Synchronous detection method of terrane crack distribution of base plate
A synchronous detection and fracture distribution technology, applied in surveying, earthwork drilling, wellbore/well components, etc., can solve problems such as long time required, limited popularization and application, and no hole collapse, to ensure timeliness and application scope. Wide and short measurement time
Active Publication Date: 2010-10-13
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology
Among them: the disadvantage of the porous closed pressurized water observation method is that the engineering consumption is large, and the measured data are continuous observation data at all depths, which limits its popularization and application
Drilling segmented water injection and air-inflated leak detection technology is to use water-air dual-purpose drilling double-end plugging leak detection device, in conjunction with other instruments, to perform segmental plugging water injection or air-inflated leak detection for any upward and downward boreholes to obtain observation data, according to the drilling According to the different depths of the holes and the corresponding water loss, draw the water loss velocity map at different positions in the borehole, and finally determine the degree of rock formation rupture or crack development at different depths; The leakage device is pushed into the hole for measurement; this brings two significant disadvantages: one is that the drilling and water injection leak detection are carried out step by step, which takes a long time and cannot handle emergency situations; There are collapsed holes and rock formations that are not suitable for some special geological conditions
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[0019] ①Drilling and testing equipment is installed in the underground roadway (see figure 1 ), including a tunnel drilling rig 6, a water tank 2 placed on the mine car 1 and a temporary pool 8, a water flow meter 5 and a water flow control switch 3 are connected in series on the outlet hose 4 of the water tank 2; pulp equipment (see figure 2 ), including mud pump 10, yellow mud irrigation 11 and mud delivery pipe 12.
[0020] ②Start the tunnel drilling machine 6, drill the drilling hole 7 along the direction perpendicular to the layer of the rock formation 9, turn on the water flow control switch 3 during the drilling process of the drilling hole 7, and let the water automatically flow into the drilling hole 7 through the water outlet hose 4 During drilling, water is injected while drilling, and the water volume is controlled to keep the flow level equal to the orifice.
[0021] ③During the process of drilling while injecting water, record the location of the drill bit and...
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The invention discloses a synchronous detection method of the terrane crack distribution of a base plate, comprising the following steps of: firstly, injecting water while drilling in the drilling process; secondly, drawing a water current leak-off velocity diagram for different positions in a drilling hole according to different drilling depths and corresponding water loss amount; and finally determining the fracture or crack development degrees of terranes with different depths. The invention realizes that the drilling and the water inject leakage test are synchronously carried out, ensuresthe real-time property for drilling and measuring, needs short measuring time and is suitable for geological conditions of any terrane.geological condition.
Description
technical field [0001] The invention relates to a technical method for testing rock mass engineering, in particular to a technical method for detecting the degree and location of cracks in mine floor rock formations. Background technique [0002] At present, among the technical methods used for the development of rock mass fissures or the destruction of surrounding rocks, there are borehole TV detection method and borehole leak detection method. The fluid loss in the hole is used to determine the fracture development of the rock mass in the hole. The technology related to the present invention is the drilling leak detection method. [0003] Drilling leak detection methods include porous sealing pressurized water observation method and drill hole segmented water injection and gas leakage detection technology. Among them: the disadvantage of the porous closed pressurized water observation method is that the engineering consumption is large, and the measured data are continuo...
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IPC IPC(8): E21B47/00E21B49/00
Inventor 谭云亮赵同彬张泽
Owner SHANDONG UNIV OF SCI & TECH
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