Results 121 to 130 of about 142,974 (226)

Numerical Simulation of Single Tooth Rock Breaking Mechanism Under High Temperature Environment

International Journal of Natural Resources and Environmental Studies
In high-temperature geothermal drilling, due to the high hardness and strong abrasiveness of the formation rock, and the rock drillability is significantly reduced in high-temperature environments, the working efficiency of traditional PDC drill bits decreases, and it is necessary to further explore the rock-breaking mechanism under high-temperature ...
Xian Ye, Qingchun Gao, Xuan Zhang, Shengxu Liu   +3 more
openaire   +1 more source

Experimental study on fractures propagation law and fractures mechanism of gel fracturing

Meitan kexue jishu
Hydraulic fracturing is a widely used physical rock-breaking method to address the challenges in cutting hard rocks. However, conventional water-based fracturing typically generates fractures propagating perpendicular to the minimum principal stress ...
Yukun LIN, Jiangwei LIU, Shaojie CHEN, Nan LI, Xiaofei WANG, Yaoyou LIU, Zhiyuan LU   +6 more
doaj   +1 more source

Calculation of periodic roof weighting interval in longwall mining using finite element method [PDF]

, 2013
B Singh, Behdeen Oraee-Mirzamani, BHG Brady, E Hoek, E Hoek, GSP Singh, Kamran Goshtasbi, M Monjezi, Mehran Gholinejad, ML Jeremic, Navid Hosseini, PR Sheorey, R Trueman   +12 more
core   +1 more source

Mechanical properties and rock-breaking effects of ridge-shaped PDC teeth

Jin'gangshi yu moliao moju gongcheng
Objectives: With the depletion of easily recoverable oil reservoirs, the focus of oil and gas exploration and development in China has shifted to "two deeps and non-conventional" oil and gas fields. This transformation is not only accompanied by a significant increase in well depth and more complex formation challenges but also presents more stringent ...
Zhitao XIE, Yuxuan ZHAO, Yong GUO, Desheng WU, Yadong LI   +4 more
openaire   +1 more source

Rotary cutting test on rock-breaking mechanism and efficiency of milled-tooth rolling cutters for shaft sinking by drilling methods. [PDF]

Sci Rep
Wang X, Cheng H, Lin J, Yao Z, Guo L, Zhang L.   +5 more
europepmc   +1 more source

Rake angle optimization for balanced efficiency and durability in PDC cutter cutting granite interaction via infrared thermal dynamics and fragmentation mechanism. [PDF]

Sci Rep
He X, Zheng B, Luo Z, Hu P, Yang Y, Yin G.   +5 more
europepmc   +1 more source

Study on vibration characteristics of roadheader cutting pre-cracked hard rock. [PDF]

Sci Rep
Liu H, Li F, He J, Wang W, Zhang H.
europepmc   +1 more source

Study on rock fragmentation and vibration response characteristics in hard rock formations using high-pressure gas expansion method. [PDF]

Sci Rep
Liu D, Jin Y, Cao K, Tang Y, Wang C.
europepmc   +1 more source

Mechanical properties of rock cutting by disc cutters and feasibility analysis of mechanical mining in Jinchuan No. 3 Mine with hard rock. [PDF]

Sci Rep
Zhao J, Huang D, Zhu D.
europepmc   +1 more source

Study on fault vibration characteristics of shield cutters based on FEM-MBD. [PDF]

Sci Rep
Chen J, Zhang P, Li S, Qiu S, Zhang T.
europepmc   +1 more source