Method and device for determining reasonable mining position of high position roadway

Abstract

The invention discloses a method and a device for determining a reasonable mining position of a high position roadway. The determination method is characterized by comprising the following steps of: determining the height of a caving zone and the range of a crack zone in a goaf; selecting an appropriate stratum of the high position roadway in the middle and lower part of the crack zone, and satisfying the following formula: Hz=Hm+Delta Hm, Hm < Hz < H1, wherein Hz is the stratum height of the high position roadway, m; Hm is the height of the high position roadway, m; Delta Hm is the height preventing high extraction roadway from destroying safety, and takes 1 to 1.5 times of the mining height, m; Hl is the height of crack zone, m.

Description

technical field [0001] The present disclosure generally relates to the technical field of coal mining, and in particular relates to a method and a device for determining a reasonable mining position of a high extraction roadway. Background technique [0002] Gas accident is one of the most frequent, most dangerous and most destructive disasters in coal mine production. Fully mechanized caving mining is restricted by many factors, especially the restriction of coal seam gas. With the extension of mine mining to the deep, the gas content and gas pressure are increasing, and the "bottleneck" problem of gas restricting production is becoming more and more prominent. The normal production cannot be guaranteed by only relying on gas exhaustion, and the high-intensity mining of top coal As a result, the gas in the corner of the working face and in the return airway repeatedly exceeds the limit, which seriously affects normal production and poses a huge threat to the safety of pers...

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Problems solved by technology

[0004] Once the high extraction roadway is put into use, the staff cannot enter. Due to the influence of mining on the working face below, the high extraction roadway in the mining crack zone will inevitably be deformed and damaged. The deformation and damage of the high extraction roadway will directly affect the gas drainage of adjacent layers. , restricting the high-yield and high-efficiency production of high-gas mines

At present, scholars at home and abroad lack systematic research on the mining deformation and damage of high pumping roadway. Therefore, it is very necessary to study the mining damage mechanism and optimal layout of high pumping roadway.

[0005] Whether the optimal layout level of the high drainage roadway is reasonable is not only closely related to the gas drainage effect of the working face, but also may affect the difficulty of maintenance of the high drainage roadway itself. If the roadway is arranged in the caving zone, the high drainage roadway will not only It will be destroyed with the caving of the goaf rock strata, and it will be in the natural accumulation area of ​​gangue, the gas concentration in the area will be unstable, and the drainage effect will be poor; if the high pumping roadway is arranged in the curved subsidence zone, the gas permeability of the rock strata in the zone will be poor , it is not easy to extract gas

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