CN101915119A

CN101915119A - Method for preventing gas explosion of driving face in coal mine

Info

Publication number: CN101915119A
Application number: CN 201010267739
Authority: CN
Inventors: 安艾江
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-08-31
Filing date: 2010-08-31
Publication date: 2010-12-15
Anticipated expiration: 2030-08-31
Also published as: CN101915119B

Abstract

The invention relates to a gas treatment technology, in particular to a method for preventing gas explosion of a driving face in a coal mine, which is used for solving the problem of treating gas in a driving tunnel and a working face. In the method, a tunnel is always divided into two layers of one air inlet tunnel and one air return tunnel by adopting a measure of continuously arranging an isolating layer to follow the schedule of the coal wall in front of the driving face. Compared with the prior art, the tunnel is divided into two layers of one air inlet tunnel and one air return tunnel, the air inlet tunnel is relatively closed without generating gas accumulation, and the personnel and equipment can safely work in the air inlet tunnel.

Description

The method of control gas explosion of driving face in coal mine

Technical field

The present invention relates to a kind of gas control technology, be specially a kind of method of preventing and treating gas explosion of driving face in coal mine.

Background technology

The measure of the control gas explosion of the driving face in present domestic colliery mainly is the concentration that adopts forced ventilation to dilute face gas, make it to remain in the safe scope, the variation of monitoring gas density is strengthened in the generation of naked light under the strict control well simultaneously.These ways are effective in theory, but in actual production, but find problems, the control problem of burning things which may cause a fire disaster for example, we can take various measures to control the generation of spark, for example take various explosion-proof electric equipments, but some unexpected burning things which may cause a fire disaster really are difficult to control.These unexpected burning things which may cause a fire disaster also are the key factors that gas explosion takes place.The equipment of existing at-once monitor monitoring gas density might be damaged, in case be damaged, just might cause that accident takes place.On draft type, existing draft type is that ventilation fan connection diameter is the ventilating duct of 0.5-0.8 rice, dilutes the gas of work plane by continual air-supply, and in the process of mining, must guarantee the uninterrupted perforation of air intake and return air.Its shortcoming is also to retain in hundreds of meters the distance from the connection roadway road junction to coal-face to blow out the coal mining process or the gushing out of a large amount of gas that the machine pick produces, and the accumulation of gushing out of two gas of helping, and these gas can not obtain good dilution process.After gas runs up to finite concentration, the danger of blast is arranged still.

Summary of the invention

The present invention is in order to solve in the digging laneway and the problem of the improvement of the gas of work plane and a kind of method of preventing and treating gas explosion of driving face in coal mine is provided.

The present invention is realized by following technical scheme, a kind of method of preventing and treating gas explosion of driving face in coal mine, in the tunnelling process, adopt constantly install separation layer follow driving face front coal wall progress measure all the time with the tunnel from vertically being divided into double-layer structure, wherein one deck is an intake, and another layer is the return aircourse.

Described double-layer structure is the ectonexine structure, and internal layer is an intake, is semicircle arch or trapezium structure, and skin is the return aircourse.Described double-layer structure is the levels structure, and lower floor is an intake, and the upper strata is the return aircourse; Described double-layer structure is lane, a left and right sides structure, and a side is an intake, and opposite side is the return aircourse.

This separation layer can be steel plate, concrete prefabricated board, materials such as glass epoxy are made, make the template of respective shapes after, in the tunnel, constantly connect and prolong along with the propelling of work plane, be transported to the use tunnel in after can the field fabrication industry can utilizing mould prefabricated

Compared with prior art, the present invention is divided into two the tunnel, an air intake,, a return air, the air intake lane is relatively independent airtight, can not produce the methane accumulation phenomenon, personnel and machinery equipment all can be in intake trouble free service, and the sectional area in air intake lane becomes big, the return air effect is very good.Described separation layer is closelyed follow with work plane all the time; the gas of gushing out in the coal mining process just enters return airway at once in the distance dilution back that surpasses 0.5 meter; and quilt is taken out of the tunnel; the gas of work plane is taken away by rapid dilution all the time; can not produce accumulation phenomena; the coal cinder that produces in the tunneling process drops and also can have been protected the staff by isolation; the gas of tunnel coal group generation simultaneously also can be drained by return airway; can never enter the air intake lane; when the mechanical device in the air intake lane produces naked light; can not contact yet, thereby guarantee being perfectly safe of tunnel with gas.Dust content with work plane in the intake has reduced more than 90%, has protected that the workman's is healthy.Remove booster, saved the electricity charge of ventilating.

