Experimental Study On The Delay Precision Of The Coal Mine Ms Delay Electric Detonator

With the continues improvement of blasting technology,the performance of the blasting equipment requirements are also getting higher and higher. As a mine detonating equipment millisecond delay electric detonators, delay accuracy of its direct impact on blasting safety and blasting effects.The topic for the coal mine permissible ms delay electric detonator delay factors affecting the precision of experimental study. Analysis of the various processes of the coal mine allowable of ms electric detonators processing and manufacturing process to identify the impact of coal mine allowable of the millisecond delay electric detonators delay precision of a variety of factors,and in-depth study of various factors to determine a more reasonable process parameters to improve the accuracy of mine millisecond delay detonators.Experiment was completed more than three years experience of specific test items 15,consuming a total of nearly 3000 made detonators,respectively,affecting the extension of the accuracy of four aspects,the delay compositions and the accuracy of the delay element and storage conditions and detonators manufacturing process.Specific study as follows.1. For delay composition as an object of study,respectively,the ratio of the delay composition,grain size, mixing uniformity and ambient temperature,humidity and other factors that affect the delay of the accuracy of the various studies,through a delay of time testing and analysis of the results,preparation of the drug reached the optimum parameters of delay and thus to achieve purposes of the greater delay precision.2. For delay body manufacturing processcarried out experimental research the following conclusions:(1) The delay of body drawing process, using medicine core diameter of 0.5～0.7mm,the drug core compaction, uniform,can not afford to drugs, delay and high accuracy.(2) The delay time of the delay body with the cut of the delay element long fundamental proportion, but with the positive relationship between the increase in cut length is not significant. Reduce the delay of body length bias-cut, which can effectively control the delay of precision .3. By coal mine permissible millisecond delay electric detonator assembly process of experimental research into a master of the electric ignition components of drug head and chamber size and the card shut India diameter of the impact of delay accuracy, through the detonator assembly process of the strict control of the parameters, reducing the processing on the delay of the impact of precision, thus achieving the purpose of improving the accuracy of an extension.