The issues of estimation of danger of collapse of collapsing rocks at joint horizontally underground and open-pit development of apatite deposits sites are considered. It is shown, that at known parameters of self-collapse of covering rocks and borders of their collapse there are organizational and technological possibilities of prevention of danger of ejection of rocks in a quarry by a choice of an appropriate order and parameters of development of clearing works in underground conditions, and also a place and time of performance of protective measures.
Излагаются методика и результаты лабораторных исследований процесса обрушения налегающих пород. Исследования выполнены в Ленинградском горном институте для условий разработки апатитовых месторождений Хибин, висячий бок которых представлен крепкими трещиноватыми по родами ...
