Effective gas management is vital to the success of the longwall mining in the Bulli seam, in the Southern Coalfield, Sydney Basin, NSW, Australia. The evolution of gas drainage methods and practices are discussed with respect to gas type, gas drainage lead time and prevailing geological conditions. Both underground to inseam drilling and surface to inseam drilling techniques are described at b...

We present a mixed-integer program to schedule longand short-term production at LKAB’s Kiruna mine, an underground sublevel caving mine located in northern Sweden. The model minimizes deviations from monthly preplanned production quantities while adhering to operational constraints. Because of the mathematical structure of the model and its moderately large size, instances spanning a time horiz...

the paper presents an analysis of both energy intensity and energy demand for the italianindustrial sector. the aim of the paper is twofold: making a decomposition of energy intensity at the aggregate level and modeling energy demand at the firm level. the decomposition of energy intensity shows different patterns for the different sub-sectors in the period of interest. in the micro approach, p...

The migration law of overlying strata on working face is great significance for safe mining face. In this paper, theoretical calculation, numerical simulation, and similar simulation are used to study the distribution characteristics, migration, fracture key in 130204 Y.C.W coal mine relationship between development height water flowing fractured zone spatial position weak aquifer. calculation ...

the management of sedimentation problems in rivers and reservoirs depend greatly on the sediment yield from the catchment land surface. in this research the effects of biological measures and ranges enclose on suspended load in two sub-catchments of kakhk experimentalwatershed in gonabad has been studied. this catchment contains both control and experimental sub-catchments. these sub-catchments...

The valence electronic structure of the half-metallic double perovskite Sr2FeMoO6 forms from a strongly hybridized band in spin-down channel Fe 3d and Mo 4d states that provides metallic conductivity gapped spin-up channel. ground-state description has previously been explored terms many-body interactions where local nonlocal produce with combination charge-transfer configuration intersite char...

Abstract Combining a transition metal dichalcogenide monolayer (ML) and molecular semiconductors is an attractive route for forming nanoscale hybrid van der Waals heterostructures with potentially novel (opto‐)electronic properties. The energy level alignment at the interface governs these properties, but precise determination of interfacial electronic structure challenging due to pronounced ex...

Abstract Ore flow has been identified as one of the critical points developing novel mining method Raise Caving (RC). The focus this contribution is on key issues ore-flow and how to encounter them enable a safe, efficient, economic operation. In de-stressing phase RC, narrow, tabular slots are developed via raises, only blast swell drawn, hence they stay filled with blasted material at all tim...