Abstract Brittleness is a crucial parameter of rock mass and the key indicator in engineerings, such as rockburst prediction, tunnelling machine borehole drilling, hydraulic fracturing. To solve problem using present brittleness indexes, existing indexes were firstly summarised this paper. Then, index (BL), which considers ratio stress drop rate increase peak stress, was proposed. This new has ...

This paper presents a novel Bayesian-based method for predicting brittleness. The involves synthesizing petrophysical data from multiple well cores to establish joint Gaussian distribution function shale facies and non-shale facies. Furthermore, Bayesian classification is applied seismic data. proposed combines with Rickman brittleness obtain new index. are utilized enhance the differentiation ...

Geopolymers are known as high strength and durable construction materials but have a brittle fracture. In practice, this results in a sudden collapse at ultimate load, without any chance of preventing the breakdown of parts or of withstanding the stress for some time. Glass fiber usage as a total anisotropic shape acting as a compact structure component should hinder the fracture mechanism. The...