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A case study of drilling process monitoring for geomaterial strength assessment along hydraulic rotary drillhole
It is challenging yet essential to identify the different processes and operations for the wide utilization of factual data during the current normal...
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Modeling Percussion and Rotary Percussion Drilling in Strong Rocks
AbstractThe article describes two single-mass models of a drill string and different methods of bottom-hole treatment: percussion and rotary...
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Development and application of an aeromagnetic survey system for a large load rotary-wing UAV
UAV geophysical surveys can adapt to complex ground exploration environments and greatly reduce the safety risk of operators, which may be applied in...
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Principles of Rotary Drilling in Frozen Soils
The concept of conventional rotary drilling with pipe strings is used frequently in mineral exploration and geotechnical projects where boreholes may...
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Research on Spatial Kinematics and Cutting Load Characteristics of TBM Disc Cutters
Rock cutting by tunnel boring machine (TBM) disc cutters is usually simplified as an indentation-type or linear-cutting process. It is inconsistent...
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Cutting efficiency of extremely hard granite by high-pressure water jet and prediction model of cutting depth based on energy method
Traditional mechanical rock breaking has problems such as low rock breaking efficiency and severe tool wear when encountering extremely hard granite....
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A Test System for Microwave-Assisted Dual-Mode Mechanical Cutting of Hard Rock Under True Triaxial Compression
This paper introduces a test system for microwave-assisted dual-mode mechanical cutting of hard rock under true triaxial compression. The test system...
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The Rock-Breaking Mechanism of Thermal Spalling-Assisted Rock Cutting by PDC Cutter
The challenges pertaining to low rock-breaking efficiency and high drilling cost in deep hard formation and hot dry rock (HDR) are highly pronounced....
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Study of the cutter-rock interaction mechanism during TBM tunnelling in mudstone: insight from DEM simulations of rotatory cutting tests
The rock breaking mechanism plays a significant role in TBM (tunnel boring machine) performance prediction, which has not yet been understood...
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The Rock Fragmentation Mechanism in Rock Cutting with PDC Cutter Under Hydrostatic Pressures
Drilling into deep formation characterized by high formation and hydrostatic pressures often brings great challenges to oil and gas industry and the...
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Determination of cutting force and failure surface using a blunt cutter under confining condition: analytical modelling
Digital drilling is a common method for detecting the deep rock mass information, but the cutter wear leads to an irregular shape of the rock chip...
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The Influence of the Rotary Speed of a Microwave Applicator on Hard-Rock Fracturing Effect
Microwave-induced hard rock fracturing technology has potential application prospects in tunnel boring machine (TBM) hard tunnel excavation. It is of...
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A New Prediction Model for Cutting Depth of Hard Rock Using High-Pressure Water Jets
High-pressure pure water jet has been widely used in breaking soft rocks and medium–hard rocks, but its research on cutting hard rocks is very...
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Rotary Drilling with Fluid Circulation in Frozen Soils
Rotary drilling with drilling fluid circulation is the most common method of geological exploration. The main concerns of rotary drilling in frozen...
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Dynamic Cutting Force Model and Vibration Analysis of the Cutterhead in TBM
Dynamic information about the cutting force of each cutter, such as peak and frequency of normal force, is essential to address the deformation and...
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Investigation of the rock drilling performance of rotary core drilling
The specific drilling energy and penetration rate are very important performance parameters for drilling. The main objective of this study was to...
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Specific Features of Soil-Vegetation Cover of Revegetated Oil-Polluted Oligotrophic Bogs Reclaimed by the Cutting Method in the Middle Ob Region
AbstractThe article provides data from a comparative analysis of vegetation restoration in areas of oligotrophic bogs with strong oil product...
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Experimental and Numerical Investigations on Rock Breaking of TBM Disc Cutter Based on a Novel Platform with Rotational Cutting
Understanding the force state of disc cutters in advance is of great practical significance to predict the dynamic response during mechanical...
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Strong strata behavior mechanism and roof cutting control of small pillar gob-side roadway in extra-thick coal seam
In Datong mine, the extraction of coal resources faces challenges due to strong strata behavior and significant deformation of gob-side roadways...
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Model test research and application on control method of cooperative pressure relief by directional roof cutting for roadways with strong dynamic pressure
To solve control problem of roadways with huge thick roof under the environment of strong dynamic pressure in coal mines, the causes of strong mine...
