Ground characterization and roof mapping: Online sensor signal-based change detection

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• 作者：Soheil Bahrampour^a ; Jamal Rostami^b ; ^{jur17@psu.edu" class="auth_mail" title="E-mail the corresponding author} ; Asok Ray^a ; Ali Naeimipour^b ; Craig Collins^c
• 关键词：Measurement while drilling systems ; Roof mapping ; Void detection ; Online change detection
• 刊名：International Journal of Mining Science and Technology
• 出版年：2015
• 出版时间：November 2015
• 年：2015
• 卷：25
• 期：6
• 页码：905-913
• 全文大小：1925 K

文摘

Measurement while drilling systems are becoming an important part of excavation operations for rock characterization and ground support design that require reliable information on rock strength and location & frequency of joints or voids. This paper focuses on improving rock characterization algorithms for instrumented roof-bolter systems. For this purpose, an improved void detection algorithm is proposed, where the underlying theory is built upon the concept of mean change detection based on the feed pressure signals. In addition, the application of acoustic sensing for void detection is examined and it is shown that the variance of the filtered acoustic signal is correlated to the strength of the material being drilled. The proposed algorithm has been validated on the data collected from full-scale drilling tests in various concrete and rock samples at the J. H. Fletcher facility.