Anchor bolt drilling device for roadway floor in underground coal mine

Abstract

The invention discloses an anchor bolt drilling device for the roadway floor in an underground coal mine. The device comprises an underframe (1), work components (2), an upper frame (3) and device positioning components (4), wherein the upper frame is fixedly mounted on the underframe; the work components are mounted on the underframe and comprise a body (21), front and rear guiding through slots (22), front and rear positioning and locking nuts (23), left and right guiding through slots (24), left and right positioning and locking nuts (25), a drilling machine mounting rack (26) and a drilling machine (27); the device positioning components comprise top positioning and supporting hydraulic cylinders (41), bottom positioning and supporting hydraulic cylinders (42) and a control valve unit (43), and the control valve unit is connected with the top positioning and supporting hydraulic cylinders and the bottom positioning and supporting hydraulic cylinders. The anchor bolt drilling device for the roadway floor in the underground coal mine is simple in structure and can rapidly drill the roadway floor on the premise that reverse support force is provided in the drilling process, the overall anchor bolt mounting speed is increased, and the device meets the requirement for rapid roadway forming.

Description

technical field [0001] The invention relates to a drilling device, in particular to a coal mine underground roadway floor bolt drilling device suitable for drilling and bolting the bottom plate of the roadway 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 stru...

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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