Abstract In deep underground mining, achieving stable support for roadways along with long service life is critical and the complex geological environment at such depths frequently presents a major challenge. Owing to coupling action of multiple factors as high stress, adjacent faults, cross-layer design, weak lithology, broken surrounding rock, variable cross-sections, wide sections up 9.9 m, ...

We recently described the glucosinolate transporters GTR1 and GTR2 as actively contributing to the establishment of tissue-specific distribution of the defense compounds glucosinolates in vegetative Arabidopsis plants. Upon bolting and thereby development of the inflorescence and initiation of seed setting, the spatial distribution of glucosinolates does undergo major changes. Here we investiga...

Cytosolic NADPH can be directly oxidized by a calcium-dependent NADPH dehydrogenase, NDB1, present in the plant mitochondrial electron transport chain. However, little is known regarding the impact of modified cytosolic NADPH reduction levels on growth and metabolism. Nicotiana sylvestris plants overexpressing potato (Solanum tuberosum) NDB1 displayed early bolting, whereas sense suppression of...

The deformation control of roadways surrounded by rock in the fully mechanized amplification sections extra-thick coal seams is problematic. To analyze failure and characteristics a support frame, as well processes surrounding rock, through theoretical analysis industrial tests, conditions return airway caving face an seam Yangchangwan Coal Mine, Ningdong mining, area were examined. Combined wi...

The paper presents a method of modelling the mechanical behavior supported rock mass, in vicinity complex underground structures. is based on calculations effective properties bolted mass. algorithm unit that are obtained by conducting series numerical experiments. These experiments allow to define values correction factors, which, turn, determine difference and non-supported Such approach make...

Among underground coal miners, hearing loss remains one of the most common occupational illnesses. To address this problem, the U.S. National Institute for Occupational Safety and Health Office of Mine Safety and Health Research (NIOSH OMSHR) conducts research to reduce the noise emission of underground coal mining equipment, an example of which is the roof bolting machine. Field studies show t...

Purpose. The published studies are aimed at determining the mechanism of deformation rocks contour around workings in terms parameters emerging fracturing and their dependence on indicators strength depth occurrence massif. tasks study include installation fracture indicators, determination development process working, including effect longwall mining taking into account possibility reuse worki...

Ambient Vibration-Based Structural Health Monitoring (AVB–SHM) studies on prone-to-fall rock compartments have recently succeeded in detecting both pre-failure damaging processes and reinforcement provided by bolting. The current AVB–SHM instrumentation layout is yet generally an overkill, creating cost power issues sometimes requiring advanced signal processing techniques. In this article, we ...