Comprehensive detection method of overburden activity law based on borehole camera shooting
A detection method and overlying rock technology, which is applied in earthwork drilling, wellbore/well components, buildings, etc., can solve the problems of low detection accuracy and poor effect of overlying rock dynamic activity law, achieve high practicability, improve High detection accuracy and high detection efficiency
Inactive Publication Date: 2020-01-10
XINJIANG UNIVERSITY
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[0005] Purpose of the invention: In order to overcome the deficiencies of the prior art, the present invention provides a comprehensive detection method for overlying rock activity rules based on borehole photography, which solves the problem of low detection accuracy and poor effect of overlying rock dynamic activity rules in the prior art question
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[0026] The invention discloses a method for comprehensive detection of overlying rock activity rules based on borehole photography, which is characterized in that the method includes the following steps, such as figure 1 and 2 Shown:
[0027] S1 According to the production geological conditions of the coal mine working face, delineate the detection area 1 corresponding to the overlying rock activities in the stope on the surface;
[0028] S2 In the delineated detection area 1, arrange a trend survey line 2 at intervals M along the advancing direction parallel to the working face 15, and arrange an inclination surveying line 3 at intervals N along the advancing direction perpendicular to the working face 15, wherein, 50m ≤M≤60m, 20m≤N≤35m.
[0029] Then, arrange a ground borehole 4 at a distance P on all the trend survey lines 2 and dip survey lines 3, wherein, 20m≤P≤30m, the intersection group of the strike survey line and the dip survey line must arrange the ground borehole...
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The invention discloses a comprehensive detection method of an overburden activity law based on borehole camera shooting. The comprehensive detection method comprises the steps that a detection area corresponding to overburden activities in a mining area is determined on an earth surface circle according to the production geological conditions of a coal mine working face; strike detection lines and inclination detection lines are arranged, and ground boreholes are formed at intervals in the strike detection lines and the inclination detection lines; a downhole observation point is arranged atthe intersection of a vertical projection of the earth surface inclination detection line with a downhole return airway, and three downhole boreholes with a certain depth are formed in a roof rock formation at different dip angles and azimuth angles; and post-mining observation holes are formed and constructed in the earth surface, and a borehole observing instrument is used for observing the development of cracks and rock strata dislocation situations in the post-mining observation holes to verify the overburden collapse and the development height of fracture zones. The dynamic activity characteristics of the overburden in a stope are detected, a comprehensive detection system of "six condition integration of upper position-middle position-lower position, pre-mining-mining-post-mining" from the earth surface to the overburden to the underground is realized, the operability is high, and the detection efficiency is high.
Description
technical field [0001] The invention relates to the technical field of underground mining of coal resources, in particular to a comprehensive detection method for overlying rock activity rules based on borehole photography. Background technique [0002] Underground mining of coal resources can easily lead to the movement and destruction of the overlying strata, causing safety accidents and environmental disasters such as mine gas outburst, water loss, land desertification, and surface subsidence. An important basis for the contradiction between safe development and environmental disaster prevention. my country's coal resources are widely distributed. Due to the complex and changeable coal seam occurrence conditions and the continuous development of coal mining technology and equipment, the development and activity characteristics of overlying rock fissures are diverse and different, while the overlying rock movement rules are accurate and efficient. Detection has also become...
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IPC IPC(8): E21B47/002E21B49/00
CPCE21B49/00
Inventor 王宏志张东升刘洪林李国栋赵红超
Owner XINJIANG UNIVERSITY
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