【摘 要】
：
In order to obtain the perforation depth, the three zones with different permeability because of plastic deformation and fluid invasion were studied based on related theories. The study shows that the calculation of perforation depth should take account o
【机 构】
：
Research and Development Center, Guangdong Handar Blasting Engineering Co., Ltd., Guangzhou 510055,
论文部分内容阅读
In order to obtain the perforation depth, the three zones with different permeability because of plastic deformation and fluid invasion were studied based on related theories. The study shows that the calculation of perforation depth should take account of not only damaged zone, but also plastic zone, because the plastic zone has much lower permeability. The required minimum perforation depth was obtained by making the solution of elastic/plastic equations, and the factors affecting perforation depth were analyzed accordingly.
其他文献
Under the environment of seepage field, stress field and temperature field interaction and influence, the three fields will not only produce coupling effect, but also have deformation with time due to the rheological behavior of rock mass. In the paper, b
In order to optimize monitoring points and monitoring factor, the relationship between pollutants and soil sample were established by correspondence analysis. The study results show that the reflecting monitoring points and monitoring factors in the graph
Field spectrum pretreatment experiments were carried out, and denoising nu-merical experiment via lifting wavelet transform (LWT) was designed, and several famous test signals including blocks, bumps, heavy sine and doppler were processed via LWT in these
The main factors that affect infrared surveying in roadway include that property of rock, electromechanical equipments running, environmental temperature, hydrogeology and support material etc. This paper sums up the expression features of these disturbin
The composition of coal-derived light oil (IBP-220 ℃) was separated into 5 fractions by atmospheric distillation and analyzed by gas chromatography/mass spec-trometry (GC/MS). The light oil was made at 0.1 t/d coal direct liquefaction bench scale unit (BS
The constitutive equation was deduced.The results were obtained from the elastic and elastoplastical analysis of the cylinder sample applied with different ratios of load on both the inner and outer sides and different moduli ratio.The factors affecting t
By employing numerical modeling, similar material simulation and comprehensive field observation, investigations were made and patterns were obtained governing surrounding-rock stress distribution and strata behaviors. It shows that patterns governing dis
The effect of reinforcing roof, sides and floor corners to control floor heave of extraction opening was analyzed, It was proved by engineering practice and numerical simulation that reinforcing any part of surrounding rock have certainly control effect f
Analyzed the support instable mode of sliding, tripping, and so on, and believedthe key point of the support stability control of fully mechanized coal caving face with steepcoal seams was to maintain that the seam true angle was less than the hydraulic s
A nonlinear creep-damage model for soft rock under uniaxial compression was presented, which takes into account both nonlinear creep and damage growth with time.The model is based on the hardening theory. The model is validated through comparison with exp