Novel method for mechanical rock breaking based on tensile shear stress

Abstract

The invention discloses a novel method for mechanical rock breaking based on tensile shear stress. A hydraulic power mechanism comprises a movable power vehicle (9) and a hydraulic oil tank (11), wherein the hydraulic oil tank (11) is assembled on the power vehicle (9), and a driving motor (10), a pressure gauge (12) and a controller (13) for controlling the hydraulic oil tank (11) to supply oil are arranged on the hydraulic oil tank (11); a drawing rock breaking mechanism comprises a hydraulic jack (1), a jacking vertical rod (2), a base plate (4), a cross beam (5), a drawing rod (6) and an anchoring rod (8); and one end of an oil feeding pipeline (14) and one end of an oil return pipeline (15) are respectively connected with an oil inlet and an oil return opening of the hydraulic jack (1), and the other end of the oil feeding pipeline (14) and the other end of the oil return pipeline (15) are respectively connected with an oil outlet valve and an oil return valve of the hydraulic oil tank (11). According to the novel method, the characteristics that rock masses are resistant to pressure and are not resistant to tensile shear are fully utilized, static environment-friendly mechanical rock breaking with only drilling but not blasting is realized, the rock masses are prevented from being excessively smashed, the high boulder rate is avoided, the requirement for rock lumpiness of an engineering project is met, the mechanical shoveling and transporting efficiency is improved, the shoveling operation cost is reduced, and the method can be widely applied to the fields of mines, tunnels, traffic roads, side slopes, foundation pit excavation and the like.

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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