Pneumatic percussion unit;
hole;
soil;
main removal line;
exhaust line;
exhaust back pressure;
D O I:
10.1134/S1062739149030131
中图分类号:
TD [矿业工程];
学科分类号:
0819 ;
摘要:
The authors study work process of pneumatic percussion units with valveless air distribution under exhaust back pressure in drilled solid removal line in long horizontal hole drilling machines. It is shown that range of efficient values of the machine performance equal to maximum percussion force does not change under increase in the exhaust back pressure.