Stable drilling device for drill hole on anchor rod of underground coal mine roadway floor

Abstract

The invention discloses a stable drilling device for rock bolt drilling on the bottom plate of coal mine underground roadway, which comprises a bottom frame (1), a working part (2), an upper frame (3) and a device positioning part (4); the upper frame is fixedly installed on the bottom frame The working parts are installed on the chassis, including the main body (21), the front and rear guide slots (22), the front and rear positioning lock nuts (23), the left and right guide slots (24), the left and right positioning lock nuts (25), the drilling rig Mounting frame (26) and drilling rig (27); device positioning components include top positioning support hydraulic cylinder (41), bottom positioning support hydraulic cylinder (42) and control valve group (43), control valve group and top positioning support hydraulic cylinder respectively It is connected with the bottom positioning support hydraulic cylinder. This device has a simple structure and can quickly drill the bottom plate of the roadway under the premise of providing reverse support force during the drilling process, improving the installation speed of the bolt and meeting the requirements of rapid roadway formation. .

Description

technical field [0001] The invention relates to a drilling device, in particular to a coal mine underground roadway bottom plate anchor rod drilling stable 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, m...

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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