The analysis of a current state of a problem of effective and safe working off of stocks in complexity mining-and-geological parameters is made. Recommendations about ensuring increase of technical and economic indicators of the coal mines which working off high-gas-bearing layers and spontaneous-combustion coal are made.
The questions of an assessment of production potential are considered here.The defining role of resource potential is given at an assessment of production capacity of mine. Recommendations for determination of rational capacity of mines are given. The necessity of strategic innovative development of coal-mining enterprises is shown.
Existing techniques of an estimation of degree of complexity of mining-and-geological parameters for the forecast of efficiency of economic investments at development of new coal-fields are analyzed. The scheme of typification of stocks on complexity of mining-and-geological parameters both economic efficiency of working off and the technique of grouping of deposits and their sites are offered.
The complex method of a substantiation of ways maintenan to stability of local development excavations in overworked layers is offered. The mark of expected displacement of breeds contour of section local preparatory developments overworked layers is executed. Recommendations about realization overworked systems of working out in the conditions of mine «Raspadsky-koksovaja» are made. Necessity carrying out of developments of 2nd layer with backlog from a clearing face of 1st layer is proved. The mark of influence of parameters of an applied way maintenan to stability of developments on level of production costs is executed.
The analysis of the modern state and perspectives of development of underground coal mining in Kuznetsky coal basin has been carried out. Problems of underground mining of coal seams have been determined. The factors which significantly effect the efficiency of coal mines have been reviewed. The conclusion on necessity of improvement of mining methods for coal seams in complex geological conditions have been made.
Challenges of efficient underground mining of thick flat coal seams are studied. An effective method to secure stability of site development workings in overworked layers is suggested. A conclusion is made on advisability of stress-relief workings construction in preparation of overworked layers. Parameters of slicing mining system and stress-relief workings are justified. Assessment of useful mineral loss enhancement and production cost reduction is made due to introduction of the proposed method. Possible areas are determined for application of this method.
The scheme of approach of evaluation of the stability of underground structures with account for seismic activity of rock strata is introduced. Some aspects of estimation of stability of underground structures under dynamic loads are also present. Methods of choosing the safe parameters of underground mining with account for seismic and tectonic activity of rocks are shown.