Stable drilling device of coal mine self-movement floor anchor rod

Abstract

The invention discloses a stable drilling device of a coal mine self-movement floor anchor rod. The stable drilling device comprises a bottom frame (1), a working part (2), an upper frame (3) and a device positioning part (4), wherein the upper frame is fixedly mounted on the bottom frame; the working part is mounted on the bottom frame 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 mounting frame (26) and a drilling machine (27); the device positioning part comprises positioning and supporting bidirectional retractable hydraulic cylinders (41) and a control valve set and pump station (42); and cylinder bodies of the two positioning and supporting bidirectional retractable hydraulic cylinders are bilaterally symmetrical and are vertically and fixedly mounted at a middle position of the upper frame or the bottom frame in a front-back direction. The stable drilling device of the coal mine self-movement floor anchor rod, disclosed by the invention, can realize rapid drilling operation on a roadway floor under the condition that a reversed supporting force is provided in a drilling process, so that the mounting speed of the anchor rod is wholly improved; and the stable drilling device is adaptive to the requirements of rapidly forming a roadway.

Description

technical field [0001] The invention relates to a drilling device, in particular to a coal mine self-moving bottom plate bolt stabilizing device suitable for drilling and bolt support for roadway bottom plates in coal mines, 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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