The safety production pressure in coal mines is huge, and there is a general phenomenon of over-supporting in roadways.Even hard and dense thick limestone roofs do not dare to be unsupported.1102 track roadways of Qiuji Coal Mine is taken as the engineering background, by constructing a hard roof deformation analysis model, quantifying the role of
Microbial solubilizing of metals in acid environments is successfully used in industrial bioleaching of ores or biomining to extract metals such as copper, gold, uranium and others.This is done mainly by acidophilic and other microorganisms that mobilize metals and generate acid mine drainage or AMD, causing serious environmental problems.However,
The aim Detectors of this study is to analyze the relationship between the sector of the conducted business and the approach to the ownership and rental of real estate used for business purposes, particularly considering the short-term aspect and space sharing.The research uses data obtained from 102 randomly selected Polish enterprises to explore
Abstract Visual systems have evolved to discriminate between different wavelengths of Multi-pin light.The ability to perceive color, or specific light wavelengths, is important as color conveys crucial information about both biotic and abiotic features in the environment.Indeed, different wavelengths of light can drive distinct patterns of activity