The utilization of solid wastes (SWs) as a potential resource for backfilling is not only conducive to environmental protection but also reduces the surface storage waste. Two types SWs, including fly ash (FA) and desulfurized gypsum (DG), were used prepare cementitious materials underground mined-out areas. Ordinary Portland cement (OPC) was in mine backfill. To better investigate feasibility ...

Abstract The mechanical properties of frozen rocks vary significantly from the same lithology under ambient temperature. goal this paper is to investigate these changes in physical and due saturation freezing. Besides, attention was paid on discovering new correlations between characteristics. To fulfill objectives, 36 uniaxial compressive strength tests, Brazilian splitting 48 point load tests...

The stability of composite material that is composed roof rock, cemented paste backfill (CPB), and floor rock has an important impact on safe mining within metal mines. In order to explore the mechanical properties, acoustic emission (AE), energy dissipation, damage evolution roof–CPB–floor (RCF) layered materials, uniaxial compression (loading rate 0.02 mm/min) AE tests RCF materials with diff...

The uniaxial compressive strength of rock is one the important parameters characterizing properties masses in geotechnical engineering. To quickly and accurately predict rock, a new SSA-XGBoost optimizer prediction model was produced to 290 samples. With four parameters, namely, porosity (n,%), Schmidt rebound number (Rn), longitudinal wave velocity (Vp, m/s), point load (Is(50), MPa) as input ...

Slope instability in the Butterfly Biosphere Reserve (RBMM) Michoacán, Mexico, is a widespread phenomenon that results from complex interaction among different factors such as climate, slope, and spatial distribution of rock units. The climate temperate subhumid, with rains summer an annual average rainfall 700 to 1250 mm. main physiographic units area are volcanic mountains, slopes greater tha...

assessment of the correlation between rock brittleness and rock fracture toughness has been the subject of extensive research works in the recent years. unfortunately, the brittleness measurement methods have not yet been standardized, and rock fracture toughness cannot be estimated satisfactorily by the proposed indices. in the present study, statistical analyses are performed on some data col...

The weakly cemented sandstone is widely distributed in the Western Mining Area, which mainly formed by mineral grains and minerals through compaction cementation. To study influence of grain size on mechanical properties acoustic emission (AE) characteristics sandstone, uniaxial compression Brazilian splitting AE tests were carried out four specimens with different sizes. physical properties, b...

Cemented paste backfill (CPB) comprising mineral tailings, binders and mixing water is an important potential support material in the mining industry. As mechanical properties of CPB are significantly influenced by its microstructural characteristics development measurement tools to better understand pore structure evolution for increased utilisation. This study reports application low-field nu...

The effectiveness of silica sol grout on mudstones is reported in this paper. Using X-ray diffraction (XRD), the study investigates how the silica sol grout modifies mudstone mineralogy. Micropore sizes and mechanical properties of the mudstone before and after grouting with four different materials were determined with a surface area/porosity analyser and by uniaxial compression. Tests show th...

Abstract The geomechanical characteristics of a drill formation are uncontrollable factors that crucial to determining the optimal controllable parameters for drilling operation. In present study, data collected in wells drilled Marun oilfield southwestern Iran were used develop adaptive network-based fuzzy inference system (ANFIS) models parameters. specific energy (DSE) was calculated using s...