The loading ability of straw bale was tested by Electronical Testing Machine. The linear regression equations were proposed between failure density and loading ability, and failure density and compressing energy. Base...The loading ability of straw bale was tested by Electronical Testing Machine. The linear regression equations were proposed between failure density and loading ability, and failure density and compressing energy. Based on an exponent model, the testing coefficients of straw bale were estimated using Levenberg-Marquardt Method. The results of test showed that the relation between failure density and loading ability and compressing energy was linear in the phase of high density. The loading ability of straw bale could meet the building bill.展开更多
Studies have shown that accidents caused by human error account for 70-80% of the total number of accidents,and are the primary cause of casualties.In order to reduce the risk of safety accidents and reduce the human-...Studies have shown that accidents caused by human error account for 70-80% of the total number of accidents,and are the primary cause of casualties.In order to reduce the risk of safety accidents and reduce the human-caused accident rate,the evaluation index of safety occupational adaptability of coal excavation workers has been studied.Questionnaire survey method was used to conduct 13 physical and psychological abilities tests on 50 coal tunneling workers,and select the core ability indicators that reflect the mental load of the workers and the individual priority allocation of psychological resources.Secondly,using the Delphi method and the quartile method,the opinions of 20 experts in related fields were sought anonymously,and the main physical and mental ability indicators were screened and filtered through scoring methods.Finally,six indicators of"accuracy,attention,rapid response ability,proficiency,judgment,and foresight" were determined as the main physical and psychological indicators of coal tunneling workers.This study fills up the gap of safety occupational adaptability in the field of mining construction,and has important theoretical value and practical significance.展开更多
基金Supported by the Returnee Foundation of Ministry of Education and Project (1054hz023)Supported by the Key Research Foundation of Ministry of Science in Heilongjiang Province
文摘The loading ability of straw bale was tested by Electronical Testing Machine. The linear regression equations were proposed between failure density and loading ability, and failure density and compressing energy. Based on an exponent model, the testing coefficients of straw bale were estimated using Levenberg-Marquardt Method. The results of test showed that the relation between failure density and loading ability and compressing energy was linear in the phase of high density. The loading ability of straw bale could meet the building bill.
文摘Studies have shown that accidents caused by human error account for 70-80% of the total number of accidents,and are the primary cause of casualties.In order to reduce the risk of safety accidents and reduce the human-caused accident rate,the evaluation index of safety occupational adaptability of coal excavation workers has been studied.Questionnaire survey method was used to conduct 13 physical and psychological abilities tests on 50 coal tunneling workers,and select the core ability indicators that reflect the mental load of the workers and the individual priority allocation of psychological resources.Secondly,using the Delphi method and the quartile method,the opinions of 20 experts in related fields were sought anonymously,and the main physical and mental ability indicators were screened and filtered through scoring methods.Finally,six indicators of"accuracy,attention,rapid response ability,proficiency,judgment,and foresight" were determined as the main physical and psychological indicators of coal tunneling workers.This study fills up the gap of safety occupational adaptability in the field of mining construction,and has important theoretical value and practical significance.
