A New Method of Mechanical Rock Breaking Based on Tensile-Shear Stress

Abstract

The invention discloses a new method for mechanical rock breaking based on tension-shear stress. The hydraulic power mechanism includes a movable power car (9), a hydraulic oil tank (11) assembled on the power car (9), a hydraulic oil tank (11 ) is provided with a drive motor (10), a pressure gauge (12), a controller (13) for controlling oil delivery from a hydraulic oil tank (11); , backing plate (4), beam (5), pull rod (6), anchor rod (8); one end of the oil delivery pipeline (14) and the oil return pipeline (15) respectively connects with the oil inlet of the hydraulic jack (1) port and the oil return port, and the other end is connected with the oil outlet valve and the oil return valve of the hydraulic oil tank (11) respectively. The invention makes full use of the characteristics of the rock mass in terms of compression resistance but not tensile shear resistance, and realizes the static environmental protection mechanical rock breaking of "only drilling without blasting", avoids excessive crushing of rock blocks and a high large block rate, and meets the rock block size of engineering projects It can improve the efficiency of mechanized shoveling and transportation, reduce the cost of shoveling operations, and can be widely used in mines, tunnels, traffic roads, slopes, foundation pit excavation and other fields.

Description

technical field [0001] The invention belongs to the technical field of mechanical rock breaking, and in particular relates to a new method for mechanical rock breaking based on tension-shear stress, which can be widely used in fields such as mines, tunnels, traffic roads, slopes, and foundation pit excavation. Background technique [0002] At present, explosive blasting is still the most important rock mass crushing method. However, the rock mass in the crushing area is too broken under the blasting rock crushing method, and large pieces are easy to be produced in the crack area, resulting in a low energy utilization rate of explosives, which is generally about 20%; and a large number of After the explosion energy is released, secondary disasters such as severe blasting vibration and noise are caused, and a large amount of blasting dust and CO, NO, NO 2 , NH 3 , SO 2 Blasting toxic and harmful gases, polluting the production environment and the atmospheric environment, ser...

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Problems solved by technology

[0006] In order to overcome the many disadvantages of rock breaking by explosive blasting, reduce the energy consumption of rock breaking by blasting, improve the utilization rate of rock breaking energy, create an excellent production and operating environment, and completely solve the blasting vibration, blasting dust and toxic and harmful gases induced by blasting rock breaking Hazard problem, the present invention proposes a new method of mechanically breaking rock based on tension-shear stress. When the tensile strength and shear strength are high, the rock mass can be broken into certain pieces, and the smaller tensile and shear stress can be used to achieve the purpose of breaking the rock mass, forming a new method of static environmental protection mechanical rock breaking

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