Coal mine roadway floor anchor rod drilling device

Abstract

The invention discloses a coal mine roadway floor anchor rod drilling device. The coal mine roadway floor anchor rod drilling device comprises an underframe (1), a working component (2), an upper frame (3) and a device positioning component (4), wherein the upper frame (3) is fixedly installed on the underframe; the working component is installed on the underframe and comprises a body (21), a front-back guide groove (22), a front-back positioning clamping flange (23), a left-right guide groove (24), a left-right positioning clamping flange (25), a drilling machine installation frame (26) and a drilling machine (27); the device positioning component comprises top positioning supporting hydraulic cylinders (41), bottom positioning supporting hydraulic cylinders (42) and a control valve group (43); and the control valve group is connected with the top positioning supporting hydraulic cylinders and the bottom positioning supporting hydraulic cylinders. The coal mine roadway floor anchor rod drilling device is simple in structure, and can achieve rapid drilling of a roadway floor on the premise of providing reverse supporting force in the drilling process, thereby wholly improving the anchor rod installation speed and meeting the requirement of rapid roadway forming.

Description

technical field [0001] The invention relates to a drilling device, in particular to a coal mine roadway bottom plate bolt drilling device suitable for drilling and bolt support for the roadway bottom plate in a coal mine, and belongs to the technical field of underground support equipment. Background technique [0002] Due to the different characteristics of the rock mass at different depths around the roadway and the different stress environments, the surrounding rock is prone to uncoordinated deformation due to factors such as geological periodic movement and groundwater pressure, especially for underground mining in coal mines. The surrounding rock will deform and move into the roadway. The phenomenon that the floor of the roadway or the gob floor rises upwards is called the floor heave. The floor heave is a dynamic phenomenon that often occurs in the mine roadway. It is related to the nature of the surrounding rock. , impact of mining, mining depth and geological structu...

AI Technical Summary

Problems solved by technology

[0004] Improve the strength of the surrounding rock of the floor, mainly including floor grouting, floor bolt support, etc. When using bolt support for the floor, it is necessary to drill the floor first. The traditional method needs to be above the drill pipe during the drilling process. Wooden columns or reverse air legs are used to support the roof of the roadway to provide reverse support. However, in order to ensure that the bottom plate of the roadway will not be damaged before the anchor is installed, the anchor must be installed within a certain distance from the excavation face. The size of this distance is related to the nature of the floor rock, and generally should not be greater than 10 meters. At the same time, in order to ensure that the roadway excavation speed is not affected, the bolt installation speed is usually fast, and this traditional drilling method is not only complicated and labor-intensive. The consumption of material resources is large, and the speed of drilling and installing bolts is slow and the efficiency is low, which is not suitable for the requirements of rapid roadway formation

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