Construction of underground chamber with waterproof gate in Jinshandian iron mine;

This paper briefly expounds the construction,injection water testing-pressure and zone project optimization of waterproof lock room under exceedingly complicated geological conditions,and introduces the experience of lock room construction and technique information acquired from testing-pressure and project optimization.

This paper puts forward the reasonable optional method of timbering parameter for big section room construction,as well as the items should be noticed and the problems should be solved first in construction course.

Through analysis to weak coalbed and harmfulness to roadway,main haulage roadway and room supporting design and adaptability condition are discussed in weak coalbed.

According to service rife of room and feature of surrounding rock,pressure situation of room was analyzed,supporting parameter was counted on the basis of combined arch theroy.

Back-analysis of mechanics parameters of surrounding rock of cave;

Unified solution of elastic-plastic analysis for surrounding rock mass stress under cave deformation;