阅读说明：本技术 用于自动化综放工作面的放煤方法 (Coal caving method for automatic fully mechanized caving face ) 是由 翟文 马昆 任予鑫 张新新 刘阳 李俊孟 于 2020-05-18 设计创作，主要内容包括：本申请实施例提供的一种用于自动化综放工作面的放煤方法,所述方法在综放工作面采煤机下行放煤时,将采煤机的上端头斜切进刀,所述采煤机完全进入直线段后进刀完毕；控制所述采煤机以预设速度下行；当所述采煤机与液压支架间隔达到预设间距时,开启自动放煤作业,所述自动放煤作业以多台液压支架为一组进行放煤作业；每组液压支架中偶数号液压支架同时自动进行放煤,在所述偶数号液压支架完成放煤作业后,奇数号液压支架同时自动进行放煤；本申请综放工作面放煤工序不在需要人工操作,工作面液压支架根据采煤机的位置自动进行放煤作业,与人工放顶煤的效果相同,自动化放煤提高了工作面放煤效率,避免了人员操作的差异。(According to the coal caving method for the automatic fully-mechanized caving face, when a coal cutter of the fully-mechanized caving face descends to perform coal caving, the upper end head of the coal cutter is obliquely cut and fed, and feeding is completed after the coal cutter completely enters a straight line section; controlling the coal mining machine to descend at a preset speed; when the interval between the coal mining machine and the hydraulic support reaches a preset interval, starting automatic coal caving operation, wherein the automatic coal caving operation is carried out by taking a plurality of hydraulic supports as a group; the coal discharging of the even-numbered hydraulic supports in each group of hydraulic supports is automatically carried out at the same time, and the coal discharging of the odd-numbered hydraulic supports is automatically carried out at the same time after the coal discharging operation of the even-numbered hydraulic supports is finished; this application is fully mechanized and is put working face coal caving process and need not manual operation, and the working face hydraulic support carries out the coal caving operation according to the position of coal-winning machine is automatic, and is the same with the effect of artifical caving coal, and automatic coal caving has improved working face coal caving efficiency, has avoided the difference of personnel's operation.)

1. A coal caving method for an automatic fully mechanized caving face is characterized by comprising the following steps of:

obliquely cutting and feeding the upper end head of the coal mining machine, wherein the feeding of the coal mining machine is finished after the coal mining machine completely enters the straight line section;

controlling the coal mining machine to descend at a preset speed;

when the interval between the coal mining machine and the hydraulic support reaches a preset interval, starting automatic coal caving operation, wherein the automatic coal caving operation is carried out by taking a plurality of hydraulic supports as a group of hydraulic supports;

the coal discharging is automatically carried out on the even number hydraulic supports in each group of hydraulic supports at the same time;

and after the coal caving operation of the even-numbered hydraulic supports is finished, the coal caving of the odd-numbered hydraulic supports is automatically carried out at the same time.

2. The method for automated fully mechanized caving face coal caving according to claim 1, further comprising cleaning float coal on a fully mechanized face coal mining machine.

3. The method for caving coal for an automated fully mechanized caving face according to claim 2, wherein the shearer upgoing clean float coal comprises:

the coal cutter head is cut through;

controlling the coal mining machine to ascend at a preset speed;

when the interval between the coal mining machine and the hydraulic support reaches a preset interval, starting automatic coal caving operation, wherein the automatic coal caving operation is carried out by taking a plurality of hydraulic supports as a group of hydraulic supports;

the coal discharging is automatically carried out on the even number hydraulic supports in each group of hydraulic supports at the same time;

and after the coal caving operation of the even-numbered hydraulic supports is finished, the coal caving of the odd-numbered hydraulic supports is automatically carried out at the same time.

4. The coal caving method for the automatic fully mechanized caving face according to claim 1 or 3, wherein the hydraulic support automatically carries out coal caving, and the hydraulic support automatically carries out coal caving according to a preset cycle number;

the automatic coal discharging of each hydraulic support comprises:

the flashboard jack electromagnetic valve receives a recovery signal and controls the recovery of the flashboard jacks to continuously act for 2 seconds;

a tail beam jack electromagnetic valve receives a recovery signal, controls the recovery of the tail beam jack and continues to act for 3 seconds;

receiving a coal caving signal, controlling the coal caving action, and continuously acting for 3 seconds;

the tail beam jack electromagnetic valve receives the extension signal, controls the extension of the tail beam jack and continues to act for 4 seconds;

and the flashboard jack electromagnetic valve receives the extension signal, controls the extension of the flashboard jack and continuously acts for 6 seconds.

5. The method for the coal caving of the automated fully mechanized coal caving face according to claim 1 or 3, wherein the coal mining machine descends at a preset speed, and the preset speed is controlled to be 3m/min to 6 m/min.

6. The coal caving method for the automatic fully mechanized caving face according to claim 1 or 3, wherein the coal mining machine and the hydraulic support are spaced to reach a preset spacing, and the preset spacing is 10-16 hydraulic supports.

Technical Field

The application relates to the field of automatic coal caving, in particular to a coal caving method for an automatic fully mechanized caving face.

