Comprehensive supporting practice of fracture water-weakened roadway in softrock mass;

The fractures distribution and fracture rock mass permeation research is the premise condition that to study groundwater movement and pollutant migration in fracture rock mass in bed rock area, which includes the dominance orientation of fracture that groundwater fluxes in it, the brisk zone distribution of fracture water and the permeability calculation of rock mass.

According to the natural geographic and geological structure of Xiya o watershed, this paper analyzes and demonstrates the causes of the Trias Liujia gou Group s fracture water in Yuci Xiyao watershed, and makes forecast of the st orage capacity of Liujiagou Group s fracture water.

This paper mainly describes the base principle of application the 218 P 0 method to seek crevice water of rock stratum, illustrates the base law of the transformation, concentration, storage, abundant radon and abundant water, poorly radon and poorly water, synchronous corresponding, and consitent position of water and radon under the fault zone condition, etc.

The age of crevice water is very different, varying from less than 4 years old to about 40 years old.

The bore water and crack water were respectively researched because they had different hydrochemical characters and hydrogeologic conditions.

The height of water flowing fractured zone is 55 m by traditional esti- mation method,so that the water can not reach sand-gravel water-bearing bed.

Comprehensive administration for shaft crevice water in Liujia Coal Mine;