Схемы бурения газодренажных скважин в выявленные зоны нарушения сплошности горного массива

Abstract

. In order to find out the nature of the distribution of the stress state in the bottom-hole part of the massif and its effect on the development of cracks ahead of the face, the volume-stress state ahead of the faces of the preparatory workings was determined, and the nature of the zones of crack development (destruction) ahead of the face of the preparatory workings was determined, taking into account the cleavage of cracks in the array. As a result of the analysis of the zones of explosive destruction in the bottom-hole zone of the mine, it was revealed that the zones of crack development (destruction) in front of the mine face have an ambiguous character both in the height of the face and along each of the layers. This should be taken into account both when laying gas drainage wells and when drilling them. The development was carried out by the GPC tunneling combine from top to bottom. According to the regulatory documents, when carrying out the conveyor bremsberg, the current forecast of the emission hazard for the initial gas release rate and the output of the drill pin, as well as the forecast for the amplitude-frequency characteristics of the acoustic signal, is applied. To compare the effectiveness of methods for reducing the natural gas content of the D6 formation, comparisons were made of the results of the operation of reservoir degassing wells. The conducted studies allow us to identify a number of advantages of intensive degassing of the coal massif, directed along the course of production, in comparison with degassing by wells with drilling of the contour of future production.