Identification method and equipment of compressive strength of rock and rotary rock drilling method

A technology of compressive strength and identification equipment, which is applied in the direction of earthwork drilling, drilling equipment, drilling automatic control system, etc., and can solve the problem of being unable to effectively identify the compressive strength of the rock to be broken

Inactive Publication Date: 2019-08-27
ZOOMLION HEAVY IND CO LTD
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for identifying the compressive strength of the rock in order to overcome the problem in the prior art that the ...

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  • Identification method and equipment of compressive strength of rock and rotary rock drilling method

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Embodiment approach

[0042] According to an embodiment of the present invention, the rotary drilling device 100 includes a drill bit with a circular rock fracture surface, where P is the pressure output by the rotary drilling device 100, and M is the output pressure of the rotary drilling device 100. The output torque of 100, h is the depth that the drill bit drills into the rock within the predetermined time t, n is the number of circles that the drill bit rotates within the predetermined time t, μ is the friction coefficient between the drill bit and the rock, A is the cross-sectional area of ​​the drill bit.

[0043] Among them, W=2πM+Ph / n, W1=σ 压 Ah / n, Combined with energy conservation W=W1+W2, the control device 300 can be based on the formula Calculate the compressive strength σ in compression.

[0044] According to another embodiment of the present invention, the rotary drilling device 100 includes a barrel drill, wherein, P is the pressurizing force output by the rotary drilling devic...

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Abstract

The invention relates to the field of rock mining and discloses an identification method and equipment of compressive strength of rock and a rotary rock drilling method. The method comprises the stepsof: S1, drilling the rock using a rotary drilling device (100), and S2, calculating work applied by the rotary drilling device (100) and surface friction energy of the rock through working parametersof the rotary drilling device (100), and obtaining the compressive strength sigma of the rock according to energy conservation of a sum of the work applied by the rotary drilling device (100), rock breaking work and the surface friction energy of the rock, and a relation between the rock breaking work and the compressive strength sigma of the rock. The compressive strength of the rock can be calculated by the working parameters of the rotary drilling device in a rotary excavating process; and further, the problems of drill sticking and the like can be avoided by corresponding parameter adjustment according to the compressive strength.

Description

technical field [0001] The invention relates to the field of rock excavation, in particular to a rock compressive strength identification method, equipment and a method for rotary drilling into rock. Background technique [0002] Because the rock has a relatively high compressive strength, the drilling speed of the rock is much lower than that of the general sand layer, usually below 1m / h. During the process of drilling into rock, it is necessary to provide sufficient torque and pressurized pressure of the oil cylinder through rotary drilling equipment (such as a rotary drilling rig) to carry out rock-breaking drilling. For different rock types, the required cylinder pressure and power head torque output are different. In actual operation, the operator will increase the pressure of the oil cylinder and the torque output of the power head in order to increase the rock breaking capacity. However, this heavy-duty drilling mode increases the wear of the drill bit or barrel dri...

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Application Information

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IPC IPC(8): E21B44/04E21B47/00G06Q50/02
CPCE21B44/04E21B47/00G06Q50/02
Inventor 刘宏亮尹莉刘喻
Owner ZOOMLION HEAVY IND CO LTD
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