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Coal face advancing speed optimization method based on coal rock stress loading experiment

A coal mining face, stress loading technology, applied in the direction of applying stable tension/pressure to test material strength, material inspection products, measuring devices, etc., can solve the problem of inability to accurately restore the deformation and failure characteristics of coal and rock mass

Active Publication Date: 2021-03-19
XIAN UNIV OF SCI & TECH
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Problems solved by technology

However, rock mechanics experiments are affected by various factors such as loading rate and loading times. The physical and mechanical properties and deformation and failure characteristics of the same rock may be very different under different experimental conditions, and the actual deformation and failure characteristics of coal and rock mass cannot be accurately restored.

Method used

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  • Coal face advancing speed optimization method based on coal rock stress loading experiment
  • Coal face advancing speed optimization method based on coal rock stress loading experiment
  • Coal face advancing speed optimization method based on coal rock stress loading experiment

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Embodiment Construction

[0057] like Figure 1 to Figure 3 A method for optimizing the advancing speed of coal mining face based on the stress loading experiment of coal and rock is shown, and the method includes the following steps:

[0058] Step 1. Obtain the parameters of the coal mining face and the distribution curve of the advance bearing pressure:

[0059] Step 101, obtaining the cutting depth B of the shearer and the burial depth H of the coal mining face;

[0060] Step 102, according to formula v i =n i ×B, get the ith propulsion speed v i ; where n i Indicates the i-th daily set value of the number of coal cutting knives, i is a positive integer;

[0061] Step 103: According to the mine pressure monitoring system, take the distance from the coal mining face as the abscissa and the pressure as the ordinate to obtain the i-th propulsion speed v i The leading bearing pressure distribution curve of the coal seam before the lower coal face is recorded as the i-th leading bearing pressure di...

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Abstract

The invention discloses a coal face advancing speed optimization method based on a coal rock stress loading experiment. The method comprises the following steps: 1, obtaining coal face parameters andan advance bearing pressure distribution curve; 2, arranging monitoring points and acquiring stress; 3, acquiring a stress increase gradient average value; and 4, carrying out a coal rock stress loading experiment to obtain the maximum value of the advancing speed of the coal face. The method is simple in step and reasonable in design, the loading of the stress rate of the coal rock is determined,experimental errors caused by uncertain factors of the stress loading rate in the coal rock stress loading experiment are reduced, the accuracy and reliability of the coal rock stress loading experiment are improved, and basis and guidance are provided for optimization of the advancing speed of the coal face.

Description

technical field [0001] The invention belongs to the technical field of mining engineering, and in particular relates to a method for optimizing the advancing speed of a coal mining face based on a coal rock stress loading experiment. Background technique [0002] "Rich in coal, poor in oil, and low in gas" is the basic feature of my country's energy structure. The resource endowment dominated by coal is the basic national condition of my country. Coal is the main energy used in my country and an important chemical raw material. With the improvement of the mechanization degree of coal mining face in my country, the advancing speed of the working face is gradually accelerated, and the coal output is gradually increasing. However, the ensuing dynamic disasters such as rockburst and rock burst are becoming more and more serious, which seriously restricts the safety and efficiency of coal in my country. Production. [0003] The occurrence of dynamic disasters such as rockburst an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08G01N33/22
CPCG01N3/08G01N33/222Y02T90/00
Inventor 崔峰董帅来兴平陈建强孙秉成杨贵儒刘旭东张廷辉曹建涛单鹏飞
Owner XIAN UNIV OF SCI & TECH
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