A new hybrid model of information entropy and unascertained measurement with different membership functions for evaluati
- PDF / 5,373,632 Bytes
- 19 Pages / 595.276 x 790.866 pts Page_size
- 46 Downloads / 175 Views
ORIGINAL ARTICLE
A new hybrid model of information entropy and unascertained measurement with different membership functions for evaluating destressability in burst‑prone underground mines Jian Zhou1 · Chao Chen1 · Kun Du1 · Danial Jahed Armaghani2 · Chuanqi Li1 Received: 13 July 2020 / Accepted: 17 August 2020 © Springer-Verlag London Ltd., part of Springer Nature 2020
Abstract The occurrence of unpredictable hazards are frequent with the increased depth of mining, especially the hazards caused by stress concentration. In order to mitigate the negative effectiveness results from mining-induce stress, various approaches have been employed in underground mines. Destress blasting, as an efficient method, has gained a lot of popularity in recent years. However, it is crucial to estimate the destressability of specific area before conducting destress blasting. In this study a combination model on the basis of both unascertained measurement (UM) and entropy coefficients was applied to observe the performance of destressability evaluation. Eight representative parameters, i.e., stiffness of the rock mass, brittleness of the rock mass, degree of fracturing, proximity to failure, destress blast orientation, width of the target zone, unit explosive energy, and confinement of the charges were chosen as initial input parameters, and their membership distributions were described by four types of membership methodologies, i.e., line, parabolic curve, exponential curve, and sine curve. Meanwhile, the weights of each index could be computed based on the single measurement matrix. Then, destressability of the samples was easily identified with Euclidean distance and comprehensive measurement vectors which were computed by single measurement vectors and weight coefficients. Finally, it was found that the assessment results are in accordance with those calculated by destressability index. It can be concluded that the proposed hybrid model is able to eliminate the disturbance of subjective factors and ensure the reliability of these outcomes. At the same time, it can provide a novel idea/ process for the destressability evaluation. Keywords Rockbursts · Destressability · Unascertained measurement · Entropy coefficients
1 Introduction * Kun Du [email protected] Jian Zhou [email protected] Chao Chen [email protected] Danial Jahed Armaghani [email protected] Chuanqi Li [email protected] 1
School of Resources and Safety Engineering, Central South University, Changsha 410083, China
Department of Civil Engineering, Faculty of Engineering, University of Malaya, Lembah Pantai, 50603 Kuala Lumpur, Malaysia
2
As the shallow solid mineral resources are getting exhausted, the aim of mining excavation is focused on deeper ground, where a considerable volume of natural hazards such as rockbursts (RB), water inrush and roof fall (which may seldomly happen at shallow surface) frequently occur [1, 2]. These uncertainty factors, existing in the mining workface, can destroy the underground facility and equipment, an
Data Loading...
