Developing the bottom ripping machine is important for restoration of the destructed bottom which causes by the mine pressure.

According to the principle of highway road mill machine and mature technology of tunnel loader,propose the plan of develop the tunnel ripping machine,the work installment——mill drum of this machine becomes the most important part to research.

To identify the mechanical properties of stabilized slaking mudstone and possibility as base material of roadway floor,a series of experiments were carried out on specimens prepared at different dosages of solidifying-agent and cu.

This paper deals with the relationship between the floor heave and the gob height and horizontal tectonic stress in panel No.

In this paper,three boundary element models were adopted to simulate the preventive effect of different floor bolt layout on the floor heave.

Floor heave is familiar distortion and damage form in deep soft rock roadway, how to control floor heave effectively and economically is an urgent problem.

Based on the field investigation,model tests and numerical simulation,the features and mechanism of four kinds of floor heave of roadway in deep coal mining are discussed,the major factors affecting the floor heave are analyzed,and recent advance .

Base on the in-situ measurements in soft rocks influence of the wall subsiding on roadwayfloor heave is explained.

This paper delt with the relationship between the floor heave and the gob height and horizontal tectonics stress in panel No.