Search
Search Results
-
Determination and Engineering Practice of Unsupported Roof Distance for Rapid Excavation of Roadway with Thick and Hard Basic Roof
In order to determine the reasonable empty roof distance during roadway excavation, a mechanical model of the direct roof rock beam was established,...
-
Roof Stability Mechanism and Support Technology Optimization of Tunneling Roadway
To study the stability of roof areas in the process of rapid driving in coal roadways, the deformation law of roof areas under the interaction of...
-
Characteristics and control technology of face-end roof leaks subjected to repeated mining in close-distance coal seams
The roof usually collapses when exposed to the repeated underground mining; this will potentially lead to the instability of coal wall and even cause...
-
Spatial Distribution of Rock Disturbance in Assessment of Roof Stability in Flat-Ceiling Cavities
A common misuse of the disturbance factor in the Hoek–Brown failure criterion is in assigning one value of it to the entire rock mass involved in...
-
Prediction of the longitudinal ground pressure-acting roof of the shield during single-shield TBM excavation in weak rock masses
The single-shield TBM is generally used for excavations in weak rock masses to prevent excessive deformations and falls of the ground. During the...
-
Numerical Study of the Roof Fall and Out of Seam Dilution and Their Event Risk in a Mechanized Longwall Panel
Longwall mining operation is mainly accompanied by the roof fall phenomenon and out of seam dilution (OSD). These occurrences are strongly dependent...
-
Physical modeling investigation on deformation characteristic and roof instability mechanism of deep rectangular roadway in layered rock mass
Layered rock mass is a type of surrounding rock often encountered in underground engineering. Due to the existence of bedding structural surface,...
-
Numerical Modeling of Stand-Up Time of Tunnels Considering Time-Dependent Deformation of Jointed Rock Masses
The mechanical responses of tunnels are time-dependent due to creep deformation of rock masses, which can result in large deformations on tunnel...
-
Analysis of Behaviour of Caverns with Varying Pillar Widths Between the Caverns
In this study, two caverns viz. Powerhouse Cavern (PHC) and Transformer Cavern (TC) forming major part of hydro-electric project in eastern Himalayas...
-
Stress State of Support System in Temporary Roadway in Unstable Rock Mass
AbstractThe authors estimate stress state in the support system and in rocks nearby a roadway driven in unstable rock mass and when the voids and...
-
Analytical Estimation of Strain Energy Accumulation in Retreating Longwall Mining and Sensitivity Analysis Using the Orthogonal Testing Method
Excessive strain energy accumulation in the coal seam is one of the essential conditions for rockbursts to occur. It is imperative to understand the...
-
In Situ Tests Comparing the Support Effects of Thin Spray-on Liner and Shotcrete on a Roadway Subjected to Blasting
Shotcrete has been widely used in the support of tunnels and mine roadways, but frequent blasting disturbances can easily cause it to spall from rock...
-
Study on rib spalling control of shortwall drilling mining technology with a large mining height
The drilling shearer and drilling mining technology has been developed in order to effectively control the rib spalling of a shortwall with a large...
-
Asymmetric Deformation Mechanism of Roadway with Continuous Mining and Continuous Backfilling
Continuous mining and continuous backfilling (CMCB) is an effective method to control surface subsidence and implement resource utilization of solid...
-
Geomechanics model test and numerical simulation of 2G-NPR bolt support effect in an active fault tunnel
Active faults are a common adverse geological phenomenon that can occur during tunnel excavation and has a very negative impact on the construction...
-
Stability Analysis and Deformation Control of Tunnel with Extremely Weak Surrounding Rocks Caused by Strike-Slip Fault Activity
With the rapid rise of infrastructure construction in southwestern mountainous areas of China, tunnel engineering has become increasingly frequent in...
-
Research on Coal Pillar Width and Support Design of Gob-Side Entry
Coal pillar is a problem that cannot be ignored in coal mining, and reasonable width of coal pillar and support parameters can not only ensure the...
-
Loss displacement estimation of Azad pumped storage powerhouse cavern using combination of numerical modeling and instrumentation results
Instrumentation and monitoring are common methods to control the stability of large underground spaces. During monitoring underground excavations, it...
-
Stability of subsea circular tunnels using finite element limit analysis and adaptive neuro-fuzzy inference system
Construction of subsea tunnels has grown significantly in recent decades around the world. Hence, ensuring the stability of these tunnels is very...
-
Comprehensive analysis control effect of faults on the height of fractured water-conducting zone in longwall mining
In order to examine the height of a fractured water-conducting zone due to the presence of a fault, a typical working face in the Baodian Coal Mine...
