A method for predicting water inflow in fully mechanized caving face based on analytical method
A fully mechanized working face and working face technology, applied in surveying, earthwork drilling, mining equipment, etc., can solve problems such as large difference, roof water damage accidents, idle drainage system, etc., and achieve the effect of ensuring safe and efficient mining
Active Publication Date: 2020-11-06
中煤能源研究院有限责任公司
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Problems solved by technology
The traditional estimation of water inflow mainly includes analytical method, numerical method, hydrogeological condition comparison method and statistical method, etc. However, in the absence of reliable hydrogeological parameters, the traditional estimation method often differs greatly from the actual situation.
When the predicted value is large, the drainage system will be idle; when the predicted value is small, it is easy to cause roof water damage accidents
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Embodiment
[0045] In this embodiment, the prediction of water inflow at the 103 fully mechanized caving face of a mine in a deep Jurassic coal seam is taken as an example, and the steps are as follows:
[0046] Step 1: The width of the 103 working face of a certain mine is 300m, the strike length is 1100m, the average thickness of the coal seam is about 10m, and the mining method is fully mechanized caving mining; compared with (201) the working face width is 300m, the average thickness of the coal seam is 5.92m, and the mining method is fully mechanized mining .
[0047] According to field measurement and numerical simulation analysis, the post-mining split-production ratio of the comparative working face is 23.7; the predicted post-mining split-production ratio of the working face is 25.4 through multiple linear regression and numerical simulation analysis.
[0048] Step 2: According to the actual exposure of drilling holes during the exploration period, the thickness of the water-fill...
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The invention discloses a method for comparing and forecasting the water inflow of a fully mechanized work face based on an analytical method. The method includes the steps that firstly, the water diversion fissure zone height of a forecasting water face and a comparison work face is obtained; secondly, relevant parameters of the forecasting water face and the comparison work face are determined;thirdly, the proportionality coefficient between the forecasting work face water inflow Q1 and the comparison work face water inflow Q0 is determined based on the analytical method; and fourthly, thewater inflow of the fully mechanized work face is forecasted. By means of the method for comparing and forecasting the water inflow of the fully mechanized work face based on the analytical method, the water inflow of the fully mechanized work face is used for forecasting the water inflow of the fully mechanized work face based on the analytical method, the nonlinear relationship between the waterinflow and the thickness of a filled water bearing strata is taken into consideration, the forecasting result is more accurate, a reasonable basis is provided for fortification of the work face and adraining system of a mine, the capital investment cost of the mine is saved, and safe and efficient production of the mine is ensured.
Description
technical field [0001] The invention belongs to the technical field of water disaster prevention and control in coal mining, and in particular relates to a method for predicting the water inflow of a fully mechanized caving face based on an analytical method. Background technique [0002] With the gradual westward shift of the strategic center of coal resources in my country, the mining of Jurassic coal seams in the west has extended from shallow to deep, and the accurate prediction of roof water inflow is facing more severe tests. At present, most of the mines mining deep Jurassic coal seams are new mines, and the deep Jurassic coal seams have not yet been exploited on a large scale. The degree of hydrogeological exploration in mining areas is generally low, and the obtained hydrogeological parameters are very limited. The traditional estimation of water inflow mainly includes analytical method, numerical method, hydrogeological condition comparison method and statistical m...
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IPC IPC(8): E21F17/00E21B47/00G06F30/20G06F111/10
CPCE21B47/00E21F17/00
Inventor 谢朋丁湘蒲治国张坤贺晓浪黄海鱼
Owner 中煤能源研究院有限责任公司