The rock crushing work ratio denotes the work used to break rock of per volume in drilling.

岩石破碎比功表征钻井中破碎单位体积岩石的功耗量。

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Static fracture agent, after all, is one way to break rock and concrete in complicated surroundings and unable blasting condition.

在环境复杂且不能施爆的情况下，用静态破裂剂破裂岩石或混凝土不失为一条捷径。

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Through the theoretical and experimental study on rock breaking by submerged water jetting, taking rock breaking efficiency as goal function, the optimum jetting pressure was acquired to break rock.

本文通过对淹没射流破碎岩石的理论及实验研究，以破岩效率作为目标函数，得到射流破岩的最优压力条件。

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They were suspended from ropes as they used heavy air-powered hammers to break any loose rock away from the face of the canyon walls.

VOA: special.2009.08.12

This causes the rock to break, or fracture,releasing the gas.

VOA: special.2009.10.23

During fracking, large volumes of water, along with sand and hazardous chemicals, are injected into the ground to break rock apart and free the oil and gas.

WSJ: Fracking coalition upsets both greens and drillers

This year he completed what is believed to be the first ever fracture stimulation procedure in Turkey: injecting a mixture of water and sand at high pressure down the wells to break up rock and release gas.

FORBES: Magazine Article

The industry has boomed in recent years, thanks to a stunning expansion of drilling in previously untapped areas because of the use of hydraulic fracturing, or fracking, which injects sand, water and chemicals to break apart rock and free the gas inside.

NPR: EPA Methane Report Further Divides Fracking Camps