The severe floor heave in gob-side entry retaining is the major restriction factor of the wide application of pillarless mining thin coal seams.Reinforcement and stress-relief floor heave control methods are the most promising.However, in practice, floor restoration is widely used.Therefore, floor heave control technology in gob-side entry retainin
For problems of independence and incorrect data assessment of grease gun ww2 reproduction monitoring systems of coal mine, the paper proposed a scheme of information integration system with multi-network of coal mine, gave structure and working principle, discussed key technologies, and imagined application of the system in coal mine.The system can
Abstract The strong cosmic censorship conjecture, whose validation asserts the deterministic nature of general relativity, has been studied for charged BTZ black holes in three dimensional general relativity, as well as for Nth order pure Lovelock gravity in d=2N+1 spacetime dimensions.Through both analytical and numerical routes, we have computed
Although chili rasbora for sale sustainability issues disproportionately affect disenfranchised populations, justice considerations are often left to social scientists in sustainability research.As early-career researchers pursuing doctoral degrees in diverse disciplines focusing on sustainability, we reflect on the unintentional exclusion of justi
Gingival recession is an apical migration of gingival margin that is a common finding on patients with meticulous oral hygiene and periodontitis patients.Several surgical treatment techniques of gingival recession have been described.The most challenging situation is the presence of multiple adjacent recession defects.15 patients with total of 53 r