Coal rock dynamic disaster prediction method and device based on dust-slag ratio
A technology of dynamic disasters and prediction methods, applied in the direction of measuring devices, predictions, instruments, etc., can solve the problems of unpredictable working faces, lack of detection means and quantitative indicators for hardness and its changes
Pending Publication Date: 2022-05-06
SHAANXI ZHENGTONG COAL IND CO LTD
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Problems solved by technology
[0003] Drilling methods are generally used to detect and verify the coal seam information in front of the mining face. Conventional drilling methods can detect the thickness and dip of the coal seam, but there is still a lack of detection methods and quantitative indicators for the hardness of the coal and its changes. There are unpredictable weak links in the working face
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[0040] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0041] A coal-rock dynamic disaster prediction method based on dust-slag ratio,
[0042] Step 1, collecting drilling cuttings while drilling during the excavation work;
[0043] Step 2, classify and weigh the cuttings according to the particle size of the cuttings;
[0044] Step 3, according to the quality of cuttings of different particle sizes weighed in step 2, calculate the mass ratio of cuttings of different particle sizes;
[0045] Step 4: Calculate the difference between the mass ratio calculated in step 3 and the standard mass ratio, use the change rate of the difference as the mass ratio index, and predict the hardness of the coal / rock ahead according to t...
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Abstract
The invention provides a coal rock dynamic disaster prediction method and device based on the dust-slag ratio. The coal rock dynamic disaster prediction method comprises the steps that 1, drilling cuttings are collected while drilling in mining work; 2, classifying and weighing the drilling cuttings according to the particle sizes of the drilling cuttings; 3, according to the mass of the drilling cuttings with the different particle sizes weighed in the step 2, the mass ratio of the drilling cuttings with the different particle sizes is calculated; and 4, calculating a difference value between the mass ratio calculated in the step 3 and a standard mass ratio, taking a difference value change rate as a mass ratio index, and pre-judging the hardness of the front coal / rock according to the mass ratio index. The disaster occurrence mechanism is analyzed, drilling cuttings drilled by a drill rod are collected in the drilling period, the collected drilling cuttings are classified and weighed respectively, and the hardness of a coal seam in front of a working face is effectively pre-judged according to the mass ratio, namely the dust-slag ratio, of the drilling cuttings and the collected drilling cuttings. And the coal rock dynamic disaster degree of the front coal seam is predicted according to the pre-judgment new index.
Description
technical field [0001] The invention relates to the technical field of coal mining, in particular to a coal-rock dynamic disaster prediction method and device based on dust-slag ratio. Background technique [0002] Coal and gas outburst and rock burst are the most harmful dynamic phenomena in the production process of coal mines. Among them, coal and gas outburst is mainly dominated by gas, which can be divided into pouring out, pressing out and outburst according to the degree of gas participation. At present, the identification indicators for outburst coal seams mainly include gas pressure, initial velocity of gas release, coal firmness coefficient, and coal failure type, and the gas content is used as an auxiliary indicator. That is, coal and gas outburst identification comprehensively considers the size of coal seam gas, the speed of coal seam gas release, and the ability of coal to resist damage. Even for outburst coal seams, not all areas have outburst danger. Accord...
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Login to View More IPC IPC(8): G06Q10/04G06Q10/06G06Q50/02E21B21/015G01N5/00
CPCG06Q10/04G06Q10/06393G06Q10/06395G06Q50/02E21B21/015G01N5/00
Inventor 刘浩东杨建王建廷齐怀远岗战伟王建伟
Owner SHAANXI ZHENGTONG COAL IND CO LTD