Design of the shotcrete support for the underground powerhouse of Longtan Hydropower Station;

Variation characteristics of tunnel adjacent rock and shotcrete rockbolt support action;

The smooth blasting is the basic condition of the shotcrete rockbolt support, and is the fundamental work for guaranteeing the quality of the shotcrete rockbolt.

This paper makes deep analysis on the problems existing in the actual application of the bolt-spray supports in the sinking and driving engineering, and puts forward some methods and measures for solving these problems.

This paper sketches the popularization and application of the technique of smooth-wall blasting and bolt-spray supports in the tunnels of coal mines, and analyses the economic benefit obtained by popularizing and applying this technique in coal mines.

This paper presents the structure, function, and design method of the software package of a quality management information system of bolt-spray supports engineering.

Methods of improving the result of bolting and shotcreting;

Analysis of factors effecting quality of bolting and shotcreting;

Calculating the parameters of bolting and shotcreting with full-length-cemented bolt;

On the basis of field observations and numerical simulation results,mechanical behaviors and deformation of surrounding rock were contrastively analyzed before and after optimization of bolt-shotcrete support.

The BP network model is established for parameters design of bolt-shotcrete support in tunnels, and the shortcomings of the BP algorithm are improved.

An integrated intelligent method for bolt-shotcrete support design in underground rock excavation is presented.