Optimization method of drilling quantitative partition layout based on coal mine gas drainage production capacity prediction

Abstract

The invention discloses a quantitative and divisional drill hole arrangement optimization method based on coal mine gas extraction production prediction. The quantitative and divisional drill hole arrangement optimization method comprises the following steps that a critical value of reaching the standard of mine gas extraction is determined; the relation between the effective extraction radius and the extraction time is obtained; according to the linkage deployment and roadway tunneling time and roadway stopping time of working face pumping-digging-extraction, the longest pre-pumping time and shortest pre-pumping time of working face extraction drill holes are determined; a quantitative and divisional drill hole arrangement optimization scheme is achieved according to an obtained result. The linkage balance problem of pumping, digging and extraction of coal seam gas to be pumped can be solved, the relation between the pre-pumping time and a drill hole separation distance is researched based on coal mine gas extraction production prediction, and meanwhile quantitative and divisional optimization of pumping and extraction drill hole arrangement parameters is achieved from the spatio-temporal perspective by combining with the mine pumping and extraction linkage relation.

Description

technical field [0001] The invention relates to the technical field of coal seam gas drainage, in particular to a drilling quantitative partition layout optimization method based on coal mine gas drainage production capacity prediction. Background technique [0002] Gas (coal bed methane) is an associated product in the coal formation process, a natural gas produced by humic organic matter in the coal formation process and stored in coal seams and coal-measure formations, and its main component is methane. Gas is an important hidden danger that causes coal mine production safety accidents. Gas exists in coal seams in two forms: free state and adsorbed state, among which the amount of adsorbed gas accounts for 80% to 90%, and the amount of free gas accounts for 10% to 20%. In coal seam mining, coal seam gas is continuously released due to the impact of mining operations, resulting in coal and gas outburst, gas explosion, gas suffocation and other hazards, which seriously thr...

AI Technical Summary

Problems solved by technology

However, in the existing technology, the layout of the drilling distance in coal mining enterprises is mostly based on empirical estimation, and the parameter design lacks a theoretical basis, which often results in insufficient pre-extraction time and excessive drilling engineering, which seriously affects the extraction, excavation, and extraction. Efficient connection deployment

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