Description of drawings

Fig. 1 is one of embodiments of the present invention

Fig. 1 a is the vertical view of Fig. 1

Fig. 2 is two of embodiments of the present invention

Fig. 2 a is the lateral view of Fig. 2

Fig. 3 is three of embodiments of the present invention

Fig. 3 a is the lateral view of Fig. 3

Among the figure: 1-separation layer, 2-return airway road junction, 3-separation layer termination and gas dilution point, 4-work plane front coal wall, 5-separation layer tie point, the outer coal wall of 6-, 7-intake, 8-return aircourse.

The specific embodiment

A kind of method of preventing and treating gas explosion of driving face in coal mine, in the tunnelling process, the measure of adopting constantly installation separation layer 1 to follow the progress of driving face front coal wall 4 is divided into double-layer structure with the tunnel all the time, and wherein one deck is an intake 7, and another layer is return aircourse 8.

Specific embodiment 1 is illustrated as Fig. 1,1a, and described double-layer structure is the ectonexine structure, and internal layer is an intake 7, is semicircle arch or trapezium structure, and skin is return aircourse 8.What digging advanced access adit is shaped as the semicircle arch, and specification is wide 1.8 meters high 1.8 meters, and is trapezoidal, and 2 meters of bottom width are risen 1.8 meters, 1.8 meters of top widths; It is wide 3.5 meters to be increased to the semicircle arch when tunneling 20 meters left and right sides, high 3,5 meters, and trapezoidal bottom width is added to 3.5 meters, and top width is increased to 2.5 meters, high 3.5 meters.Begin to build separation layer then, open return airway road junction 2 at outer rib simultaneously, (also can adopt connection roadway), this tunnel leads to return airway; The termination of ectonexine ventilation separation layer and gas dilution point 3, with coal-face front rib 4, left and right sides rib 6, the distance of top board must not be greater than 0.5 meter, the a large amount of gas that produce in the work plane coal mining activity process can diluted taking out of on the distance of 0.5 meter of distance work plane.

Specific embodiment 2 is illustrated as Fig. 2,2a, and described double-layer structure is the levels structure, and lower floor is an intake 7, and the upper strata is return aircourse 8; The height of beginning digging laneway mouth is 1.8 meters, width is 3.5 meters, when tunneling 20 meters left and right sides, increase to 3.5 meters, begin to construct separation layer the tunnel is divided into two parts up and down, open the return airway road junction at 20 meters of right side, upper strata coal wall, (also can adopt connection roadway) simultaneously, this access adit leads to return airway, the space length of the termination of levels ventilation separation layer and gas dilution point and coal-face front rib and top board is not more than 0.5 meter, and 5 meters of every drivings, separation layer in time follow up and build 5 meters.

Specific embodiment 3 is illustrated as Fig. 3,3a, and described double-layer structure is the gauche form structure, and a side is an intake 7, and opposite side is return aircourse 8.Beginning digging laneway mouth, highly be 4 meters, wide 2 meters, when tunneling 20 meters left and right sides, be widened to 4 meters, begin to build separation layer the tunnel is divided into left and right sides two parts, return airway road junction (also can adopt connection roadway) is excavated at 20 meters of coal wall, right lane, this access adit leads to return airway, the space length of the termination of lane, left and right sides ventilation separation layer and the front rib of gas dilution point and coal-face and side rib all must not be greater than 0.5 meter, dash separation layer in the left and right sides guarantees continuity along with driving in time follows up according to certain distance.

Claims

1. method of preventing and treating gas explosion of driving face in coal mine, it is characterized in that: in the tunnelling process, the measure of adopting constantly the installation separation layer to follow the progress of driving face front coal wall is a double-layer structure with the tunnel all the time, and wherein one deck is an intake, and another layer is the return aircourse.

2. the method for control gas explosion of driving face in coal mine according to claim 1 is characterized in that: described double-layer structure is the ectonexine structure, and internal layer is an intake, is semicircle arch or trapezium structure, and skin is the return aircourse.

3. the method for control gas explosion of driving face in coal mine according to claim 1 is characterized in that: described double-layer structure is the levels structure, and lower floor is an intake, and the upper strata is the return aircourse.

4. the method for control gas explosion of driving face in coal mine according to claim 1 is characterized in that: described double-layer structure is lane, a left and right sides structure, and a side is an intake, and opposite side is the return aircourse.

5. the method for control gas explosion of driving face in coal mine according to claim 1 is characterized in that: the termination of described separation layer and the distance of work plane are not more than 1.0 meters.