Study On Strata Behavior And Conrolling Technology Of Floor Roadway Affected By Overhead Mining

Subject to overhead-mining coal working face of stopping caused the abutment pressure influence, coal seam floor rock and the stability of the roadway surrounding rock stress field in equilibrium is broken, which lead to varying degrees of damage to roadways, and often bring about large deformation and difficult to maintain character. In particular, overhead-mining roadway in the impact of repeated mining, the original supporting roadway system would be subjected to serious damage and maintenance difficult. If the treatment method of properly and the roadway repair ineffective, the scope of roadway surrounding rock broken to continue to increase, and supporting more and more difficult, it will seriously affect the normal production of the mine transportation, lead to the coal mine safety in production to bring hidden dangers.In order to effectively control the floor overhead-mining roadway surrounding rock stability, this paper take Xieqiao coal mine in Huainan 13218w working face-610m east 1 B6 floor conveyance roadway engineering practice as background. System to carry out lots of research, such as investigation and analysis a over-heading tunnel with the upper working face about hydro-engineering geological investigation environment, and study of the mining coal seam floor stress distribution and transmission during the mining, the roadway surrounding rock and coal seam bottom rock mechanics numerical simulation and calculation analysis in different overhead-mining program, and on-site working face coal pressure appearance rule about bottom roadway during the mining and cross-rock mining tunnel control technology method.In this paper, accord to the above-mentioned various aspects of the field tests and theoretical research, in generally, which revealed the general law and internal mechanism about the floor seam mining rock stress distribution and cross-moving rock mining roadway damage. This paper given a reasonable and effective control technology program to Solution the influence of overhead-mining roadway surrounding rock which suffer strong or repeated mining, and given an objective evaluation about the cross-mining roadway surrounding rock stability control techniques of the specific conditions. The paper hopes to provide a certain theoretical basis about mine safe and efficient production under the similar conditions.