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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The factor that affect the well lane stability has primarily: Round the rock kind, well lane position, tunnel stalk line direction, cross section size, break rock method etc.

影响井巷稳定性的因素主要有：围岩性质、井巷位置、巷道轴线方向，断面尺寸，破岩方法等。

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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