Permissible delay combined detonator for coal mine

Abstract

The invention discloses a permissible delay combined detonator for a coal mine. The permissible delay combined detonator for the coal mine is used for ensuring the detonator does not cause gas and coal-dust explosion in blasting operation under a shaft. The permissible delay combined detonator mainly comprises a detonator tube, a leg wire, a rubber plug, an electronic detonator delay module, a bleeder resistor Rc, a delay grain and initiating explosive. After a circuit is charged and receives a detonation instruction, if the delay module of the electronic detonator fails to work normally, thecircuit automatically releases stored energy through the bleeder resistor RC, and the problem of delayed explosion of the permissible electronic detonator for the coal mine can be solved. According tothe permissible delay combined detonator for the coal mine, the delay combined detonator technology is adopted, on one hand, a traditional delay powder agent is used as a delay body for delay control, the production process is mature, the delay time can be accurately controlled in 130 milliseconds, the possibility of the gas and coal-dust explosion is effectively avoided, and on the other hand, some advantages of the electronic detonator are utilized, real-time tracing is achieved, online detection can be achieved, networking conditions can be known at any time, control is convenient, and theblasting quality is effectively guaranteed.

Description

technical field [0001] The invention belongs to the technical field of detonator blasting, and in particular relates to a delay combination detonator permitted in coal mines. Background technique [0002] According to the "Coal Mine Safety Regulations", underground blasting operations must use coal mine permitted instantaneous detonators or coal mine permitted delayed electric detonators, among which delayed detonators can effectively reduce the seismic wave effect, reduce the amount of secondary crushing, control ore lumpiness and improve blasting efficiency . After measuring in the high gas mine coal seam, the gas concentration is far below the explosion limit within 130 milliseconds, so the delay time of using the delay detonator shall not exceed 130 milliseconds. The electronic detonator has anti-static, anti-stray current, and anti-electromagnetic radiation capabilities. Each electronic detonator has its own ID code, which is convenient for safety control. In addition,...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems existing in the existing electronic detonators, and provide a coal mine-approved delayed combination detonator, which can solve the problem of delayed explosion of coal mine-approved detonators, and can avoid gas and coal dust explosions at the same time

Images