Several remedial measures that will stabilize the structure include building artificial arch face short joints around the upstream perimeter to reduce the tensile stress concentration in the rock with the stability of the edges secured by the steel rods.

Using the data of Tahe fractured reservoir, the effects of natural fracture, artificial fracture and macro-fracture on post-frac productivity show that the permeability of the natural fracture is one important factor affecting post-frac productivity.

Natural fracture and artificial fracture are all controlled by stress field.

Model of artificial fracture induced stress was built based on the damage theory.

In present, it is not thorough to study the complex hydraulic fracture productionperformance and influence of correlation parameter.

According to known parameters, such as the reservoir permeability, fluid viscosity, well pattern, well spacing, hydraulic fracture length and so on, the use coefficient of the reservoir can be obtained quickly.

The article introduces the supernormal fracturing technology used for increasing fracture width from three aspects which are the affecting factors of created fracture conductivity,the theory of increasing propped fracture width and the fi.

Effect of artificial short joints on stress relaxation and cracking control in RCC arch dam;

The artificial short joints in the dam bod.

A structural improvement, integrated structure with artificial short joints to make a plan arch in the lower part of dam and decreased height of upper cantilever with inclined toward up stream bottom,was suggested.