CN212837957U

CN212837957U - Device for blocking air leakage of upper corner of coal face

Info

Publication number: CN212837957U
Application number: CN202021596367.1U
Authority: CN
Inventors: 刘少泽; 郭寿松; 周捷; 黄君
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-04
Filing date: 2020-08-04
Publication date: 2021-03-30
Anticipated expiration: 2030-08-04

Abstract

The utility model provides a device for blocking air leakage of upper corners of coal mining working faces, which comprises a fixed bracket and fixed buckles distributed above the fixed bracket for installing and limiting; a connecting unit connected among the plurality of fixedly-mounted brackets; the bag plugging units are arranged between the connecting units and can change the volume of the bag plugging units; and the fastening bolts are arranged at the upper end and the lower end of the fixedly-mounted bracket and are used for fastening and supporting. The utility model is arranged in the air leakage area of the upper corner of the coal face, and the air leakage position of the upper corner is blocked to form an air guide windbreak; dilute upper corner gas, reduce gas concentration, avoided the gas accumulation phenomenon that collecting space area air leakage caused, stopped the gas and exceeded the limit occurence of failure, simultaneously, the utility model discloses can realize quick installation and reuse, have obvious result of use and economic value.

Description

Device for blocking air leakage of upper corner of coal face

Technical Field

The utility model belongs to the technical field of colliery gas disaster protection, improvement, concretely relates to coal face upper corner plugging device that leaks out.

Background

Along with the mine exploitation extends to the deep part, the gas pressure, the gas content, the ground stress and the gas emission amount of the coal seam all show obvious increasing trends. The research result shows that: the gas emission quantity of the mine is increased by 1m every time the mining depth of the mine extends downwards by 20m³Around/t, particularly in the southwest region, the gas pressure and the gas content of the coal bed are large, and the gas disaster is gradually serious. In 7 months in 2019, 3 serious gas disaster accidents happen in Sichuan and Guizhou provinces, 11 people die and 5 people are injured, and the direct economic loss is more than 1800 ten thousand yuan. The upper corner of the mine coal face is used as a passage through which gas in the goaf 15 flows out, and is influenced by the air flow pressure difference of the working face transportation lane 19 and the return air lane 18, the air flow speed is very low, the local part is in a vortex state, the gas is easily over-limited, and the mine coal face is a serious disaster area in which mine gas disaster accidents happen. At the present stage, aiming at the phenomenon that the upper corner is easy to cause gas accumulation, the air output of the working face is increased to dilute and reduce the gas concentration in the air flow, and a certain application effect is obtained. However, for the irregular area where the top plate collapses, no better method is provided for avoiding the occurrence of the gas overrun accident at the upper corner of the coal face due to the existence of the air leakage factor at the upper corner.

Disclosure of Invention

In view of this, the utility model discloses mining coal face upper corner plugging device that leaks out aims at providing an upper corner plugging device that leaks out and a plugging method that can be applicable to under the complicated industrial and mining circumstances in colliery, stops the gas transfinite, prevents that colliery gas incident from taking place, and social economic significance is significant.

In order to achieve the above object, the present invention comprises the following components:

the utility model provides a mining coal face upper corner air leakage plugging device, which comprises a fixed bracket and fixed buckles distributed above the fixed bracket for installing and limiting; a connecting unit connected among the plurality of fixedly-mounted brackets; the bag plugging units are arranged between the connecting units and can change the volume of the bag plugging units; and the fastening bolts are arranged at the upper end and the lower end of the fixedly-mounted bracket and are used for fastening and supporting.

The fixed mounting bracket is of an I-shaped steel structure made of cast iron, is fixedly mounted between the top plate and the bottom plate of the coal seam through fastening bolts, and can adjust the size and range of the air leakage plug of the upper corner by adjusting the number and the position of the fixed mounting bracket;

the fixing buckle is a semicircular metal component welded on the fixing bracket; the connecting unit is a multi-strand steel wire rope structure with the diameter of 5mm and subjected to coating and corrosion prevention treatment, and is hinged and arranged on a fixing buckle on the surface of the fixing bracket;

the bag plugging unit is a hollow inflatable bag structure; hinged buckles capable of being fixed on the connecting unit are distributed on the periphery of the bag plugging unit; the outer wall of the bag plugging unit is made of an airtight waterproof telescopic multilayer elastic material and comprises the following components from outside to inside: diene elastic fiber, butadiene styrene-butadiene-pyridine rubber, polyurethane elastic fiber and acrylic acid waterproof coating; the compression strength of the bag plugging unit is not lower than 2MPa, the volume change adjustment can be realized by inflating the bag plugging unit, and the volume increase range is 10-50%; when the bag plugging units are not inflated and expanded, gaps among the bag units can be used as gas extraction embedded pipelines;

the fastening bolt is an expandable galvanized hexagonal bolt commonly used in mines and is not described in detail.

The utility model discloses beneficial effect: the utility model discloses the mining coal face upper corner plugging device that leaks out that founds formation has avoided the gas accumulation phenomenon that collecting space area leaks out and causes, has stopped the gas and has transfinited the occurence of failure. And simultaneously, the utility model discloses can realize quick installation and reuse, have obvious result of use and economic value.

Drawings

The invention will be further described with reference to the following figures and examples:

fig. 1 is a schematic structural view of the coal mining coal face upper corner air leakage plugging device of the utility model;

fig. 2 is a schematic diagram of a bag plugging unit of the coal mining working face upper corner air leakage plugging device of the utility model;

fig. 3 is a schematic structural view of the outer wall of the bag plugging unit of the coal mining working face upper corner air leakage plugging device of the utility model;

fig. 4 is a schematic plan view of the device for blocking the air leakage at the upper corner of the coal face for coal mine in actual use.

