A study to estimate land surface movement caused by large surface excavations in sedimentary strata is presented.In stratified or jointed strata the stress reli
Hydraulic slotting can induce drill spray in a gassy,low permeability coal seam.This then influences subsequent gas extraction.This paper describes the drill sp
The microflotation of three single minerals,mixed coal–kaolinite and mixed coal–montmorillonite were examined to study the effects of clay and calcium ions on
In order to utilize low-grade manganese ore resources effectively, a hydrometallurgical process was developed for manganese extraction in dilute sulfuric acid m
The main purpose of the present study was to provide a practical,convenient drillability prediction model based on rock mass characteristics,geological sampling
习近平总书记指出:“我们要从巩固全党全国各族人民团结奋斗的共同思想基础、巩固党的执政地位的战略高度,持续加强社会主义核心价值体系建设,把培育和弘扬社会主义核心价值观作
In Huojitu Coal Mine of Shendong mining area, the dynamic strata pressure (DSP) accidents occurred when the working faces passed the gully terrain. Focusing on
政治只有落实在现实生活中才有意义,对于中国特色社会主义同样如此。中国特色社会主义作为马克思主义中国化最具创新性的集合体,不仅以社会主义初级阶段为总依据、以政治、经济
Under the combined influences of special topography and the long term mining in Nanfen Open Pit Iron Mine, many large scale landslide masses appeared in heading