The failure features of roof coal between top and bottom slice are thoroughly studied.

Design and application of horizontal long borehole for gas drainage in seam roof;

There are 6 types of REEs in coals and seam roofs: water\|soluble state (Ⅰ), ion\|exchangeable state(Ⅱ), carbonate state(Ⅲ), organism\|bonded state(Ⅳ), sialic state(Ⅴ),and sulfide state(Ⅵ).

Aqueous characteristics of No. 3 coal roof sandstone in Yanzhou mining area;

Based on the analysis on seismic attributions,an analysis method of seismic attributes and prediction method of lithologic characters based on a BP artificial neural network were proposed for forecasting the mudstone percentage content of coal roof.

Research on the tectonic synthesis method of prediction roof stability and its application;

A research on the relation between mining caused coal seam roof fissures and mine gas distribution

Analysis the height of water conducted zone of coal seam roof based on GA-SVR

According to the actual situation of the applying of anchor wire support in Xin Zhouyao Coal Mine, this article introduces how to put it into practical use under the conditions of coal seam roof and broken rock roof, and analyses its supporting and economy effect.