Method for testing vertical three zone heights of stope cover rock based on high level borehole flow

A high-level drilling and high-level technology, applied in earthwork drilling, surveying, mining equipment, etc., can solve the problems of complex operation, high test cost, and limited use, and achieve the effect of simple operation, reliable results, and complex operation

CN104405372AInactive Publication Date: 2015-03-11HENAN POLYTECHNIC UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2015-03-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for testing vertical three zone heights of a stope cover rock based on high level borehole flow. High level boreholes of which the trends are obliquely intersected are constructed from entity coal in a working face coal roadway to a side unloading area of a goaf; the heights of a caving zone and a diversion fissure zone of the stope cover rock are judged and tested by using drainage data of the high level boreholes of which the trends are obliquely intersected. The method disclosed by the invention is relatively low in test cost, simple in operation and reliable in result. By fully utilizing existing technical equipment and conditions of coal mines, the vertical three zone heights of the stope cover rock can be simply and quickly determined by using flow change of the high level boreholes.
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Description

technical field

[0001] The invention belongs to the technical field of calculating the height of three vertical zones of overlying rock in a mine stope, and in particular relates to a method for testing the height of three vertical zones of overlying rock in a stope based on the flow rate of a high-position oblique drilling hole. Background technique

[0002] More than 90% of underground mining mines in my country have gas gushing out. Due to the influence of gas gushing out of the goaf, the gas in the upper corner of the working face exceeds the limit. In order to effectively solve the problem of gas gushing out of the goaf, most mines All goaf pressure relief gas drainage technology is adopted. In general, the range of overburden rock fissures is the enrichment area of ​​high-concentration gas in the goaf. The height of the fissure zone is the main technical index for judging whether the coal seam can be mined and determining the mining thickness. At the same time, the colla...

Examples

Embodiment Construction

[0045] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0046] The application principle of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0047] Such as figure 1 As shown, the method for testing the height of the three vertical zones of the overlying rock in the stope based on the flow rate of the high-level drilling in the embodiment of the present invention includes the following steps:

[0048] S101: Construct strike oblique high-level drilling in the coal rock entity in the direction of the goaf in the return airway;

[0049] S102: With the advancement of the working face, the drill hole will...