Method for determining geological state of rock mass in real time by monitoring drilling process of pneumatic bolt drilling machine

Abstract

The invention discloses a method for determining the geological state of a rock mass in real time by monitoring the drilling process of a pneumatic bolt drilling machine. The method comprises: a pressure gauge and a flow meter are connected in series to a motor intake pipeline of a drilling machine, a hall rotation speed sensor is installed a drilling rod of the drilling machine vertically, operation parameters, including an intake pressure P and a gas consumption value Q of a motor as well as a rotation speed rate omega and a drilling rate v of the drilling rod, during the drilling process ofthe drilling machine are obtained during the installation process of a bolt and an anchor rope; according to a relationship between an output torque M, the gas consumption value Q, and the rotation speed rate omega of the drilling machine under a certain intake pressure P, an output torque M of the drilling machine is calculated; and on the basis of the output torque M and the drilling rate v ofthe drilling machine, a rock mass integrity coefficient Kv is determined by using a neural network. According to the method disclosed by the invention, the relationship between the operation parameters of the pneumatic bolt drilling machine and the geological state of the rock mass is determined by field testing; and on the basis of the relationship, the geological state of the rock mass is evaluated in real time by using the operation parameters of the pneumatic bolt drilling machine.

Description

technical field [0001] The invention relates to a method for determining the geological state of surrounding rock mass in real time in the fields of coal mine roadway excavation, working face mining and the like. Background technique [0002] Coal mines in my country are mainly mined underground, and a large number of roadways need to be dug underground. Keeping the stability of the roadway surrounding rock is of great significance to mine construction and safe production, and it is also a common technical problem faced by coal mines. The core problem facing the design of coal mine roadway support is that the underground geological conditions of coal mines are changeable, which limits the applicability of the widely used engineering analogy method. However, there is currently a lack of quick and convenient methods for evaluating the geological state of rock mass underground in coal mines, and breakthroughs in related technologies and methods are urgently needed to promote th...

AI Technical Summary

Problems solved by technology

[0008] Purpose of the invention: Aiming at the above-mentioned prior art, a method for determining the geological state of the rock mass in real time based on the drilling parameters of the pneumatic rock bolter is proposed, and the geological state of the rock mass is evaluated in real time by monitoring the drilling process of the pneumatic rock bolter, so as to solve the existing method Existing time-consuming and labor-intensive problems with limited application range

Images