Entity

Time filter

Source Type


Hu J.-H.,Central South University | Hu J.-H.,Key Laboratory of Deep Mining and Disaster Control in Hunan Province | Shang J.-L.,Central South University | Shang J.-L.,Key Laboratory of Deep Mining and Disaster Control in Hunan Province | And 4 more authors.
Zhendong yu Chongji/Journal of Vibration and Shock | Year: 2013

There exist complicated non-linear relations between explosive vibration effect and its affecting factors, and accurate prediction of the attenuation law of blasting vibration is the basis of blasting design and disaster control. Based on the analysis of defects of traditional Sadaovsk formula, a modified Sadaovsk formula (MSF) considering the height deviation between mass point and blast center was introduced. A multiple linear mathematical model for predicting the attenuation law of blasting vibration was established. The unknown parameter vectors(K, α, β) in the model were calculated by using least square method, thus the concrete MSF for accurately predicting the attenuation law of blasting vibration was achieved. The single-hole blasting vibration of the zinc-copper deposit in Tongkeng Mine was monitored and the data were analysed by using the proposed method. The results show that the proposed MSF is reliable, and can provide scientific guide for blasting design in zinc-copper deposit. Source


Shang J.-L.,Central South University | Shang J.-L.,Key Laboratory of Deep Mining and Disaster Control in Hunan Province | Hu J.-H.,Central South University | Hu J.-H.,Key Laboratory of Deep Mining and Disaster Control in Hunan Province | And 4 more authors.
Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering | Year: 2013

In this paper, in order to improve the present methods of rock blastability classification, a prediction model of game theory-matter-element extension for blastability classification was established. Firstly, based on the analysis of main causes of blastbility, three indexes were chosen as the evaluation indicators and the classification standards were confirmed. Meanwhile, in order to remedy the defect of the correlation function cannot be calculated when the eigenvalue exceeds the controlled field, the blastability classification standards were normalized. Secondly, based on the game theory, the synthetic weight values of eigenvalue were determined by integrating the objective-dynamic weight and subjective-static weight, which can solve the problems occurred in traditional matter-element extension assessment method, that is, the indicator weight only depends on the eigenvalue, and ignores the significance of feature. Finally, the classification of blastability was predicted by using the maximum incidence degree criterion, and the prediction model of game theory-matter-element extension for blastability classification was proposed. The application results show that the blastability of surrounding rock and ore body in the roof is of medium-grade, and the surrounding rock in footwall is of relatively low-grade. The predication results agree well with the project reality geological situation, thus, the corresponding control measures about the blasting in mine engineering were put forward. Source

Discover hidden collaborations