Roadway floor heave prevention and control method

By performing hydraulic fracturing in the top slate rock layer above the tunnel, the problem of the tunnel bottom drum is solved, the mining stress of the tunnel is reduced, the overall stress state of the tunnel is improved, and the safe and efficient development of coal resources is achieved.

CN119754781AInactive Publication Date: 2025-04-04CCTEG COAL MINING RES INST +1
12 Cites 0 Cited by

Patent Information

Application Number
CN202510273384.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-03-10
Publication Date
2025-04-04
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

The problem of tunnel bottom drum is serious in underground mining environments such as coal mines, resulting in underground transportation and ventilation obstacles, overall tunnel instability, difficult and costly management, affecting the safe and efficient development of coal resources.

Method used

By opening main drilling holes and branch holes in the top slab rock layer above the intended treatment tunnel, hydraulic fracturing is performed, the top slab fracturing layer is cut off, the tunnel is reduced to the mining stress and the bottom drum volume is reduced.

Benefits of technology

Effectively reduce the volume of the tunnel under the drum, reduce the impact of the tunnel by mining, improve the overall stress status of the tunnel, reduce the cost of governance, and improve the safe and efficient development capabilities of coal resources.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The roadway floor heave prevention and control method comprises the following steps that S1, a roof rock stratum with the thickness larger than or equal to a first preset value and the compressive strength larger than or equal to a second preset value above a to-be-treated roadway is divided into a roof fracturing layer; s2, a main drill hole is formed in the top plate fracturing layer, and the extending direction of the main drill hole is consistent with the extending direction of the laneway to be treated; s3, a plurality of branch holes communicating with the main drill hole are formed in the roof fracturing layer, at least one of the branch holes extends upwards from the main drill hole, and / or at least one of the branch holes extends downwards from the main drill hole; and S4, hydraulic fracturing is conducted on the top plate fracturing layer through the main drill hole and the branch holes. According to the roadway floor heave prevention and treatment method, the roadway floor heave quantity can be effectively reduced.
Need to check novelty before this filing date? Find Prior Art