Results 131 to 140 of about 142,974 (226)

Evolution mechanisms of mining-induced overlying strata structures: a case study in the Qinshui coalfield. [PDF]

Sci Rep
Zou Y, Wang Z, Song M, Chai H, Wang H, Chen F.   +5 more
europepmc   +1 more source

Study on the Variation Characteristics and Laws of Hole Formation in Coal-Rock Masses under HPWJ Impact Fracturing. [PDF]

ACS Omega
Xu S, Zhu Y, Liu S, Guo L, Zhang J, Xin Y, Zhang X.   +6 more
europepmc   +1 more source

Disaster-causing mechanism and control technology of interlayer rock breakage in gently inclined close distance coal seams mining. [PDF]

Sci Rep
Yuchi X, Du X, Shu P, Yu L, Lei W, Yang W, Zhang Z.   +6 more
europepmc   +1 more source

Numerical investigation on the tunneling efficiency of TBM considering the argillization effect based on the energy evolution. [PDF]

Sci Rep
Lu M, Ruan H, Liu B, Gao H, Chen H, Zeng Y, Bao S, Chen X, Wan X, Tong B, Li B.   +10 more
europepmc   +1 more source

Comparative study on the cutting performance of super-large diameter atmospheric cutterhead and pressurized cutterhead under the same stratum. [PDF]

Sci Prog
Chen P, Huang S, Shu J, Liu J, Sheng J, Lin L, Yang M.   +6 more
europepmc   +1 more source

Numerical Simulation on Impact Crushing of Hard Rock by PDC Bit Based on Cohesive Element

Shiyou jixie
The rock of deep oil and gas reservoir has high hardness， and the drilling efficiency of PDC bit is low under conventional drilling mode. Impact drilling performs well in crushing hard rock， but the damage mechanism of PDC bit crushing hard rock under ...
Gao Feng, Shi Huaizhong, Huang Zhongwei, He Wenhao, Xiong Chao, Fu Xinkang   +5 more
doaj  

Study on roof partition fracture based on dominant primary fracture. [PDF]

Sci Rep
Xia W, Qiang L, Yongkai Z, Yuqi R, Hao Y, Weijie W, Yuesong T.   +6 more
europepmc   +1 more source

Simulation study of rock-breaking performance of TBM cone-shape cutterhead under different tunneling parameters in spiral tunnel. [PDF]

Sci Prog
Lin L, Liu K, Ji Z, Qi M, Wang J, Xiao J, Xia Y, Yang M.   +7 more
europepmc   +1 more source

Application of CO₂ fracturing blasting in mountain tunnel construction adjacent to existing structures. [PDF]

Sci Rep
Li Z, Yuan J, Xie W, Wu H, Xiao J, Wu Y, Pan C.   +6 more
europepmc   +1 more source

Vibration behavior analysis of reamers based on drill string dynamics. [PDF]

Sci Rep
Fusheng Y, Yuchun K, Bin L, Qianwen C, Ming S.   +4 more
europepmc   +1 more source