The main element symbols are as follows:

the device comprises a fixed support 1, a fixed buckle 2, a connecting unit 3, a bag plugging unit 4, a fastening bolt 5, a gap 6, a hinged buckle 7, diene elastic fibers 8, butadiene styrene-butadiene rubber 9, polyurethane elastic fibers 10, an acrylic acid waterproof coating 11, a coal seam bottom plate 12, an air leakage plugging device 13, a hydraulic support 14, a goaf 15, a working face coal mining machine 16, a stoping direction 17, an air return roadway 18, a transportation roadway 19 and a coal seam top plate 20.

Detailed Description

The utility model discloses mining coal face upper corner plugging device that leaks out does more detailed description below with the accompanying drawing:

as shown in fig. 1, the utility model provides a mining coal face upper corner plugging device that leaks out, including the solid fixed support 1, distribute over the solid fixed support 1 and be used for installing spacing fixed buckle 2; a connecting unit 3 connected between the plurality of fixedly-mounted brackets 1; a bag plugging unit 4 which is arranged between the connection units 3 and can change the volume of the bag; and the fastening bolts 5 are arranged at the upper end and the lower end of the fixedly-mounted bracket 1 and are used for fastening and supporting.

The fixed mounting bracket 1 is of a cast iron I-shaped steel structure, is fixedly mounted between the top and the bottom plate of the coal seam through a fastening bolt 5, and can adjust the size and range of the upper corner air leakage plug by adjusting the number and the position of the fixed mounting bracket 1;

the fixed buckle 2 is a semicircular metal component welded on the fixed bracket 1; the connecting unit 3 is a multi-strand steel wire rope structure with the diameter of 5mm and subjected to film coating and corrosion prevention treatment, and is hinged and arranged on the fixed buckle 2 on the surface of the fixed bracket 1;

the pouch blocking unit 4 is a hollow, inflatable pouch structure as shown in fig. 1, 2 and 3; hinged buckles 7 which can be fixed on the connecting unit 3 are distributed around the bag plugging unit 4; the outer wall of the bag plugging unit 4 is made of an airtight waterproof telescopic multilayer elastic material and comprises the following components from outside to inside: diene elastic fiber 8, butadiene styrene-butadiene-pyridine rubber 9, polyurethane elastic fiber 10 and acrylic acid waterproof coating 11; the compression strength of the bag plugging unit 4 is not lower than 2MPa, the volume change adjustment can be realized by inflating the bag plugging unit 4, and the volume increase range is 10-50%; when the bag plugging units 4 are not inflated and expanded, gaps 6 among the bag plugging units 4 can be used as gas extraction embedded pipelines;

correspondingly, as shown in fig. 4, the utility model discloses a coal face upper corner plugging device that leaks out's for coal mine application method specifically includes the step:

s1: the fixing bracket 1 of the utility model is fixed between the top and the bottom plate of the coal seam by the fastening bolt 5;

s2: the connecting unit 3 of the utility model is tightly arranged on the fixed buckle 2 on the fixed bracket 1, and the tension of the connecting unit 3 is adjusted to a proper value;

s3: a plurality of bag plugging units 4 with proper sizes are hinged on the connecting unit 3 through hinged buckles 7 distributed on the whole body and inflated, and the bag plugging units 4 expand under the action of air pressure to plug the air leakage positions of upper corners to form an air guide air barrier;

s4: the wind barrier guides wind to form wind flow, gas at the upper corner is diluted, the gas concentration is reduced, and the occurrence of gas accumulation overrun accidents is prevented;

s5: when the caving area of the coal seam roof 20 changes or the use range and the place of the utility model need to be adjusted along with the advancing of the working face, the steps S1-S4 are repeated.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. A coal face upper corner plugging device that leaks out which characterized in that: the device comprises a fixed mounting bracket and fixed buckles distributed above the fixed mounting bracket and used for mounting and limiting; a connecting unit connected among the plurality of fixedly-mounted brackets; the bag plugging units are arranged between the connecting units and can change the volume of the bag plugging units; and the fastening bolts are arranged at the upper end and the lower end of the fixedly-mounted bracket and are used for fastening and supporting.

2. The device for blocking the air leakage of the upper corner of the coal face as claimed in claim 1, wherein: the fixed mounting bracket is of an I-shaped steel structure made of cast iron, is fixedly mounted between the top plate and the bottom plate of the coal seam through fastening bolts, and can adjust the size and range of the air leakage plug of the upper corner by adjusting the number and the position of the fixed mounting bracket;

the fixing buckle is a semicircular metal component welded on the fixing bracket; the connecting unit is a multi-strand steel wire rope structure with the diameter of 5mm and subjected to coating and corrosion prevention treatment, and the multi-strand steel wire rope structure is hinged to a fixing buckle on the surface of the fixing support.

3. The device for blocking the air leakage of the upper corner of the coal face as claimed in claim 1, wherein: the bag plugging unit is a hollow inflatable bag structure; hinged buckles capable of being fixed on the connecting unit are distributed on the periphery of the bag plugging unit; the outer wall of the bag plugging unit is made of an airtight waterproof telescopic multilayer elastic material and comprises the following components from outside to inside: diene elastic fiber, butadiene styrene-butadiene-pyridine rubber, polyurethane elastic fiber and acrylic acid waterproof coating; the volume change of the bag plugging unit can be adjusted by inflating the bag plugging unit; when the bag plugging units are not inflated and expanded, gaps among the bag units can be used as gas extraction embedded pipelines.