Filimonov P. Substantiation of extension and rational modes of longwall end sites timbering.

It is established, that at performance of processes of coal mining acceleration of bearing strata convergence variablepolarity during the moment of support travel, and its absolute values in an average part and on end sites of longwall are various. Dependences of bearing strata convergence acceleration on mining coal and fas-tening along longwall with high speed face travel are established. The quantitative criterion of high-efficiency longwalls end sites extent is proved. With the help of this criterion extent of unsatisfactory interaction mechanized supports with a roof on end sites zones of longwalls is determined for accommodation in these zones of fastening special means. Rational values of specific resistance support for preservation of roof breeds continuousness on end sites of longwall with high speed face shift are established.Technical requirements to mechanized supports for the end sites of high-efficiency longwalls are developed.