This paper analyzes the conditions of adopting the full-face one-step smooth blast tunneling technique in the construction of the tunnel elongation,expounds the principles of selecting the technical parameters,and puts forward some concrete measures for guaranteeing the construction quality.

This article research how to make the most of development roadway's drivage width,by using simple turnout to solving empty and heavy mine car dispatching,and gain the easy,quick,economic end.

in developing entry of Huayuan coal mine,the authors analyzed and studied the structural changes of wall rock caused by the blasting shocks,thus many kinds of practical union supports are adopted in field construction to guarantee the project supports quality and the construction security,especially in main rail tunnel.

Based on the application of artificial neural networks method, it sets up the artificial neural networks model for the evaluation on the degree of difficulty of top coal caving of roadway caving method in steep medium-thickness and high seam The model is made use of forecasting the technical-economic indexes of coal face and optimizing the technological parameters of roadway caving metho

: This paper discusses the concept of main development tunnels and the classifications of development methods and describes the application of all kinds of development methods in gold mines.