Design on water pipeline of a kilometre shaft;

But,in the second auxiliary shaft constructing process of Wangfenggang coalmine,they had carried on technological innovation actively and a far transporting concretes system was established based on adopting mechanized production line in kilometer deep shaft.

Under conditions of large section,deep level and high ground pressure of second auxiliary shaft in Wangfenggang coalmine,in order to achieve rapid construction of the kilometer deep shaft,mechanized support operation line is carried on and a set of scientific and feasible plan is made for constructing shaft.

Geochemical characters of the giant gas accumulations with over one hundred billion cubic meters reserves in China;