Directing to the special geology conditions of 8415 face cut hole in Zhuxianzhuang Coal Mine,the experiences of bolting support with wire mesh in the much thicker soft seam are introduced,and the cost of roadway support is also analyzed.

Mechanism of the rib spalling and the controlling in the very soft coal seam;

This paper introduces the overall design scheme of the ZYW—1200R fully hydraulic mine drilling rig, and combining the characteristics of drilling along the soft projecting coal seams, outlines the designing thought and the structural patterns of the main components, the prototype experimental data in the laboratory and the held conditions.

In order to solve the support difficulties of the mining gateway for the fully mechanized top coal caving mining face in soft thick seam of Zhenchengdi Mine,the numerical simulation was applied to the optimized study on the mining gateway support mode and the support parameters.