CN214096509U

CN214096509U - Fully mechanized mining face rack rear goaf air leakage limit range testing system

Info

Publication number: CN214096509U
Application number: CN202022518628.4U
Authority: CN
Inventors: 王大设; 秦汝祥; 于学雷; 杨应迪; 马彬; 黄有为
Original assignee: Anhui University of Science and Technology; Huaibei Mining Co Ltd
Current assignee: Anhui University of Science and Technology; Huaibei Mining Co Ltd
Priority date: 2020-11-04
Filing date: 2020-11-04
Publication date: 2021-08-31
Anticipated expiration: 2030-11-04

Abstract

The utility model discloses a goaf air leakage limit range test system behind fully mechanized mining working face frame, including machine lane, goaf and working face, the machine lane sets up the lateral wall at both ends of goaf and working face, be equipped with first wind tunnel between working face and the goaf, the working face both ends are equipped with second wind tunnel and third wind tunnel respectively, wherein establish ties UNICOM between first wind tunnel, second wind tunnel and the third wind tunnel; by adopting the scheme of the utility model, the arrangement of the measuring points and the beam tubes along the inclined direction of the working face adopts a trenching and pre-embedding mode, and the strength of high-pressure software is ensured without damaging the beam tubes protected inside; the method is a mature and reliable method by adopting tracer gas release and collection, and is characterized in that a plurality of rows of beam tube measuring points are arranged in a real goaf, a gas sample of the measuring points in a two-dimensional space of the whole goaf is collected at one time, and the goaf air leakage limit range is judged.

Description

Fully mechanized mining face rack rear goaf air leakage limit range testing system

Technical Field

The utility model belongs to mine ventilation safety field, more specifically says, the utility model relates to a goaf limit range test system that leaks out behind fully mechanized mining working face frame.

Background

In the working face mining process, the roof behind the frame falls to form a goaf of porous media, and because the air flow turns at a 90-degree right angle at the lower corner of the working face, under the influence of inertia, part of the air flow enters the goaf behind the frame to form air leakage, and the air leakage entering the goaf behind the working face frame can ventilate and supply oxygen to the coal left in the goaf, induce the spontaneous combustion of the coal left in the goaf, and threaten the production safety of the working face; the range of the goaf is wide, the spontaneous combustion dangerous area of the residual coal in the goaf is defined, the fire-extinguishing work in the goaf can be purposefully developed, and the spontaneous combustion area of the goaf is within the air leakage range of the goaf according to the occurrence condition of spontaneous combustion of the coal, so that the blindness of the fire-extinguishing work in the goaf can be greatly reduced by determining the air leakage limit range of the goaf; the determination of the goaf air leakage range is complex, and is related to the working face ventilation mode and the working face air quantity, the top and bottom plate lithology characteristics of the coal seam, the working face and the roadway arrangement of the adjacent area of the working face, the air flow direction and the energy distribution, so that the determination of the goaf air leakage is always important research content in coal mine production and scientific research; the method mainly adopts similar material simulation, numerical simulation and field measurement at present, wherein the field measurement is the most reliable research method, but the key of accurately testing the air leakage of the goaf is the testing scheme of the goaf air leakage under the filling of falling rocks of the goaf, and the air leakage range of the goaf behind the fully mechanized mining face frame can be accurately tested only by a good testing scheme.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a goaf limit range test system that leaks out behind full mechanized mining working face frame is provided that can effectively detect the goaf scope that leaks out of department.

In order to realize the purpose, the utility model discloses the technical scheme who takes does: the fully mechanized mining working face post-frame goaf air leakage limit range testing system comprises a machine lane, a goaf and a working face, wherein the machine lane is arranged on the side walls of two end portions of the goaf and the working face, a first air lane is arranged between the working face and the goaf, a second air lane and a third air lane are respectively arranged at two end portions of the working face, and the first air lane, the second air lane and the third air lane are communicated in series.

The utility model discloses a fully mechanized mining working face frame back collecting space area limit range test system that leaks out, the second wind tunnel with first wind tunnel right angle handing-over department is equipped with the tracer gas releaser, fixed connection between tracer gas releaser and the first wind tunnel.

The utility model discloses a combine and adopt goaf limit range test system that leaks out behind working face frame, third airway middle part is equipped with goaf gas collection station, and goaf gas collection station import department is equipped with the beam pipe, fixed connection between beam pipe one end and the goaf gas collection station, and the other end is equipped with the detection portion that leaks out, and the detection portion that leaks out is fixed to be set up in the goaf

The utility model discloses a goaf limit range test system leaks out behind full-mechanized mining face frame, the detection portion that leaks out includes that first detection branch, second detect branch and third detect the branch, and wherein first detection branch includes 1# row's measuring point, 2# row's measuring point and 3# row's measuring point, and the second detects the branch and includes 4# row measuring point, 5# row measuring point and 6# row measuring point, and the third detects the branch and includes 7# row measuring point, 8# row measuring point and 9# row measuring point.

By adopting the scheme of the utility model, the arrangement of the measuring points and the beam tubes along the inclined direction of the working face adopts a trenching and pre-embedding mode, when the working face is pushed, the working face enters a goaf through the bottom of the fully mechanized mining bracket, and the strength of high-pressure software is ensured without damaging the beam tubes protected inside; the method is a mature and reliable method by adopting tracer gas release and collection, and is characterized in that a plurality of rows of beam tube measuring points are arranged in a real goaf, a gas sample of the measuring points in a two-dimensional space of the whole goaf is collected at one time, and the goaf air leakage limit range is judged.

