Anchor rod drilling device for coal mine bottom plate

Abstract

The invention provides an anchor rod drilling device for a coal mine bottom plate, which comprises a base 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 base frame; the working part is mounted on the base frame and comprises a body (21), front and rear guide grooves (22), front and rear positioning clamps (23), left and right guide grooves (24), left and right positioning clamps (25), a drilling machine mounting rack (26) and a drilling machine (27); and the device positioning part comprises a top positioning support hydraulic cylinder (41), a bottom positioning support hydraulic cylinder (42) and a control valve bank (43), and the control valve bank is respectively connected with the top positioning support hydraulic cylinder and the bottom positioning support hydraulic cylinder. The anchor rod drilling device for the coal mine bottom plate has a simple structure, can realize quick drilling operation on a laneway bottom plate on the premise of supplying reverse support force in the drilling process so as to integrally increase the anchor rod mounting speed, and meets the requirement for quickly forming laneways.

Description

technical field [0001] The invention relates to a drilling device, in particular to a coal mine bottom plate bolt drilling 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 structure, etc., th...

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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