Coal mine underground four-upright-post positioning bottom plate anchor rod drilling device

Abstract

The invention discloses a coal mine underground four-upright-post positioning bottom plate anchor rod drilling device, which comprises a bottom frame (1), work components (2), an upper frame (3) and device positioning components (4), wherein the upper frame is fixedly arranged on the bottom frame; the work components (2) are arranged on the bottom frame, and comprise a body (21), front and back guide through grooves (22), front and back positioning locking screw nuts (23), left and right guide through grooves (24), left and right positioning locking screw nuts (25), a drilling machine installing frame (26) and a drilling machine (27); each device positioning component comprises positioning support two-way telescopic hydraulic cylinders (41) and a control valve group (42); the four positioning support two-way telescopic hydraulic cylinders are vertically and fixedly arranged in the diagonal line positions of the upper frame or the bottom frame by using the cylinder body centers as the symmetry axis. The coal mine underground four-upright-post positioning bottom plate anchor rod drilling device has the advantages that the structure is simple; the fast drilling on a roadway floor can be realized in the drilling process on the premise of providing the reverse support force; the anchor installing speed is integrally accelerated; the requirement of fast lane formation can be met.

Description

technical field [0001] The invention relates to a drilling device, in particular to a coal mine four-column positioning bottom plate bolting device suitable for drilling and bolting 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 struct...

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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