rock breaking

The invention relates to a method of measuring a stress wave and to a measuring device and a rock breaking device.

The main factors that influence the efficiency of rock-breaking are the down-hole rock properties and the rock-breaking tools and methods.

The rock breaking mechanism by water jets impact has not been clearly recognized as yet for complicated process of rock damage.

Finally the coal-rock breaking mechanics under the point load press is discussed.

A set of new methods of evaluating rock-breaking effect was developed on the basis of ABAQUS.

Research shows that by testing and analysis: the mechanical properties of the rock directly related rock breaking.

This paper established the model of rock breaking mechanism on disc one cone bit, and developed the simulate software.

On-going water spraying or dust enclosure should be applied during drilling or rock breaking.

Air drilling is a kind of under-balanced drilling technology with air, whose rock breaking form is different from conventional mud drilling.

The rock permeability plays important role in the rock breaking effect of jet.

A full-scale simulation in lab has been carried out for hydraulic auxiliary rock breaking in order to increase drilling speed.

The conventional streamline nozzles in use exist some shortcomings, such as high energy consumption and low rock breaking efficiency.

The pulsed water cannon which is a new and effective hydrodynamic rock-breaking device, will find a wide application.

There is a huge rock breaking through the snows.

The bit needs not only the high rock-breaking capacity but also the strong wear and low resistance during rock-breaking process.

A Study of the Rock Breaking Mechanism during Swirling Water Jet Drilling

Rock Breaking Criteria and Sand Production Prediction of Weakly-Consolidated Heavy-Oil Reservoirs in Shengli Oilfield

Application of Directional Rock Breaking Control Blasting Technology to Projects

Experimental study of rock breaking mechanism of disc one cone bit

Hydraulic system failure diagnosis of the rock breaking platform vehicle

An Experimental Study on Hydraulic Pressure-increasing and High Rock Breaking Efficiency

Numerical Simulation Study on Rock Breaking Mechanism and Process Under High Pressure Water Jet

The principles of fracture initiation and propagation was analyzed according to Fracture Mechanics of Rock and Rock Breaking Mechanics;

Study on The Evolutive Mechanism of Rock Breaking Energy Per Unite Volume under High Pressure Water Jet

Realizing the Ideal Detonation of Explosive and Improving the Rock Breaking Quality

Decision and Application of Rock-breaking Trajectory of Disc Cutter on Spheric Holder

Numerical analysis on rock-breaking mechanism using swirling water jet

Study on Efficiency Rock-breaking Mechanism with Jet-aided Drilling

Numerical Experimental Study on Rock Breaking with Pulse Water Jet

Advance in Study on Theory of Rock Breaking Under Water Jet Impact

Rock-Breaking Test Research on Earthquake Sequence Type

Experimental study on rock breaking with ultra-high pressure jet

FEM Calculation on Rock Breaking Process by High Pressure Jet Impact

Experimental study on rock breaking parameters of dual-jet

Mechanism research on rock-breaking aided by water jetting

Rock breaking mechanism by TBM and modification to pan knife ring

Rock Breaking Effect of Blasting Stress Wave at Moderate or Far Distance

New Progress on Efficient Rock-breaking of Drilling

Analysis on Load Pattern of Rock Breaking of PDC Bit Cutter

The Study on Drilling Method and Rock Breaking Mechanism by High Pressure Water Jet

Rock breaking by water jet