High-position roadway and low-position roadway collaborative gas extraction technical method for high-gas coal seam group
A technology of gas drainage and coal seam group, applied in the direction of gas discharge, mining equipment, earth drilling, etc., to achieve the effect of improving drainage efficiency and ensuring safe and efficient mining
Pending Publication Date: 2022-04-22
CHINA UNIV OF MINING & TECH (BEIJING)
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[0004] In view of the fact that the existing roadway gas drainage methods are difficult to better solve the problem of gas drainage in high-gas coal seam groups, the present invention proposes a technical method for collaborative gas drainage of high-gas coal seam groups with high and low roadways
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[0029] In order to make the above objects, features and advantages of the present invention more comprehensible, an embodiment of the present invention will be further described below in conjunction with the accompanying drawings. In the following description, a lot of specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, and those skilled in the art can do it without departing from the meaning of the present invention. Similarly generalized, the present invention is therefore not limited by the specific embodiments disclosed below.
[0030] The present invention provides the following technical solution: a technical method for collaborative gas extraction of high and low level lanes in high gas coal seam groups, including the following steps:
[0031] S1 According to the geological conditions of the coal seam, the discrete element simulation softwa...
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The invention aims to provide a high-gas coal seam group high-position roadway and low-position roadway collaborative gas extraction technical method which comprises the following steps: firstly, constructing a coal measure strata numerical model through discrete element simulation software, and simulating an area range of dense development of overlying strata cracks in a stope face advancing process; measuring and calculating the gas emission rule of the back mining coal seam by using a source-dividing prediction method; then, a high-position and low-position roadway flow field mathematical model and a three-dimensional physical model are constructed, high-position and low-position roadway gas extraction effects under different negative pressure, vertical distance and horizontal distance conditions are simulated and analyzed, reasonable collaborative extraction technical parameters of the high-position and low-position roadways are determined, a gas extraction system is arranged according to the parameters, and the gas concentration of the corner and the return air flow on the working face is monitored in real time. Through the implementation of the method, high-concentration gas of the adjacent layer and the goaf can be effectively intercepted during stoping of the high-gas coal seam group stoping working face, and the problem that the gas of the high-gas coal seam group mining working face exceeds the limit is solved.
Description
technical field [0001] The patent of the present invention relates to the technical field of gas drainage, in particular to a technical method for coordinated gas drainage of high and low lanes in high-gas coal seam groups. Background technique [0002] With the rapid and sustainable development of the economy, the demand for coal is also increasing, so the mining intensity and depth of coal mining in my country continue to increase. Due to the characteristics of high ground stress, high temperature, high gas pressure and low permeability in deep coal and rock mass, coal and gas outburst disasters are becoming more and more serious, which has become one of the main problems restricting the safe and efficient production of coal mines. How to efficiently control the gas problem of high-gas coal seam groups under complex geological conditions has become a top priority. [0003] The roadway gas drainage method is one of the most widely used and the best gas control methods in m...
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CPCE21F7/00
Inventor 徐超王凯王逸夫赵春雨李晓敏郝文浩郭海军赵伟
Owner CHINA UNIV OF MINING & TECH (BEIJING)