As a special hydrogeological condition of Guotuen Coal Mine,directly clearing away scattered coal chamber of main shaft might happen water burst accident.

Taking the coal bunker chamber of Tuzhu Mine as a case,the stability coefficient was calculated that of the surrounding rock with theory of loose ring and combined arch theory,the both results of calculations were higher than 1.

In this article, the writers explain the constructing technology of unloading gallery, coalbunker and loading gallery that make up a transfer building In The Eighth Coal District of Qianying Coal Mine of Kailuan Group Company.

This paper introduces the supporting technique of high-speed load-bearing pre- stressed cable anchor used to extra large coal-rock chamber,describes the selection of support pattern,support parameters and construction method based on the prac- tical conditions;and also makes a thorough study on the results of strata control ob- servations.

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.