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Goaf longitude and latitude filling method

A technology of goaf and latitude and longitude, applied in the direction of filling, mining equipment, earth cube drilling and mining, etc., can solve the problems of large investment in filling equipment, loss of coal resources, low construction efficiency, etc., and achieve low construction cost, low cost, and protection Aquifer Effect

Inactive Publication Date: 2020-02-07
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Using the caving method to deal with the goaf will cause surface subsidence and cause environmental problems; while the coal pillar support method will cause the loss of coal resources; therefore, using the filling method to deal with the goaf has become the most effective method, but the existing filling system and filling The investment in equipment is large, and the construction efficiency is low, which cannot meet the needs of continuous mining

Method used

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  • Goaf longitude and latitude filling method
  • Goaf longitude and latitude filling method
  • Goaf longitude and latitude filling method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Due to the existing filling mining method, the filling construction operation is complicated and the filling cost is high; in order to simplify the filling operation steps, reduce the construction cost of the filling body, and ensure that the roof of the goaf does not collapse, so as to effectively control the surface subsidence and protect the aquifer. The recovery rate of coal resources; a method for filling the goaf in the shape of latitude and longitude is provided, and the steps include:

[0029] Step 1. Open the cutting hole on the working face, and the coal cutter stops cutting coal after every two knives of coal are cut obliquely.

[0030] Step 2. Starting from the roadside of the mining roadway on both sides of the goaf, a filling body with a width of W is arranged along the direction of the working face at every interval c.

[0031] Step 3. The working face continues to advance, and the inclined filling body with a width of W is arranged along the working face...

Embodiment 2

[0038] A method for filling a goaf in a latitude and longitude shape, capable of filling in a goaf to form a latitude and longitude shape, ensuring that the roof of the goaf does not collapse, and effectively controlling surface subsidence. The steps include:

[0039] Step 1. Lay gangue paste conveying pipes in the transport leveling of the working face, and arrange filling pumps and mixers at the same time; then cut holes in the working face, and the coal cutter cuts coal every two knives and cuts obliquely before stopping coal cutting.

[0040] Step 2. Starting from the roadside of the mining roadway on both sides of the goaf, a filling body with a width of W is arranged along the direction of the working face at every interval c. Specifically, a strike filling space is arranged at regular intervals along the direction of inclination. The establishment of the space can be surrounded by a conventional filling and mining baffle structure. Filling can be arranged on both sides o...

Embodiment 3

[0050] In this embodiment, the structure and construction method of the latitude and longitude filling system in the goaf are further described.

[0051] The latitude and longitude filling system in the goaf can construct a latitude and longitude filling body in the goaf, including gangue paste conveying pipe 1, mixer 2, filling pump 3, hydraulic support 4, direction filling pipe 5, inclined filling pipe 6, and wooden piles 7, move toward baffle plate 8, tend to baffle plate 9. The gangue paste conveying pipe is arranged in the transport tunnel 10, and transports materials in the transport tunnel 10. The mixer 2 and the filling pump 3 are connected through the paste conveying pipe, and the filling pump 3 is connected with the direction filling pipe 5 and the inclined filling pipe 6 through the paste conveying pipe 1. The mixer 2 stirs the materials to make gangue-like paste filling materials. Pump 3 pumps filling material to the working face. The direction filling pipe at th...

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Abstract

The invention provides a goaf longitude and latitude filling method, and relates to the technical field of underground filling mining. The method comprises the steps that after a first cut is started,a trend filling body is arranged behind the working face after the working face is pushed, a tendency filling body is constructed before the distance pushed by the working face reaches periodic weighing length, then the working face is continuously pushed, the trend filling body is continuously constructed, the tendency filling body is circularly arranged until the working face is pushed to a stop mining line, and construction of a longitude and latitude filling body is completed. The method can be implemented by means of a goaf longitude and latitude filling system, wherein the filling system comprises a gangue pasty fluid conveying pipe, a stirrer, a filling pump, a hydraulic support, a trend filling pipe, a tendency filling pipe, a wood pile, a trend baffle and a tendency baffle, and the filling pump is connected with the trend filling pipe and the tendency filling pipe through the gangue pasty fluid conveying pipe. The method is simple and convenient to operate, the construction cost of the filling body is low, a roof of goaf is not collapsed, then the surface subsidence is effectively controlled, aquifer can be further protected, and the recovery rate of coal resources is improved.

Description

technical field [0001] The invention relates to the technical field of downhole filling and mining, in particular to a method for filling in goafs in the shape of warp and weft. Background technique [0002] The filling mining method is a mining method that artificially supports the goaf. With the advancement of the mining face, filling materials are sent to the goaf to manage the ground pressure, control the collapse of the surrounding rock and the movement of the ground surface, and in the formed filling mining on or under its protection. Especially in the three-down mining, the filling mining method is widely used, the filling mining has strong adaptability, high recovery rate, and protects the surface; however, the process is complicated, the cost is high, and the construction efficiency of the gob overall filling in coal mining is low. [0003] With the rapid development of the economy, the demand for coal resources has also increased rapidly. During the mining process...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F15/00
CPCE21F15/00
Inventor 郭忠平张福玉陈道志冷超周翔张笃学
Owner SHANDONG UNIV OF SCI & TECH
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