analyzed with system engineering theory of man-machine-environment in this article. Reasons and control of human mistakes, relationship between human and transport accident, analysis of machines' stability and fuzzy comprehensive evaluation have been deeply...
In order to increase dust measurement precision and real-time capacity, an improved dust monitoring system was presented. One master with three extensions was adopted at measuring point and the data fusion was adopted. Furthermore, to solve the problem of coal-dust explosion limit reducing once the gas gathering occur, the explosion parameters were detected by multi-sensor and the information of dust,...
There are many uncertainties which have the characteristics of high investment and high risk in coal-bed methane underbalanced drilling. If the potential risk and its state can be predicted in advance, the probability of risk occurrence will be reduced to the minimum extend. On the basis of risk identification of coal-bed methane underbalanced drilling, it concludes that the drilling risks mainly...
The safety investment and benefit of coal has two characteristics: fuzziness and gray character. Considering the limited consideration of safety investment of coal, a mathematic method based on fuzzy-gray relational degree is proposed, a synthesized relational degree is formed by connecting the gray relational degree and Oushi distance of fuzzy sets. Based on the contents as concept of coal mining...
Based on systematic collection of the hydrogeological data of coal mine, we analyzed the factors affecting water inrush from coal floor and determined the major factors. We used the fuzzy clustering method to evaluate the water inrush risk from coal floor in order to solve the evaluating limitation of water inrush risk from coal floor by the water inrush coefficient method. The fuzzy clustering method...
The thin coal mining equipment multi-rank choice and it is traditional choice method subjective capriciousness question, This paper is intended to discuss and analyze the assessment of mining method by the utilization fuzzy set and fuzzy mathematic theory, the equipment to carry on the multi-ranks to decompose, carries on the quantification recursive operation according to the normalizing formula,...
Coal mine safety evaluation analyses mine's existent dangerous and harmful factors, and judges mine's potential risks. The evaluation result is propitious to guard against accidents and make management decisions. This paper analyses all kinds of influence elements on coal mine safety, constructs evaluation indexes system, measures weights using AHP, and applies dynamic fuzzy theory in mine safety...
This paper introduces fuzzy evaluation based multisensor information fusion technology to process the data that obtained with various environmental sensors in the coal mine monitoring system. Through the synthetic operation with the decision rule at the data fusion center, the accurate state parameter estimation of the environment was obtained. Software instrument is introduced in the environment...
The core of fuzzy evaluation on the safety of belt conveying system is membership degree transformation. But the existing transformation methods should be questioned, because redundant data in index membership degree is also used to compute object membership degree, which is not useful for object classification. The new algorithm is: using data mining technology based on entropy to mine knowledge...
A novel alarming assessment model of coalmine gas is presented in this paper. Based on the information fusion technique of multi-sensor, we introduce the thought of variable fuzzy set to assess complicated and risk coalmine gas. Through information fusion we can get more effective and reliable data about coalmine gas. The method for variable fuzzy set theory can reasonable identify the relative membership...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.