Coal gangue produced during coal production not only poses a serious threat to the ground environment but also imposes economic burdens on mine. The partial-filling mining (PFM) method proposed in this paper can make full use of and is great significance prevention control water disasters at working face. specific process used implement first divide face into several narrow faces then fill fill...

Compared with that of equal-length working faces, the mechanical evolution mechanism overburden rocks in “knife handle”-type mining sites is more complex. The form roof fracture knife handle-type mines variable, and stress distribution near interface concentrated, thereby severely threatening safety mining. To elucidate characteristics fully mechanized top-coal caving sites, geological conditio...

Studies regarding the reuse of a gob-side roadway formed by N00 longwall mining method are scarce. To investigate mine pressure behavior characteristics during reuse, anchor cable force, roof-to-floor deformation, and working resistance hydraulic support obtained from verification face were analyzed. Test results show that influence range mining-induced was 0-90 m in front face. The ratios firs...

The geomechanical model is proposed and the technology of numerical simulation developed. Carried out computer state being undermined repeatedly rock massifs 3 rd potash level Starobin deposit taking into account its structural strength features, as well technological schemes primary mining. regularities stress-strain zones formation in mass containing mined mine workings inter-panel pillars we...

due to the rapid growth of data mining technology, obtaining private data on users through this technology becomes easier. association rules mining is one of the data mining techniques to extract useful patterns in the form of association rules. one of the main problems in applying this technique on databases is the disclosure of sensitive data by endangering security and privacy. hiding the as...