Field investigations of deformations in soft surrounding rocks of roadway with roof-bolting support by auger mining of thin coal seams

Coal auger mining is a promising technology used for excavating thin coal seams. The efficiency of largely related to the stability mine roadways in influence zone coal-face. Roof bolting systems are such conditions. An adequate choice roof parameters only possible if one understands features stratification rocks and stages deformation array mining. Modern monitoring methods condition based on use mechanical benchmarks, sounding optical devices. There few studies concerning with innovations presented this manuscript determination research results in-situ processes rock around roadway which will help better understand technological method design an support system. Some field were undertaken order investigate geo-mechanical that can be observed while fully grouted bolts 2.4 m length. included telltales, convergence using contour measurements altitude falls, visual observations. show roof-bolting