Background

The coal face is a first production site of coal, has the characteristics of narrow operation space, more mechanical equipment, poor visual environment and high temperature, has frequent safety accidents, seriously influences the safety management work of the whole coal mine, is a key area in the safety management work of the coal mine, is the development trend of the modern coal mining process for intelligent mining of the coal face, and is a great problem of automatic coal caving for how to realize intelligent coal caving in a coal caving procedure of a fully mechanized coal caving face and reduce working face operators.

At present, the coal caving procedure of the fully mechanized caving face needs manual operation. However, the coal caving technology of the coal caving workers is different, and the coal caving workers are affected by coal dust at the coal caving port in the coal caving process, so that the manual top coal caving effect of each hydraulic support on the working face is different.

Disclosure of Invention

The application provides a coal caving method for an automatic fully-mechanized caving face, which aims to solve the technical problem that the coal caving process of the fully-mechanized caving face needs manual operation and even results in uneven coal caving effect.

The invention provides a coal caving method for an automatic fully mechanized caving face, which comprises the following steps of:

obliquely cutting and feeding the upper end head of the coal mining machine, wherein the feeding of the coal mining machine is finished after the coal mining machine completely enters the straight line section;

controlling the coal mining machine to descend at a preset speed;

when the interval between the coal mining machine and the hydraulic support reaches a preset interval, starting automatic coal caving operation, wherein the automatic coal caving operation is carried out by taking a plurality of hydraulic supports as a group of hydraulic supports;

the coal discharging is automatically carried out on the even number hydraulic supports in each group of hydraulic supports at the same time;

and after the coal caving operation of the even-numbered hydraulic supports is finished, the coal caving of the odd-numbered hydraulic supports is automatically carried out at the same time.

In one possible design, the method further comprises cleaning float coal on the fully mechanized caving face shearer.

In one possible design, the shearer includes:

the coal cutter head is cut through;

controlling the coal mining machine to ascend at a preset speed;

when the interval between the coal mining machine and the hydraulic support reaches a preset interval, starting automatic coal caving operation, wherein the automatic coal caving operation is carried out by taking a plurality of hydraulic supports as a group of hydraulic supports;

the coal discharging is automatically carried out on the even number hydraulic supports in each group of hydraulic supports at the same time;

and after the coal caving operation of the even-numbered hydraulic supports is finished, the coal caving of the odd-numbered hydraulic supports is automatically carried out at the same time.

In one possible design, the hydraulic support automatically carries out coal caving, and the hydraulic support automatically carries out coal caving according to preset cycle times;

the automatic coal discharging of each hydraulic support comprises:

the flashboard jack electromagnetic valve receives a recovery signal and controls the recovery of the flashboard jacks to continuously act for 2 seconds;

a tail beam jack electromagnetic valve receives a recovery signal, controls the recovery of the tail beam jack and continues to act for 3 seconds;

receiving a coal caving signal, controlling the coal caving action, and continuously acting for 3 seconds;

the tail beam jack electromagnetic valve receives the extension signal, controls the extension of the tail beam jack and continues to act for 4 seconds;

and the flashboard jack electromagnetic valve receives the extension signal, controls the extension of the flashboard jack and continuously acts for 6 seconds.

In one possible design, the shearer moves downward at a preset speed, and the preset speed is controlled to be 3 m/min-6 m/min.

In one possible design, the distance between the coal mining machine and the hydraulic support reaches a preset distance, and the preset distance is 10-16 hydraulic supports.

According to the coal caving method for the automatic fully-mechanized caving face, when a coal cutter of the fully-mechanized caving face descends to perform coal caving, the upper end head of the coal cutter is obliquely cut and fed, and feeding is completed after the coal cutter completely enters a straight line section; controlling the coal mining machine to descend at a preset speed; when the interval between the coal mining machine and the hydraulic support reaches a preset interval, starting automatic coal caving operation, wherein the automatic coal caving operation is carried out by taking a plurality of hydraulic supports as a group; the even-numbered hydraulic supports in each group of hydraulic supports automatically discharge coal, and the odd-numbered hydraulic supports automatically discharge coal after the even-numbered hydraulic supports complete coal discharge operation; this application is fully mechanized and is put working face coal caving process and need not manual operation, and the working face hydraulic support carries out the coal caving operation according to the position of coal-winning machine is automatic, and is the same with the effect of artifical caving coal, and automatic coal caving has improved working face coal caving efficiency, has avoided the difference of personnel's operation, has reduced the time of coal caving worker work in the coal dust.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a flow chart of a downstream coal caving process of the present application for an automated fully mechanized caving face coal caving method;

FIG. 2 is an ascending coal caving flow chart of the coal caving method for the automatic fully mechanized caving face according to the present application;

FIG. 3 is a schematic view of a downward coal caving of a coal mining machine on a fully mechanized caving face according to an embodiment of the present application;

FIG. 4 is a schematic diagram of coal caving on a fully mechanized coal mining machine according to an embodiment of the present application;

wherein: 100-a coal mining machine; 101-coal cutter position judgment points; 200-a set of hydraulic supports; 300-a hydraulic support; 301-odd numbered hydraulic supports; 302-even numbered hydraulic supports; d1-a set of hydraulic mount ranges; d2-the distance between the coal mining machine and the hydraulic support reaches a preset distance; v-the preset speed of the shearer.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The present application is described in further detail below with reference to the attached drawing figures: