某钨矿平巷掘进微差爆破间隔时间识别

Delay Time Identification of Drift Driving Millisecond Blasting in a Tungsten Ore

在平巷掘进爆破中采用延时技术，合理设计微差时间可使炸药能量得到充分分配和利用，达到最优爆破效果。根据某钨矿平巷掘进采用50ms微差爆破的设计，应用B1astrnateIII型爆破测振仪对爆破进行监测，在此基础上，依据雷管引爆炸药激起能量密度突变原理，选取db8作为小波基，借助Matlab完成了3～10小波变换尺度积分求取的时一能密度进行微差爆破延时识别，结果表明，相邻段别雷管的延时时间依次为0ms、46．39ms、50．78ms、57．13ms，符合平巷掘进50ms微差延时爆破要求，雷管性能稳定可靠。该方法可应用于平巷掘进中的毫秒微差雷管的可靠性识别。

The detonator energy can be fully utilized by delayed millisecond timing in drift driving blasting to achieve optimal blasting effects. Blasting vibrating meter with the model of Blastmate III is applied to supervise the blasting in a tungsten mine＇s drift driving with 50 ms delayed blasting. 3 - 10 scale time-energy on the wavelet transform is used to identify the differential blasting delay withing MATLAB based on the energy-density mutation out of detonator blasting. The results show that the adjacent segments of detonator delay time are 0 ms, 46.39 ms, 50.78 ms and 57.13 ms respectively. These figures conform to the requirements of 50 ms millisecond blasting in drift driving with reliable detonator performances.