Rapid tunneling method for coal mine bottom drainage roadway

Abstract

The invention provides a rapid tunneling method for a coal mine bottom drainage roadway, and relates to the technical field of coal roadway tunneling. According to the method, a roadway support design scheme is determined, wherein bottom drainage roadway support parameter design and bottom drainage roadway support design checking are involved; in the bottom drainage roadway support parameter design, an anchor net and anchor cable combined support mode is adopted, and roadway roof support parameter design and roadway two-side support parameter design are involved; the rapid bottom drainage roadway tunneling process comprising gangue cutting, shed erecting, anchor cable permanent support and lagging anchor rod reinforcing support is adopted, wherein the construction process of the rapid tunneling process comprises the following steps of performing gangue cutting, performing shed erecting, performing anchor cable permanent support and constructing a top angle anchor rod and a side angle anchor rod on the side of an air duct; and parallel operation is performed, wherein anchor rod reinforcing support after secondary transportation is performed, and then returning to the shed is performed. The method utilizes the geological conditions of a bottom drainage roadway roof well, fully utilizes equipment, time and space of the tunneling working face, achieves parallel operation of all tunneling procedures to the maximum extent, shortens the circulation time, increases the daily circulation times, and greatly improves the tunneling efficiency of the bottom drainage roadway.

Description

technical field [0001] The invention relates to the technical field of coal roadway excavation, in particular to a method for rapid excavation of coal mine bottom pumping roadways. Background technique [0002] In order to reduce the gas content of coal roadways in high-gas and high-outburst mines, eliminate the risk of outbursts, and cover the normal tunneling of coal roadways, it is necessary to pre-dig the bottom drainage roadway before driving the coal roadway, and carry out gas drainage from the coal seam where the bottom suction roadway is located. Due to the low excavation speed of the bottom pumping roadway, it will seriously affect the normal continuity and sustainable production of the mining face. Poor effect, etc. lead to low efficiency of coal roadway excavation. [0003] Therefore, the main problem that needs to be solved to improve the excavation efficiency and alleviate the tension of connection is the gas problem. Therefore, the construction of the bottom r...

AI Technical Summary

Problems solved by technology

[0004] The low excavation efficiency of the bottom pumping roadway leads to the problem of unbalanced mine excavation; the two sides of the bottom pumping roadway are sandy mudstone, and the side parts are loose or large-area pieces during the excavation; during the gangue cutting, there is a lot of dust in the roadway, the visibility is extremely low, and the bolt lags behind The support is difficult to see and the operation is slow; as the main battlefield of coal roadway excavation, the bottom pumping roadway requires multiple general drills and 1,000-meter drilling rigs to drill holes in the roadway. As a result, the track line cannot be extended to the working surface, resulting in transportation difficulties and other problems

Images