The present invention will be described in more detail with reference to the accompanying drawings and examples.

Drawings

The contents of the description and the references in the drawings are briefly described as follows:

FIG. 1 is a schematic view of the present invention;

labeled as: 1. a working surface; 2. a gob; 3. a first air way; 4. a second airway; 5. a third air way; 6. a machine lane; 7. a trace gas release tube; 8. a goaf gas collection station; 9. a bundle tube; 10. An air leakage detection unit; 11. a first detection branch; 12. a second detection branch; 13. a third detection branch;

Detailed Description

The following description of the embodiments of the present invention, with reference to the accompanying drawings, will be made in further detail to explain, for example, the shapes and structures of the components, the mutual positions and connection relationships among the components, the functions and working principles of the components, the manufacturing process, and the operation and use method of the components, so as to help those skilled in the art to understand the concept and technical solutions of the present invention more completely, accurately and deeply.

FIG. 1 is a schematic view of the present invention; the fully mechanized mining face goaf air leakage limit range testing system comprises a machine tunnel 6, a goaf 2 and a working face 1, wherein the machine tunnel 6 is arranged on the side walls of the goaf 2 and the two end parts of the working face 1, a first air tunnel 3 is arranged between the working face 1 and the goaf 2, a second air tunnel 4 and a third air tunnel 5 are respectively arranged at the two end parts of the working face 1, and the first air tunnel 3, the second air tunnel 4 and the third air tunnel 5 are communicated in series; a tracer gas releaser 7 is arranged at the right-angle joint of the second air lane 4 and the first air lane 3, and the tracer gas releaser 7 is fixedly connected with the first air lane 3; a goaf gas collecting station 8 is arranged in the middle of the third air tunnel 5, a beam tube 9 is arranged at the inlet of the goaf gas collecting station 8, one end of the beam tube 9 is fixedly connected with the goaf gas collecting station 8, an air leakage detection part 10 is arranged at the other end of the beam tube, and the air leakage detection part 10 is fixedly arranged in the goaf 2; the air leakage detection section 10 includes a first detection branch 11, a second detection branch 12, and a third detection branch 13, wherein the first detection branch 11 includes a 1# arrangement point, a 2# arrangement point, and a 3# arrangement point, the second detection branch 12 includes a 4# arrangement point, a 5# arrangement point, and a 6# arrangement point, and the third detection branch 13 includes a 7# arrangement point, an 8# arrangement point, and a 9# arrangement point.

When the device is used, a plurality of rows of gas collecting beam tubes 9 are pre-buried along a third air gallery 5 at the end part of a working face 1 to form a plurality of rows of measuring points, when the measuring points are arranged, a ditch is dug on a coal seam floor between the working face 1 and a fully mechanized mining support, the beam tubes 9 are protected by high-pressure steel wire hoses and buried in pre-dug post-support coal seam floor ditches, when the working face 1 is pushed, the beam tubes 9 enter a goaf 2 through the bottom of the fully mechanized mining support and are buried in positions of different depths of the goaf 2, after a plurality of rows of detection branches enter a pre-position of the goaf, a tracer gas releasing tube 7 is pre-buried at the joint of the first air gallery 3 and the second air gallery 4 to release tracer gas to the working face 1, and the tracer gas is diffused to a space of the goaf 2 within a certain range under the driving of post-support air leakage. At the moment, the goaf gas collection station 8 collects the gas of each measuring point of a plurality of measuring points in the goaf, a gas chromatograph is used for detecting whether the gas contains the tracer gas and the concentration of the tracer gas, and the air leakage limit range of the working face 1 is visually judged.

The present invention has been described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above-mentioned manner, and various insubstantial improvements can be made without modification to the method and technical solution of the present invention, or the present invention can be directly applied to other occasions without modification, all within the scope of the present invention.

Claims

1. The utility model provides a goaf limit range test system that leaks out behind full-mechanized mining working face frame, includes machine lane, goaf and working face, and the machine lane sets up at the both ends lateral wall of goaf and working face, its characterized in that: and a first air way is arranged between the working face and the goaf, a second air way and a third air way are respectively arranged at two ends of the working face, and the first air way, the second air way and the third air way are communicated in series.

2. The fully mechanized mining face goaf air leakage limit range testing system after erection of the frame according to claim 1, characterized in that a tracer gas releaser is arranged at the right-angle joint of the second air way and the first air way, and the tracer gas releaser is fixedly connected with the first air way.

3. The fully mechanized mining face after-frame goaf air leakage limit range testing system according to claim 1, characterized in that a goaf gas collecting station is arranged in the middle of the third air tunnel, a beam pipe is arranged at an inlet of the goaf gas collecting station, one end of the beam pipe is fixedly connected with the goaf gas collecting station, an air leakage detecting part is arranged at the other end of the beam pipe, and the air leakage detecting part is fixedly arranged in the goaf.

4. The fully mechanized mining face goaf rear-of-bay air leakage limit testing system of claim 3, characterized in that the air leakage detection section comprises a first detection branch, a second detection branch and a third detection branch, wherein the first detection branch comprises a 1# arrangement point, a 2# arrangement point and a 3# arrangement point, the second detection branch comprises a 4# arrangement point, a 5# arrangement point and a 6# arrangement point, and the third detection branch comprises a 7# arrangement point, an 8# arrangement point and a 9# arrangement point.