As a subtopic of stress and seepage coupling research of fractured rock mass

the hydraulic fracturing research was still in its infancy. The theory study was not being perfect. Nowadays

More and more rock engineering were expanded to underground. The underground structures were usually bearing on high hydro-pressure. The requirement of engineering construction was an impulse to drive the theory and technique research of hydraulic fracturing in rock mass. Hydraulic fracturing

as a technique

was used in petroleum industry to increase output of oil wells initially. In the sequel

it was introduced to stress measurement. Along with the construction of hydro-electricity projects

underground nuclear waste deposited

ground thermal energy exploitation

underground mining and so on

underground structures was faced on wicked hydro-geological conditions

such as high water pressure and deep burying. The effect of hydraulic fracture was being paid more and more intention by engineering rock stability researchers in recent years. A detailed review about rock hydraulic fracture research was done in this paper. Some theories

methods

results and hot points of recent studying were reviewed and being commanded briefly. Finally

some key problems were pointed out which need to be studied emphatically.