To study the shear failure modes of rock fractures with different morphologies. rock types and test conditions. direct shear tests were conducted with the aid of an acoustic emission test system to obtain the characteristics of acoustic emissions in the shear process. The test results indicated that sandstone fractures experienced brittle shear failure under higher constant normal loa... https://www.jmannino.com/best-price-Charge-Disposable-5000-Puffs-12mL-hot-choice/