A device for preparing filling material underground and a method for filling and supporting empty tunnels

By designing a device for preparing filling materials from the hole and screening and mixing raw coal with a horizontal rotary cage, the problems of loose structure of the underground filling body and waste of refined coal resources are solved, and an efficient and resource-saving filling process is achieved.

CN112844215BActive Publication Date: 2025-03-18BEIJING TIANDI HUATAI MINING MANAGEMENT CO LTD +1
1 Cites 0 Cited by

Patent Information

Application Number
CN202110203139.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2021-02-24
Publication Date
2025-03-18
Estimated Expiration
2041-02-24

AI Technical Summary

Technical Problem

During the coal mining process in the deep storage underground, although the direct filling of raw coal underground reprinted underground coal is simple and efficient, the filling structure is loose and requires mechanical tamping, which increases the workload and causes waste of refined coal resources.

Method used

A device for preparing filler is designed for underground preparation, and the raw coal is screened and mixed with horizontal rotary cages. The refined coal is first screened out, and then mixed with the binding agent slurry to make the filler filler to fill the empty passages to avoid waste of refined coal and improve the load-bearing capacity and pressure characteristics of the filler.

Benefits of technology

Through the use of this device, the waste of refined coal is avoided, the load-bearing capacity and pressure characteristics of the empty tunnel filling body are improved, the workload is reduced, and an efficient filling process is achieved.

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

Abstract

The present invention discloses an underground device for preparing filling materials and an empty tunnel filling and supporting method. The device comprises a horizontal rotating cage, a shell, and an adjustable inclination bracket. The shell is sleeved on the outside of the horizontal rotating cage, and the adjustable inclination bracket is arranged at the lower part of the shell. A feed port and a discharge port are arranged at both ends of the horizontal rotating cage. The feed port is connected to a coal conveying belt conveyor, and the discharge port is connected to a transfer belt conveyor. The shell is divided into a screening area and a mixing area. The operation steps of preparing filling materials and filling empty tunnels include: 1. adjusting the inclination angle of the adjustable inclination bracket; 2. intermittently adding a binder slurry to the mixing area on the shell through a grouting pipe by a slurry making device on the well; 3. sending raw coal into the horizontal rotating cage to screen the raw coal and mix the filling materials; 4. The filling materials are transferred on the transfer belt conveyor; 5. filling. The present invention avoids the use of clean coal to fill the empty tunnel. At the same time, the filling body structure obtained by mixing dry and wet filling materials is more stable and has good pressure performance.
Need to check novelty before this filing date? Find Prior Art